--- source_url: "https://guptadeepak.com/ciam-compass/compare/auth0-vs-fusionauth/?utm_source=openai" title: "Auth0 vs FusionAuth: Which CIAM Wins in 2026?, CIAM Compass" mirrored_at: 2026-08-27T01:01:54.593Z host: guptadeepak.com cited_in_42a: true mirror_canonical: "https://index.42a.ai/guptadeepak.com/ciam-compass/compare/auth0-vs-fusionauth/index__q__utm_source_openai" --- > **Original source:** https://guptadeepak.com/ciam-compass/compare/auth0-vs-fusionauth/?utm_source=openai [Home](https://guptadeepak.com/ciam-compass/)/[Compare](https://guptadeepak.com/ciam-compass/compare/)/Auth0 vs FusionAuth Last verified 2026-08-19 ## When Auth0 wins - Largest SDK, sample-app, and community surface in CIAM - Auth0 FGA and packaged agent identity that FusionAuth does not match - Vendor-attested SOC 2, ISO, HIPAA, FedRAMP via Okta - No binary to patch; Actions instead of self-hosted lambdas ## When FusionAuth wins - MAU-independent cost, Community edition, Cloud or self-host with the same APIs - Single-binary ops that are materially lighter than Keycloak - You can start self-hosted and move to FusionAuth Cloud without changing vendors - Outbound lock-in is lower than Auth0 Actions (3/5 vs 4/5) ## Both win - Both support WebAuthn passkeys natively; orchestration is average on both (3/5) - Both support social login and B2B tenancy - Neither is the passkey-conversion leader ## Pricing comparison MAU band Auth0 FusionAuth 10,000 MAU $240/mo $100/mo 100,000 MAU $1,200/mo $400/mo 500,000 MAU $4,500/mo $1,500/mo 1,000,000 MAU $9,500/mo $3,000/mo ## Developer experience & lock-in Editorial 1–5 scores and migration effort, on the same axes for both. Lower migration effort is better (easier to adopt, less lock-in). Signal Auth0 FusionAuth DX overallDeveloper experience 5/5✓ 4/5 Docs qualityDocumentation 5/5 5/5 Passkey orchestrationPasskey / WebAuthn depth 3/5 3/5 Adoption effortMigrating in Moderate Moderate Lock-in (exit effort)Migrating out Involved Moderate✓ ## Enterprise readiness Computed across the enterprise pillars from the capability matrix. See the [enterprise-ready pillars](https://guptadeepak.com/ciam-compass/enterprise-ready/). Pillar Auth0 FusionAuth Overall Enterprise-ready · 100 Enterprise-ready · 88 Enterprise SSO 100 100 Directory sync (SCIM) 100✓ 65 Organizations & tenancy 100 100 RBAC & custom roles 100✓ 85 Audit logs & streaming 100 100 Compliance certifications 100✓ 70 Security posture 100✓ 85 ## Side-by-side capability matrix Authentication Capability Auth0 FusionAuth Password authentication ✓ Yes ✓ Yes Social login ✓ Yes ✓ Yes Magic links ✓ Yes ✓ Yes SMS OTP ✓ Yes ✓ Yes Email OTP ✓ Yes ✓ Yes TOTP (authenticator app) ✓ Yes ✓ Yes Push MFA ✓ Yes ✕ No WebAuthn / passkeys ✓ Yes ✓ Yes Biometric ✓ Yes ✓ Yes Hardware security keys ✓ Yes ✓ Yes SAML SSO ✓ Yes ✓ Yes OIDC SSO ✓ Yes ✓ Yes OAuth 2.0 SSO ✓ Yes ✓ Yes Enterprise federation ✓ Yes ✓ Yes Passwordless-only flows ✓ Yes ✓ Yes Adaptive MFA ✓ Yes ~ Partial Step-up auth ✓ Yes ✓ Yes Authorization Capability Auth0 FusionAuth RBAC ✓ Yes ✓ Yes ABAC ~ Partial ~ Partial ReBAC ✕ No ✕ No FGA engine ✓ Yes ✕ No API authorization ✓ Yes ✓ Yes Fine-grained permissions ✓ Yes ✓ Yes User management Capability Auth0 FusionAuth Self-service registration ✓ Yes ✓ Yes Progressive profiling ✓ Yes ✓ Yes Self-service account ✓ Yes ✓ Yes Bulk user import ✓ Yes ✓ Yes Admin user search ✓ Yes ✓ Yes Custom user metadata ✓ Yes ✓ Yes Organizations / tenants ✓ Yes ✓ Yes Multi-tenancy ✓ Yes ✓ Yes SCIM provisioning ✓ Yes ~ Partial Developer experience Capability Auth0 FusionAuth REST API ✓ Yes ✓ Yes GraphQL API ✕ No ✕ No SDKs 16 listed 14 listed CLI ✓ Yes ✓ Yes Terraform provider ✓ Yes ✓ Yes Local emulator ✕ No ✓ Yes Extension model Actions (Node.js serverless) Lambda functions (JavaScript, in-product) + webhooks Security Capability Auth0 FusionAuth Bot detection ✓ Yes ~ Partial Breached password detection ✓ Yes ✓ Yes Brute-force protection ✓ Yes ✓ Yes Anomaly detection ✓ Yes ~ Partial Log streams ✓ Yes ✓ Yes Audit logs ✓ Yes ✓ Yes GDPR data export ✓ Yes ✓ Yes PII minimization ~ Partial ~ Partial Post-quantum roadmap ✕ No ✕ No Agentic identity Capability Auth0 FusionAuth MCP support ✓ Yes ✕ No OAuth 2.1 ✓ Yes ✓ Yes Dynamic client registration ✓ Yes ✓ Yes Agent vs human token separation ✓ Yes ✕ No Web Bot Auth ✕ No ✕ No Compliance Capability Auth0 FusionAuth SOC 2 Type II ✓ Yes ✓ Yes ISO 27001 ✓ Yes ✕ No ISO 27018 ✓ Yes ✕ No HIPAA ✓ Yes ✓ Yes PCI DSS Level 1 (with config) ✕ No GDPR ✓ Yes ✓ Yes CCPA ✓ Yes ✓ Yes FedRAMP High (via Okta) ✕ No EU data residency ✓ Yes ✓ Yes Consent & privacy Capability Auth0 FusionAuth Consent management ~ Partial ~ Partial Preference center ~ Partial ~ Partial Purpose-specific consent ✕ No ~ Partial Integrates with CMPs 2 listed n/a Scalability & regions Capability Auth0 FusionAuth Multi-region deployment ✓ Yes ~ Partial Data residency control ✓ Yes ✓ Yes Proven at high scale (1M+ MAU) ✓ Yes ~ Partial Enterprise operations Capability Auth0 FusionAuth Password-hash import ✓ Yes ✓ Yes Lazy / just-in-time migration ✓ Yes ~ Partial Account linking & dedup ✓ Yes ~ Partial Custom domains per brand ✓ Yes ✓ Yes Per-brand theming of all flows ✓ Yes ~ Partial Per-brand consent partitioning ~ Partial ✕ No Deletion webhooks / cascade ✓ Yes ~ Partial Event streaming / webhooks ✓ Yes ~ Partial Documented rate limits ✓ Yes ~ Partial ## FAQ Is FusionAuth open source? Community is free under a custom Apache-2.0-style license, not OSI-certified. For most teams that is functionally equivalent. For procurement that requires OSI, use Keycloak or Ory. Do not pick FusionAuth hoping it is Keycloak with a prettier admin UI and an OSI stamp. Which is cheaper at 500k MAU? FusionAuth. Compass estimates about $1,500/month at 500k MAU and about $3,000 at 1M, versus Auth0 at about $4,500 and $9,500. Self-host operating cost (database, HA, a fraction of an FTE) is on you. At consumer scale the Auth0 invoice is still the larger number. Can FusionAuth replace Auth0 Organizations? FusionAuth Tenants cover most B2B SaaS tenancy. Deep enterprise SSO catalogs and FGA still favor Auth0. If the leave-reason is the bill, FusionAuth is the honest landing. If the leave-reason is federation breadth, it is not. Should I switch from Auth0 to FusionAuth? Switch if per-MAU cost is why Auth0 failed, and you will own a binary or pay FusionAuth Cloud. Do not switch for agent identity, FedRAMP, or FGA. Hash import is tractable. Actions rewrites are the real work. Budget 60 to 90 days. Auth0 sells velocity and a PDF from a compliance team. [FusionAuth](https://guptadeepak.com/ciam-compass/vendors/fusionauth/) sells a binary and a bill that does not track MAU. Both speak OIDC. Only one of them wants to be your IdP vendor in five years of consumer scale. Choose **[Auth0](https://guptadeepak.com/ciam-compass/vendors/auth0/)** when [FGA](https://guptadeepak.com/ciam-compass/glossary/fga/), agent SKUs, or FedRAMP are on the sheet, and the team should not run auth. Choose **FusionAuth** when the Auth0 invoice is the meeting, you want a self-host option that is not Keycloak, and you can live without [Zanzibar](https://guptadeepak.com/ciam-compass/glossary/zanzibar/). If you need [Keycloak](https://guptadeepak.com/ciam-compass/vendors/keycloak/)'s ecosystem and OSI license, go there. If you need B2B SSO without running anything, go to WorkOS. Profiles: [Auth0](https://guptadeepak.com/ciam-compass/vendors/auth0/), [FusionAuth](https://guptadeepak.com/ciam-compass/vendors/fusionauth/). Adjacent: [Keycloak vs FusionAuth](https://guptadeepak.com/ciam-compass/compare/keycloak-vs-fusionauth/). ## Related comparisons - [Auth0 vs Akamai Identity Cloud](https://guptadeepak.com/ciam-compass/compare/auth0-vs-akamai-identity-cloud/) - [Auth0 vs Authentik](https://guptadeepak.com/ciam-compass/compare/auth0-vs-authentik/) - [Auth0 vs Authress](https://guptadeepak.com/ciam-compass/compare/auth0-vs-authress/) - [Auth0 vs BetterAuth](https://guptadeepak.com/ciam-compass/compare/auth0-vs-betterauth/) - [Auth0 vs Beyond Identity](https://guptadeepak.com/ciam-compass/compare/auth0-vs-beyond-identity/) - [Auth0 vs Clerk](https://guptadeepak.com/ciam-compass/compare/auth0-vs-clerk/) ## Where to next - [ToolVendor selector](https://guptadeepak.com/ciam-compass/tools/vendor-selector/) - [ToolMaturity assessment](https://guptadeepak.com/ciam-compass/tools/maturity-assessment/) - [ToolBuild vs buy](https://guptadeepak.com/ciam-compass/tools/build-vs-buy/)