SSuperhuman Mail

Superhuman Mail is the AI email client for people whose day is mostly email. It sorts new messages, writes replies in your voice, brings back threads nobody answered with a follow-up ready and moves marketing mail out of the way, all on top of your existing Gmail or Outlook account. It is best for executives, founders and sales leaders who handle heavy volume and value speed. Price is the main thing to weigh: there is no free plan, and the reply-drafting agent sits on the $40-a-month Business plan.

Superhuman Mail starts at $30 a month. Since October 2025 it has belonged to Superhuman, the company formerly known as Grammarly, whose writing assistant has 40 million daily users. We rate it 8.6/10 on our scale. We have not used it hands-on; this review is based on Superhuman’s published product pages and pricing, news coverage and Capterra reviews.

Rebrand Coverage and Capterra Figures We Checked

These are the figures we confirmed on Superhuman’s own pages, in news coverage of the 2025 rebrand and on Capterra.

For a buyer, the most useful numbers are the two plan prices. The $10 monthly gap between Starter and Business is where the agent behavior lives: Business is the plan that writes replies for you. Anyone evaluating Superhuman for its AI should trial Business, not Starter.

The ownership change also matters. Superhuman Mail used to be a standalone startup product; it now sits inside a much larger company with a 40-million-daily-user writing tool, which makes the product less likely to disappear and more likely to be bundled with Grammarly and Superhuman Go over time.

A Full Email Client With AI Working on the Mailbox

Superhuman Mail is an email client, not a separate bot. You read and send mail in Superhuman’s apps while its AI features work on the mailbox in the background.

Linking Gmail or Outlook Accounts and Calendars

1. Connect accounts: sign in with one or more Gmail, Google Workspace or Outlook accounts. Superhuman works inside your existing mailbox rather than migrating mail.
2. Add calendars: calendars are connected during setup so drafts and scheduling replies can use your availability.
3. Set what skips the inbox: choose which kinds of low-priority mail Auto Archive may move.
4. Learn the shortcuts: the client is keyboard-first; reviewers say the payoff is speed once shortcuts become habit.

Auto Labels, Auto Drafts and Follow-Up Reminders

• Auto Labels: every new message is labeled and sorted on arrival, so urgent conversations surface first. Business adds Custom Auto Labels you define.
• Auto Drafts: messages that need a reply get a draft written in your voice, using your inbox, calendar and the web, and adapted to each recipient.
• Auto Reminders: if someone has not replied, the thread returns to the top of the inbox with a follow-up already drafted.
• Auto Archive: marketing mail and cold pitches are archived, never deleted, with a daily recap of what was moved.
• Scheduling replies: responses that propose times are prepared from your real-time availability.

You Still Press Send on Every Reply

You review and send every reply. Superhuman prepares drafts and follow-ups but does not send them on its own inside the client, so the person remains the last check on tone, facts and commitments. You also set the rules for what gets archived, and you can pull anything back since nothing is deleted.

Ask AI and Mail MCP

Ask AI is listed as a Business plan feature. The Mail MCP server goes further: it connects your mailbox to Claude, ChatGPT and other AI tools, which can then search messages, summarize threads, draft replies, send email and manage follow-ups and meetings when you instruct them. That is the most autonomous way to use Superhuman, and it puts the outside AI tool in charge of what gets sent.

Superhuman Go and the Wider Suite

At the October 2025 rebrand, the company launched Superhuman Go, a proactive assistant that works across more than 100 apps including Gmail, Outlook, Slack and Google Docs. It is a separate product from Superhuman Mail, but it signals where the company is heading: agents that move between email, documents and chat.

Making the 30-Day Trial Count on Business

The 30-day trial is long enough to measure real results if you set it up deliberately. Start on Business so Auto Drafts are switched on, connect every account you actually use and give the system a week to learn your writing before judging drafts.

• Draft acceptance: count how many Auto Drafts you send with no edits or light edits, versus rewriting from scratch.
• Time in inbox: compare minutes per day in email during week one and week four against your usual baseline, to test the half-the-time claim.
• Follow-up catches: note threads Auto Reminders resurfaced that you would otherwise have dropped.
• Archive accuracy: check the daily recap for anything important that was filed away, and adjust what may skip the inbox.
• Label quality: see whether urgent conversations really surface first, and add Custom Auto Labels for your own categories.

If draft acceptance stays low after two weeks, Starter or a lower-priced tool may fit your needs better than Business.

Published Per-User Prices for Every Plan

Superhuman publishes its prices. All plans are per user.

New users get a 30-day trial. There is no free plan.

A Solo Founder’s Starter or Business Year

A solo founder on Starter. Paying monthly costs $360 a year; paying annually costs $300. If you want Auto Drafts, Business on annual billing is $396 a year.

A five-person leadership team on Business. Annual billing comes to $1,980 a year ($396 times five). Monthly billing costs $2,400 a year, so annual saves $420.

