Superhuman vs Grammarly
Plans, free access, limits and intended use side by side, taken from each vendor’s own pages. No score and no winner: the facts show where the two differ.
Change tools
AI email app, agent assistant and workspace from the company that now includes Grammarly
Real-time grammar, tone and AI writing help inside the apps where you already type.
- Free access
- Superhuman: Free access
- Grammarly: Free access
- Paid from
- Superhuman: USD 12 per member a month billed annually; $15 billed monthly
- Grammarly: USD 12 per member per month
- Plans listed
- Superhuman: 5
- Grammarly: 3
- Public API
- Superhuman: Not confirmed
- Grammarly: Not confirmed
Where Superhuman and Grammarly differ
- PlansSuperhuman lists 5 plans and Grammarly lists 3.
Head to head
Each value from the tool’s profile and the vendor’s own pages
| Superhuman | Fact | Grammarly |
|---|---|---|
| Access and price | ||
| Free access availableFree · USD 0 | Free accessSame | Free access availableFree · USD 0 |
| USD 12 per member a month billed annually; $15 billed monthlyPro | Lowest listed paid plan | USD 12 per member per monthPro · billed yearly · USD 30 billed monthly |
| Free plan without Mail; Mail from $25 a member a month; Business $33 | Pricing model | Free plan; Pro from USD 12; Enterprise custom |
| 5 | Plans listedDiffers | 3 |
| Not confirmed | Public API | Not confirmed |
| Not confirmed | Card to start | Not confirmed |
| Not confirmed | Open source | Not confirmed |
| What it is for | ||
| Teams that live in Gmail or Outlook and will pay per seat to triage email faster, or individuals who want a free AI assistant across apps | Built for | Correcting and polishing everyday writing |
| Writing & content | CategorySame | Writing & content |
| Platforms |
|
| Works with |
|
| How current | ||
| Profile sources checked | ||
| Prices confirmed · Oct 6, 2026 | Pricing checkSame | Prices confirmed · Sep 26, 2026 |
Official source check for both tools. No hands-on testing and no score: “Differs” marks a documented difference, not a better tool.
Plans and prices
Superhuman
Prices confirmed · Oct 6, 2026- FreeUSD 0
- ProUSD 12 per member a month billed annually; $15 billed monthly
- Mail StarterUSD 25 per member a month billed annually
- BusinessUSD 33 per member a month billed annually; $40 billed monthly
- EnterpriseCustom; contact sales
Grammarly
Prices confirmed · Sep 26, 2026- FreeUSD 0EUR 0 shown
- ProUSD 12 per member per monthbilled yearly · USD 30 billed monthly
- EnterpriseContact provider
Strengths and limits
Superhuman
Strengths
- Mail is built around speed on Gmail and Outlook: The Mail page lists triage, follow-up reminders, Snippets, shortcuts and team comments in one app rather than as add-ons.
- A real free entry point: The plans page lists Free at $0 with chat across apps, writing help in 20+ languages and collaborative Docs.
- Business adds CRM views: The plans page says Business shows and updates HubSpot, Salesforce and Pipedrive records from the inbox.
Limits to plan around
- Free does not include Mail: On the plans page Mail is marked on Business and Enterprise only, so the email app is not part of the $0 or Pro plans.
- Two pages describe the Business price differently: The Mail pricing page says Business is $33 with 15% off for teams of 5+; the plans page shows $33 billed annually and $40 monthly without that note.
- Mail trial terms were not found: The pages read do not state whether Mail has a free trial, its length or what happens after it.
Grammarly
Strengths
- Works where you already write: The same suggestions run in browser extensions, desktop apps, Office and Google Docs add-ins and mobile keyboards.
- Usable free tier: Free has no time limit and includes spelling, grammar, tone detection and a monthly prompt allowance.
- Flexible Pro billing: Pro can be paid monthly, quarterly or yearly per member, and a team account can grow to 149 seats.
Limits to plan around
- Refunds only where law requires: You can cancel at any time, but paid time is refunded only when local law requires it.
- Review agents are paid: Plagiarism Checker, AI Detector and Citation Finder need Pro, and Free gets a single AI Grader scan a day.
- Own rewrites can trip the detector: Text rewritten by Grammarly's agents is likely to be flagged by its AI Detector.
See both products
Start from your task, not from a winner.
Run both tools on the same real task, then compare the result, how much editing it needs and how fast it uses your plan’s allowance.
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Comparing tools from different categories is fine, and often useful — a writing assistant and a research tool solve different halves of the same job. The table will show you exactly where they diverge.
Questions about comparing tools
How does the comparison work?
Add two tools to the comparison tray from any tool card, then open this page. The table pulls each tool's verified plan details, platforms, strengths and limits from its profile, so both columns carry the same kind of evidence, with a separate source-check date for each tool.
Do you declare a winner?
No. The table sets two tools against each other on documented facts, not on a score. Which one wins depends on your task, your budget and your usage volume — three things we cannot see from here.
Why are some cells empty or marked unverified?
Because we could not confirm that detail on the vendor's own pages. Rather than filling the gap with a figure from elsewhere, we mark it and say why on the tool's profile.
Can I compare more than two tools?
Not at once. Two columns keep the differences readable and force a real decision. Remove either selected tool to replace it, or clear both to start a new pair.
Every figure in the table above comes from the linked profile, where the source and the verification date are listed. Browse all tools or read the editorial policy.