Smart email app that sorts your inbox and adds AI tools
Spark is an email client from Readdle that works with Gmail, Outlook, iCloud and other IMAP accounts on Mac, Windows, iPhone and Android. Its smart inbox separates personal mail, notifications and newsletters, and it supports send later, snoozing, a gatekeeper for new senders and AI writing help. Teams can share email threads, comment on them privately and draft replies together.
- features
- 4
- alternatives
- 11
- platforms
- 4
- Updated
- Oct 12, 2026
Features
Our take
Pros
- Smart inbox separates personal mail, notifications and newsletters
- Shared threads and private comments for team email
- Gatekeeper screens new senders before they reach the inbox
Cons
- Sync relies on Readdle’s servers, which raises privacy questions
- AI and team features require a paid plan
Editorial assessment by the Alternatives.tools team, based on what the product is known for. Not a user review.
Best Spark alternatives
See all 11 alternatives
SuperhumanPaidFast, keyboard-driven email for Gmail and Outlook accounts
4.6(3.7K) · App Store
Microsoft OutlookFreemiumEmail, calendar and contacts from Microsoft
4.8(9.3M) · App Store
GmailFreemiumGoogle's free email service with smart filtering
4.7(2.4M) · App Store
Apple MailFreeBuilt-in email app for Mac, iPhone and iPad
- MailspringFreemiumOpen source
Open-source desktop email client for Windows, Mac and Linux
17.9Kstars 
eM ClientFreemiumDesktop email, calendar and tasks for Windows and Mac
User reviews
No reviews yet. Be the first to share your experience with Spark.