Superhuman AI vs Notion AI vs Otter.ai vs Grammarly
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
Superhuman AI
Keyboard-fast AI email client, now folded into Superhuman Suite.
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Notion AI
AI writing, summarisation, and Q&A built directly into your Notion wor...
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Otter.ai
Meeting transcription and AI notes
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Grammarly
AI writing assistant that checks grammar, style, tone, and clarity acr...
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| RECATOOLS Score | 7 / 10 | 7 / 10 | 7.3 / 10 | 7.8 / 10 |
| Capability | ||||
| Value for money | ||||
| Ease of use | ||||
| ASEAN readiness | ||||
| API quality | ||||
| Pricing | Paid | Paid | Freemium | Freemium |
| Free tier | 30-day free trial | 20 free AI responses to trial the feature | 300 minutes per month transcription, 3 lifetime audio/video file imports (permanent cap, not monthly), 30-minute cap per conversation | Basic grammar and spell checking, limited suggestions |
| Paid from | $30/month | $20/user/month (Business, billed annually) — the plan that bundles full Notion AI; Plus | $16.99/month (Pro) | ~US$12/month (Premium, billed annually) |
| Has API | ✗ | ✗ | ✓ | ✗ |
| Open source | ✗ | ✗ | ✗ | ✗ |
| Free to use | ✗ | ✗ | ✗ | ✓ |
| Users | 75000+ paying subscribers | 100M+ total users; 4M+ paying customers (AI is gated to Business/Enterprise) | 35m+ users | over 40 million daily active users (2025) |
| Founded | 2014 | — | 2016 | 2009 |
| Maker | Rahul Vohra | Notion Labs | Sam Liang, Yun Fu | Alex Shevchenko, Max Lytvyn, Dmytro Lider |
| Verdict | Superhuman built its name as the fastest keyboard-driven email client, and that muscle memory is still the appeal: split inboxes, instant send, AI triage and auto-drafted replies pulled from your own writing style. What... |
Notion AI's advantage is context: it drafts, summarises, and answers questions across the docs, wikis, and databases you already keep in Notion, plus connected tools like Slack and Drive — no copy-paste. Custom Agents (F... |
Otter.ai remains the most recognizable AI meeting-assistant, with OtterPilot joining Zoom, Teams, and Google Meet calls to transcribe, diarize speakers, and generate summaries and action items. Real-time English transcri... |
Grammarly is still the most established writing assistant: reliable mechanics checking, tone and clarity suggestions, and generative rewriting embedded nearly everywhere you type. The core product survived the October 20... |
| Full review → | Full review → | Full review → | Full review → |
Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.