---
url: 'https://www.corbado.com/blog/best-ciam-solutions'
title: 'Best CIAM Solutions 2026: Passwordless & AI Compared'
description: 'Compare the best CIAM solutions in 2026. Evaluate Auth0, Clerk, Descope, Ory, Stytch, Ping Identity and more on passkeys, AI agent identity and TCO.'
lang: 'en'
author: 'Vincent'
date: '2026-03-18T10:10:30.777Z'
lastModified: '2026-03-31T06:01:54.897Z'
keywords: 'best CIAM solutions, CIAM comparison 2026, passwordless CIAM, passkey CIAM platform, AI agent identity management, CIAM vendor evaluation'
category: 'Passkeys Reviews'
---

# Best CIAM Solutions 2026: Passwordless & AI Compared

## Key Facts

- **Passkey adoption** stagnates at 5-10% with generic **CIAM** implementations. At 500k
  MAU, that leaves 450k users on passwords and SMS OTP.
- **AI agent identity** via the **Model Context Protocol (MCP)** is now a core CIAM
  requirement: 95% of organizations cite identity concerns around AI agents.
- Passkeys cut **SMS OTP** costs 60-90% at scale. At 500k MAU, that translates to USD
  50k-100k or more in annual savings.
- Building passkeys natively on any CIAM platform requires 25-30 FTE-months across
  product, development and QA, plus 1.5 FTE per year for ongoing maintenance.
- **Firebase** and **Supabase** lack native passkey support entirely, making them
  unsuitable for large-scale B2C deployments that require enterprise-grade **passwordless
  authentication** or adaptive MFA.

## 1. Introduction: CIAM Solutions for large-scale B2C

Customer Identity and Access Management (CIAM) has evolved from a simple login portal into
the central nervous system of the digital enterprise. For
[large-scale](https://www.corbado.com/blog/introducing-passkeys-large-scale-overview) B2C deployments - think
500k monthly active users (MAU) out of a 2M total user base - the CIAM choice directly
impacts security posture, authentication costs and
[conversion rates](https://www.corbado.com/blog/logins-impact-checkout-conversion).

Organizations face a dual mandate in 2026. First, they must eradicate passwords, which
remain the primary vector for data breaches and account takeovers. Second, they must
authenticate non-human entities - specifically AI agents acting via protocols like the
Model Context Protocol (MCP).

This report evaluates the leading CIAM solutions for
[large-scale](https://www.corbado.com/blog/introducing-passkeys-large-scale-overview) B2C in 2026 -
[Auth0](https://www.corbado.com/blog/auth0-passkeys-analysis), Clerk, Descope, Ory, Ping Identity, IBM Verify,
Stytch, Zitadel, [Amazon Cognito](https://www.corbado.com/blog/passkeys-amazon-cognito), FusionAuth, Firebase and
[Supabase](https://www.corbado.com/blog/supabase-passkeys) - with rough pricing estimates at 500k MAU. It also
explains how Corbado solves the pervasive challenge of
[passkey adoption](https://www.corbado.com/blog/passkey-adoption-business-case) on top of any CIAM platform.

## 2. Macro Trends dictating the 2026 CIAM Market

### 2.1 Passwordless Imperative and the Adoption Fallacy

Passwords and SMS OTPs are fundamentally flawed - susceptible to
[phishing](https://www.corbado.com/glossary/phishing), [credential stuffing](https://www.corbado.com/glossary/credential-stuffing) and
user friction. The [FIDO Alliance](https://www.corbado.com/glossary/fido-alliance)'s WebAuthn standard (passkeys)
solves this with public-key cryptography and domain binding, making authentication
inherently [phishing](https://www.corbado.com/glossary/phishing)-resistant.

By 2026, seventy-five percent of consumers are aware of passkeys and nearly half of the
top 100 websites offer them. Passkeys deliver massive improvements in login speed and
success rates. For large B2C deployments, transitioning to passkeys can yield up to a 90%
reduction in SMS costs - at 500k MAU, that translates to hundreds of thousands of dollars
in annual savings.

