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eM Client vs Spike: catalog facts
eM Client	Spike
Freemium Free licence for personal, non-commercial use with up to two accounts; Personal from…	Freemium Free for individuals; paid plans add AI and team features.
Windows, macOS, Android, iOS	Windows, macOS, Android, iOS
Handles Gmail, Microsoft 365, Outlook, Exchange and plain IMAP without plugins Email, calendar, tasks, contacts, notes and chat in one polished window	Chat-style layout can make long threads easier to follow AI features aim to help with organizing and responding faster
No Linux version The free licence is capped at two accounts and forbids any commercial use	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
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 22, 2026

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