Best API Clients in 2026
Updated
In short: Postman is ranked #1 of 38 as of 3 October 2026, ahead of Apidog and Insomnia. The best-ranked option with a free plan is Apidog. The lowest first paid tier on this page is Bruno at $0.50/mo.
API clients help you send requests, inspect responses, and work with APIs across individual or shared workflows. Compared on API documentation and automated test runs, the entries also detail support for GraphQL, gRPC, and WebSocket, so you can check for the protocols relevant to your work. Available platforms and team workspaces offer further points to consider for your tools and collaboration needs. Postman, Apidog, and Insomnia are among the options shown. Review free-plan availability and paid-from pricing as you compare the listed capabilities with the testing and API work you need to do.
38 API clients ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
API clients, ranked on how quickly a newcomer can get going. 17 of the 25 on this page can be tried for free.
- 1 PostmanPaid from $9/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 2 ApidogPaid from $2.25/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 3 InsomniaPaid from $12/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 4 BrunoPaid from $0.50/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 5 TestfullyPaid from $1.17/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 6 KreyaPaid from $5/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 7 SoapUIFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 8 HoppscotchPaid from $6/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 9 OpenReqFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 10 Altair GraphQL ClientFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 11 FirecampPaid from $4,959/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 12 RequestlyPaid from $10/mo
- Free to practise on: not on record
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 13 httpYacFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 14 Thunder ClientPaid from $3/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 15 VeghaFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 16 ReadyAPI
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 17 RESTKFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 18 HTTPie
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: yes
- 19 grpcuiFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 20 Hurl
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: yes
- 21 Insomnium
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: yes
- 22 grpcurl
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 23 YaakPaid from $6.58/mo
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: yes
- 24 Chapar
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: yes
- 25 API Dash
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: yes
Is your platform 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 The Geeks Club?
Postman is ranked #1 of 38 with a score of 9.3. Apidog is second and Insomnia 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, Bruno has the lowest first paid tier we found: $0.50/mo.
How is this list ranked?
Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on. Paid placements never change a rank.