Mailbutler Smart Assistant
by Mailbutler Smart AssistantMailbutler Smart Assistant is an email assistant available on web, mobile and desktop platforms.
Free plan Free trial AndroidiPhone & iPadWebWindowsMacLinux+1
Best AI Email Assistants 2026
Facts read 21 Sep 2026 – 15 Oct 2026
AI email assistants can sort inboxes, draft replies, summarize threads and help with follow-up work. This guide helps you compare access, pricing and email features before choosing a tool.
The standings: top 10
| Name | In a line | Record score | Price from | Try it free | Runs on | Facts read |
|---|---|---|---|---|---|---|
| 01 Mailbutler Smart Assistant | Mailbutler Smart Assistant is an email assistant available on web, mobile and desktop platforms. | 6.6 | Free plan | Free plan | Android, iPhone & iPad, Web, Windows | 15 Oct 2026 |
| 02 Shortwave | Shortwave is an email app for Android, iOS, Mac, Windows and the web that can schedule messages to send later. | 6.1 | $30 a month | Free plan | Android, iPhone & iPad, Web, Windows | 4 Oct 2026 |
| 03 Superhuman Go | Superhuman Go is an AI assistant that offers writing suggestions and uses screen context across apps and websites. | 6.1 | $12 a month, billed yearly | Free plan | Android, iPhone & iPad, Web, Windows | 2 Oct 2026 |
| 04 Fyxer | Fyxer sorts email and meeting inboxes and supports follow-up management on iOS, Mac, Windows and the web. | 6.0 | Free plan | Free plan | iPhone & iPad, Web, Windows, Mac | 14 Oct 2026 |
| 05 Perplexity | Perplexity is an AI assistant for Android, iOS, Mac, Windows and the web, with search, uploads and image creation. | 6.0 | $20 a month | Free plan | Android, iPhone & iPad, Web, Windows | 28 Sep 2026 |
| 06 Serif | Serif handles routine email for shared addresses and escalates ambiguous or sensitive messages for team review. | 6.0 | $30 a month | Free plan | iPhone & iPad, Web, Windows, Mac | 14 Oct 2026 |
| 07 Spark +AI | Spark +AI searches email and related notes, and can draft, revise, proofread and translate messages. | 6.0 | $10 a month, billed yearly | Free plan | Android, iPhone & iPad, Windows, Mac | 15 Oct 2026 |
| 08 Spike | Spike suits people who want to organize existing email accounts and manage multiple inboxes, as well as teams that need shared workspaces and collaboration tools. | 6.0 | $4 a month, billed yearly | Free plan | Android, iPhone & iPad, Web, Windows | 4 Oct 2026 |
| 09 Drag | Drag is a shared inbox for Gmail teams with boards, assignments, shared drafts and AI features. | 5.8 | $12 a month, billed yearly | Free trial | Android, iPhone & iPad, Web, Windows | 15 Oct 2026 |
| 10 Metis Mail | Metis Mail is an open-source email assistant available as a web app or self-hosted service. | 5.5 | $115 a year | Free plan | Web, API, Self-hosted | 15 Oct 2026 |
The page has no published ranking basis, so its order can change. Compare free plans, trial access, platform support and the listed inbox and sending features.
02
Shortwave
Shortwave is an email app for Android, iOS, Mac, Windows and the web that can schedule messages to send later.
AndroidiPhone & iPadWeb+2 Record6.1 Visit
03
Superhuman Go
Superhuman Go is an AI assistant that offers writing suggestions and uses screen context across apps and websites.
AndroidiPhone & iPadWeb+3 Record6.1 Visit
04
Fyxer
Fyxer sorts email and meeting inboxes and supports follow-up management on iOS, Mac, Windows and the web.
iPhone & iPadWebWindows+2 Record6.0 Visit
05
Perplexity
Perplexity is an AI assistant for Android, iOS, Mac, Windows and the web, with search, uploads and image creation.
AndroidiPhone & iPadWeb+3 Record6.0 Visit
6
Serif
iPhone & iPadWebWindows+1 $30 a month Record6.0 Visit Serif handles routine email for shared addresses and escalates ambiguous or sensitive messages for team review.
7
Spark +AI
AndroidiPhone & iPadWindows+1 $10 a month, billed yearly Record6.0 Visit Spark +AI searches email and related notes, and can draft, revise, proofread and translate messages.
8
Spike
AndroidiPhone & iPadWeb+2 $4 a month, billed yearly Record6.0 Visit Spike suits people who want to organize existing email accounts and manage multiple inboxes, as well as teams that need shared workspaces and collaboration tools.
9
Drag
AndroidiPhone & iPadWeb+4 $12 a month, billed yearly Record5.8 Visit Drag is a shared inbox for Gmail teams with boards, assignments, shared drafts and AI features.
