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Requestly vs Header Editor: catalog facts
Requestly	Header Editor
Freemium Free to download, with flat per-user pricing for team and enterprise features.	Free Free and open source.
Windows, macOS, Linux, Browser extension, Command line	Browser extension
Collections stored as local JSON files that work with Git One-click import from Postman	Edits request and response headers Can modify response bodies
Team governance features are aimed at paid business plans The product has shifted focus from browser interception toward being an API client	Rule writing assumes some knowledge of HTTP
Downloadable app, Browser extension	Browser extension
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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