kitio.aiHiwriter vs Letterbot
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Hiwriter is completely free, while Letterbot is freemium.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Email draft generation
- Thread-aware replies
- Tone and style selector
- Built-in translation
- Regenerate variations
- Notes to email
- Reply generation
- Thread summaries
- Grammar fix
- 9 tones and 13 languages
| Feature | Hiwriter | Letterbot |
|---|---|---|
| Best for | Gmail add-on that drafts emails and replies with GPT | Gmail add-on that turns rough notes into finished emails |
| Category | Writing | Writing |
| Pricing model | Free | Freemium |
| Starting price | Free | See pricing page |
| Free plan | Yes, fully free | Yes |
| Made by | Rebump | Letterbot |
| Based in | – | Germany |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Hiwriter is completely free, while Letterbot is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- 5 requests a day
- Write, reply, subject and summary
Basic
€3.99/mo
- 100 requests a day
- All 6 writing tools
- Grammar fix and sales writer
Professional
€19.99/mo
- 800 requests a day
- Priority AI processing
Prices in USD, checked Nov 5, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Hiwriter
- Works inside Gmail on mobile too
- Translates drafts before sending
- Free to install
- Only works with Gmail
- Runs on the older GPT-3.5 model
- Improve feature still marked as coming soon
Letterbot
- Works directly inside Gmail
- Very low-cost paid plan
- Only runs when you click a tool
- Free plan allows 5 requests a day
- Prices only listed in euros
- Native integration limited to Gmail
Which one should you choose?
Choose Hiwriter if you want:
- Works inside Gmail on mobile too
- Translates drafts before sending
- Free to install
Watch out: only works with gmail.
Choose Letterbot if you want:
- Works directly inside Gmail
- Very low-cost paid plan
- Only runs when you click a tool
Watch out: free plan allows 5 requests a day.
Hiwriter vs Letterbot FAQ
What is the difference between Hiwriter and Letterbot?
Hiwriter: Gmail add-on that drafts emails and replies with GPT. Letterbot: Gmail add-on that turns rough notes into finished emails. Both are writing tools.
Is Hiwriter or Letterbot cheaper?
Hiwriter is completely free, while Letterbot is freemium.
Do Hiwriter and Letterbot have free plans?
Hiwriter: Yes, fully free. Letterbot: Yes.
Who makes Hiwriter?
Hiwriter is made by Rebump.
Who makes Letterbot?
Letterbot is made by Letterbot, based in Germany.
Which should I choose, Hiwriter or Letterbot?
Choose Hiwriter if you value works inside gmail on mobile too and translates drafts before sending. Choose Letterbot if you value works directly inside gmail and very low-cost paid plan.