10
Metis Mail
WebAPISelf-hosted $115 a year Record5.5 Visit Metis Mail is an open-source email assistant available as a web app or self-hosted service.
11
Kerna
WebWindowsMac €12 a month Record5.4 Visit Kerna runs in Gmail and Outlook to sort mail, draft replies, and summarize threads.
12
MailMaestro
WebBrowser extension $144 a year Record5.4 Visit MailMaestro may suit professionals who want help writing, revising, and summarizing email, or coordinating meeting replies.
13
Kai
AndroidiPhone & iPadWeb+1 $20 a month Record5.2 Visit Kai connects email and calendars to triage mail, draft replies, schedule events and track commitments.
14
MorningZero
AndroidWebWindows+2 $15 a month, billed yearly Record5.2 Visit MorningZero combines Gmail, Outlook and IMAP inboxes, with AI triage, search and replies that need your approval.
15
MailWise
Web £15 a month Record5.1 Visit MailWise is a web AI email assistant that sorts messages, drafts replies, extracts action items, and sets reminders.
16
EmailOps
WindowsMacLinux Free plan Record5.0 Visit EmailOps is an open-source desktop email client that runs AI on your computer across connected mail accounts.
17
Inbox Zero
AndroidiPhone & iPadWeb+3 $20 a month Record5.0 Visit Inbox Zero sorts Gmail, Google Workspace and Outlook, drafts replies, blocks cold email and tracks email activity.
18
OpenMailBot
WebWindowsMac+2 Free plan Record4.9 Visit OpenMailBot is an open-source AI layer that summarizes email threads, drafts replies, answers inbox questions, and labels messages.
19
MailCopilot
WindowsMacLinux Free plan Record4.8 Visit MailCopilot is a desktop email app for unified inboxes, offline use, and scheduled sending.
20
Missive
AndroidiPhone & iPadWeb+2 $14 a month, billed yearly Record4.8 Visit Missive may suit people or teams who want a unified inbox across desktop and mobile platforms, with offline access, scheduled sending, and calendar tools.
21
Quell
AndroidWebBrowser extension A$14.95 a month Record4.8 Visit Quell triages Gmail and Outlook, summarizes messages and drafts replies for your review.
22
Remail
WebBrowser extension $9 a month Record4.8 Visit Remail is an AI assistant for email and other writing tasks, with contextual reply drafts, tone settings, and scheduling links.
23
Ellie
WebWindowsBrowser extension Free plan Record4.7 Visit Ellie drafts replies in your voice in Gmail and Outlook, then saves them to Drafts for review.
24
EmailAgent
Web Free plan Record4.7 Visit EmailAgent is a web email assistant that triages messages, drafts replies, coordinates meetings, and schedules vendor follow-ups.
25
InboxPilot
WebSelf-hosted $32 a month, billed yearly Record4.7 Visit InboxPilot drafts business email replies using company information and sorts messages to the right team.
Before you choose
Check access and platforms
Confirm that an assistant works where you read email. The comparison covers web, macOS, Windows, Android, iOS and browser extensions.
Mailtwine lists Android, iOS, Linux, macOS, web and Windows support. Maylee lists Android, iOS, macOS, web and Windows support.
Start with the free option
A free plan lets you keep using a tool without a paid subscription. Perplexity, Spike, Spark +AI and Superhuman Go list free plans.
A free trial gives temporary access instead. Fyxer lists a seven-day trial, Shortwave lists a 14-day trial and Maylee lists a 30-day trial.
Match the inbox tasks
Compare inbox triage, AI reply drafting and thread summaries. These features address sorting, writing responses and catching up on conversations.
Follow-up actions can help you track what needs attention after a message. Check how a tool presents these controls before you commit.
Review sending controls
Automatic sending is a separate comparison point from reply drafting. If you want to approve messages yourself, check how the assistant handles sending.
Follow-up actions and summaries can affect how much control you keep over a conversation.
Read the paid terms
Compare the starting price, billing period and trial terms. Fyxer lists a starting price of $22.50 per user each month with annual billing, while Serif lists $30 per month and a seven-day trial.
Spark +AI lists paid access from $10 per user each month and a seven-day trial. Shortwave lists paid access from $30 per user each month and a 14-day trial.
Questions
Which assistants list a free plan?
Fyxer, Perplexity, Spike, Spark +AI, Superhuman Go and Shortwave list free plans.
Which assistants list a free trial?
Fyxer and Spark +AI list seven-day trials. Shortwave lists 14 days, and Maylee lists 30 days.
What platforms does Mailtwine support?
Mailtwine lists Android, iOS, Linux, macOS, web and Windows support.
What platforms does Maylee support?
Maylee lists Android, iOS, macOS, web and Windows support.
What inbox features can I compare?
The comparison covers inbox triage, AI reply drafting, automatic sending, thread summaries and follow-up actions.
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