8 best AI email assistants in 2026, and what each one actually does

An AI email assistant is software that reads your mail and does part of the work for you: it drafts replies, sorts what matters from what does not, reminds you to follow up, or follows a piece of work through to the end. The best one depends on which of those you need most.

If you want a faster email app, look at Superhuman or Shortwave. If you want drafts inside the Gmail or Outlook you already use, look at Fyxer or Inbox Zero. If you already pay for Google Workspace or Microsoft 365, start with the AI you have. And if your problem is work that runs across many threads and keeps slipping, that is what we built Pingbo for. If you code, you can also build your own with Claude Code or Codex; we cover that further down.

Below are eight tools: what each one does well, where each falls short, and what it costs.

Quick comparison

Tool	Best for	Works with	Setup	Price from (monthly)
Pingbo	Seeing work through across threads	Gmail	None	In beta
Superhuman	Fast, keyboard-first email	Gmail, Outlook	Some	$30/user
Shortwave	AI search on Gmail	Gmail	Some	$30/user
Fyxer	Drafts and meeting notes	Gmail, Outlook	None	$49/user
Inbox Zero	Your own rules	Gmail, Outlook	Hands-on	$20/user
Gemini in Gmail	Google Workspace users	Gmail	None	$8.40/user (with Workspace)
Microsoft Copilot	Microsoft 365 users	Outlook	None	$28.20/user (with M365)
SaneBox	Less noise, nothing else	Almost any	None	$9.49

Why the spread? Roughly, you pay for how much AI work a tool does on each email. SaneBox sorts by sender and by what you have done before, and says it reads only headers, so it costs little to run. Gemini comes bundled with Google Workspace, and it works only when you ask. Tools that draft and sort every message on their own, like Fyxer and Superhuman, cost more.

What do you need from an AI email assistant?

Most people looking for an AI email assistant want one of five things. Name yours first, because the tools below are good at different ones.

• Write faster. Drafts in your own voice, so a reply takes a glance and an edit instead of ten minutes.
• A calmer inbox. Newsletters, receipts and cold pitches sorted out of the way, so what is left is what deserves you. Notifications too: Gmail buzzes for every message by default, and a good assistant only interrupts you when something actually needs you.
• Remember to follow up. A nudge when someone has not replied, so nothing waits on your memory.
• Get a piece of work done. A contract, a hire, a renewal: work that runs across many threads and many weeks, followed until it is finished, not one reply at a time.
• Keep the inbox you know. Every tool below works with the Gmail or Outlook account you already have. The difference is whether it helps inside Gmail or Outlook, or gives you a new place to handle the same mailbox.

The table below checks each tool against those five needs. ✅ means it does it on its own; 🟡 means only when you ask, with extra setup, or on a higher plan; ❌ means no.

Tool	Drafts replies	Sorts mail	Follow-up reminders	Follows work across threads	Where you use it
Pingbo	✅	✅	✅	✅	Its own app
Superhuman	🟡 Business plan	✅	✅	❌	Its own app
Shortwave	🟡 When you ask	✅	🟡 You set them	❌	Its own app
Fyxer	✅	✅	✅ Pro plan	❌	Gmail or Outlook
Inbox Zero	✅	✅	✅	❌	Gmail or Outlook
Gemini in Gmail	🟡 When you ask	🟡 In testing	❌	❌	Gmail
Microsoft Copilot	🟡 When you ask	🟡 When you ask	🟡 When you ask	❌	Outlook
SaneBox	❌	✅ By sender only	✅	❌	Any email app

The 8 best AI email assistants

Prices and features come from each product’s own website; if we could not confirm something there, we left it out. Where another tool does better than Pingbo, we say so.

1. Pingbo: best for seeing work through across many threads

Pingbo is an AI email agent for iPhone that works on top of the Gmail you already have. Its unit is not the message but the Matter: every thread about one piece of work, gathered in one place with its people, deadlines and next move. You do not file anything; Pingbo builds Matters from your mail and keeps them up to date.

Each Matter has a goal, the point at which the work counts as done, and Pingbo keeps working toward it. When new mail arrives, or a follow-up date comes round, it checks where the Matter stands and prepares the next step: a reply, a chase, or the thing you need to do outside email. All your Matters sit on one board, split into what needs you and what is waiting on someone else.

Say you freelance, and you are waiting on three clients at once: one has not answered your quote, one has not signed the contract, one still owes you files. Or you are a VC, and one deal is spread across a dozen threads with the founders, the lawyers and co-investors. Pingbo turns each of these into its own Matter, so you can see at a glance which one is stuck, and on whom.

Every email Pingbo prepares goes out in your name, from your own Gmail, to your clients, colleagues and partners. So it weighs the relationship as well as the task: whether to chase at all, when, and how firmly. Nothing is sent without your approval.

Pros

• Follows a piece of work across threads and weeks, not one message at a time
• Drafts your replies, and moves newsletters and noise out of the way
• Does not buzz for every email: it asks whether a piece of work needs you now, not whether you often write to the sender, and rolls the rest into a daily brief
• Sets follow-up dates from what the thread actually says, and brings the Matter back with the chase already drafted
• Works on your existing Gmail; your mail stays in Gmail
• Free during the beta

Cons

• Gmail only for now; Outlook comes later
• iPhone only, with no web or Android app yet
• The beta is by application

Price: in beta, and free for the whole beta. Join the beta.

