API Design
Insomnia
Insomnia is an open-source desktop application for designing, debugging, testing, mocking, and documenting APIs across REST, GraphQL, gRPC, WebSockets, and related protocols.
$0 / monthTechZella Directory
Best API Testing Software in 2026
List of API Testing Software | Last updated: September 9, 2026
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Best API Testing Software
| # | Software / Tool | Best For | TechZella Score | User Rating | Pricing |
|---|---|---|---|---|---|
| 1 | Insomnia | Insomnia is an open-source desktop application for designing, debugging, testing, mocking, and… | 8.5/10 | — | $0 / $12 per user |
| 2 | Postman | Postman is an API platform for designing, testing, documenting, monitoring, and managing… | 8.5/10 | — | $0 / $9 |
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