DSPy is free, with no paid plan attached. Mastra is free, with no paid plan attached. Both are listed under Agent Frameworks (Developers), so this is a like-for-like comparison. Neither is ranked above the other — Flocci carries no sponsored placement.
DSPy is free, with no paid plan attached and is listed for open-source (MIT) framework from Stanford NLP, 37k+ GitHub stars. Mastra is free, with no paid plan attached and is listed for open-source TypeScript framework (Apache 2.0) for agents, workflows and RAG. Both sit in Agent Frameworks (Developers).
Neither — DSPy and Mastra are both free, so the choice comes down to capability rather than cost. Both entries list what they uniquely do above.
Choose DSPy if you need open-source (MIT) framework from Stanford NLP, 37k+ GitHub stars; choose Mastra if you need open-source TypeScript framework (Apache 2.0) for agents, workflows and RAG. Flocci AI Tools does not rank one above the other — it shows both feature sets side by side and lets the requirement decide.
| DSPy | Mastra | |
|---|---|---|
| Pricing tier | Free | Free |
| Free to start | Yes | Yes |
| Category | AI Agents & Automation | AI Agents & Automation |
| Type | Agent Frameworks (Developers) | Agent Frameworks (Developers) |
| Listed capabilities |
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| Tags | dspy stanford, prompt optimization framework, program not prompt, open source llm framework, structured signatures, python | typescript agent framework, mastra ai, open source agents, workflow engine, javascript agents, vercel ai sdk alternative |
| Website | dspy.ai | mastra.ai |
| Full page | DSPy details → | Mastra details → |
| Alternatives | DSPy alternatives → | Mastra alternatives → |