Best API Clients in 2026
Updated
In short: Postman is ranked #1 of 35 as of 3 October 2026, ahead of Apidog and Bruno. The best-ranked option with a free plan is Apidog. The lowest first paid tier on this page is Thunder Client at $3/mo.
When you work with APIs, a client can bring request sending and response inspection into one workflow. Compare API documentation and automated test runs, along with GraphQL, gRPC, and WebSocket support for the protocols you use. Available platforms can help you check compatibility with your setup; team workspaces are worth considering if you collaborate with others. The listed free-plan and paid-from details offer pricing points to compare. Postman, Apidog, and SoapUI are among the entries, with Insomnia and Bruno also included. Use these criteria to focus on the documentation, testing, platform, and collaboration features that matter for your API work.
35 API clients ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 Postman No phone app RecognisedPhone appDocumentedFree plan 8.1$9/mo GraphQL support: Yes
- 2 Apidog No phone app RecognisedPhone appDocumentedFree plan 8.0$9/mo GraphQL support: Yes
- 3 Bruno No phone app RecognisedPhone appDocumentedFree plan 7.9$6/mo GraphQL support: Yes
- 4 Insomnia No phone app RecognisedPhone appDocumentedFree plan 7.8$12/mo GraphQL support: Yes
- 5 SoapUI No phone app RecognisedPhone appDocumentedFree plan 7.7Free GraphQL support: Yes
- 6 Testfully No phone app RecognisedPhone appDocumentedFree plan 7.7$10/mo GraphQL support: YesgRPC support: NoWebSocket support: No
- 7 Hoppscotch No phone app RecognisedPhone appDocumentedFree plan 7.6$6/mo GraphQL support: Yes
- 8 Kreya No phone app RecognisedPhone appDocumentedFree plan 7.5$5/mo GraphQL support: Yes
- 9 OpenReq No phone app RecognisedPhone appDocumentedFree plan 7.5Free GraphQL support: YesgRPC support: NoWebSocket support: Yes
- 10 API Dash iPhone only RecognisedPhone appDocumentedFree plan 7.4 GraphQL support: YesgRPC support: NoWebSocket support: Yes
- 11 httpYac No phone app RecognisedPhone appDocumentedFree plan 7.3Free GraphQL support: YesgRPC support: YesWebSocket support: Yes
- 12 Vegha No phone app RecognisedPhone appDocumentedFree plan 7.2Free GraphQL support: YesgRPC support: YesWebSocket support: Yes
- 13 Thunder Client No phone app RecognisedPhone appDocumentedFree plan 7.1$3/mo
- 14 Requestly No phone app RecognisedPhone appDocumentedFree plan 7.0$10/mo GraphQL support: YesgRPC support: YesWebSocket support: Yes
- 15 Altair GraphQL Client No phone app RecognisedPhone appDocumentedFree plan 7.0Free GraphQL support: YesWebSocket support: Yes
- 16 curl iPhone + Android RecognisedPhone appDocumentedFree plan 7.0 WebSocket support: Yes
- 17 ReadyAPI No phone app RecognisedPhone appDocumentedFree plan 6.8 GraphQL support: Yes
- 18 RESTK No phone app RecognisedPhone appDocumentedFree plan 6.8Free GraphQL support: Yes
- 19 xh Android only RecognisedPhone appDocumentedFree plan 6.6
- 20 Yaak No phone app RecognisedPhone appDocumentedFree plan 6.2$6.58/mo GraphQL support: Yes
- 21 HTTPie No phone app RecognisedPhone appDocumentedFree plan 6.1 GraphQL support: Yes
- 22 Insomnium No phone app RecognisedPhone appDocumentedFree plan 6.0 GraphQL support: YesgRPC support: YesWebSocket support: Yes
- 23 Chapar No phone app RecognisedPhone appDocumentedFree plan 6.0 GraphQL support: YesgRPC support: YesWebSocket support: No
- 24 grpcui No phone app RecognisedPhone appDocumentedFree plan 6.0Free GraphQL support: NogRPC support: YesWebSocket support: No
- 25 WhoisJSON API No phone app RecognisedPhone appDocumentedFree plan 5.7$10/mo
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which API client is ranked first on Samsung Mobile US Press?
Postman is ranked #1 of 35 with a score of 8.1. Apidog is second and Bruno third.
How many of these have a free plan?
16 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Thunder Client has the lowest first paid tier we found: $3/mo.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.