--- title: Spark Mail canonical: https://saasranked.com/software/spark-mail/ category: Email Clients points: 56 rank: 9 of 10 facts_checked: 2026-10-08 --- # Spark Mail Cross-platform email app with a free plan that has unlimited accounts and a calendar. 56 points out of 100. #9 of 10 email clients. Vendor: Readdle. Website: https://sparkmailapp.com/ - The Free plan allows unlimited email accounts and includes a calendar [1]. - Plus costs €99 a year, or €10 a month billed monthly, and adds custom templates and AI tools [1]. - Apps exist for Windows, Mac, iPhone and Android [3][9]. - Spark connects Gmail and Outlook or Microsoft 365 accounts by sign-in, and Exchange through EWS [4][5][6]. - Spark stores scheduled emails and notification data on its servers [7][8]. Verdict: Spark suits people who want one free app on every device, with unlimited accounts, a unified inbox and a calendar [1][3]. Plus adds templates and AI [1]. The catch: Spark states that some features need server-side processing of mail, and no OpenPGP, S/MIME or rules are listed [3][7][8]. Best for: People with many accounts who use a phone, a Mac and a PC. ## Points | Criterion | Line | Value | Points | Note | |---|---|---|---|---| | Mail and accounts | Account types | IMAP, Exchange, Gmail and Microsoft 365 sign-in | 9/12 | Works with IMAP and EWS accounts; Google sign-in and Microsoft Graph sign-in are documented. POP3 is not mentioned [4][5][6]. | | Mail and accounts | Unified inbox | Yes | 4/4 | Features page lists a unified inbox for multiple email accounts [3]. | | Mail and accounts | Mail tools | Scheduled send, Snooze, Undo send, Templates | 8/8 | Send Later, Snooze and an undo-send timer are documented; Custom Templates are on the Plus plan [1][3][10]. | | Mail and accounts | Filters and rules | Not published | 0/3 | Not published in the vendor's help article list; only smart folders and sender blocking appear [10]. | | Calendar and contacts | Built-in calendar | Yes | 6/6 | The Free plan lists a calendar, and help covers creating events [1][10]. | | Calendar and contacts | CalDAV and CardDAV | Not published | 0/3 | Not published on the vendor's pages [3][10]. | | Privacy and encryption | OpenPGP | Not published | 0/7 | Not published on the vendor's pages [3][10]. | | Privacy and encryption | S/MIME | Not published | 0/6 | Not published on the vendor's pages [3][10]. | | Privacy and encryption | Blocks tracking pixels | Not published | 0/4 | Not published on the vendor's pages [3][10]. | | Privacy and encryption | Open-source apps | Not published | 0/6 | Not published on the vendor's home page or download page [2][9]. | | Privacy and encryption | Mail stays on your device | No | 0/5 | Spark says scheduled emails and notification data are stored on its servers, and some features need server-side processing [7][8]. | | Systems and upkeep | Other systems | macOS, iOS, Android | 6/10 | Features page has download links for Windows, Mac, Android and iPhone; download page links Mac and Windows apps [3][9]. | | Systems and upkeep | Released in the last year | Yes | 5/5 | Microsoft Store listing for Spark Desktop shows the app package last updated on 6 October 2026 [11]. | | Price | No ads in the app | Not published | 0/3 | Pricing page does not mention ads, and does not say there are none [1]. | | Price | Free plan | Yes | 6/6 | Free plan with unlimited email accounts and no time limit shown [1]. | | Price | Cost of a year | $0 | 12/12 | The Free plan has unlimited accounts, so it counts as $0. The cheapest paid plan, Plus, is €99 a year [1]. | ## Plans | Plan | Price | Per month (USD) | |---|---|---| | Free | Free [1] | $0 | | Plus | €99/year (€10/month) [1] | $9.23 | | Pro | €229/year (€22/month) [1] | $21.35 | The page shows €120 and €264 next to the yearly prices of €99 and €229, which are twelve times the monthly prices of €10 and €22 [1]. ## Strengths - The Free plan has unlimited email accounts and a calendar [1]. - Snooze, Send Later, a unified inbox and an undo-send timer are documented [3][10]. - Apps for Windows, Mac, iPhone and Android [3][9]. - Connects Gmail, Outlook, Microsoft 365, iCloud, Yahoo, Exchange and other IMAP or EWS accounts [4]. ## Limits - Send Later, Teams and notification features use Spark's servers [7][8]. - Custom Templates need the paid Plus plan [1]. - No OpenPGP, S/MIME, CalDAV or rules are listed [3][10]. ## Vendor claims (not scored) - Spark says it never sells your data [8]. ## Sources 1. [Spark pricing](https://sparkmailapp.com/pricing), Readdle, accessed 2026-10-08 2. [Spark home page](https://sparkmailapp.com/), Readdle, accessed 2026-10-08 3. [Spark features](https://sparkmailapp.com/features), Readdle, accessed 2026-10-08 4. [Add and manage accounts](https://sparkmailapp.com/help/add-manage-accounts), Readdle, accessed 2026-10-08 5. [Connect to your email account in Spark](https://sparkmailapp.com/help/add-manage-accounts/connect-to-your-email-account-in-spark), Readdle, accessed 2026-10-08 6. [Microsoft account sign-in required after Spark update](https://sparkmailapp.com/help/troubleshooting/microsoft-account-sign-in-required-after-spark-update), Readdle, accessed 2026-10-08 7. [Email storage and backups](https://sparkmailapp.com/help/general/email-storage-and-backups), Readdle, accessed 2026-10-08 8. [Spark email privacy: everything you need to know](https://sparkmailapp.com/help/privacy-data/spark-email-privacy-everything-you-need-to-know), Readdle, accessed 2026-10-08 9. [Download Spark](https://sparkmailapp.com/download), Readdle, accessed 2026-10-08 10. [Spark help center articles](https://sparkmailapp.com/help/spark-tutorials), Readdle, accessed 2026-10-08 11. [Spark Desktop](https://apps.microsoft.com/detail/XPFCS9QJBKTHVZ), Microsoft Store, accessed 2026-10-08