Best free Backend & Database for vibe coders
Summary
4 of 4 tracked Backend & Database tools have a free plan. Highest-scoring free option in our agent tests: Supabase (9.2/10). 2 of these free options have been tested so far.
Free-tier limits are copied from each tool's pricing page on the date shown. "Free" means a $0 plan exists, not that it fits every project. Last updated:
Tools with a free plan
| Tool | Free tier (as published) | Agent score | Checked |
|---|---|---|---|
| Supabase | Yes: 2 projects, 500 MB DB, 50K MAU; pauses after 1 week inactive | 9.2 | 2026-10-16 |
| Convex | Yes: 1M function calls, 0.5 GB DB | 8.7 | 2026-10-16 |
| Firebase | Yes (Spark): capped free quotas, no card | Not yet tested | 2026-10-16 |
| Neon | Yes: 100 CU-hours/project/mo, 1 GB storage/project (20 GB account total), 5 GB transfer/project, 10 branches/project | Not yet tested | 2026-10-16 |
Full Backend & Database ranking · All free-tool guides · Methodology
Scores come from our own tests and are never for sale; sponsored placements are always labelled. We may use affiliate links in future. Disclosure