However, the market faces a "native
[passkey adoption](https://www.corbado.com/blog/passkey-adoption-business-case) fallacy." Most identity providers
offer passkey / WebAuthn APIs, but organizations enabling them frequently see adoption
stagnate at 5 to 10 percent. The cause: generic UIs that blindly prompt users, causing
login drop-off and support tickets. Modern CIAM evaluation must assess a platform's
ability to drive intelligent [passkey adoption](https://www.corbado.com/blog/passkey-adoption-business-case)
journeys, not just check a WebAuthn API result.

### 2.2 Agentic AI and the Model Context Protocol (MCP)

The most disruptive force in 2026 CIAM is machine identity. As AI transitions from
chatbots to autonomous agents executing workflows and accessing APIs, traditional
human-centric IAM is collapsing. 95% of organizations cite identity concerns regarding AI
agents.

The
[Model Context Protocol (MCP)](https://cloud.google.com/discover/what-is-model-context-protocol) -
an open standard by Anthropic - provides a universal language for LLMs to communicate with
external data and tools:

- **MCP Host:** the environment containing the LLM (e.g. an AI-powered IDE).
- **MCP Client:** the conduit within the host facilitating communication.
- **MCP Server:** the external service exposing capabilities and data.
- **Transport Layer:** the mechanism using JSON-RPC 2.0 messages.

The W3C's emerging WebMCP introduces a browser-native API (`navigator.modelContext`) for
websites to expose features as structured tools to AI agents. In 2026, a CIAM provider
must support OAuth 2.1, Client ID Metadata Documents (CIMD) and tool-level scopes to
govern AI agents alongside human users.

### 2.3 AI in CIAM: Reality vs. Hype

Not all AI features in CIAM deliver equal value.

**Truly useful:**

- **Risk-based adaptive Authentication:** analyzes behavioral biometrics, location, device
  reputation and time of day to dynamically adjust
  [login friction](https://www.corbado.com/blog/login-friction-kills-conversion). Enforces MFA only on anomalous
  behavior.
- **Agentic Identity Management:** treating AI agents as first-class identities with
  fine-grained authorization, task-scoped credentials and secured M2M communications via
  MCP.
- **AI-powered Fraud Detection:**
  [machine learning](https://www.corbado.com/blog/10-top-nodejs-libraries-machine-learning) to identify
  [credential stuffing](https://www.corbado.com/glossary/credential-stuffing), bot networks and fraudulent
  account creation at the perimeter.

**Hype and "nice-to-haves":**

- **AI Coding Assistants for Auth Logic:** using LLMs to write security-critical scripts
  introduces [vulnerabilities](https://www.corbado.com/glossary/vulnerability) if not rigorously audited.
- **"AGI" Identity Governance:** promises of general intelligence governing identity
  without structured data. LLMs hallucinate without curated identity context - true
  security needs deterministic rules.

## 3. Vendor Profiles

The table below compares all evaluated vendors with a focus on
[large-scale](https://www.corbado.com/blog/introducing-passkeys-large-scale-overview) B2C deployments at 500k MAU
(2M total user base). Pricing estimates are rough approximations based on publicly
available data and may vary with negotiated enterprise contracts.

