Head to head
Firebase Authentication vs WorkOS
As a authentication & identity API, Firebase Authentication rates higher on the APIbenchmarks Index, 87.6 to 86.5, a 1.1-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | Firebase Authentication | WorkOS |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 87.6 | 86.5 |
Specifications
| Firebase Authentication | WorkOS | |
|---|---|---|
| Best for | Mobile/web auth inside Firebase | Enterprise SSO & SCIM for B2B |
| Free tier | 50k MAU (basic email/social) | Up to 1M MAU on AuthKit; $125/connection for SSO/SCIM |
| Pricing | MAU-based (+ per-SMS) | Per connection / MAU-based |
| Official SDKs | 11 languages | 12 languages |
Is Firebase Authentication better than WorkOS?
On the APIbenchmarks Index, Firebase Authentication rates higher (87.6 vs 86.5). It leads on the four weighted criteria, but price is reported separately, so the best choice still depends on your budget.
Verdict in one line
Firebase Authentication leads by 1.1 points (87.6 vs 86.5) and wins 2 of 4 criteria; WorkOS wins 2.
Winner by criterion
| Criterion | Winner | ||
|---|---|---|---|
| Documentation & DX | 85 | 90 | |
| Reliability | 90 | 84 | |
| Ecosystem & SDKs | 88 | 82 | |
| Accessibility | 88 | 90 |
Choose Firebase Authentication if… / choose WorkOS if…
- →reliability matters most to you (90 vs 84)
- →ecosystem & sdks matters most to you (88 vs 82)
- →your use case matches its focus: mobile/web auth inside firebase
- →documentation & dx matters most to you (90 vs 85)
- →accessibility matters most to you (90 vs 88)
- →you need broad SDK coverage (12 official SDKs vs 11)
- →your use case matches its focus: enterprise sso & scim for b2b
Pricing side by side
- Model
- MAU-based (+ per-SMS)
- Free tier
- 50k MAU (basic email/social)
- No-cost tier (Spark / Blaze free allowance)$0
- Standard MAU (Blaze, 50,001–100,000)$0.0055 / MAU
- Standard MAU (100,001–1,000,000)$0.0046 / MAU
- Standard MAU (1,000,001–10,000,000)$0.0032 / MAU
- Enterprise SSO (SAML / OIDC)$0.015 / MAU
- Phone / SMS authentication~$0.01–$0.06 / SMS
- Model
- Per connection / MAU-based
- Free tier
- Up to 1M MAU on AuthKit; $125/connection for SSO/SCIM
- Pay as You GoUsage-based
- Annual Credits (Enterprise)Custom
- AuthKit (User Management)Free up to 1M MAUs, then $2,500/mo per additional 1M MAUs
- Single Sign-On / Directory Sync$125 per connection/mo (volume discounts to $50 at 101–200)
- Audit Logs$125/mo per SIEM stream + $99/mo per 1M events retained
- Radar (Bot & Fraud Protection) / Custom DomainRadar: free first 1k checks then $100/50k; Custom Domain $99/mo
Vendor-published pricing, verified 2026-06-27 (Firebase Authentication) and 2026-06-27 (WorkOS).
SDK and language coverage
Both · 0
None
Only Firebase Authentication · 11
iOS (Swift/Objective-C)Android (Kotlin/Java)Web (JavaScript)Flutter (Dart)UnityC++Admin SDK: Node.jsAdmin SDK: JavaAdmin SDK: PythonAdmin SDK: GoREST API
Only WorkOS · 12
Node.jsPythonRubyPHPPHP (Laravel)GoJavaKotlin.NETElixirAuthKit for React / Next.js / Remix / React RouterJavaScript (AuthKit)
Strengths and weaknesses
- +50,000 free monthly active users plus cheap graduated per-MAU pricing makes it very low cost for consumer apps
- +Extremely fast to integrate, working auth in a few lines of code, with an optional FirebaseUI drop-in widget
- +Broad first-party SDK coverage: iOS, Android, Web, Flutter, Unity, C++, and Admin SDKs for Node, Java, Python, Go
- –Limited customization of auth flows and hosted UI; the SMS template and FirebaseUI widget cannot be meaningfully changed
- –Significant vendor lock-in, historically no clean user-export API and the Firebase UID is hard to map back when migrating off
- –Enterprise features (SAML/OIDC, MFA, SLA, real support) require the paid Identity Platform tier
- +First 1 million AuthKit MAUs are free, one of the most generous free tiers in the auth market
- +Excellent, developer-friendly documentation repeatedly praised in G2 reviews
- +Admin Portal lets customers' IT admins self-serve their own SSO/SCIM setup, cutting vendor support load
- –Per-connection SSO/Directory Sync pricing ($125/connection/mo) scales with customer count, not revenue, the most common complaint
- –A single SSO customer can cost more than a SaaS vendor's own lowest-tier plan, blocking SSO-on-all-tiers strategies
- –Surrounding features, SDKs and docs described as having 'paper cuts', less mature than Auth0/Okta in places
Firebase Authentication vs WorkOS: questions
- Which has better documentation, Firebase Authentication or WorkOS?
- WorkOS scores higher on documentation and developer experience: 90 vs 85 out of 100.
- Which is more reliable, Firebase Authentication or WorkOS?
- Firebase Authentication scores higher on reliability: 90 vs 84 out of 100.
- Do Firebase Authentication and WorkOS have a free tier?
- Firebase Authentication: yes (50k MAU (basic email/social)). WorkOS: yes (Up to 1M MAU on AuthKit; $125/connection for SSO/SCIM).
- How are Firebase Authentication and WorkOS priced?
- Firebase Authentication: MAU-based (+ per-SMS). WorkOS: Per connection / MAU-based.
- Which has more official SDKs?
- WorkOS lists 12 official SDKs, Firebase Authentication lists 11.