Versus Engine
Devin vs Mastra
Specs, price and the one trade-off that actually decides it — Devin against Mastra, side by side.
Cheaper to start
Tie
Both start at a similar price.
Best ecosystem
Devin
3 native integrations vs 0.
Standout
Devin
Autonomous Planning
Devin
The first fully autonomous AI software engineer capable of planning and executing complex code workflows.
Where it wins, where it doesn't
Pros
- Reduces engineering backlog
- End-to-end task execution
Cons
- High initial cost
- Limited to specific tech stacks initially
Mastra
Opinionated, strongly-typed agent framework for Next.js and TypeScript.
Where it wins, where it doesn't
Pros
- Native TypeScript with genuinely useful type safety
- Integrates cleanly with Next.js
- Telemetry built in rather than bolted on
Cons
- Young ecosystem — few answers exist for unusual problems
- API surface has shifted between minor versions
- Opinionated structure fights you if your architecture differs