Head-to-Head Comparison · Alternative to eM Client · 📬 email
eM Client vs Mailspring
Desktop email client for Mac, Windows, and Linux with unified inbox, read receipts, link tracking, send later, grammar checking, and contact enrichment. Here is how Mailspring ($0/mo open source) stacks up against eM Client ($15/mo) across cost, hosting, data privacy, and real-world trade-offs.
Mailspring is a verified GPL-3.0-licensed open-source replacement for eM Client. Switching from eM Client ($15/mo) saves $180/yr per solo seat, or $900/yr for a 5-person team. Deployment: Runs on Local.
The catch: Mailspring has a local index but no native PGP, secure-send workflow, mobile apps, or built-in AI summaries comparable to Canary.
Mailspring
$0.00/mo · GPL-3.0
eM Client vs Mailspring Specifications
facts verified 2026-11-07
| Dimension | eM Client (Paid) | Mailspring (Replacement) |
|---|---|---|
| Monthly Price | $15 / mo | $0 / mo |
| 1-Year Cost (1 seat) | $180 / yr | $0 / yr (Save $180) |
| 1-Year Cost (5 seats) | $900 / yr | $0 / yr (Save $900) |
| 1-Year Cost (10 seats) | $1,800 / yr | $0 / yr (Save $1,800) |
| Source & License | Proprietary SaaS | open source GPL-3.0 |
| Where It Runs | Vendor Cloud | Local (on your machine) |
| Platforms | Web / Cloud | desktopone-click install |
| GitHub Stars | — | ★ 18k (active nov 2026) |
Deep Dive: Switching from eM Client to Mailspring
Trade-offs, installation & data architecture
What you trade away
Mailspring has a local index but no native PGP, secure-send workflow, mobile apps, or built-in AI summaries comparable to Canary.
How to deploy Mailspring
Install the packaged desktop app for macOS, Windows, or Linux and create a Mailspring ID
What it takes to run
A Mailspring ID is mandatory, and there are no mobile clients
Where your data lives
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
Why fork Mailspring instead of vibe-coding a eM Client clone?
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.
eM Client vs Mailspring FAQ
Is Mailspring a good free alternative to eM Client?+
Yes. Mailspring is a verified open-source (GPL-3.0) replacement for eM Client. Desktop email client for Mac, Windows, and Linux with unified inbox, read receipts, link tracking, send later, grammar checking, and contact enrichment.
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.
How much do you save switching from eM Client to Mailspring?+
eM Client costs $15/mo ($180/yr) per seat, whereas Mailspring is $0/mo. Switching saves $180/yr for a solo user, $900/yr for a 5-person team, and $1,800/yr for a 10-person team.
How do I install or self-host Mailspring instead of eM Client?+
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
