7 tools15 comparisons

Best API Testing & Clients Tools(2026)

Test, debug, and document REST, GraphQL, and gRPC APIs. We compared 7tools so you don't have to.

Postman

From $14/mo

freemium

World's leading API platform for testing and collaboration

GUI HTTP clientAutomated collectionsMock servers

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Insomnia

From $0

freemium

API client for REST, GraphQL, and gRPC

REST/GraphQL/gRPC/WebSocketEnvironment variablesRequest chaining

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Hoppscotch

From $0

open-source

Open-source, web-based API testing tool

Browser-basedREST/GraphQL/WebSocket/SSE/MQTTOpen source (MIT)

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Bruno

From $0

open-source

Git-friendly open-source API client

File-based collections (Git-friendly)Offline-firstREST/GraphQL/SOAP

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HTTPie

From $0

open-source

Human-friendly HTTP client for the terminal

CLI HTTP clientJSON-friendly syntaxSyntax highlighting

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Swagger UI

From $0

open-source

Interactive API documentation from OpenAPI spec

OpenAPI renderingInteractive "Try it out"Auth support (OAuth/Bearer/Basic)

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RapidAPI (Paw)

From $17/mo

paid

Native macOS API client with advanced features

Native macOS appCode generation (30+ languages)Dynamic values

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Head-to-head

API Testing & Clients Comparisons

Postman vs Insomnia Postman vs Hoppscotch Postman vs Bruno Postman vs HTTPie Postman vs Swagger UI Insomnia vs Hoppscotch Insomnia vs Bruno Insomnia vs HTTPie Insomnia vs Swagger UI Hoppscotch vs Bruno Hoppscotch vs HTTPie Hoppscotch vs Swagger UI Bruno vs HTTPie Bruno vs Swagger UI HTTPie vs Swagger UI

FAQ

Frequently asked questions about api testing & clients tools

What is the best api testing & clients tool in 2026?＋

Postman is among the most-used api testing & clients tools — world's leading api platform for testing and collaboration. The best choice depends on your needs: compare all 7 options on pricing, features, and tradeoffs below. There is no single winner for every team.

Is there a free api testing & clients tool?＋

Yes — Hoppscotch is open-source ($0). Free and open source. Several other tools in this category also offer free tiers; check the pricing badges below.

How much do api testing & clients tools cost?＋

Pricing for api testing & clients tools in our list starts as low as $14/mo (Postman) and scales with usage and team size. Each tool's starting price is listed below — always verify current pricing on the vendor's site before buying.

How many api testing & clients tools are compared on DevVersus?＋

We compare 7 api testing & clients tools side by side, with 15 head-to-head comparisons. Each is reviewed on pricing, features, pros, and cons — independently, with no vendor bias.