# Best CIAM Platforms: Top 5 Customer Identity Tools

Source: https://startwithidentity.com/rankings/best-ciam-platforms/
Last updated: 2026-10-17
License: content by Start with Identity. Cite the source URL.

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[CIAM](https://startwithidentity.com/guides/fundamentals/what-is-ciam/) platforms handle registration, login and identity for an application's external users: consumers (B2C) and business customers (B2B). This is the category-level view. If you already know your constraint, the segment rankings linked below will serve you better than the overall order.

## How we scored

Each pick is scored on our [10-dimension capability rubric](https://startwithidentity.com/methodology/), then adjusted for fit: developer experience, authentication breadth, B2B and B2C suitability, enterprise readiness, security, and pricing shape. A lower raw score can rank higher when the fit is sharper, which is why the order does not strictly follow the scores.

## Two shapes of product, not one

The five picks are not all the same kind of thing, and comparing them on a single feature grid misleads.

**Full platforms** own login end to end. [Auth0](https://startwithidentity.com/vendors/ciam/auth0/) covers B2C and B2B with the broadest SDK and protocol coverage and extensibility through Actions. [Stytch](https://startwithidentity.com/vendors/ciam/stytch/) ships passwordless-first API primitives with device fingerprinting and fraud signals. [MojoAuth](https://startwithidentity.com/vendors/ciam/mojoauth/) is passwordless-first with SSO bundled and can act as an OIDC and SAML identity provider.

**Overlays** add enterprise login to a product that already has auth. [WorkOS](https://startwithidentity.com/vendors/ciam/workos/) and [SSOJet](https://startwithidentity.com/vendors/ciam/ssojet/) sell SAML and OIDC SSO plus SCIM provisioning, priced per connection rather than per user.

## Pricing shape decides more than list price

Auth0 charges per monthly active user, with B2B and advanced MFA in higher tiers, so cost tracks user growth. WorkOS charges per SSO connection from the first one, starting at 125 dollars on a volume ladder, while its AuthKit login layer is free to 1 million monthly active users. SSOJet publishes a free tier with unlimited users and charges per enterprise connection. Stytch is usage-based with a free tier, and MojoAuth publishes low-cost plans. Model the shape against your growth before comparing numbers.

## Quick picker by scenario

- **One platform for consumers and business customers:** Auth0.
- **You have auth and need enterprise SSO and SCIM:** WorkOS or SSOJet; see [SSO and SCIM platforms](https://startwithidentity.com/rankings/best-sso-scim-platforms-b2b-saas/).
- **Passwordless and passkeys as the default:** Stytch or MojoAuth; see [passwordless CIAM providers](https://startwithidentity.com/rankings/best-passwordless-ciam-providers/).
- **Early-stage and cost-sensitive:** [CIAM for startups](https://startwithidentity.com/rankings/best-ciam-for-startups/).
- **Tens of millions of users:** [CIAM for high scale](https://startwithidentity.com/rankings/best-ciam-for-high-scale/).
- **Regulated, procurement-heavy buyer:** [CIAM for enterprises](https://startwithidentity.com/rankings/best-ciam-for-enterprises/) and [compliant CIAM platforms](https://startwithidentity.com/rankings/best-compliant-ciam-platforms/).

## Where to go next

For the evaluation process, read [how to choose a CIAM platform](https://startwithidentity.com/guides/buyer-guides/how-to-choose-a-ciam-platform/) and [CIAM pricing models explained](https://startwithidentity.com/articles/ciam-pricing-models-explained/). For workforce identity, see the [best IAM platforms](https://startwithidentity.com/rankings/best-iam-platforms/). For a vendor-neutral capability matrix across 48 CIAM platforms, see [CIAM Compass](https://guptadeepak.com/ciam-compass/).