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8 Best APIs & Backend in 2026

See how our top 8 picks compare across the APIs & Backend we evaluated.

Explore what each does best, where it falls short, and why it earned a spot on our 2026 list.

ATAwesome Tools

Best APIs & Backend

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View KnockFavicon of Knock
Knock

Customer engagement infrastructure

View InsomniaFavicon of Insomnia
Insomnia

API client and design platform

View PostmanFavicon of Postman
Postman

API development and testing platform

View tRPCFavicon of tRPC
tRPC

End-to-end typesafe APIs with TypeScript

View SupabaseFavicon of Supabase
Supabase

Open-source Firebase alternative with PostgreSQL

View OpenAI APIFavicon of OpenAI API
OpenAI API

Access GPT-4 and other models via API

View Anthropic Claude APIFavicon of Anthropic Claude API
Anthropic Claude API

Enterprise AI API with safety and reliability

View ReplicateFavicon of Replicate
Replicate

Run AI models with a simple API

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