Building AI apps usually means wrestling with different SDKs, managing conversation state, and figuring out how to pause workflows for human approval. The team behind Gatsby just dropped Mastra to solve exactly these headaches with a TypeScript-native approach that actually makes sense.
What sets Mastra apart is its completeness: unified API for 40+ LLM providers (OpenAI, Anthropic, Gemini), graph-based workflows with intuitive .then() and .branch() syntax, and proper human-in-the-loop support that can suspend execution indefinitely and resume later. The agent system handles tool selection and iterative reasoning, while the context management includes conversation history, RAG retrieval, and semantic memory. It’s designed around real AI patterns, not just another wrapper around the OpenAI API.
At 20K+ stars and backed by Y Combinator W25, this is gaining serious momentum. Whether you’re prototyping chatbots or building production AI workflows, Mastra integrates cleanly with Next.js/React or runs standalone. The TypeScript-first design means you get proper types throughout the AI pipeline—something most frameworks still struggle with.
⭐ Stars: 20746
💻 Language: TypeScript
🔗 Repository: mastra-ai/mastra