2. Superhuman: best for heavy email days at a desk

Superhuman is its own email app for Gmail and Outlook accounts, built around speed and keyboard shortcuts. Its AI drafts replies, applies labels, summarises threads, and answers questions about your mail through Ask AI. A split inbox separates what matters from the rest, and Superhuman reminds you to follow up when someone has not replied (Superhuman Mail).

Pros

• Very fast once you learn the shortcuts
• Its AI drafts replies, applies labels, summarises threads and answers questions about your mail
• Follow-up reminders and send-later built in

Cons

• Built for keyboard power users; if you mostly handle email on your phone or with a mouse, its biggest advantage largely goes unused
• It makes each message faster to handle; it does not keep track of a piece of work that spans several threads and weeks
• Auto Drafts and custom AI labels need the Business plan (plans)

Price: Starter from $30 per user a month; Business $40.

3. Shortwave: best for AI search on Gmail

Shortwave is an email app built on Gmail, on the web, desktop, iPhone and Android. It sorts your inbox and flags to-dos, lets you write filters in plain English, drafts replies in your style, and searches across your email and attachments. You can also schedule a reminder to follow up if you do not get a reply (Shortwave).

Pros

• Some of the best AI search over years of email
• Apps on every platform, including Android
• Plain-English AI filters

Cons

• Automatic drafts need its sister product, Tasklet; Shortwave itself drafts when you ask (Shortwave)
• Connects natively only to Gmail and Google Workspace; Outlook and other providers have to be routed through a Gmail account first (FAQ)
• AI filter counts and model access depend on the plan; Business includes three AI filters (pricing)
• Its changelog was last updated in February 2026, and its latest updates and blog posts introduce the team’s other product, Tasklet

Price: Business from $30 per seat a month, with a 14-day free trial.

4. Fyxer: best for drafts and meeting notes inside Gmail or Outlook

Fyxer works inside Gmail or Outlook. It sorts your mail into To respond, FYI and Marketing, drafts replies in your tone, takes meeting notes and drafts the follow-up, and keeps a running list of follow-ups on the Pro plan. Fyxer says plainly that it drafts and you decide what gets sent (pricing).

Pros

• Works inside Gmail or Outlook, with no new interface to learn
• Email and meeting notes in one product
• Works with Gmail and Outlook

Cons

• Usage is metered in credits, and inbox sorting is the first thing to pause when they run out
• The free plan does not sort your inbox or draft replies

Price: Pro from $49 per user a month.

5. Inbox Zero: best for your own rules, with open source code

Inbox Zero runs on your existing Gmail, Google Workspace or Outlook account. You describe rules in plain English, and it sorts and labels every email, drafts replies in your voice, blocks cold email, bulk-unsubscribes, briefs you before meetings and reminds you to follow up (pricing, docs). It is open source.

Pros

• Open source, so you can read how your mail is handled
• Rules in plain English rather than fixed categories
• Apps for iPhone, Android and desktop, plus a Chrome extension

Cons

• A 7-day trial that needs a card, and no free plan on the hosted version
• Self-hosting skips the subscription, but you run the servers and the Google sign-in setup yourself, and bring your own AI model API key and pay for its usage (self-hosting guide)
• The Starter plan covers one email account

Price: Starter from $20 per user a month.

6. Gemini in Gmail: best if you already pay for Google Workspace

Gemini sits inside Gmail, in the side panel and the compose window. It summarises threads, drafts with Help me write, suggests quick replies, and answers questions across your mail (Gemini in Gmail). In January 2026 Google also announced AI Inbox, which puts important people and urgent items first and pulls out to-dos, but it opened to trusted testers first, with wider access promised in the following months (Google).

Pros

• Nothing to install or connect; it is already in Gmail
• Included in Google Workspace plans

Cons

• It helps when you ask; it does not keep track of what you are waiting on
• Gmail only, and personal Gmail needs a paid Google AI plan

Price: included in Google Workspace business plans, from $8.40 per user a month for Business Starter.

7. Microsoft Copilot in Outlook: best for teams on Microsoft 365

Copilot is built into Outlook, Word, Excel, PowerPoint and Teams. In Outlook it helps you draft and catch up on mail, with the same assistant working across the rest of Microsoft 365 (Copilot for business).

Pros

• The same assistant works in Word, Excel and Teams, not just email
• It lives inside Outlook, so Outlook users have nothing new to learn

Cons

• An add-on for eligible Microsoft 365 business plans, not something you can buy alone
• Outlook only
• It is a general assistant for all of Microsoft 365; email is one part of it, not what it was built around

Price: $28.20 per user a month for Microsoft 365 Business Standard with Copilot. If you already have Microsoft 365, the Copilot Business add-on alone is $25.20.

