Mastra vs Letta (2026) — Which Is Better?
Comparing Mastra and Letta side by side to help you choose the right AI tool for your needs. Mastra: TypeScript framework for building AI agents Letta: Letta is an AI tool.
Mastra
TypeScript framework for building AI agents
Mastra is free to use.
Mastra Key Features
- TypeScript-native AI framework
- Workflow and agent primitives
- Knowledge base integration
- Multiple LLM provider support
- Built-in evaluation tools
Best Mastra Use Cases
- Building AI agents in TypeScript
- Production AI application development
- Workflow automation with AI
- Full-stack AI development
View full Mastra profile · Mastra alternatives · All Developer Tools AI Tools
Letta
Letta offers a free plan with paid tiers for advanced features.
View full Letta profile · Letta alternatives · All LLM AI Tools
Pricing Comparison: Mastra vs Letta
Mastra: Mastra is free to use.
Letta: Letta offers a free plan with paid tiers for advanced features.
Frequently Asked Questions
Which is better: Mastra or Letta?
The best choice between Mastra and Letta depends on your use case. Mastra — TypeScript framework for building AI agents. Letta is an AI tool with its own strengths. Compare pricing and features above to find the best fit for your workflow.
Is Mastra free?
Mastra is free to use.
Is Letta free?
Letta offers a free plan with paid tiers for advanced features.
What are the best alternatives to Mastra and Letta?
Explore Mastra alternatives and Letta alternatives on Nextool.ai for more options.