Grais vs Superhuman Go (2026)

Superhuman Go is made by Superhuman Platform Inc., the company that was Grammarly Inc. until it rebranded on 29 October 2025. Grammarly is now one agent inside a suite that also holds Superhuman Docs, Superhuman Mail and Go. Go itself is the overlay: a browser extension, a desktop app and a mobile app that puts agents on top of whatever you already have open.

Reach is the real headline. Superhuman says Go works across more than a million websites and apps, because the model is text fields rather than a curated list of sites. It ships as a Chrome and Edge extension, as Mac and Windows apps, on iOS, and as a web app, with Android listed as coming soon. The Grammarly browser page counts 40 million people and 50,000 organizations.

The price ladder sits well below ours. Free is $0 and includes Go chat in every application and tab, capped at 100 AI prompts per month. Pro is $12 per member per month billed annually, or $15 month to month, and it is the lowest tier that can connect work apps and build custom agents. Grais starts with 20 free actions a week, then Core at $29.

The writing help is also the thing this company has been doing longest. That means real-time grammar, punctuation and word-choice review, with full-sentence rewrites and tone adjustment on Pro and above, and mistake-free writing in six languages on the free plan. Grais does not do that work and does not claim to.

• The work is documents and email. Go is aimed at professional written output, and it sits inside Google Docs, Gmail and Outlook.
• The context lives in work systems. Connectors pull live data from Salesforce, HubSpot, Jira, GitHub, Confluence and Zoom while you write.
• You need admin and security controls. Enterprise adds SAML SSO, SCIM, data loss prevention, audit logs and BYOK encryption. Grais publishes none of that.

Grais is not an overlay on everything you type. It reads the one conversation you have open, whether that is a WhatsApp Web thread, a LinkedIn message or a Telegram chat, and drafts the next message to that specific person in your voice. The unit of work is a relationship, not a document.

That changes what the assistant has to know. Superhuman states on its own agents page that by default agents do not retain information between sessions or across different agents. What stands in for memory is retrieval: connectors pull live context from Gmail, Jira or Salesforce at the moment you type. Grais holds the other half, which is recall. It keeps context across conversations, channels and time, covering who said what, what was promised and what matters to this person, so a thread you left three weeks ago on a different app is still in the room.

Two things follow from that. Promise tracking means the assistant knows what you committed to whom, rather than re-reading the last screen. And because the memory is per person rather than per window, the same human on WhatsApp, LinkedIn and Telegram is one relationship with one history, which is also what lets Grais flag when that person has gone quiet.

The control model differs in the same direction. The control Superhuman describes for connectors is a per-tool Always Allow or Needs approval toggle in connector settings, often set by an admin rather than per conversation. Grais sets trust per contact. It starts at review, can move to voice approval, and can reach known-safe autonomy for the people where that has been earned. Nothing is sent or changed without the trust level you set for that contact.

The honest part. Grais is a desktop Chromium extension, covering Chrome, Brave, Edge and Arc on macOS, Windows, Linux and ChromeOS. There is no mobile browser, no Firefox and no Safari. iOS is on TestFlight rather than the App Store, and the Mac app is planned rather than shipped. If breadth of surfaces is what decides it, Go wins that outright.

These two are not competing for the same minute of the day. The centre of gravity for Go is the document, the email and the ticket, with context retrieved from systems of record. For Grais it is the thread with one person, with context that accumulates in the relationship.

Superhuman documents a per-site switch for anyone running both: the Go extension can be turned off for a particular website. Grais only activates on the five sites it supports, so the overlap is small to begin with.