| Attribute |  ClerkOther license |  ZitadelOpen source |
|---|---|---|
| Overview | ||
| Primary focus | Drop-in authentication and user management for web and mobile apps | Open-source IAM platform, free up to 100 daily active users, self-hostable core. |
| Deployment | Not specified | Self-hosted |
| Source model | Other license | Open source |
| Pricing model | freemium | open source |
| API available | Yes | Yes |
| Windows desktop | Not specified | Not specified |
| Mobile app | Not specified | Not specified |
| Overview | Clerk provides pre-built authentication UI, session management and user management for developers, via SDKs for React, Next.js and other frameworks, with a free Hobby tier and paid Pro/Business plans. | Zitadel is an open-source identity and access management platform with passwordless auth, multi-tenancy, and custom workflows. It's free up to 100 daily active users, with cloud Pro plans from $100/month and a self-hosted deployment option. |
| Explore further | ||
| Vendor website | Visit vendor ↗ | Visit vendor ↗ |
| ITHub profile | View full profile → | View full profile → |
ClerkOther licenseZitadelOpen sourceⓘ Confirm technical details and prices with each vendor before making a decision.