Choose Clerk if you need
- Web. We haven't found it on FusionAuth's website.
At a glance
- Both have a free plan.
- Clerk's lowest paid plan is Pro at $25, as of October 19, 2026.
- FusionAuth's lowest paid plan is Starter at $162 per month at 1,000 MAUs, billed annually, as of October 20, 2026.
- Both are available on iOS, Android and API.
- Only Clerk lists Web.
- Only FusionAuth lists Docker and Kubernetes.
- They list no integrations in common.
- Both list SOC 2, GDPR, HIPAA and SSO.
- Only FusionAuth lists ISO 27001.
- Both have a public API.
- FusionAuth can be self-hosted. We haven't confirmed that for Clerk.
From each tool's own website, checked on the dates below, and from published reviews.
Which to choose
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.
Choose FusionAuth if you need
- Docker or Kubernetes. We haven't found them on Clerk's website.
- Integration with Google, Apple or Facebook. We haven't found them on Clerk's website.
- ISO 27001. We haven't found it on Clerk's website.
Clerk
Nobody has reviewed Clerk yet. Its rating shows once it has 3 reviews.
Review Clerk
FusionAuth
Nobody has reviewed FusionAuth yet. Its rating shows once it has 3 reviews.
Review FusionAuthThe facts
- What it does
- ClerkAuthentication and user management for React, Next.js, Remix and the modern web
- FusionAuthThe CIAM platform built to deploy anywhere, give you total control, and scale across any modern architecture
- Free plan
- ClerkYes
- FusionAuthYes
- Pricing
- ClerkNot confirmed
- FusionAuthNot confirmed
- Paid plans from
What they share
From the platforms and integrations each website lists.
Platforms
Both
- iOS
- Android
- API
Only Clerk
- Web
Only FusionAuth
- Docker
- Kubernetes
Integrations
BothNone in common
Only Clerk
- Supabase
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between Clerk and FusionAuth yet.
Used either of them?
Your review makes this comparison better for the next person. Review Clerk or review FusionAuth.