AI writing assistants (ai writing) , by AI21 Labs , since 2020
Wordtune
Sentence-level AI rewrite and summarizer built on AI21 Labs' language models
- WEB
- EXTENSION
- PLUGIN
- MOBILE
What Wordtune does
Browser-extension and web tool that rewrites sentences for tone/clarity, offers AI summarization, and checks spelling/grammar, built by AI21 Labs. Aimed at quick editing rather than long-form generation.
What you get: Sentence rewriter, AI summarizer, Tone/formality shifting, Grammar & spelling check.
Typical jobs: Polishing individual sentences/emails; Quick article summarization; Non-native English editing.
What users complain about: The 10 daily rewrites on the free version are 'very limited and can be used up in minutes' (Eesel.ai Wordtune review)
Pricing and plan limits
Verified August 2026| Plan | Monthly | Annual (per mo) | Limits |
|---|---|---|---|
| Basic (Free) | Free | Free | 10 rewrites/AI suggestions per day, 3 AI summarizations/month, unlimited spelling/grammar checks |
| Advanced | $6.99 | $58.68 | 30 rewrites/AI suggestions per day, 15 AI summarizations/month |
| Unlimited | $9.99 | $83.88 | Unlimited rewrites, suggestions, and summarizations |
Where it wins
- Simple, fast sentence-level rewrite suggestions with minimal learning curve
- Among the cheapest unlimited tiers ($9.99/mo, or $6.99/mo annual) in the rewrite-tool category
- Built on AI21 Labs' language models with strong sentence-fluency output
Where it falls short
- Free plan's 10 daily rewrites can be exhausted within minutes of use
- Billing issues and technical glitches flagged across multiple Trustpilot reviews
- No long-form or bulk content generation, it's an editing/paraphrasing tool, not a drafting tool
How we scored it
Full methodology| Criterion | Weight | Score | Contribution |
|---|---|---|---|
| Capability | 30% | 6.5 | 1.95 |
| Value for money | 25% | 6.0 | 1.50 |
| Ease of use | 15% | 8.5 | 1.27 |
| Maturity | 15% | 7.0 | 1.05 |
| Support & docs | 10% | 6.0 | 0.60 |
| Momentum | 5% | 5.0 | 0.25 |
| Weighted total | 100% | 6.6 | 6.60 |
Alternatives to Wordtune
Chosen by editors, not sponsors
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