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Meron vs Spike: catalog facts
Meron	Spike
Free Free and open source under the AGPL-3.0 licence.	Freemium Free for individuals; paid plans add AI and team features.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Android, iOS
Kanban board view for organising mail Chat-style threads in a unified inbox	Chat-style layout can make long threads easier to follow AI features aim to help with organizing and responding faster
Conversation-style layout differs from traditional mail clients Newer project with a smaller user base	Chat-style format is a matter of preference and not for everyone Advanced AI and team features require a paid plan
Downloadable app	Downloadable app
Open source	Closed source
License: AGPL-3.0-or-later	License not stated
No account 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 1, 2026	Official website Full listing and sources Checked September 22, 2026

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