**2026 CIAM Vendor Overview (500k MAU / 2M Users)**

| **Vendor**         | **Passkeys / Passwordless**                                                      | **Est. Price at 500k MAU**            | **Pros**                                                   | **Cons**                                                        |
| ------------------ | -------------------------------------------------------------------------------- | ------------------------------------- | ---------------------------------------------------------- | --------------------------------------------------------------- |
| **Auth0**          | Passkeys in Universal Login (hosted page) + API/SDK, all tiers, no adoption push | $15k-30k/mo (enterprise custom)       | Boundless extensibility, vast marketplace, mature platform | Expensive at scale, steep learning curve                        |
| **Clerk**          | Dashboard toggle enables passkeys in pre-built components                        | \~$9k/mo (Pro, $0.02/MRU) or custom   | Best-in-class DX, fast deploy                              | React-centric, limited self-hosting, costly at high MAU         |
| **Descope**        | Visual drag-and-drop passkey workflows                                           | Custom enterprise pricing             | No-code orchestration, strong B2C UX                       | Limited customization with own frontend                         |
| **Ping Identity**  | Passkeys via WebAuthn nodes in DaVinci flows + SDK support                       | $35k-50k+/yr (enterprise)             | Deep compliance, hybrid deployment, ForgeRock merger       | Complex setup, legacy pricing, steep learning curve             |
| **IBM Verify**     | FIDO2/passkey with adaptive MFA                                                  | Custom (Resource Units)               | Hybrid cloud, AI-driven ITDR                               | Complex pricing, outdated admin UI, steep setup                 |
| **Ory**            | Simple passkey strategy available                                                | \~$10k/yr (Growth) + custom           | Open-source, modular, granular RBAC/ABAC                   | Requires custom UI, high engineering lift                       |
| **Stytch**         | Passkeys via WebAuthn API/SDK, requires verified primary factor first            | \~$4.9k/mo (B2C Essentials) or custom | Strong fraud prevention, Web Bot Auth for AI agents        | Requires engineering lift, B2B plan expensive at scale          |
| **Zitadel**        | Built-in passkeys                                                                | Custom enterprise pricing             | Open-source                                                | Smaller ecosystem                                               |
| **Amazon Cognito** | Native passkeys in Managed Login v2 (Essentials tier+), API support              | \~$7k-10k/mo (Essentials/Plus)        | Massive AWS scalability, low base price                    | Heavy engineering overhead, limited UI, hidden maintenance cost |
| **FusionAuth**     | Native WebAuthn in hosted login pages + API for custom flows                     | \~$3.3k-5k/mo (Enterprise)            | Full self-hosting, no vendor lock-in                       | Requires dedicated ops, smaller community                       |
| **Firebase Auth**  | No native passkey support                                                        | \~$2.1k/mo (Identity Platform)        | Fast setup, generous free tier, Google Cloud integration   | No passkeys                                                     |
| **Supabase Auth**  | No native passkey support                                                        | \~$599/mo (Team plan)                 | PostgreSQL-native, open-source, fast DX                    | No passkeys                                                     |

### 3.1 Auth0 (Okta Customer Identity Cloud)

![Auth0 CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/auth0_aaa4252efd.png)

[Auth0](https://www.corbado.com/blog/auth0-passkeys-analysis) is the dominant incumbent. Its core strength is
extensibility: [Auth0](https://www.corbado.com/blog/auth0-passkeys-analysis) Actions let architects inject custom
[Node.js](https://www.corbado.com/blog/nodejs-passkeys) logic for claims mapping, risk scoring and API
integrations. The [Auth0 Marketplace](https://marketplace.auth0.com/) adds pre-validated
integrations for [identity proofing](https://www.corbado.com/blog/digital-identity-guide), consent and fraud
detection.

At 500k MAU, Auth0 is firmly in enterprise-contract territory. MAU-based pricing with
strict feature paywalls creates a "growth penalty." Expect $15k-30k/month depending on
features and negotiation. For large-scale B2C with complex legacy integrations, Auth0
remains a solid option but expensive.

### 3.2 Clerk

![Clerk CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/clerk_88b6810a5c.png)

Clerk dominates the [React](https://www.corbado.com/blog/react-passkeys) and [Next.js](https://www.corbado.com/blog/nextjs-passkeys)
ecosystem with composable, drop-in components (`\<SignIn /&gt;`, `\<SignUp /&gt;`) that
let developers launch authentication in minutes.

After a $50M Series C involving Anthropic's Anthology Fund, Clerk committed to "Agent
Identity" - redesigning APIs and [React](https://www.corbado.com/blog/react-passkeys) hooks for AI tool
performance and aligning with IETF specifications to extend OAuth for agent identities. At
500k MAU on the Pro plan ($0.02/MRU after 50k included), expect \~$9k/month. Enterprise
contracts with volume discounts bring this down.

### 3.3 Descope

![Descope CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/descope_dbbcba93d8.png)

[Descope](https://www.descope.com/) differentiates with a visual, no-code identity
orchestration engine. Product managers can design authentication workflows, A/B test
passwordless flows and map user journeys via drag-and-drop - decoupling identity logic
from application code.

Its Agentic Identity Hub 2.0 treats AI agents as first-class identities, enforcing
enterprise-grade policies on MCP servers. At 500k MAU, enterprise custom pricing applies -
the $0.05/MAU overage rate on Growth tier would be prohibitive ($24k+/month), so negotiate
directly.

### 3.4 Ping Identity (including ForgeRock)

![Ping Identity CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/ping_identity_6b35686348.png)

Following the merger with ForgeRock, Ping Identity offers one of the most comprehensive
enterprise identity suites. PingOne Advanced Identity Cloud provides passkey
authentication via orchestration nodes in the DaVinci visual flow engine.