A 20-person sales team. Business on annual billing costs $7,920 a year. At that size, ask about Enterprise, since SSO and advanced controls are only listed there.

Hidden and variable costs. There are no usage charges in the published plans. The real cost is time: the shortcut-driven workflow takes practice, and drafts still need review. If you connect Mail MCP to Claude or ChatGPT, those subscriptions are separate.

Superhuman Mail Compared With Shortwave, Fyxer and Inbox Zero

All four put AI on top of an existing mailbox. They differ on price, how far automation goes and whether you change email clients.

Superhuman is the most expensive of the four and the most polished as a client. Fyxer suits people who do not want to leave Gmail or Outlook. Shortwave and Inbox Zero cost less, and Inbox Zero is the only one you can run on your own servers. For a broader assistant that also handles calendars across up to six accounts, see alfred_. More options are on our email agents page. The practical test is simple: pay for Superhuman if you want the best client; pick Inbox Zero for the lowest monthly cost or control over hosting; pick Fyxer if you want no new app at all.

Inbox-Heavy Executives and Sales Leaders

• Executives and founders: people who receive hundreds of messages a day get the most from auto labels, drafts and reminders.
• Sales leaders: Business connects to HubSpot and Salesforce and shows a Recent Opens feed.
• Keyboard-first workers: reviewers repeatedly praise the speed of the shortcut workflow.
• Security-conscious buyers: SOC 2 Type 2, GDPR and a no-training pledge for external models are documented.

Light Email Users and Anyone Wanting Auto-Sent Replies

• Light email users: $30 to $40 a month is easier to justify for a busy inbox than a small one.
• People who want replies sent for them: drafts wait for review; an outbound tool such as Instantly AI Reply Agent can reply on autopilot for cold email.
• Buyers who need a free tier: Superhuman offers a 30-day trial rather than a free plan.
• Teams that prefer to stay in their current client: tools that work inside Gmail or Outlook avoid retraining.

AI Features Included on the Business Plan

Check which plan carries the features you are buying. Auto Drafts, Ask AI and Custom Auto Labels are listed on Business, not Starter, so a trial on the wrong plan will understate the AI.

Expect a learning period. Capterra reviewers describe a learning curve for the shortcuts and setup, and a few mention the muted design or features they would like added, such as a unified inbox. Some reviewers also comment on the price, particularly outside the US.

Think about where your mail goes. Superhuman states SOC 2 Type 2 certification and says data is never used to train external AI models, but connecting the Mail MCP to another AI tool means that tool reads and can send mail under its own terms.

Team rollouts need planning. Shared conversations and comments are included from Starter, but admins who need SSO or advanced controls must move to Enterprise, which is quoted. Check how offboarding works for departing staff and who owns labels and rules across the team.

Finally, the corporate picture is still settling. Superhuman Mail now shares a company with Grammarly, Coda and Superhuman Go, and bundles or plan names may change as the suite comes together.

Grammarly Becomes Superhuman in October 2025

On October 30, 2025, Grammarly rebranded as Superhuman, keeping Grammarly, Coda and Superhuman Mail as products and launching Superhuman Go, a proactive assistant that works across more than 100 apps.

Worth the Money for Heavy Emailers Who Can Expense It

For heavy email users who can expense it, yes. Superhuman Mail scores 8.6/10 on our scale. It does a lot before you open the inbox: labels, archives, follow-up reminders and drafted replies, with a strong security story and a 4.8 rating from Capterra reviewers.

It scores lower on price because the core agent costs $40 a month per user and there is no free plan, and on autonomy because replies always wait for you to send them. If you want similar drafting at a lower price, try Shortwave or Inbox Zero; if you want AI without a new client, try Fyxer. Use the 30-day trial on the Business plan and measure how many drafts you send with light edits.

Superhuman Plans and AI Features, Briefly Answered

How Much Does Superhuman Mail Cost?

Starter is $30 a month or $300 a year, and Business is $40 a month or $396 a year. Enterprise is quoted. There is a 30-day trial.

Which Superhuman Plan Includes Auto Drafts?

Business. Superhuman lists Auto Drafts, Ask AI and Custom Auto Labels on the Business plan, while Starter includes most other AI features.

Does Superhuman Send Emails Automatically?

Not inside the client. It drafts replies and follow-ups for you to review and send. Outside AI tools connected through Mail MCP can send mail when you tell them to.

Does Superhuman Work With Outlook?

Yes. Superhuman Mail works with Gmail and Outlook accounts, and you can connect more than one account.

Can Superhuman Mail Connect to Claude or ChatGPT?

Yes. Superhuman offers a Mail MCP server that connects your inbox to Claude, ChatGPT and other AI tools. Those tools can then search messages, summarize threads, draft and send replies, and manage follow-ups and meetings when you ask them to, so set their permissions with care.

Is Superhuman Mail Part of Grammarly?

It belongs to the same company. Grammarly’s parent renamed itself Superhuman in October 2025, and Superhuman Mail, Grammarly and Coda are now products of that company.