Mastra

Mastra Factory is a comprehensive open-source development platform for building AI agents and workflows in TypeScript, developed by Mastra, a US-based company. It emerged as a specialized tool for developers who want to move from prototypes to production without rebuilding infrastructure. The architecture relies on an open-source framework that can be self-hosted, paired with a managed cloud layer (Mastra Platform) providing observability, event management, and data retention.

Architecture and Core Components

The platform consists of four technical pillars: First, the Agent Framework supporting tool calling, long-term memory, and conversation context. Second, the Workflow Engine enabling complex flows with branching, chaining, and human-in-the-loop steps. Third, full RAG support via document chunking, embeddings, and vector stores. Fourth, the Evaluations & Observability layer that tracks LLM outputs and measures performance and quality.

Performance and Integration Features

The platform integrates with popular model providers like OpenAI, Anthropic, and Google, giving developers flexibility in choosing the right engine for each task. It also offers a local dev playground for testing agents before deployment. Operationally, the platform uses observability events and CPU time as billing metrics instead of request counts, a flexible pricing model suited to variable-load applications.

Primary Use Cases

Mastra Factory targets developers building production AI applications such as advanced chatbots, coding assistants, workflow automation systems, and intelligent knowledge bases. With TypeScript support, it integrates seamlessly with modern web projects and allows deploying agents as scalable API services.