Ping excels in regulated industries with deep compliance certifications, hybrid deployment
and patented data isolation. Customer Identity packages start at $35k-50k/year, scaling
with MAU volume. Setup requires significant expertise.

### 3.5 IBM Verify

![IBM Verify CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/ibm_verify_b9e31988bc.png)

[IBM Verify](https://www.ibm.com/) targets large regulated enterprises needing hybrid
identity across cloud and on-premises. It supports [FIDO2](https://www.corbado.com/glossary/fido2)/passkey
authentication with [adaptive MFA](https://www.corbado.com/glossary/adaptive-mfa), progressive consent-based
registration and lifecycle management for millions of identities.

IBM Verify includes AI-driven identity threat detection and response (ITDR) monitoring
both human and non-human identities. Pricing uses Resource Units (roughly $1.70-2.00 per
user/month at smaller scales), but at 500k MAU, expect deeply negotiated enterprise
contracts.

### 3.6 Ory

![Ory CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/ory_70ce0810f8.png)

Ory provides a scalable, API-first identity solution built on open-source Go foundations.
Its modular architecture lets teams use
[identity management](https://www.corbado.com/blog/digital-identity-guide), OAuth2 or permissions independently.
Ory Network scales globally, but teams must build custom UIs.

Ory uses aDAU-based pricing (average Daily Active Users) instead of MAU, claiming up to
85% savings vs. MAU-based competitors. The Growth plan starts at \~$10k/year, but 500k MAU
would require enterprise negotiation.

### 3.7 Stytch (a Twilio Company)

![Stytch CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/stytch_4d9bda8d00.png)

After its acquisition by Twilio in late 2025, Stytch serves as the identity layer for the
Twilio ecosystem. Originally known for programmatic passwordless auth (magic links,
biometrics, OTPs), Stytch now focuses on fraud prevention and AI security.

Its Web Bot Auth lets benign AI agents cryptographically authenticate to websites. For B2C
at 500k MAU, the Essentials plan ($0.01/MAU after 10k free) costs \~$4.9k/month. The
B2B-focused Growth plan ($0.05/MAU) would cost \~$25k/month. At this scale, enterprise
negotiation is typical.

### 3.8 Zitadel

![Zitadel CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/zitadel_1fca659b7c.png)

Zitadel is an open-source alternative to Ory - cloud-native, API-first and written in Go.
It natively includes delegated access management and
[social login](https://www.corbado.com/glossary/social-login) via OAuth/OIDC. Pay-as-you-go pricing avoids
per-seat lock-in, with seamless parity between open-source and managed versions. At 500k
MAU, enterprise pricing applies.

### 3.9 Amazon Cognito

![Amazon Cognito CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/amazon_cognito_f92356a929.png)

[Amazon Cognito](https://www.corbado.com/blog/passkeys-amazon-cognito) provides massive scalability within the
[AWS](https://www.corbado.com/blog/passkeys-amazon-cognito) ecosystem. Since late 2024,
[Cognito](https://www.corbado.com/blog/passkeys-amazon-cognito) supports native passkeys via Managed Login v2 on
the Essentials tier and above - the cheaper Lite tier ($0.0046-0.0055/MAU, \~$2.1k/mo at
500k MAU) does not support passkeys. For passkey-capable tiers at 500k MAU: Essentials
costs \~$7,350/month ($0.015/MAU); Plus (with threat protection) costs \~$10,000/month
($0.020/MAU). While the base price is competitive, hidden costs remain substantial:
engineering overhead for custom UIs beyond Managed Login and limited passkey adoption
tooling.

### 3.10 FusionAuth

![FusionAuth CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/fusionauth_05c7be5f88.png)

FusionAuth offers a self-hostable, API-first CIAM with native WebAuthn support - avoiding
vendor lock-in entirely. Enterprise licensing starts at \~$3,300/month for up to 240k MAU.
For 500k MAU, expect $4k-5k/month on a multi-year contract. The trade-off: self-hosting
requires dedicated DevOps resources.

