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Issuerd vs Zitadel

Zitadel offers multi-tenancy and SSO as open source, but Issuerd focuses on Keycloak compatibility and Rust performance.
IssuerdFast, Keycloak-compatible IAM with DPoP and CIBAZitadelOpen-source identity infrastructure with SSO and multi-tenancy

Which to pick

Pick Issuerd if you want…

  • Keycloak-compatible IAM in Rust
  • A free, open-source tool
  • Integrations with PostgreSQL, Redis or LDAP/Active Directory (on Issuerd's list, not Zitadel's)

Pick Zitadel if you want…

  • API-first multi-tenant identity infrastructure
  • Open-source multi-tenant IAM
  • Integrations with Google, Microsoft or GitHub (on Zitadel's list, not Issuerd's)

Side by side

What it is
Issuerd:Issuerd is an open-source, Keycloak-compatible IAM server written in Rust that provides OIDC/OAuth2, DPoP, CIBA and token exchange.
Zitadel:ZITADEL is an open-source, multi-tenant identity platform offering SSO, passwordless login and role-based access via APIs.
Best for
Issuerd:Keycloak-compatible IAM in Rust
Zitadel:API-first multi-tenant identity infrastructure
Who it’s for
Issuerd:Teams needing self-hosted, standards-compliant identity and access management.
Zitadel:Developers building consumer, B2B or employee applications needing authentication and authorization.
Pricing
Issuerd:Open source
Zitadel:Freemium
Plans
Issuerd:—
Zitadel:FREE US$0/Month · PRO US$100/Month per month
Open source
Issuerd:Yes, 70 GitHub stars
Zitadel:Yes, 15,146 GitHub stars
Works with
Issuerd:PostgreSQL, Redis, LDAP/Active Directory
Zitadel:Google, Microsoft, GitHub, REST API, gRPC

Issuerd features

  • OpenID Certified. Provides OpenID Certified support for 11 OP profiles with zero conformance failures.
  • Keycloak-compatible API. Implements Keycloak’s domain model and Admin REST API for drop-in compatibility.
  • DPoP & Token Exchange. Supports RFC 9449 DPoP sender-constrained tokens and RFC 8693 token exchange for agents.
  • CIBA Poll Mode. Enables human-in-the-loop step-up approvals via CIBA poll mode.
  • LDAP/AD Federation. Synchronizes users and groups from LDAP/Active Directory with fast import performance.
  • Single Binary Deployment. Runs as one self-contained Rust binary with Docker images, no JVM required.

Zitadel features

  • Hosted login UI. Customizable hosted login page with social and passwordless options.
  • API-first authentication. REST and gRPC APIs to embed login flows directly in applications.
  • Role-Based Access Control. Define permissions per role for fine-grained authorization.
  • Multi-tenant core. Create unlimited organizations and projects to isolate customers.
  • Extensible actions. Run workflow scripts on predefined events without deploying code.
  • Multi-factor & Passkeys. Enforce MFA or passwordless passkey authentication for stronger security.

Issuerd vs Zitadel FAQ

Is Issuerd or Zitadel free?+

Issuerd is free and open source. Zitadel has a free plan and paid plans.

Is Issuerd or Zitadel open source?+

Yes, both are open source: Issuerd (issuerd/issuerd on GitHub, Apache-2.0 license) and Zitadel (zitadel/zitadel on GitHub, AGPL-3.0 license).

Do Issuerd and Zitadel integrate with the same tools?+

Their integration lists don't overlap: Issuerd lists PostgreSQL, Redis and LDAP/Active Directory; Zitadel lists Google, Microsoft, GitHub, REST API and 1 more.

On DevHunt

Issuerd

1 upvote · Launching on DevHunt on Nov 3, 2026

Issuerd on DevHunt →

Zitadel

Listed by DevHunt

Zitadel on DevHunt →Zitadel alternatives

Based on each tool's website and DevHunt data. Details may change; check the official sites.