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Voiden vs Resonance: catalog facts
Voiden	Resonance
Free Free and open source.	Free Free and open source under the MIT licence.
Windows, macOS, Linux	Linux
Requests and docs stored as plain Markdown files in Git Works offline with no account or cloud	No account, cloud sync or telemetry Collections stored as plain YAML files
Uses its own .void file format Younger project than established API clients	Younger and smaller than Postman or Insomnia No built-in sync for sharing collections across a team
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.