Head-to-Head Comparison · Alternative to Firebase · 🛠️ dev tools
Firebase vs undb
Build and manage custom databases with ease, create type-safe APIs, and develop applications quickly Here is how undb ($0/mo open source) stacks up against Firebase ($25/mo) across cost, hosting, data privacy, and real-world trade-offs.
undb is a verified Open Source-licensed open-source replacement for Firebase. Switching from Firebase ($25/mo) saves $300/yr per solo seat, or $1,500/yr for a 5-person team. Deployment: Runs on Self-host.
The catch: Requires self-hosting setup, updates, and server maintenance compared to managed Firebase.
Firebase vs undb Specifications
facts verified 2026-11-07
| Dimension | Firebase (Paid) | undb (Replacement) |
|---|---|---|
| Monthly Price | $25 / mo | $0 / mo |
| 1-Year Cost (1 seat) | $300 / yr | $0 / yr (Save $300) |
| 1-Year Cost (5 seats) | $1,500 / yr | $0 / yr (Save $1,500) |
| 1-Year Cost (10 seats) | $3,000 / yr | $0 / yr (Save $3,000) |
| Source & License | Proprietary SaaS | open source Open Source |
| Where It Runs | Vendor Cloud | Self-host (your server) |
| Platforms | Web / Cloud | webself-hosteddocker to self-host |
| GitHub Stars | — | ★ 3k (active nov 2026) |
Deep Dive: Switching from Firebase to undb
Trade-offs, installation & data architecture
What you trade away
Requires self-hosting setup, updates, and server maintenance compared to managed Firebase.
How to deploy undb
Clone https://github.com/undb-io/undb or deploy with Docker Compose
What it takes to run
Deploy via Docker or binary release from GitHub and configure environment variables.
Where your data lives
All application data and configuration live on your own server or local database.
Why fork undb instead of vibe-coding a Firebase clone?
Instead of paying recurring SaaS fees for Firebase or rebuilding it from scratch, deploy one of the 14 battle-tested open-source alternatives like Supabase.
Firebase vs undb FAQ
Is undb a good free alternative to Firebase?+
Yes. undb is a verified open-source (Open Source) replacement for Firebase. Build and manage custom databases with ease, create type-safe APIs, and develop applications quickly
What is the catch when switching from Firebase to undb?+
Requires self-hosting setup, updates, and server maintenance compared to managed Firebase.
How much do you save switching from Firebase to undb?+
Firebase costs $25/mo ($300/yr) per seat, whereas undb is $0/mo. Switching saves $300/yr for a solo user, $1,500/yr for a 5-person team, and $3,000/yr for a 10-person team.
How do I install or self-host undb instead of Firebase?+
Install: Clone https://github.com/undb-io/undb or deploy with Docker Compose. Setup: Deploy via Docker or binary release from GitHub and configure environment variables.
