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Eonvelope vs Open Archiver: catalog facts
Eonvelope	Open Archiver
Free Free and open source under the AGPL-3.0 licence.	Freemium Free to self-host; a paid Enterprise Edition adds extra features.
Web, Self-hosted	Web, Self-hosted
Supports IMAP, POP, Exchange and JMAP Thread detection and separate storage of attachments and correspondents	Imports from Google Workspace, Microsoft 365, IMAP, PST and mbox Searches inside attachments as well as message text
Requires running a Docker stack and accessing it over HTTPS Smaller project with a short track record	Some features are reserved for the paid Enterprise Edition Aimed at organisations, so heavier than personal archivers
Self-hosted	Self-hosted
Open source	Open source
License: AGPL-3.0	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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