Devin
FreeAn autonomous AI software engineer by Cognition Labs.
FreeFree tier
Inputs: codeOutputs: code
About Devin
Devin is an autonomous AI software engineer developed by Cognition Labs. It can independently handle complex software engineering tasks such as large-scale code migrations, refactoring, and modernizations by breaking down problems into subtasks and executing them autonomously. As demonstrated in a case study with Nubank, Devin achieved an 8x efficiency gain and 20x cost savings by migrating over 100,000 data class implementations across millions of lines of code. Devin offers a range of plans from a free tier with light quota to enterprise options, with features including tab completions, inline edits, access to the SWE 1.7 model, and integration with popular development tools.
Key Features
Autonomous code migration and refactoring
Fine-tuning for custom migration tasks
Handles millions of lines of code
Integrates with Slack, Teams, Linear, Jira, GitHub, GitLab, Bitbucket
Devin Cloud for cloud-based agent execution
DeepWiki for codebase understanding
Unlimited inline edits and Tab completions
SWE 1.7 model and leading open-source models
Concurrent sessions up to 10 on Pro plan
SAML/OIDC SSO and enterprise admin controls on Enterprise plan
Pros & Cons
Pros
- Significant reduction in engineering hours (e.g., 8x efficiency gain)
- 20x cost savings on large migrations
- Handles complex, non-scriptable tasks autonomously
- Keeps a human in the loop for project management and approval
- Offers a free plan to get started
Cons
- Free plan has limited model availability and light usage quota
- Pro plan costs $20/month, may be costly for heavy usage
- Dependency on cloud agents (Devin Cloud) on some plans
- Fine-tuning requires existing manual migration examples
Best For
Large-scale code migrations (e.g., monolith to sub-modules)Repetitive refactoring tasks across thousands of filesModernizing legacy codebasesAutomating software engineering subtasks with human approval
FAQ
How does usage work?
Each paid plan comes with a usage allowance that refreshes automatically daily and weekly. Cost per message varies based on model, task size, complexity, and reasoning required.
What happens when I reach my usage limit?
Most users never hit their limits. If exceeded on a paid plan, extra usage can be purchased at API pricing.
What is the Max plan?
The Max plan is for power users who need significantly higher usage quotas than the Pro plan.
What is included in the Free plan?
The Free plan includes a light quota to code with agents, limited model availability, unlimited inline edits, and unlimited Tab completions.
Is Devin open source?
No, Devin is a commercial product by Cognition Labs with a free tier and paid plans.