### 3.11 Firebase Auth

![Firebase Authentication CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/firebase_authentication_af3632dfa5.png)

Firebase Authentication provides fast, simple auth for consumer apps. At 500k MAU on
Google Cloud Identity Platform, tiered pricing (50k free, then $0.0055-$0.0046/MAU)
results in \~$2.1k/month for basic auth. SMS verification costs extra via SNS. However,
Firebase lacks native passkey support, offers only SMS MFA and provides no advanced
governance. It is not a viable CIAM choice for large-scale B2C deployments requiring
[passwordless authentication](https://www.corbado.com/glossary/passwordless-authentication) or enterprise-grade
security.

### 3.12 Supabase Auth

![Supabase Authentication CIAM 2026](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/supabase_authentication_9ffda839b4.png)

[Supabase](https://www.corbado.com/blog/supabase-passkeys) Auth appeals to developers building on
[PostgreSQL](https://www.corbado.com/blog/passkey-webauthn-database-guide). The Team plan ($599/month) includes
up to 500k MAU. However, it has no native passkey support - passkeys require third-party
integrations. It also lacks
[adaptive authentication](https://www.corbado.com/blog/continuous-passive-authentication) and
[identity proofing](https://www.corbado.com/blog/digital-identity-guide). [Supabase](https://www.corbado.com/blog/supabase-passkeys) is
best suited as an auth starting point, not as a long-term CIAM for large-scale B2C.

## 4. Category-by-Category CIAM Evaluation

### 4.1 Passwordless and Passkey Capabilities

For large-scale B2C, passkey execution depth determines how much
[SMS cost](https://www.corbado.com/blog/sms-cost-reduction-passkeys) you can actually cut. At 500k MAU, even a
ten-percentage-point improvement in passkey adoption saves tens of thousands per month.

Descope offers the most sophisticated visual passkey experience. Organizations can pilot
passkey flows without backend code changes. Domain-specific passkey routing prevents
authentication failures across subdomains, with built-in fallbacks to biometrics, magic
links and OTPs.

Clerk streamlines passkeys to a single dashboard toggle. Its
[Next.js](https://www.corbado.com/blog/nextjs-passkeys) components handle WebAuthn registration and
authentication natively, including account recovery and device sync.

Auth0 includes passkeys on all plans via its Universal Login hosted page, with API/SDK
support for custom flows and cross-domain passkey authentication via configurable
[Relying Party](https://www.corbado.com/glossary/relying-party) ID. However, Auth0 offers no dedicated adoption
features and cannot fully disable passwords, often leading to the 5-10% adoption fallacy.

Ping Identity supports passkeys through WebAuthn nodes in its DaVinci orchestration
engine - complex to configure.

IBM Verify offers passkey support with [adaptive MFA](https://www.corbado.com/glossary/adaptive-mfa) and
[passkey autofill](https://www.corbado.com/blog/webauthn-conditional-ui-passkeys-autofill). Strong compliance
integration but high setup complexity.

Stytch offers passkeys via WebAuthn API/SDK with frontend SDKs for JS,
[React](https://www.corbado.com/blog/react-passkeys) and [Next.js](https://www.corbado.com/blog/nextjs-passkeys). It requires a verified
primary factor (email or phone) before passkey registration, adding friction to the
[passkey onboarding](https://www.corbado.com/faq/steps-creating-passkey-user-onboarding) flow.

Ory offers a dedicated [passkey strategy](https://www.corbado.com/blog/passkeys-product-design-strategy) with
[conditional UI](https://www.corbado.com/glossary/conditional-ui) and discoverable credentials. Zitadel provides
built-in passkey support with self-service registration.
[Amazon Cognito](https://www.corbado.com/blog/passkeys-amazon-cognito) now offers native passkeys in Managed
Login v2 (Essentials tier+). FusionAuth supports WebAuthn in its hosted login pages and
via API for custom flows.

Firebase and Supabase lack native passkey support entirely.

