Clerk vs StrongKey FIDO Server
Clerk
clerk.comStrongKey FIDO Server
strongkey.comSide by side
| Figure | Clerk | StrongKey FIDO Server |
|---|---|---|
| Price from | $1.67/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 4 | 3 |
| Spec score · Biometric Authentication Software | 8.6 (#4) | 8.3 (#11) |
| APIs | Clerk provides Frontend, Backend, and Platform HTTP APIs for client-side, backend, and workspace resource operations. | Web and mobile applications can integrate with SKFS through REST or SOAP web services. |
| Integrations | Clerk documents integrations with Convex, Firebase, Supabase, Shopify, Vercel Marketplace, and Google Analytics. | StrongKey lists out-of-the-box integration with Citrix ADC and Citrix Gateway, plus LDAP or Active Directory and PKI integration. |
| Support | Business includes priority support, while Enterprise includes a premium support SLA and dedicated Slack channel. | StrongKey offers integration and support services for FIDO testing, development, and production, PKI onboarding and provisioning, PCI DSS compliance, and customized support; purchased versions include maintenance and upgrades. |
Plans
StrongKey FIDO Server
- Community EditionFree
- Enterprise / hostedPriced on request
- Supported commercial versionsPriced on request
In their own words
Clerk
Clerk provides full-stack authentication and user management for applications, including Organizations and Billing. Prebuilt components cover sign-up, sign-in, and user profiles, while Frontend, Backend, and Platform HTTP APIs support client-side, backend, and workspace operations. Clerk Billing handles subscription billing and charges 0.7% of billing volume in addition to Stripe fees. Its free B2B offering includes 100 monthly retained organizations per app and up to 20 members per Organization. Listed integrations include Convex, Firebase, Supabase, Shopify, Vercel Marketplace, and Google Analytics. Security practices include account lockout, bot protection, rate limiting, breached-password detection, and MFA enforcement. Clerk lists SOC 2 Type 2 and HIPAA certifications; SOC 2 reports are available on Business and above, while a HIPAA BAA is available on Enterprise. Data is hosted on US infrastructure, with no regional data residency. Clerk is available on Android, iOS, web, APIs, and extensions, and provides an iOS SDK for native Apple apps. Hobby is free; Pro costs $20/mo billed annually, and Business costs $250 per year billed annually.
StrongKey FIDO Server
StrongKey FIDO Server has no write-up on Specifiction yet; its figures are above.