Alternatives to Spark Mail
Smart email client that auto-sorts inboxes and drafts AI-powered replies. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Spark Mail
Smart email client that auto-sorts inboxes and drafts AI-powered replies.
Replacements
Listings that take over the same core job as Spark Mail.
Microsoft Outlook
Microsoft's email, calendar and contacts app for desktop, mobile and the web.
Microsoft Outlook adds a web version and Microsoft 365 calendar integration, with Copilot and some other features on paid plans, and is closed source.
Canary Mail
Encrypted email client with AI features across desktop and mobile.
Canary Mail adds built-in encryption alongside AI triage on the same platforms, but its full feature set requires a paid subscription.
Spike
Turns email into a chat-like interface with message bubbles instead of a list.
Spike turns email into chat-style bubbles with AI help on the same four platforms, with advanced AI and team features on a paid plan.
eM Client
A polished commercial mail, calendar and contacts client for Windows and Mac, with a free tier capped at two accounts.
eM Client adds calendar, tasks, notes and PGP and S/MIME encryption, is sold as a one-time purchase, and caps its free tier at two accounts.
Thunderbird
Mozilla’s desktop mail client, with calendar, contacts and a unified inbox, funded by donations rather than ads.
Thunderbird is free and open source with Linux support, calendar and built-in OpenPGP, but has no iOS app and no AI reply drafting.
Mailspring
A desktop mail client with a unified inbox, snooze and send later, whose paid tier adds read receipts.
Mailspring is open source with a Linux version and free snooze and send later, but has no mobile apps, calendar or AI features.
BlueMail
Cross-platform email and calendar client with a unified inbox.
BlueMail offers a unified inbox and calendar including a Linux version, closed source, with its handling of credentials having drawn criticism.
Mailbird
Desktop email client for Windows and macOS with a unified inbox.
Mailbird is a paid Windows and macOS client with a unified inbox and app integrations, without mobile apps or AI categorization.
Also worth comparing
These listings name Spark Mail as their own alternative, so the relationship runs both ways.
Apple Mail
The email app built into macOS, iOS and iPadOS for reading mail from several providers.
Spark Mail adds automatic inbox categorization and AI-drafted replies on Mac, iOS, Windows and Android, with AI and team features on a paid plan.
K-9 Mail
Open-source Android email client built for handling large volumes of mail.
Spark Mail adds automatic inbox categorization and AI-drafted replies on Android and iOS, but is closed source with AI features on a paid plan.
Microsoft Outlook for iOS and Android
Microsoft's Outlook mobile app for email, calendar and contacts on iPhone, iPad and Android.
Spark Mail runs on Android and iOS with automatic inbox categorization and AI-drafted replies, with AI and team features on a paid plan.
Wino Mail
Native Windows mail and calendar client for Outlook, Gmail and IMAP accounts.
Spark Mail adds automatic inbox sorting and AI-drafted replies on Windows, macOS and mobile, but it is closed source with AI features on a paid plan.
Similar software
Related functionality, not a direct replacement.
Leave Me Alone
Web service that lists your newsletter subscriptions and unsubscribes you from them with one click.
