Insomnia

An AI-native API collaboration platform with native Kong Konnect integration.

Ranked #2 in Open-source API testing tools, and on 1 more ranking.

Insomnia is a collaborative API development platform supporting REST, GraphQL, gRPC, and WebSocket protocols. It enables developers to design, mock, test, and debug APIs with AI-native capabilities.

Official website

At a glance

Best for

API developers

From Insomnia's own website.

Company facts

Social profiles

Facilities and features

Its website also mentions:

Published pricing
Free plan
API
Integrations
Single sign-on
SOC 2

What stands out

The product offers unlimited projects and collection runs on its free tier.

“Git Sync for 3 Native Git/Filesystem CLI MCP Clients Unlimited Projects Unlimited collection runner”Insomnia, own website

Insomnia allows users to work entirely offline using local storage for collections.

“Work entirely offline with local storage for collections, designs, and tests, backed up and recoverable on your machine.”Insomnia, own website

How it ranks

Insomnia is ranked 2nd of 10 in Open-source API testing tools (Lister Score 92.0) and 7th of 10 in Best API testing tools (Lister Score 92.0).

#2 in Open-source API testing tools · Lister Score 92.0

Allows users to work entirely offline using local storage for collections.

How the score is made up: fit to this ranking's criteria 40; evidence on its own site 20; how complete its published information is 16; buying information on its own site 16.

“Automated API testing at Scale Run unlimited collection tests with pre- and post-request scripting to build sophisticated workflows,”Insomnia, own website

“Open-source and free tier: Git Sync for 3 Native Git/Filesystem CLI MCP Clients Unlimited Projects Unlimited collection runner”Insomnia, own website

Rank	Open-source API testing tools	Score
1	Karate DSL	96.0
2	Insomnia	92.0
3	BrowserStack	90.0
4	Kong	90.0
5	Bruno	88.0
6	SoapUI	88.0
7	Hoppscotch	80.0
8	HTTPie	80.0
9	Cubenest	78.0
10	Rest-Assured	74.0

#7 in Best API testing tools · Lister Score 92.0

Offers unlimited projects and collection runs on its free tier.

How the score is made up: fit to this ranking's criteria 40; evidence on its own site 20; how complete its published information is 16; buying information on its own site 16.

“Automated API testing at Scale Run unlimited collection tests with pre- and post-request scripting to build sophisticated workflows,”Insomnia, own website