--- title: Mailspring canonical: https://saasranked.com/software/mailspring/ category: Email Clients points: 65 rank: 6 of 10 facts_checked: 2026-10-08 --- # Mailspring Open-source desktop email client with a free plan that allows unlimited accounts. 65 points out of 100. #6 of 10 email clients. Vendor: Foundry 376. Website: https://getmailspring.com/ - The free version allows unlimited mail accounts, with a unified inbox, mail rules and templates [2]. - Pro costs $85 a year, or $8 a month, and lifts weekly limits on snooze and send later [1]. - Free snooze is capped at 15 conversations a week and send later at 5 messages a week [2]. - Adds Gmail and Microsoft accounts by signing in with them; POP3 and Exchange are not supported [3]. - The app is open source on GitHub, and the latest release listed there is 1.26.0 from 2 October 2026 [7][8]. Verdict: Mailspring suits people who want to read many IMAP, Gmail and Microsoft accounts in one free, open-source app [2][3][4]. Pro adds unlimited snooze and send later for $85 a year [1]. The catch: it has no POP3 or Exchange support, no mobile apps listed, and its full calendar is announced for later this year [4]. Best for: People with many IMAP, Gmail or Microsoft accounts who want a free, open-source app. ## Points | Criterion | Line | Value | Points | Note | |---|---|---|---|---| | Mail and accounts | Account types | IMAP, Gmail and Microsoft 365 sign-in | 6/12 | IMAP works; Google and Microsoft 365 accounts sign in with those providers. Docs say POP3 and Exchange protocols are unsupported [3]. | | Mail and accounts | Unified inbox | Yes | 4/4 | Homepage and free-plan article list a unified inbox [4][2]. | | Mail and accounts | Mail tools | Scheduled send, Snooze, Undo send, Templates | 8/8 | Send later and snooze have free weekly quotas and unlimited use on Pro; undo send and templates are listed [2][4][10]. | | Mail and accounts | Filters and rules | Yes | 3/3 | Rules can move mail to trash or folders and apply labels; they run only while the app is open [5]. | | Calendar and contacts | Built-in calendar | No | 0/6 | Homepage says a full-featured calendar is coming later this year, so we count it as not yet available [4]. | | Calendar and contacts | CalDAV and CardDAV | Yes | 3/3 | Homepage says Mailspring syncs directly via IMAP, CalDAV and CardDAV; release notes list CalDAV and CardDAV fixes [4][7]. | | Privacy and encryption | OpenPGP | Not published | 0/7 | Not published on the vendor's homepage, security page or documentation index [4][12][11]. | | Privacy and encryption | S/MIME | Not published | 0/6 | Not published on the vendor's homepage, security page or documentation index [4][12][11]. | | Privacy and encryption | Blocks tracking pixels | Not published | 0/4 | Vendor article says clients can turn off image loading; it does not say remote images are blocked by default [13]. | | Privacy and encryption | Open-source apps | Yes | 6/6 | Code is public on GitHub; homepage says MIT licence, while the repository page shows GPL-3.0. Either is open source [4][8]. | | Privacy and encryption | Mail stays on your device | Yes | 5/5 | Homepage says mail goes from your provider to your machine, not through the vendor's servers; opt-in features are the exception [4][6]. | | Systems and upkeep | Other systems | macOS, Linux | 4/10 | Downloads exist for Windows, Mac and Linux only; no iOS, Android or web app listed [9][4]. | | Systems and upkeep | Released in the last year | Yes | 5/5 | GitHub releases list version 1.26.0 dated 2 October 2026 [7]. | | Price | No ads in the app | Yes | 3/3 | The app is open source, which counts as no ads under our rule [8]. | | Price | Free plan | Yes | 6/6 | Free version with unlimited accounts and no time limit; Pro features have weekly quotas [2]. | | Price | Cost of a year | $0 | 12/12 | Free version has unlimited accounts, so a year costs $0; Pro is $85 a year [2][1]. | ## Plans | Plan | Price | Per month (USD) | |---|---|---| | Free | Free [2] | $0 | | Pro (yearly) | $85/year [1] | $7.08 | | Pro (monthly) | $8/month [1] | $8 | The yearly Pro price is $85, which is 11% below twelve monthly payments [1]. ## Strengths - Free version has unlimited accounts, a unified inbox, mail rules and templates [2]. - Gmail and Microsoft accounts are added by signing in with Google or Microsoft [3]. - Mail sync runs on your computer and does not go through the vendor's servers [4]. - Source code is public on GitHub [8]. ## Limits - POP3 and Exchange protocols are not supported [3]. - Free use of snooze and send later is capped each week [2]. - The download page lists only Windows, Mac and Linux apps [9]. - Rules run only while the app is open [5]. - A built-in calendar is announced as coming later, not available now [4]. ## Vendor claims (not scored) - Mailspring says it does not transmit, store or process your mail in the cloud [12]. ## Sources 1. [About Mailspring Pro subscriptions](http://www.getmailspring.com/docs/about-mailspring-pro-subscriptions), Mailspring, accessed 2026-10-08 2. [What's included in the free version?](http://www.getmailspring.com/docs/free-plan-limits), Mailspring, accessed 2026-10-08 3. [Supported email providers](http://www.getmailspring.com/docs/supported-email-providers), Mailspring, accessed 2026-10-08 4. [Mailspring home page](http://www.getmailspring.com/), Mailspring, accessed 2026-10-08 5. [Automate your inbox with mail rules](http://www.getmailspring.com/docs/automate-your-inbox-with-mail-rules), Mailspring, accessed 2026-10-08 6. [Mailspring privacy policy](http://www.getmailspring.com/privacy-policy), Mailspring, accessed 2026-10-08 7. [Mailspring releases](https://github.com/Foundry376/Mailspring/releases), GitHub, accessed 2026-10-08 8. [Foundry376/Mailspring](https://github.com/Foundry376/Mailspring), GitHub, accessed 2026-10-08 9. [Download Mailspring](http://www.getmailspring.com/download), Mailspring, accessed 2026-10-08 10. [Mailspring Pro](http://www.getmailspring.com/pro), Mailspring, accessed 2026-10-08 11. [Mailspring documentation](http://www.getmailspring.com/docs/), Mailspring, accessed 2026-10-08 12. [Mailspring security](http://www.getmailspring.com/security), Mailspring, accessed 2026-10-08 13. [Privacy and read receipts / link tracking](http://www.getmailspring.com/docs/privacy-with-read-receipt-and-link-tracking), Mailspring, accessed 2026-10-08