**Passwordless and Passkey Comparison**

| **Provider**      | **Passkey Approach**                                               | **Passkey Adoption Tooling**                    | **Device-aware Prompting** |
| ----------------- | ------------------------------------------------------------------ | ----------------------------------------------- | -------------------------- |
| **Auth0**         | Universal Login hosted page + API/SDK, all tiers                   | None - developer must build adoption UX         | No                         |
| **Clerk**         | Dashboard toggle, pre-built components with autofill               | Basic - toggle enables passkeys, no analytics   | No                         |
| **Descope**       | Visual drag-and-drop workflows, domain-specific routing            | Visual flow A/B testing, no device intelligence | Partial (flow conditions)  |
| **Ping Identity** | WebAuthn nodes in DaVinci + SDK for native apps                    | None - requires custom journey logic            | No                         |
| **IBM Verify**    | FIDO2/passkey with adaptive MFA, passkey autofill in Flow Designer | None - admin-driven enrollment                  | No                         |
| **Stytch**        | WebAuthn API/SDK, requires verified primary factor first           | None - developer must build adoption UX         | No                         |
| **Ory**           | Dedicated passkey strategy with conditional UI                     | None - developer must build everything          | No                         |
| **Zitadel**       | Built-in passkeys with self-service registration                   | None - basic admin enrollment                   | No                         |
| **Cognito**       | Native passkeys in Managed Login v2 + API                          | None - requires custom Lambda logic             | No                         |
| **FusionAuth**    | Native WebAuthn in hosted login + API for custom flows             | None - basic admin enrollment                   | No                         |
| **Firebase**      | None (third-party only)                                            | N/A                                             | N/A                        |
| **Supabase**      | None (third-party only)                                            | N/A                                             | N/A                        |

### 4.2 AI Capabilities and Agent Identity Management

Descope leads in visual AI identity orchestration. Its Agentic Identity Hub 2.0 manages AI
agents as first-class identities with OAuth 2.1, PKCE and tool-level scopes on MCP
servers.

Clerk optimizes React hooks for AI tool performance and aligns with IETF specifications
for OAuth-based agent identities.

Stytch focuses on verification and fraud. Its Web Bot Auth lets applications
cryptographically verify benign AI agents while blocking rogue ones.

IBM Verify contributes AI-driven ITDR monitoring both human and non-human identities,
though MCP-specific tooling is less mature.

Ping Identity provides enterprise-grade M2M authentication and OAuth 2.1 support through
DaVinci, suitable for regulated environments.

### 4.3 Developer Experience (DX) and Implementation Velocity

Clerk offers the most frictionless DX for modern frontend ecosystems with pre-built
React/Next.js components and a copy-to-install model.

Supabase and Firebase appeal to developers seeking rapid prototyping, though both lack
advanced CIAM features for large-scale B2C.

Auth0 offers comprehensive documentation but demands a steep learning curve. Actions
provide power for legacy integrations but feel cumbersome for rapid deployment.

Ping Identity and IBM Verify have the steepest learning curves - suited for dedicated
identity teams in large enterprises.

### 4.4 Total Cost of Ownership (TCO) at 500k MAU

Procurement evaluations focused solely on licensing fees miss the real TCO. At 500k MAU
with a 2M user base, the true cost is driven by three factors: platform fees,
implementation effort and ongoing maintenance.

**Platform fees** vary dramatically. Auth0 sits at the high end ($15k-30k/month).
[Cognito's](https://www.corbado.com/blog/passkeys-amazon-cognito) passkey-capable Essentials tier (\~$7.3k/month)
appears mid-range but hides engineering overhead. Stytch's B2C Essentials plan
(\~$4.9k/month) and Clerk (\~$9k/month) offer competitive rates. FusionAuth, Firebase and
Supabase are the lowest-cost options but require self-hosting or lack
[passkey features](https://www.corbado.com/blog/social-logins-pre-filled-passkeys-customization) respectively.

**Implementation effort** is the overlooked cost. Building passkeys from scratch in a CIAM
platform requires roughly 25-30 FTE-months across product management (\~5.5 FTE-months),
development (\~14 FTE-months) and QA (\~8 FTE-months).
[Cognito](https://www.corbado.com/blog/passkeys-amazon-cognito) now offers native passkey support via Managed
Login v2, reducing effort vs. fully custom builds - but customization beyond the managed
flow still requires significant work. On a purely API-first platform like Ory, all UX must
be built from scratch. Platforms with pre-built passkey UI (Clerk, Descope) reduce this to
5-10 FTE-months but still require adoption optimization work.

**Ongoing maintenance** is the hidden TCO multiplier. Passkey implementations require
continuous re-testing against new OS releases, browser updates and OEM-specific bugs.
Budget \~1.5 FTE/year for post-launch operations: rollout management, cross-platform
retesting, metadata updates and support training. On platforms requiring custom UI, add
1-2 additional FTEs for frontend maintenance alone.

