Mailspring
Mailspring: A capable open desktop client with unified inboxes and optional productivity features. Ranked #8 of 142 in Email Clients by our editors (8.6/10); pricing: Free plan; best for free desktop users wanting a capable open client.
At a glance
- Editor score8.6 / 10
- PricingFree plan
- Best forFree desktop users wanting a capable open client
- Free planYes
- App coverageDesktop
- Facts checked21 Sep 2026
Where it wins
- Unified inbox and search across connected email accounts
- Works on macOS, Windows, and Linux with offline access
- Pro adds scheduling, tracking, reminders, templates, and snoozing
Where it doesn't
- Advanced productivity features require a paid Pro plan
- Focused on desktop rather than mobile email access
- Full-featured calendar support is still planned
Our verdict on Mailspring
Mailspring is a native desktop email client for people managing multiple accounts across macOS, Windows, or Linux. Its free plan covers core email functionality, multi-account support, and a unified inbox, while also providing advanced search, custom signatures, spell and grammar checking, offline reading and composing, and calendar invitation details with RSVP actions. It suits users who want one open-source desktop application for several personal or work inboxes.
Pricing is straightforward. The Free plan includes the core client, multi-account support, and unified inbox access. Mailspring Pro costs $8 per month and adds read receipts, link tracking, send later, follow-up reminders, templates, and message snoozing. Mailspring Pro Annual costs $85 per year and includes unlimited use of Pro features with no limit on connected email accounts. The free tier is a credible choice for standard email management; the paid plans are aimed at users who regularly need workflow features around timing, follow-up, and message visibility.
Its ecosystem coverage is broad for a desktop client: connections include Gmail, iCloud, Microsoft Office 365, FastMail, Outlook.com, Yahoo, IMAP/SMTP, CalDAV, and CardDAV. Scheduled sending, queued delivery, offline access, quick replies, and calendar invitation actions give it useful productivity depth without replacing a full calendar application. Users seeking a desktop-first, multi-account inbox should find the feature mix well aligned. Those who need mobile apps, a full-featured calendar today, or advanced features without a subscription should consider a different email client.
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Mailspring pricing
All 2 Mailspring plans and prices →
Mailspring fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| App coverage | Desktop |
| Account limit | Not verified |
| Unified inbox | Yes |
| Offline access | Yes |
| Scheduled sending | Yes |
| Calendar tools | No |
| Money-back guarantee | 14 days |
| Deployment | Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Email, Community, Docs |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Integrations | 12 integrations: Gmail, Google Workspace, Microsoft 365, Office 365, Outlook.com, Yahoo … |
| Pricing | Free plan (source) |
| Website | getmailspring.com |
| Facts checked | 21 Sep 2026 |
Mailspring integrations
Mailspring lists 12 integrations on its own site.
- Gmail
- Google Workspace
- Microsoft 365
- Office 365
- Outlook.com
- Yahoo
- iCloud
- FastMail
- GMX
- Yandex
- ProtonMail via Proton Mail Bridge
- IMAP/SMTP
Alternatives to Mailspring
- Mozilla ThunderbirdA capable free client for multi-account email, offline access, and desktop productivity tools.9.4
- Zoho MailA flexible hosted email service with free access, migration tools, and Zoho collaboration options.9.2
- Apple MailA capable Apple-focused email client with unified inboxes, scheduling, privacy controls, and AI assistance.9.1
See all Mailspring alternatives →
Mailspring vs the competition
- Mailspring vs Mozilla Thunderbird
- Mailspring vs Zoho Mail
- Mailspring vs Apple Mail
- Mailspring vs Spark Mail
- Mailspring vs KMail
- Mailspring vs eM Client
Compare Mailspring with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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