Best FastAPI Boilerplates and Starter Kits in 2026

FastAPI: Python's Fastest Growing Framework FastAPI is now the third most popular Python web framework after Django and Flask, with downloads growing 40% year-over-year in 2025. For SaaS, its automatic OpenAPI documentation, async-first design, and type hints that generate validation make it uniquely powerful for AI/ML-backed applications. In 2026, FastAPI's position as the default Python framework for AI services is locked in. Quick Comparison Starter Price Auth DB Frontend AI/ML Best For full-stack-fastapi-template Free Full PostgreSQL React ❌ Production full-stack fastapi-best-practices Free ❌ ❌ ❌ ❌ Architecture guide fastapi-users Free Auth only Multiple ❌ ❌ Auth library fastapi-postgres Free JWT PostgreSQL ❌ ❌ Backend API AuthX Free Full auth Multiple ❌ ❌ Auth + JWT The Starters full-stack-fastapi-template — Best Complete Starter Price: Free (MIT) | Creator: FastAPI team (Sebastián Ramírez) The official FastAPI full-stack template. FastAPI backend, React + TypeScript + Vite fronte