Head to head · Productivity · updated Oct 26, 2026
Grammarly vs Superhuman
Grammarly scores 45 to Superhuman's 33 on public evidence for email writing & inbox management, and they rank #3 and #4 there. Only Grammarly has a free tier. Numbers below are the same public signals the ranking uses, recomputed nightly — nothing here is sponsored.
Grammarly
A writing assistant that checks grammar, tone and clarity everywhere you type and rewrites or drafts text on request.
+ Works in nearly every text field on every platform, so corrections and tone suggestions follow you into Gmail, Slack and Word.
− Suggestions can flatten a distinctive voice and the premium nag prompts in the free tier are constant.
Superhuman
A keyboard-driven email client for Gmail and Outlook with AI drafting in your voice, inbox triage and auto-summaries.
+ Write with AI learns your sent mail and produces replies that sound like you, and Auto Summarize puts a one-line gist atop every thread.
− Expensive for an email client, and it only works on Gmail and Microsoft 365 accounts.
Side by side
public evidence| Grammarly | Superhuman | |
|---|---|---|
| Evidence score / 100 | 45 | 33 |
| GitHub stars | closed source | closed source |
| Hacker News stories, 30d | 1 | 4 |
| Release-feed mentions, 30d | 0 | 0 |
| Last activity | – | – |
| Pricing | Free tier · Pro from $12/mo billed annually | Paid · Starter from $25/mo |
| Platforms | web, mac, windows, ios, android, chrome-extension | web, mac, windows, ios, android |
| Maker | Grammarly | Superhuman (Grammarly) |
Which one?
Pick Grammarly if
- you want the stronger public evidence (45 vs 33)
- you want a free tier to start on
- you need it on chrome-extension
Best for everyday grammar and tone checking.
Pick Superhuman if
Write with AI learns your sent mail and produces replies that sound like you, and Auto Summarize puts a one-line gist atop every thread.
Best for high-volume inboxes.