Best AI Email Assistants in 2026
Updated
In short: Mailbutler Smart Assistant is ranked #1 of 46 as of 4 October 2026, ahead of Perplexity and Spark +AI. The best-ranked option with a free plan is Perplexity. The lowest first paid tier on this page is Replai at $0.50/mo.
Busy inboxes can call for help with drafting, organizing, or acting on email. AI email assistants vary in their reply drafting, inbox triage, thread summaries, and follow-up actions, so compare those capabilities with the email platforms you use. Automatic sending is another distinction to check, alongside free-plan availability and the paid-from price. Mailbutler Smart Assistant and Spark +AI lead the ranking, followed by EmailOps and Superhuman Go. Consider which parts of your email routine you want an assistant to handle, and whether its platform support and listed features match that workflow.
46 AI email assistants ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 Mailbutler Smart Assistant Top pick · 7.5 Free plan · $7/mo #2 Perplexity Runner-up · 7.5 
#3 Spark +AI Also great · 7.1 Free plan · $10/mo
- Free planFree trial AndroidextensioniOSLinuxmacOSWebWindows
- Free plan
- Yes
- Paid from
- 4 /user/mo
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- No
- Thread summaries
- Yes
RecognisedDocumentedFree planPlatforms$7/mofirst paid tier About Mailbutler Smart AssistantVisit site - Free plan AndroidapiiOSmacOSWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free planFree trial AndroidiOSmacOSWindows
- Free plan
- Yes
- Paid from
- 10 /user/mo
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- No
- Thread summaries
- Yes
RecognisedDocumentedFree planPlatforms$10/mofirst paid tier About Spark +AIVisit site - Free plan WebWindowsmacOSiOSAndroid
- Free plan
- Yes
- Paid from
- 4 /user/mo
RecognisedDocumentedFree planPlatforms$4/mofirst paid tier About SpikeVisit site - Free planFree trial AndroidextensioniOSmacOSWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms$12/mofirst paid tier About Superhuman GoVisit site - Free plan LinuxmacOSWindows
- Free plan
- Yes
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- No
- Thread summaries
- Yes
RecognisedDocumentedFree planPlatforms - Free plan macOSWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms€12/mofirst paid tier About KernaVisit site - AndroidiOSLinuxmacOSWebWindows
- Free plan
- No
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- Yes
- Thread summaries
- Yes
RecognisedDocumentedFree planPlatforms - Free planFree trial extensionWeb
- Free plan
- Yes
- Paid from
- 12 /user/mo
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- No
- Thread summaries
- Yes
RecognisedDocumentedFree planPlatforms$1/mofirst paid tier About MailMaestroVisit site - Free trial AndroidiOSmacOSWebWindows
- Free plan
- Yes
- Paid from
- 30 /user/mo
RecognisedDocumentedFree planPlatforms$30/mofirst paid tier About ShortwaveVisit site - Free plan Web
- Free plan
- Yes
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- No
- Thread summaries
- Yes
RecognisedDocumentedFree planPlatforms - Free plan Web
- Free plan
- Yes
- Paid from
- 12 /user/mo
RecognisedDocumentedFree planPlatforms$12/mofirst paid tier About Metis MailVisit site - Free trial AndroidLinuxmacOSWebWindows
- Free plan
- No
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- No
- Thread summaries
- Yes
RecognisedDocumentedFree planPlatforms$15/mofirst paid tier About MorningZeroVisit site - Free plan Web
- Free plan
- Yes
- Paid from
- 6 /user/mo
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- No
RecognisedDocumentedFree planPlatforms$0.50/mofirst paid tier About ReplaiVisit site - Free trial AndroidapiextensioniOSmacOSWebWindows
- Free plan
- No
- Paid from
- 12 /user/mo
RecognisedDocumentedFree planPlatforms$1/mofirst paid tier About DragVisit site - AndroidiOSmacOSWebWindows
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- Yes
- Thread summaries
- Yes
RecognisedDocumentedFree planPlatforms$17/mofirst paid tier About MayleeVisit site - Free plan macOS
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms$25/mofirst paid tier About DemiVisit site - WebWindowsmacOSiOSAndroid
- Free plan
- No
- Paid from
- 14 /user/mo
RecognisedDocumentedFree planPlatforms$14/mofirst paid tier About MissiveVisit site - WebWindowsmacOSiOSAndroid
- Free plan
- No
RecognisedDocumentedFree planPlatforms$2.08/mofirst paid tier About Superhuman MailVisit site - Free trial AndroidapiextensioniOSself-hostedWeb
- Free plan
- No
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- Yes
- Thread summaries
- Yes
RecognisedDocumentedFree planPlatforms$20/mofirst paid tier About Inbox ZeroVisit site - LinuxWindowsmacOS
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - WebWindowsmacOSLinux
- Free plan
- Yes
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Thread summaries
- Yes
RecognisedDocumentedFree planPlatforms - WebWindowsmacOSiOS
- Free plan
- No
RecognisedDocumentedFree planPlatforms$30/mofirst paid tier About SerifVisit site - Free trial AndroidiOSmacOSWeb
- Free plan
- No
- Paid from
- 50 /user/mo
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- No
RecognisedDocumentedFree planPlatforms$20/mofirst paid tier About KaiVisit site - AndroidiOSWeb
- Free plan
- No
- Paid from
- 22.5 /user/mo
- Inbox triage
- Yes
- AI reply drafting
- Yes
- Automatic sending
- No
RecognisedDocumentedFree planPlatforms$22.50/mofirst paid tier About RevoVisit site
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which AI email assistant is ranked first on Everything Xiaomi?
Mailbutler Smart Assistant is ranked #1 of 46 with a score of 7.5. Perplexity is second and Spark +AI third.
How many of these have a free plan?
12 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Replai has the lowest first paid tier we found: $0.50/mo.
How is this list ranked?
Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on. Paid placements never change a rank.