eM Client costs $15/mo.
These cost $0.
1 free alternatives to eM Client, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.
The top-rated free, open-source replacement for eM Client is Mailspring (GPL-3.0 Open Source). Switching a 5-person team saves up to $900/year compared to eM Client's $15/mo subscription.
The catch: Mailspring has a local index but no native PGP, secure-send workflow, mobile apps, or built-in AI summaries comparable to Canary.
eM Client vs Free Alternatives
Quick side-by-side comparison · $0/mo vs $15/mo
| Alternative | Type | License | Where It Runs | Stars | Head-to-Head |
|---|---|---|---|---|---|
| Mailspring | open source | GPL-3.0 | Local | ★ 18k | eM Client vs Mailspring → |
The picks
1 open source · ranked by fit
- 01
Mailspring
open sourceGPL-3.0Local18knov 2026Desktop email client for Mac, Windows, and Linux with unified inbox, read receipts, link tracking, send later, grammar checking, and contact enrichment.
The catch vs eM ClientMailspring has a local index but no native PGP, secure-send workflow, mobile apps, or built-in AI summaries comparable to Canary.
Install, platforms & data +
- platforms
- desktopone-click install
- install
- Install the packaged desktop app for macOS, Windows, or Linux and create a Mailspring ID
- setup
- A Mailspring ID is mandatory, and there are no mobile clients
- your data
- Mail is synchronized and indexed into a local database and cache; Mailspring's service stores account and feature metadata but says it does not store message content except for features such as shared threads
- checked
- 2026-11-07
eM Client Head-to-Head Comparisons (2027)
Side-by-side trade-off breakdowns · 1 free alternatives
Frequently Asked Questions
Direct answers · eM Client open-source replacements
What is the best free alternative to eM Client?+
The top free alternative to eM Client is Mailspring (open source, GPL-3.0). Desktop email client for Mac, Windows, and Linux with unified inbox, read receipts, link tracking, send later, grammar checking, and contact enrichment.
How much does switching from eM Client to a free alternative save?+
eM Client starts at $15/month per seat ($180/year). Switching a 5-person team to a free alternative like Mailspring saves $900 per year in software subscription fees.
Should I vibe-code or build my own eM Client clone from scratch?+
Our build verdict for eM Client is NO (use a free alternative, save the tokens). Instead of paying recurring SaaS fees for eM Client or rebuilding it from scratch, deploy one of the 1 battle-tested open-source alternatives like Mailspring.
What is the catch when switching from eM Client to Mailspring?+
Mailspring has a local index but no native PGP, secure-send workflow, mobile apps, or built-in AI summaries comparable to Canary.
