Bvs
Better Auth vs Firebase
Side-by-side comparison of Better Auth and Firebase.
Quick summary
Better Auth — The most comprehensive authentication library. Better Auth is a framework-agnostic, open-source authentication library for TypeScript with built-in plugins.
Firebase — Google's app development platform. Firebase is Google's mobile and web app development platform offering realtime database, authentication, hosting, and serverless functions.
Feature comparison
| Feature | Better Auth | Firebase |
|---|---|---|
| Pricing model | Free | Freemium |
| Starting price | Free | Pay as you go |
| Free tier | Yes | Yes |
| Open source | Yes | No |
| MFA | Yes | — |
| SAML/SSO | Yes | — |
| Free Tier | Self-hosted | Spark plan (generous) |
| Self-hosted | Yes | No |
| Pre-built UI | No | — |
| Social Login | Yes | — |
| Organizations | Yes | — |
| Auth | — | Yes |
| Storage | — | Yes |
| Database | — | Firestore (NoSQL) |
| Realtime | — | Yes |
| Edge Functions | — | Yes |
| Row Level Security | — | No |
B
Better Auth
The most comprehensive authentication library
Pros
- Fully open source
- No vendor lock-in
- TypeScript-first
Cons
- You manage the infrastructure
- No hosted option
Firebase
Google's app development platform
Pros
- Battle-tested at massive scale
- Excellent mobile SDKs
- Deep Google Cloud integration
Cons
- Vendor lock-in with Firestore
- Costs can surprise you at scale
- NoSQL-only data model
Which should you choose?
Choose Better Auth if you value open source and want the option to self-host, and a free tier is important for your stage. Choose Firebase if a free tier is important for your stage.
Frequently asked questions
Which is better, Better Auth or Firebase?
There is no universal “better.” For most teams, Better Auth is the safer default because Better Auth is open source, which means you can self-host and avoid vendor lock-in. Firebase is proprietary. For edge cases, the comparison table above highlights where each tool wins.
Is Better Auth cheaper than Firebase?
Better Auth starts at Free, while Firebase starts at Pay as you go. Exact costs depend on usage — check both vendors' calculators before committing.
Can I migrate from Better Auth to Firebase?
Migration difficulty depends on how deeply Better Auth-specific features (APIs, SDK conventions, data schemas) are baked into your app. Most authentication migrations take days to weeks. Both vendors typically publish migration guides — check their docs.
Is Better Auth or Firebase open source?
Better Auth is open source; Firebase is a proprietary managed service.
Does Better Auth or Firebase have a free tier?
Both Better Auth and Firebase offer a free tier.
Which is best for startups and indie hackers?
Startups usually optimize for the lowest friction to ship and the cheapest possible free tier. The one with the most generous free tier here is Firebase. For production workloads, revisit the trade-offs in the feature table above.