8. SaneBox: best for a quieter inbox and nothing else

SaneBox works with your current email provider and adds folders. It moves unimportant mail out of your inbox, lets you banish a sender for good, sends a daily digest, automatically collects sent emails nobody has answered, and lets you set reminders (SaneBox, help). It does not write anything for you.

Pros

• Works with almost any provider and any email app
• Its FAQ says sorting reads only email headers, not message bodies, which is reassuring for privacy (FAQ)

Cons

• It sorts mainly by sender and your past habits, and it does not draft
• Because it never reads the body, it cannot tell what a message is actually about
• If SaneBox is offline, mail simply stays unsorted in your inbox

Price: from $9.49 a month, with a one-week trial (pricing).

Pricing at a glance

Tool	Free or trial	For the full AI features
Pingbo	Free during the beta	Everything is included during the beta
Superhuman	No free Mail plan	Auto Drafts and AI labels need Business, $40/user/month
Shortwave	14-day trial	Business has three AI filters; stronger models need Premier, $45/seat/month
Fyxer	Free plan, but no sorting or drafts	Pro at $49/user/month, metered in credits
Inbox Zero	7-day trial, card required	Starter covers one account; two or more need Plus, $35/user/month
Gemini in Gmail	No	Starter covers Gemini in Gmail only; Docs and Meet need Standard
Microsoft Copilot	Trial available	With Microsoft 365 already, the Copilot add-on is $25.20/user/month
SaneBox	One-week trial	No drafting on any plan

Other ways to go

Tired of Gmail, but don’t want to switch?

Many people searching for a Gmail alternative are not unhappy with Gmail itself. They are unhappy with what their inbox has become: too much mail, too many threads to keep track of, and the nagging sense that something important has slipped.

Moving to a new email provider does not fix that. Your address changes, your history has to be moved, and in a month the new inbox looks like the old one. If privacy or leaving Google is the reason, a provider like Proton is the right move.

If not, the good news is that every tool on this list lets you keep your Gmail account. What differs is where you spend your day. Fyxer, Inbox Zero, Gemini and SaneBox work inside Gmail: it gets easier to use, but you are still looking at Gmail. If what you are tired of is opening Gmail itself, Superhuman, Shortwave and Pingbo give you a new place to handle the same mailbox. Pingbo goes furthest: you stop working through messages and start working through Matters.

If you code: build it with Claude Code or Codex

If you are comfortable in a terminal, you may not need any of these products. Claude’s apps can connect to Gmail directly (Anthropic help), and Claude Code or Codex can reach it through a Gmail MCP server. From there you can ask an agent to triage your inbox, summarise threads or draft replies, with rules as specific as you like.

It is flexible and, if you already pay for one of them, almost free. The one real cost is upkeep. Scheduling it to check your inbox, sending reminders to Slack or your phone when someone goes quiet, remembering where a piece of work stands across weeks, and guarding against an email that tells it to forward something: all of that is yours to build, and to keep from breaking.

Which AI email assistant should you pick?

• You already pay for Google Workspace or Microsoft 365: start with Gemini or Copilot. They cost nothing extra to try.
• You want to clear email faster, in a new place to work: Superhuman, or Shortwave if you are on Gmail and want AI search.
• You want drafts while staying inside Gmail or Outlook: Fyxer, or Inbox Zero if you want your own rules and open source code.
• You only want less noise: SaneBox.
• You do not want to spend time setting things up: start with the tools marked “None” under Setup in the comparison table.
• Work keeps stalling in a thread you forgot about: Pingbo. It drafts, sorts and reminds you to follow up too, but around a piece of work rather than a single message. For the follow-up emails themselves, see our six client follow-up templates.

A last word

AI is already good at writing email. The hard part is getting the work done. Most of the tools above make each message faster to handle. But if you keep finding out days later that something was stuck in a thread, that is the problem we built Pingbo for. Pingbo is in beta, works with Gmail, and is free for the whole beta. Join the beta.

FAQ

What is the best AI email assistant?

It depends on the job. For speed, Superhuman. For AI search on Gmail, Shortwave. For drafts inside your existing inbox, Fyxer or Inbox Zero. For work that spans many threads, Pingbo. If you already pay for Google Workspace or Microsoft 365, try the assistant you have first.

Is there a free AI email assistant?

Pingbo is free during its beta. Gemini in Gmail and Copilot in Outlook come with some paid Google and Microsoft plans. Fyxer has a free plan, but it does not sort mail or draft replies. Most others offer a trial of one or two weeks.

Do AI email assistants work with Gmail?

All eight tools here work with Gmail except Microsoft Copilot. Pingbo, Shortwave and Gemini are Gmail only.

Can an AI email assistant send emails for me?

Most draft and wait for you. Fyxer says you decide what gets sent, and Pingbo never sends without your approval. Check each tool’s settings before you allow anything to send on its own.

Are AI email assistants safe?

They need access to your mailbox, so check what each one reads, where it stores your data, and how you revoke access. SaneBox says its sorting reads only headers. Inbox Zero is open source. Pingbo uses Google’s scoped permissions, which you can revoke at any time.

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Prices and features are taken from each product's own website, checked on 10 October 2026. They may have changed since.