**TCO Comparison at 500k MAU**

| **Platform**      | **Est. Platform Cost/mo** | **Passkey Build Effort** | **Ongoing Maintenance (FTE/yr)** | **Passkey Adoption Tools** |
| ----------------- | ------------------------- | ------------------------ | -------------------------------- | -------------------------- |
| **Auth0**         | $15k-30k                  | 15-25 FTE-months         | \~2 FTE                          | None (build yourself)      |
| **Clerk**         | \~$9k                     | 5-10 FTE-months          | \~1 FTE                          | Basic (toggle only)        |
| **Descope**       | Custom                    | 5-10 FTE-months          | \~1 FTE                          | Visual flow A/B testing    |
| **Ping Identity** | $3k-4k+                   | 20-30 FTE-months         | \~2.5 FTE                        | None (build yourself)      |
| **IBM Verify**    | Custom                    | 20-30 FTE-months         | \~2.5 FTE                        | None (build yourself)      |
| **Stytch**        | \~$4.9k (B2C)             | 10-15 FTE-months         | \~1.5 FTE                        | None (build yourself)      |
| **Ory**           | \~$10k/yr + custom        | 25-30 FTE-months         | \~3 FTE                          | None (build yourself)      |
| **Cognito**       | \~$7.3k-10k               | 15-20 FTE-months         | \~2 FTE                          | None (build yourself)      |
| **FusionAuth**    | \~$4k-5k                  | 20-25 FTE-months         | \~2.5 FTE                        | None (build yourself)      |
| **Firebase**      | \~$2.1k                   | N/A (no passkey support) | N/A                              | N/A                        |
| **Supabase**      | \~$599                    | N/A (no passkey support) | N/A                              | N/A                        |

## 5. Corbado solves the Passkey Orchestration Gap

Selecting a CIAM provider does not guarantee successful passwordless deployment. Native
passkey APIs from Auth0, Okta or [Cognito](https://www.corbado.com/blog/passkeys-amazon-cognito) routinely lead
to the 5-10% adoption fallacy. For a 500k MAU deployment, that means 450k+ users still on
passwords and SMS OTP - burning budget and leaving [phishing](https://www.corbado.com/glossary/phishing) risk
unaddressed.

Enterprises are turning to specialized passkey orchestration layers.
[Corbado](https://www.corbado.com) sits on top of any existing CIAM as an enhancer, not a
replacement.

### 5.1 Corbado Connect: Passkey Intelligence & Orchestration

![Corbado Connect Passkey Insights](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/corbado_connect_passkeys_insights_25db89765d.png)

Corbado is not a standalone CIAM. It is an enterprise-grade passkey layer that sits on top
of existing IDPs. No user database migrations or policy changes required. Corbado
intercepts the authentication event, orchestrates an optimized passwordless journey and
bridges the session back to the primary IDP.

Corbado's
[Passkey Intelligence](https://docs.corbado.com/corbado-connect/features/passkey-intelligence)
engine analyzes device hardware, OS, browser and
[password manager](https://www.corbado.com/blog/passkeys-vs-password-managers) presence when a user arrives. It
only prompts for passkey authentication when the hardware supports it, eliminating
dead-end WebAuthn prompts that cause the adoption fallacy.

By overlaying Corbado Connect, enterprises elevate passkey adoption to over eighty
percent, unlocking 60-90% [SMS OTP cost](https://www.corbado.com/blog/sms-cost-reduction-passkeys) savings. At
500k MAU, that can mean $50k-100k+ in annual SMS savings alone.

### 5.2 Corbado Observe: Passkey Analytics and Observability SDK

![Corbado Observe Funnel](https://s3.eu-central-1.amazonaws.com/corbado-cloud-staging-website-assets/corbado_observe_funnel_10907afac9.png)

Even organizations that build passkeys natively (without Corbado Connect) face a critical
blind spot: their existing logs and SIEM tools were not built for the device-dependent
nature of passkey authentication. Corbado Observe is a lightweight add-on SDK that
provides auth-native observability on top of any WebAuthn implementation, regardless of
which CIAM platform is used.

