FastAPI vs Flask: Vergleich

FastAPI vs Flask
Fakt	FastAPI	Flask
Sprache	Python	Python
Lizenz	MIT	BSD-3-Clause
Sterne	103k	75k
Neuestes Release	0.142.2	3.1.3
Letzter Push	2026-10-06	2026-09-08
Release-Rhythmus	etwa 1 Tag zwischen Releases	etwa 182 Tage zwischen Releases
Aktive Mitwirkende	8 Commit-Autoren auf dem Standard-Branch in den letzten 90 Tagen	3 Commit-Autoren auf dem Standard-Branch in den letzten 90 Tagen
Hinweise	keine	keine

Wie sie zusammenhängen

FastAPI ersetzt Flask. Alternativen zu Flask →
Vollwertiger ErsatzAsync, with type hints driving validation and OpenAPI docs.

0.142.22026-09-30🐛 Allow startup when automatic OpenTelemetry configuration fails. PR #16418 by @tiangolo.
0.142.12026-09-29🐛 Fix repeated endpoint wrapping in included routers. PR #16414 by @tiangolo.
0.142.02026-09-29✨ Add native OpenTelemetry support. PR #16403 by @tiangolo.
0.141.12026-07-29🐛 Fix support for background tasks and headers from dependencies in app.frontend(). PR #16105 by @tiangolo.
0.141.02026-07-29✨ Add app.frontend(check_dir="auto"), to make local development more convenient with fastapi dev. PR #16102 by @tiangol…

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.

✓ signiert Das neueste Release, 0.142.2, trägt eine Signatur, die GitHub geprüft hat.

Der Sicherheitsbericht wird geladen

✓ signiert Das neueste Release, 3.1.3, trägt eine Signatur, die GitHub geprüft hat.

Der Sicherheitsbericht wird geladen