Head to head
FusionAuth vs Clerk
Both platforms are scored with the same methodology and the same category rubric. Nothing on this page is influenced by advertising.
49/100 | 53/100Higher score | |
|---|---|---|
| Category rank | #6 | #3 |
| Confidence | High confidence | Medium confidence |
| External Reputation | 74 | 70 |
| AI Authority | 30 | 63 |
| Web Authority | 23 | 14 |
| Expert Assessment | 62 | 52 |
| TOP10 User Score | — | — |
| Pricing | Starter from $162/mo (billed annually, at the page default of 1,000 MAUs), community-forum support only, basic hosting included · free tier: Community — free, unlimited, self-hosted with core authentication features and community support (forums, Slack, GitHub); passkeys/WebAuthn and biometrics reportedly require registering a free Community licence | From $25/mo (Pro) — vendor-domain explainer, not verified on the billing page · free tier: Free "Hobby" plan covering 50,000 monthly retained users; all features free in development mode |
| Pricing model | Subscription (MAU-based tiers; free self-hosted Community edition) | Subscription (metered on monthly retained users) |
| Best for | Engineering-led B2C or mid-market B2B SaaS teams that need data sovereignty or on-prem CIAM, are comfortable with OAuth2/OIDC concepts, and want an API-first platform they can start free and later move to managed hosting without switching vendors. | React/Next.js product teams shipping B2B SaaS or paid B2C below roughly 50k retained users, who value time-to-launch over auth-layer control, have engineers able to work around component styling limits, and whose incident tolerance can absorb slow vendor support. |
| Avoid if | You lack dedicated engineering capacity for identity work, require a truly open-source core, need 24x7 support or an SLA on a small budget, need cheap SCIM provisioning, or require FedRAMP or Zanzibar-style fine-grained authorization. | You run a non-JavaScript stack, need deep domain-specific authorization, operate a free/ad-supported or high-churn consumer app at scale, need Clerk to be your billing system today, or carry hard support SLAs and regulated uptime obligations. |
| Markets | SMB, Mid-Market, Enterprise, Developers, Startups | SMB, Mid-Market, B2B SaaS, Startups |
| Founded | — | — |
| Headquarters | — | — |
A higher TOP SCORE means more of the evidence favours that platform on this methodology — it is not a recommendation, and it does not account for your specific requirements. Advertisers are never declared the winner of a comparison.