--- title: Firebase vs Supabase slug: firebase-vs-supabase url: "https://toolweight.dev/vs/firebase-vs-supabase" category: convex-alternatives last_verified: 2026-07-20 license: CC-BY-4.0 --- # Firebase vs Supabase > Compared on the Convex alternatives field registry — 26 fields, all sourced. ## Where they differ | Field | Firebase | Supabase | | --- | --- | --- | | TS inference | ○ | ◐ | | Transactions | occ | mvcc | | Local-first sync | ◐ | ○ | | Optimistic writes | ● | ○ | | Full-text search | ○ | ● | | Hard limits | 1 MiB per document; about one sustained write per second per document; 500 operations per transaction; no joins. | Postgres limits apply: about 1 GB per field, no vendor row cap. The real ceilings are connection count and the compute tier you pay for. | | Cold start (ms) | 2 s | 250 ms | | Function timeout (ms) | 60 min | 2.5 min | | Exit cost | 5 | 2 | | Self-hostable | ○ | ● | | Bulk export | ◐ | ● | | Raw SQL | ○ | ● | | Schema changes | schemaless | sql-migrations | | Agent fit | 2 | 4 | | Pricing model | usage only (Blaze pay-as-you-go) | flat per org + compute + usage | | Entry price (/mo) | $0 /mo | $25 /mo | | GitHub stars | — | 90,000 | | Backing | big-tech | venture-backed | | Positioning | Google's platform for building and running app backends. | The Postgres development platform — the open-source Firebase alternative. | ## Every field | Field | Firebase | Supabase | | --- | --- | --- | | Reactivity | push | push | | TS inference | ○ | ◐ | | Transactions | occ | mvcc | | Local-first sync | ◐ | ○ | | Optimistic writes | ● | ○ | | Cron & scheduling | ● | ● | | File storage | ● | ● | | Vector search | ● | ● | | Full-text search | ○ | ● | | Auth | built-in | built-in | | Hard limits | 1 MiB per document; about one sustained write per second per document; 500 operations per transaction; no joins. | Postgres limits apply: about 1 GB per field, no vendor row cap. The real ceilings are connection count and the compute tier you pay for. | | Cold start (ms) | 2 s | 250 ms | | Function timeout (ms) | 60 min | 2.5 min | | Exit cost | 5 | 2 | | Self-hostable | ○ | ● | | Bulk export | ◐ | ● | | Raw SQL | ○ | ● | | Schema changes | schemaless | sql-migrations | | MCP server | ● | ● | | Agent fit | 2 | 4 | | Pricing model | usage only (Blaze pay-as-you-go) | flat per org + compute + usage | | Entry price (/mo) | $0 /mo | $25 /mo | | Egress metered | ● | ● | | GitHub stars | — | 90,000 | | Backing | big-tech | venture-backed | | Positioning | Google's platform for building and running app backends. | The Postgres development platform — the open-source Firebase alternative. | ## Each option ### Firebase — 51.2 / 100 Google's app platform: Firestore documents, auth, functions, deep mobile SDKs. Still the best offline story and the best mobile SDKs, and still the worst exit on this page by a distance. Reasonable for consumer apps that will never migrate; a liability for anything you expect to restructure later. - Consumer mobile apps where offline behaviour is the product - Teams already inside Google Cloud with the operational habits to match - Prototypes that will be thrown away rather than migrated ### Supabase — 74.6 / 100 Managed Postgres with auth, storage, realtime and edge functions around it. The default choice for anyone who wants managed convenience without giving up their database. The seams show — four services, RLS in SQL, codegen instead of inference — but pg_dump is a complete exit, and that buys a lot of friction. - Teams that need raw SQL, BI tooling or a third-party ORM against the same data - Anyone who wants a credible migration path off the platform from day one - Projects already comfortable with Postgres row-level security ## Sources | Tool | Field | Confidence | Verified | Source | | --- | --- | --- | --- | --- | | Firebase | Reactivity | Vendor-claimed | 2026-07-20 | https://firebase.google.com/docs/firestore/query-data/listen | | Firebase | Transactions | Vendor-claimed | 2026-07-20 | https://firebase.google.com/docs/firestore/manage-data/transactions | | Firebase | Local-first sync | Vendor-claimed | 2026-07-20 | https://firebase.google.com/docs/firestore/manage-data/enable-offline | | Firebase | Cron & scheduling | Vendor-claimed | 2026-07-20 | https://firebase.google.com/docs/functions/schedule-functions | | Firebase | File storage | Vendor-claimed | 2026-07-20 | https://firebase.google.com/docs/storage | | Firebase | Vector search | Vendor-claimed | 2026-07-20 | https://firebase.google.com/docs/firestore/vector-search | | Firebase | Full-text search | Vendor-claimed | 2026-07-20 | https://firebase.google.com/docs/firestore/solutions/search | | Firebase | Auth | Vendor-claimed | 2026-07-20 | https://firebase.google.com/docs/auth | | Firebase | Function timeout | Vendor-claimed | 2026-07-20 | https://firebase.google.com/docs/functions/quotas | | Firebase | Self-hostable | Vendor-claimed | 2026-07-20 | https://firebase.google.com/docs | | Firebase | MCP server | Vendor-claimed | 2026-07-20 | https://firebase.google.com/docs/cli/mcp-server | | Firebase | Pricing model | Vendor-claimed | 2026-07-20 | https://firebase.google.com/pricing | | Firebase | Entry price | Vendor-claimed | 2026-07-20 | https://firebase.google.com/pricing | | Firebase | Egress metered | Vendor-claimed | 2026-07-20 | https://firebase.google.com/pricing | | Firebase | Positioning | Vendor-claimed | 2026-07-20 | https://firebase.google.com | | Supabase | Reactivity | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/realtime | | Supabase | TS inference | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/api/rest/generating-types | | Supabase | Transactions | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/database | | Supabase | Cron & scheduling | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/cron | | Supabase | File storage | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/storage | | Supabase | Vector search | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/ai | | Supabase | Full-text search | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/database/full-text-search | | Supabase | Auth | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/auth | | Supabase | Self-hostable | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/self-hosting | | Supabase | Bulk export | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/database/connecting-to-postgres | | Supabase | Schema changes | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/deployment/database-migrations | | Supabase | MCP server | Vendor-claimed | 2026-07-20 | https://supabase.com/docs/guides/getting-started/mcp | | Supabase | Pricing model | Vendor-claimed | 2026-07-20 | https://supabase.com/pricing | | Supabase | Entry price | Vendor-claimed | 2026-07-20 | https://supabase.com/pricing | | Supabase | Egress metered | Vendor-claimed | 2026-07-20 | https://supabase.com/pricing | | Supabase | Positioning | Vendor-claimed | 2026-07-20 | https://supabase.com | See the full roster: [Convex alternatives](https://toolweight.dev/compare/convex-alternatives) — 11 tools. ## Licence and attribution Data from toolweight (https://toolweight.dev), licensed CC-BY-4.0. - Licence: [CC-BY-4.0](https://creativecommons.org/licenses/by/4.0/) - Canonical HTML: https://toolweight.dev/vs/firebase-vs-supabase - Machine-readable: https://toolweight.dev/vs/firebase-vs-supabase.md · https://toolweight.dev/api/v1 · https://toolweight.dev/mcp - toolweight takes no affiliate revenue and sells no placements. 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