Best AI Email Assistants in 2026
Updated
In short: Perplexity is ranked #1 of 46 as of 4 October 2026, ahead of Mailbutler Smart Assistant and Spark +AI. The best-ranked option with a free plan is Mailbutler Smart Assistant. The lowest first paid tier on this page is Replai at $0.50/mo.
AI email assistants can help with parts of inbox work, including drafting replies, summarizing threads, and sorting messages. Compare AI reply drafting, inbox triage, thread summaries, and follow-up actions to see which tasks each assistant covers. Email platforms matter for compatibility, while automatic sending distinguishes another capability to weigh. Free-plan availability and paid-from pricing add cost considerations. Perplexity, Mailbutler Smart Assistant, and Spark +AI are among the options, alongside Spike and Shortwave. Think about which parts of your email routine you want support with, and compare those needs against the listed platform support and features.
46 AI email assistants ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 Perplexity iPhone + Android RecognisedPhone appDocumentedFree plan 7.9Free
- 2 Mailbutler Smart Assistant iPhone + Android RecognisedPhone appDocumentedFree plan 7.8$7/mo Inbox triage: YesAI reply drafting: YesAutomatic sending: No
- 3 Spark +AI iPhone + Android RecognisedPhone appDocumentedFree plan 7.7$10/mo Inbox triage: YesAI reply drafting: YesAutomatic sending: No
- 4 Spike iPhone + Android RecognisedPhone appDocumentedFree plan 7.6$4/mo
- 5 Superhuman Go iPhone + Android RecognisedPhone appDocumentedFree plan 7.6$12/mo
- 6 Mailtwine iPhone + Android RecognisedPhone appDocumentedFree plan 7.4 Inbox triage: YesAI reply drafting: YesAutomatic sending: Yes
- 7 Shortwave iPhone + Android RecognisedPhone appDocumentedFree plan 7.1$30/mo
- 8 Inbox Zero iPhone + Android RecognisedPhone appDocumentedFree plan 6.9$20/mo Inbox triage: YesAI reply drafting: YesAutomatic sending: Yes
- 9 Maylee iPhone + Android RecognisedPhone appDocumentedFree plan 6.9$17/mo Inbox triage: YesAI reply drafting: YesAutomatic sending: Yes
- 10 MorningZero Android only RecognisedPhone appDocumentedFree plan 6.9$15/mo Inbox triage: YesAI reply drafting: YesAutomatic sending: No
- 11 Drag iPhone + Android RecognisedPhone appDocumentedFree plan 6.8$1/mo
- 12 Missive iPhone + Android RecognisedPhone appDocumentedFree plan 6.7$14/mo
- 13 Revo iPhone + Android RecognisedPhone appDocumentedFree plan 6.7$22.50/mo Inbox triage: YesAI reply drafting: YesAutomatic sending: No
- 14 Superhuman Mail iPhone + Android RecognisedPhone appDocumentedFree plan 6.7$2.08/mo
- 15 Kai iPhone + Android RecognisedPhone appDocumentedFree plan 6.6$20/mo Inbox triage: YesAI reply drafting: YesAutomatic sending: No
- 16 Serif iPhone only RecognisedPhone appDocumentedFree plan 6.6$30/mo
- 17 Quell Android only RecognisedPhone appDocumentedFree plan 6.5 Inbox triage: YesAI reply drafting: YesAutomatic sending: No
- 18 MailMaestro No phone app RecognisedPhone appDocumentedFree plan 6.2$1/mo Inbox triage: YesAI reply drafting: YesAutomatic sending: No
- 19 EmailOps No phone app RecognisedPhone appDocumentedFree plan 6.1Free Inbox triage: YesAI reply drafting: YesAutomatic sending: No
- 20 Kerna No phone app RecognisedPhone appDocumentedFree plan 6.1€12/mo
- 21 Needle No phone app RecognisedPhone appDocumentedFree plan 6.1Free Inbox triage: YesAI reply drafting: YesAutomatic sending: No
- 22 Metis Mail No phone app RecognisedPhone appDocumentedFree plan 6.0$12/mo
- 23 Replai No phone app RecognisedPhone appDocumentedFree plan 6.0$0.50/mo Inbox triage: YesAI reply drafting: YesAutomatic sending: No
- 24 Demi No phone app RecognisedPhone appDocumentedFree plan 5.8$25/mo
- 25 thread. No phone app RecognisedPhone appDocumentedFree plan 5.6Free
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 Samsung Mobile US Press?
Perplexity is ranked #1 of 46 with a score of 7.9. Mailbutler Smart Assistant is second and Spark +AI third.
How many of these have a free plan?
13 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 mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.