Devin vs Letta: Which is Better in 2026?
Choosing between Devin and Letta comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Devin
AI software engineer by Cognition Labs
Best for you if:
- • You need AI coding features specifically
- • Devin is an AI software engineer that can autonomously write, test, and deploy code
- • It handles complex engineering tasks from planning to implementation in a sandboxed environment
Letta
Build AI agents that learn and improve from experience
Best for you if:
- • You want to try before committing
- • You need AI agents features specifically
- • Develops AI agents with continuous learning and self-improvement capabilities.
- • Focuses on solving AI's memory problem for more human-like agents.
| At a Glance |  Devin |  Letta |
|---|---|---|
Starts at | $20/monthCore | FreeFree tier available |
Best For | AI Coding | AI Agents |
Rating | - | - |
Free plan | No | Yes |
Choose Devin or Letta?
Choose Devin if
AI software engineer by Cognition Labs
- AI software engineer
- End-to-end tasks
- Good for automation
- Your work is AI coding-shaped, not AI agents-shaped
Choose Letta if
Build AI agents that learn and improve from experience
- Addresses a critical limitation in current AI: memory and continuous learning.
- Provides developer tools for building advanced, adaptive AI agents.
- Backed by significant research and expertise from leading AI institutions.
- Your work is AI agents-shaped, not AI coding-shaped
| Feature | Devin | Letta |
|---|---|---|
| Pricing Model | Paid | Freemium |
| User Rating | No ratings yet | No ratings yet |
| Categories | AI CodingAI Agents | AI AgentsDeveloper Tools |
In-Depth Analysis
Devin
AI software engineer by Cognition Labs
Strengths
- +AI software engineer
- +End-to-end tasks
- +Good for automation
- +Innovative approach
- +Active development
Weaknesses
- -Waitlist/limited access
- -Expensive
- -Accuracy varies
- -Not replacement for devs
- -Early stage
Key features
Letta
Build AI agents that learn and improve from experience
Strengths
- +Addresses a critical limitation in current AI: memory and continuous learning.
- +Provides developer tools for building advanced, adaptive AI agents.
- +Backed by significant research and expertise from leading AI institutions.
- +Emphasizes open AI principles and developer empowerment.
Weaknesses
- -The technology is highly specialized, potentially requiring advanced AI development knowledge.
- -Specific pricing and availability details for products like the SDK are not readily apparent.
- -The focus on foundational research means some applications may still be emerging.
Key features
Pricing: Devin vs Letta
| Plan | Devin | Letta |
|---|---|---|
| Tier 1 | $20 month Core | $0 /month Free |
| Tier 2 | $500 month Team | $20 /month Pro |
| Tier 3 | custom Enterprise | Contact us Teams / Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Devin pricing and Letta pricing.
Who Should Use What?
On a budget?
Letta has a free tier. Devin is paid only.
Go with: Letta
Want the highest-rated option?
Neither has ratings yet.
Too early to call on ratings — compare on features and pricing.
Value user reviews?
Neither has ratings yet.
Too early to call — neither has ratings yet.
3 Questions to Help You Decide
What's your budget?
Devin is paid. Letta is freemium. Letta lets you start free.
What's your use case?
Devin is a AI coding tool. Letta is in AI agents. Pick the category that matches your needs.
How important are ratings?
Neither has ratings yet.
Key Takeaways
Devin
- Our pick for this comparison
Letta
- Has a free tier
- Better fit for AI agents
The Bottom Line
Devin is our pick. Letta has a free tier if you want to test without paying.
Frequently Asked Questions
Is Devin or Letta better?
Devin is rated in our evaluation. Devin is paid and Letta is freemium.
What are Devin and Letta used for?
Devin: AI software engineer by Cognition Labs. Letta: Build AI agents that learn and improve from experience.
What does Devin cost vs Letta?
Devin is a paid tool. Letta is freemium (free tier + paid plans). Visit their websites for detailed pricing.