kitio.aiCompose AI vs Letterbot
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Compose AI starts at See pricing page and Letterbot starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Autocomplete in any text field
- Email and document generation
- Personal writing style
- Chrome extension
- Notes to email
- Reply generation
- Thread summaries
- Grammar fix
- 9 tones and 13 languages
| Feature | Compose AI | Letterbot |
|---|---|---|
| Best for | Chrome extension that autocompletes your sentences wherever you type | Gmail add-on that turns rough notes into finished emails |
| Category | Writing | Writing |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | Yes | Yes |
| Made by | Compose AI | Letterbot |
| Based in | United States | Germany |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Compose AI starts at See pricing page and Letterbot starts at See pricing page. Check both pricing pages for current plans.
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 Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Compose AI
- Free version with no time limit
- Works across many web apps
- Adapts to your writing voice
- Chrome only
- Personalization needs the premium plan
- Premium pricing not shown in the evidence
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 Compose AI if you want:
- Free version with no time limit
- Works across many web apps
- Adapts to your writing voice
Watch out: chrome only.
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.
Compose AI vs Letterbot FAQ
What is the difference between Compose AI and Letterbot?
Compose AI: Chrome extension that autocompletes your sentences wherever you type. Letterbot: Gmail add-on that turns rough notes into finished emails. Both are writing tools.
Is Compose AI or Letterbot cheaper?
Compose AI starts at See pricing page and Letterbot starts at See pricing page. Check both pricing pages for current plans.
Do Compose AI and Letterbot have free plans?
Compose AI: Yes. Letterbot: Yes.
Who makes Compose AI?
Compose AI is made by Compose AI, based in United States.
Who makes Letterbot?
Letterbot is made by Letterbot, based in Germany.
Which should I choose, Compose AI or Letterbot?
Choose Compose AI if you value free version with no time limit and works across many web apps. Choose Letterbot if you value works directly inside gmail and very low-cost paid plan.