Corbado Observe delivers:

- **Authentication success rate by method** - compare passkeys vs. SMS OTP vs. password in
  one dashboard
- **Per-user debug timeline** - understand why a specific user failed to authenticate in
  minutes, not days
- **Passkey ROI dashboard** - prove [SMS cost](https://www.corbado.com/blog/sms-cost-reduction-passkeys) savings
  and conversion improvements to your CFO and [CISO](https://www.corbado.com/glossary/ciso)
- **Intelligent error classification** - distinguish user aborts from real failures vs.
  device incompatibilities, with automatic classification of 100+ error types
- **Cross-device journey tracking** - visualize multi-device passkey flows that standard
  logs cannot capture

Corbado Observe works with any WebAuthn server. No IDP migration required. Zero PII
architecture by design (UUID-only tracking, GDPR compliant). Organizations using it report
10x higher passkey adoption (from \~10% to 80%+) and debugging time reduced from 14 days
to 5 minutes.

For large-scale B2C deployments already committed to a CIAM vendor, Corbado Observe is the
fastest way to gain visibility into passkey performance and systematically drive adoption
without replacing anything in the existing stack.

## 6. Conclusion

The CIAM market of 2026 is defined by specialization. For large-scale B2C deployments at
500k MAU and beyond, the platform choice directly impacts authentication costs, security
posture and [conversion rates](https://www.corbado.com/blog/logins-impact-checkout-conversion).

For Fortune 500s already running a CIAM, do not migrate - optimize. The real ROI lies in
driving passkey adoption, not switching providers. Corbado bridges this gap: Corbado
Connect orchestrates high-converting passkey journeys on top of any IDP, while
[Corbado Observe](https://www.corbado.com/passkey-telemetry-sdk) provides the analytics to
track and optimize passkey performance. For a 500k MAU deployment, this is the difference
between a stalled pilot and a passwordless transformation.

## Frequently Asked Questions

### What is the difference between Auth0, Clerk and Descope for passkey adoption at scale?

All three support passkeys but differ significantly in adoption tooling. Auth0 provides
passkeys on all plans via Universal Login but offers no dedicated adoption features,
leaving organizations to build their own prompting logic. Descope offers visual
drag-and-drop passkey workflows with A/B testing, while Clerk reduces setup to a single
dashboard toggle with pre-built React components.

### How much does it cost to implement passkeys on a CIAM platform at 500k MAU?

Platform licensing at 500k MAU ranges from roughly USD 599 per month (Supabase, without
passkey support) to USD 15k-30k per month (Auth0). True total cost of ownership adds
significant engineering overhead: platforms requiring fully custom passkey UI, such as Ory
or Amazon Cognito, demand substantially more build effort than those with pre-built
components like Clerk or Descope. Enterprise buyers should also budget for ongoing
cross-platform retesting as browsers and operating systems release updates.

### Why do most organizations see passkey adoption stuck at low rates even after enabling it in their CIAM platform?

Generic CIAM passkey UIs blindly prompt all users regardless of device capability, causing
drop-offs and support tickets when hardware or browsers cannot complete WebAuthn flows.
The root cause is lack of device-aware prompting: no vendor in the 2026 comparison offers
intelligent device detection natively as standard. Specialized orchestration layers that
analyze device hardware, OS and browser before prompting can lift adoption above 80%, far
beyond what native CIAM implementations achieve alone.

### Which CIAM platforms support AI agent identity management and the Model Context Protocol in 2026?

Descope leads with its Agentic Identity Hub 2.0, treating AI agents as first-class
identities with OAuth 2.1, PKCE and tool-level scopes on MCP servers. Clerk redesigned its
APIs for agent identities and aligns with IETF specifications for OAuth-based agent
credentials. Stytch provides Web Bot Auth for cryptographic verification of benign AI
agents, while Ping Identity supports enterprise-grade M2M authentication via OAuth 2.1 in
its DaVinci orchestration engine.

### Is Amazon Cognito a good choice for passkey authentication at enterprise scale?

Amazon Cognito added native passkey support via Managed Login v2 in late 2024, but only on
the Essentials tier (roughly USD 7,350 per month at 500k MAU) and above, not the cheaper
Lite tier. While base pricing is competitive, Cognito requires significant engineering
overhead for custom UIs beyond the managed login flow. It provides no passkey adoption
tooling, meaning organizations typically see low adoption without additional investment in
analytics or orchestration.