The best API Development
Every option ranked — open-source, self-hostable, and commercial — by our transparent Sovereignty Score, with honest trade-offs so you choose what fits you, not us.
Test and build APIs with clients that keep your collections in files you control.
L5Applications — layer 5 of the AI stack- 1
Bruno
Top pickOpen sourceA fast, git-native API client that stores collections as plain files.
Free and open-source core; optional Pro ($6/user/mo) and Ultimate ($11/user/mo) for advanced Git, SSO, and support · in our Postman comparison →
What is Bruno? →95sovereignty - 2
Hoppscotch
Open sourceAn open-source, browser-based API ecosystem you can self-host.
Free and open-source; free hosted cloud; optional paid cloud team tier; self-host for free · in our Postman comparison →
What is Hoppscotch? →90sovereignty - 3
API Dash
Open sourceA fully offline, cross-platform FOSS API client, mobile included.
Free and open-source · in our Postman comparison →
What is API Dash? →89sovereignty - 4
Insomnia
Open sourceA mature, multi-protocol API client with a fully local storage mode.
Free with a generous plan; paid tiers for unlimited collaboration, Git Sync, and org/SSO features · in our Postman comparison →
What is Insomnia? →82sovereignty
Is it free?
The free tier, its real limits and where you start paying — read from each vendor's own pricing page and dated.
Run these yourself
What each one actually needs — real RAM, honest running cost, and the setup time nobody quotes.
- Self-hosting Bruno 600 MB as an Electron app
- Self-hosting Hoppscotch 2 GB for the self-hosted stack
- Self-hosting API Dash Whatever your machine already has: it is an ordinary desktop app. The heavy part is building a current version from source, which needs the Flutter SDK and the platform toolchain (on Windows, full Visual Studio with the C++ desktop workload).
- Self-hosting Insomnia 700 MB as an Electron app
Replacing a specific tool?
Head-to-head comparisons for each popular api development product.
Straight head-to-heads
Two api development tools, side by side — verified facts and a plain verdict.