compare
Flask vs Starlette
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Flask | Starlette |
|---|---|---|
| Language | Python | Python |
| Licence | BSD-3-Clause | BSD-3-Clause |
| Stars | 75k | 13k |
| Latest | 3.1.3 | 1.7.0 |
| Last push | 2026-09-08 | 2026-10-06 |
| Release cadence | about 182 days between releases | about 2 days between releases |
| Active contributors | 3 commit authors on the default branch in the last 90 days | 30 commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Starlette replaces Flask. Alternatives to Flask →
PartialA lightweight ASGI toolkit with routing, middleware and WebSockets, the base FastAPI is built on.
Flask
- 3.1.32026-02-19This is the Flask 3.1.3 security fix release, which fixes a security issue but does not otherwise change behavior and s…
- 3.1.22025-08-19This is the Flask 3.1.2 fix release, which fixes bugs but does not otherwise change behavior and should not result in b…
- 3.1.12025-05-13This is the Flask 3.1.1 fix release, which fixes bugs but does not otherwise change behavior and should not result in b…
- 3.1.02024-11-13This is the Flask 3.1.0 feature release. A feature release may include new features, remove previously deprecated code,…
- 3.0.32024-04-07This is a fix release for the 3.0.x feature branch.
Flask
✓ signed The latest release, 3.1.3, carries a signature GitHub verified.
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Starlette
✓ signed The latest release, 1.7.0, carries a signature GitHub verified.
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