See how Zitadel, the open-source identity and access management platform, compares on authentication, multi-tenancy, pricing plans, and developer APIs.
Zitadel is an open-source, API-first identity and access management platform that gives developers a way to add login, authentication, and multi-tenant identity infrastructure to their applications without building it from scratch.
The platform is developed by CAOS Ltd, a company founded in 2019 in St. Gallen, Switzerland, with an additional presence in San Francisco, California. Zitadel is positioned as an open-source alternative to identity platforms such as Auth0, Keycloak, and Firebase Authentication.
It can be run as a fully managed cloud service or self-hosted, giving teams flexibility over data residency and infrastructure control while retaining access to the same feature set.
Zitadel provides customizable hosted login pages along with gRPC and REST APIs, so developers can either use Zitadel's own login flow or build fully custom authentication experiences on top of its backend.
Authentication options include social logins, passwordless authentication, multi-factor authentication, and passkeys, while role-based access control governs what authenticated users and services are allowed to do within an application.
Its multi-tenancy model, built around organizations and projects, is designed for B2B software serving many customer tenants, and ZITADEL Actions let developers trigger custom logic after identity events like login or registration without deploying extra infrastructure. Service accounts are also supported for machine and workload identities.
Zitadel offers a free plan with unlimited organizations and users, up to 100 daily active users, three identity providers, and custom workflows, making it viable for small projects and testing.
The Pro plan costs 100 dollars per month and raises the limit to 25,000 daily active users, adds custom domain support, and includes a defined uptime guarantee with a one-hour response service level objective.
The Enterprise plan is custom-priced and includes unlimited daily active users, a dedicated technical account manager, custom support SLAs, a commercial license, and the choice between cloud-hosted or self-hosted deployment.
Zitadel is used to add authentication, authorization, and multi-tenant identity management to applications through hosted login pages and developer APIs.
Yes, Zitadel is open source and can be self-hosted, in addition to being offered as a managed cloud service.
Zitadel has a free plan for up to 100 daily active users, a Pro plan at 100 dollars per month for up to 25,000 daily active users, and a custom-priced Enterprise plan.
Zitadel is developed by CAOS Ltd, a company founded in 2019 in St. Gallen, Switzerland, with an additional office in San Francisco.
Zitadel supports passwords, social logins, multi-factor authentication, passwordless login, and passkeys.
Yes, Zitadel's organization and project structure is specifically designed to support multi-tenant B2B applications.
Zitadel is OpenID certified and complies with ISO 27001, GDPR, and AICPA SOC 2 Type II standards.
Yes, in addition to its managed cloud offering, Zitadel can be deployed and run entirely on an organization's own infrastructure.