Superhuman AI: What It Means Now That It's Four Products
Superhuman AI does not refer to one product anymore. After Grammarly bought Superhuman and took the name for the whole company, “Superhuman” became an umbrella over four things: Mail, Grammarly, Docs, and Go. Each has its own AI, its own price, and its own answer to the question you are probably actually asking, which is whether any of it will handle your email without you.
Most articles about Superhuman AI still describe a $30 email app. That is one quarter of the current picture, and not the quarter Superhuman is investing in.
The four products
| Product | What it is | What its AI does |
|---|---|---|
| The keyboard-driven email client Superhuman is known for | Ask AI, auto drafts, auto labels, AI writing in your voice | |
| Grammarly | The writing assistant, now a sibling rather than the parent brand | Tone, clarity and correctness wherever you write |
| Docs | The team document and knowledge product | Drafting, tracking, and workflows inside the doc |
| Go | A proactive assistant that rides along in your browser | Suggests next steps and takes actions across your other apps |
Superhuman’s own footer also lists Calendar and Databases, so the suite is still growing. If you searched “Superhuman AI” expecting an email feature list, the honest answer is that you have landed on a platform, and which piece you want depends on whether your problem is writing, reading, or doing.
What Superhuman Mail’s AI costs, and where the good part sits
Mail is sold per member, and the AI you probably came for is not on the cheaper plan.
| Plan | Billed monthly | Billed annually |
|---|---|---|
| Starter | $30 / member / mo | $25 / member / mo |
| Business | $40 / member / mo | $33 / member / mo |
| Enterprise | Contact sales | Contact sales |
Starter includes “Superhuman AI” as a line item, which is easy to read as the AI. It is not. Ask AI, auto drafts, custom auto labels, CRM integrations, and the Superhuman Mail MCP server are all Business-tier features. Superhuman describes Business as “our most advanced AI,” and the practical translation is that the entry plan gets assisted writing while the tier above it gets the assistant.
That matters for a $10 monthly gap. If your reason for looking at Superhuman is “I want something to triage and draft for me,” Starter is not the plan that does it.
Superhuman Go is free, and that is the interesting part
Go is the newest piece and the one that behaves least like an email app. Superhuman calls it “the proactive AI assistant that knows what you know and offers help without you even having to ask.” It connects to 100+ apps, and there is an Agent Store with agents for Gmail, Google Calendar, Jira and more, plus an Agents SDK in closed beta.
Pricing is the surprise: Go is included in every Superhuman plan, and you can start using it free by signing up for a Superhuman account. For a category where every competitor charges for the agent layer, giving it away is a deliberate move.
The examples Superhuman uses are worth reading closely, because they define the shape of the product:
- You are answering an urgent customer email, and Go pulls in account details and support tickets while polishing your tone.
- You are deep in a chat thread that needs a meeting, and Go finds the details and books it.
- You are prepping for a 1:1, and Go reminds you what you promised last time.
Every one of those begins with you, already in the app, already doing the thing.
The limit hiding in the install instructions
Go ships as a Chrome extension and an Edge extension. A desktop app for Mac and Windows is listed as coming soon.
That single detail sets the boundary for the whole product. An extension runs inside a browser tab you have open. “Proactive” here means Go watches the context you are working in and offers help a half step before you ask, which is genuinely useful and noticeably better than a chat box you have to visit. What it cannot mean is that something happens while your browser is closed.
So Superhuman Go is proactive within your session, and inert outside it. Close the laptop and nothing triages, nothing chases, nothing files. That is not a knock on the engineering. It is what a browser extension is.
Where Superhuman meets ChatGPT and Claude
Superhuman has done more here than most email apps.
Superhuman Mail runs an MCP server, on the Business plan, which is what lets an outside assistant reach your mail as a set of tools rather than a screen to scrape. Docs advertises 800+ tool connections and says plainly that it “works with Claude, ChatGPT, Cursor, and more.”
That is the right architecture, and it is worth knowing that connecting an assistant to your mail through MCP gives it reach, not initiative. An MCP connection is a set of tools a model can call during a conversation you started. It does not give ChatGPT or Claude a reason to wake up when a message lands.
What still has to start with you
Put the four products together and the same gap runs through all of them. Mail’s AI drafts when you open Mail. Go suggests when you are in the tab. Docs helps inside the document. The assistant is excellent at the moment of work and absent between moments of work.
That leaves the recurring half of a job uncovered: the follow-up nobody sent, the lead that came in at 11pm, the invoice that has been unpaid for thirty days, the weekly report somebody has to remember to build.
Carly is built for that half. It runs in the cloud on triggers rather than in a tab, so the work starts on an event or a schedule with nothing of yours open. It connects natively to 260+ apps across 45+ categories, and anything else with a public API through your own key pasted at carlyassistant.com/integrations. Carly also has its own email address, so a client or a teammate can hand it work directly.
In practice that looks like:
- When a lead emails you, enrich them, create the CRM record, and reply with a booking link.
- When a deal moves to closed won, build the onboarding doc, post it to Slack, and schedule the kickoff.
- Every Friday at 4pm, pull the week’s pipeline and send the summary.
Carly is free for Zapier-style workflows, with AI agents from $35/month. It also runs an MCP server, so a Superhuman or ChatGPT session can call Carly’s email, calendar, CRM and booking tools and actually complete an action.
The two fit together rather than compete: Superhuman makes the hour you spend in your inbox faster, and Carly covers the twenty-three hours you are not in it.
If you want the wider field, Superhuman alternatives has the comparison, and Superhuman pricing goes deeper on the plans.
FAQ
Is Superhuman AI free? Superhuman Go is free and included in every plan, so you can use that part without paying. Superhuman Mail is not free: it starts at $30 per member per month billed monthly, or $25 billed annually.
What is the difference between Superhuman Mail and Superhuman Go? Mail is an email client. Go is a browser extension that works across the web apps you already use, connecting to 100+ apps and offering suggestions and actions in context. You can use Go without using Mail.
Which Superhuman plan has Ask AI? Business, at $40 per member per month billed monthly or $33 annually. Ask AI, auto drafts, custom auto labels, CRM integrations, and the Superhuman Mail MCP server are all above the Starter tier.
Does Superhuman work with ChatGPT? Yes, in the sense that Superhuman Mail exposes an MCP server on Business and Superhuman Docs states it works with Claude, ChatGPT and Cursor. That gives an assistant tools it can call during a session you start, not the ability to act on its own.
Can Superhuman Go run when my browser is closed? No. Go ships as a Chrome and Edge extension, with a desktop app listed as coming soon, so it works inside an open browser. For work that has to happen while you are away, you need something that runs server-side on a trigger, such as Carly.
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