vioscale
Comparison

Firebase Authentication vs Zitadel

No leader: the top candidate Firebase Authentication has only 0.26 confidence (low), below the 0.35 needed to declare a winner. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

Firebase Authentication full profile →Zitadel full profile →
Machine formatsJSONMarkdownGraphQLor send Accept: application/json
Firebase Authentication66
Zitadel65
Score
Vioscale score
Firebase Authentication66 / 100low · 26%updating
Zitadel65 / 100low · 46%updating
Pricing
Free tier
Firebase Authentication✓
Zitadel✓
Model
Firebase Authenticationfreemium
Zitadelfreemium
Price level
Firebase Authenticationlow
Zitadelhigh
Transparent
Firebase Authentication✓
Zitadel✓
Integrations
Count
Firebase Authentication–
Zitadel12
Security
Disclosure policy
Firebase Authentication–
Zitadel✓
Gdpr
Firebase Authentication–
Zitadel✓
Vulnerabilities
Reliability
Sla pct
Firebase Authentication–
Zitadel99.99
Status page
Firebase Authentication✓
Zitadel✓
Adoption
Dependent repos
Firebase Authentication–
Zitadel0
Github stars
Firebase Authentication–
Zitadel14,862
Activity
Commits last 30d
Firebase Authentication–
Zitadel42
Release
Cadence days
Firebase Authentication–
Zitadel5
History
Firebase Authentication–
Zitadel20 items
License
Spdx
Firebase Authentication–
ZitadelAGPL-3.0
Language
Primary
Firebase Authentication–
ZitadelGo
Market
Availability

Capabilities

Feature-by-feature on the axes that matter for auth & identity software. “-” means undocumented, not absent.

Deployment
Hosting
Firebase AuthenticationCloud only
ZitadelCloud + self-hosted
Methods
Social login
Firebase Authentication✓
Zitadel✓
Passwordless
Firebase Authentication✓
Zitadel✓
Passkeys / WebAuthn
Firebase Authentication-
Zitadel✓
Multi-factor auth
Firebase Authentication-
Zitadel✓
Enterprise
SAML SSO
Firebase Authentication✓
Zitadel✓
SCIM provisioning
Firebase Authentication-
Zitadel✓
B2B / multi-tenancy
Firebase Authentication-
Zitadel✓
Standards
OpenID Connect provider
Firebase Authentication✓
Zitadel✓
Delivery
Hosted UI
Firebase AuthenticationBoth
ZitadelBoth
Access
RBAC
Firebase Authentication-
Zitadel✓
Licensing
Self-hostable OSS core
Firebase Authentication✗
Zitadel✓

What each one is

The product in its own terms, so the numbers below have context.

Firebase Authentication

A backend authentication service offering SDKs and UI components to integrate user sign-in across web and mobile platforms. Supports email, password, phone, and social login methods, with customizable UI options and pre-built components.

Independently observed

Zitadel

A multi-tenant, API-first identity and access management platform offering single sign-on, multi-factor authentication, passkeys, and complete audit trails. Available as a managed cloud service or self-hosted deployment, designed for developers building secure SaaS and B2B applications.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Firebase Authentication

HybridFree tier

Free Spark plan with 50K monthly active users. Blaze plan uses pay-as-you-go pricing.

  • SparkFree
  • Blaze-
as of verify ↗

Zitadel

from $100/moHybridFree tier

Free tier available. Pro plan from $100/month with 25,000 DAU included. Usage-based overage pricing for additional capacity.

  • FreeFree
    • 100 daily active users
    • 3 external identity providers
    • 5,000 management API requests
    • Community support
    • 1 management instance
  • Pro$100/month including 25,000 DAU and 500,000 API requests; overage pricing available
    • 25,000 daily active users
    • 500,000 management API requests
    • 3 external identity providers
    • Multifactor authentication
    • Passkeys/WebAuthn
    • +5 more
  • EnterpriseContact sales
    • Custom scaling
    • Custom compliance
    • Custom security questionnaires
    • Custom contract and MSA
    • Up to 99.99% availability SLA
    • +1 more
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Firebase Authentication✓
Zitadel✓
iOS
Firebase Authentication✓
Zitadel✗
Android
Firebase Authentication✓
Zitadel✗
macOS
Firebase Authentication✓
Zitadel✗
CLI
Firebase Authentication✓
Zitadel✗
Deployment
Cloud / SaaS
Firebase Authentication✓
Zitadel✓
Self-hosted
Firebase Authentication✗
Zitadel✓
Hybrid
Firebase Authentication✗
Zitadel✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Firebase Authentication

Not documented yet.

Zitadel

12 total
  • Google
  • Microsoft
  • GitHub
  • LDAP
  • SAML 2.0
  • SCIM 2.0
  • OpenID Connect
  • gRPC
  • connectRPC
  • REST API
  • Webhooks
  • Actions
Independently observed

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.