Mastra is Enabling Every Developer to Build Agents Seamlessly

Mastra, a Typescript AI agent framework & platform, led by Sam Bhagwat, Shane Thomas, Abhi Aiyer, and the team, has raised a $22M Series A led by Spark Capital, bringing total capital raised to $35M.

Great frameworks are defined by attention to detail, spanning primitives, APIs, documentation, integrations, and onboarding. Strong foundations enable systems that are powerful, extensible, and intuitively structured.

Effective frameworks provide the right tools with clear extension points, progressive complexity, and seamless interoperability. When executed well, they feel effortless, making new domains more accessible and helping developers stay aligned with evolving technology.

At their core, they reflect a deep focus on craft and a strong affinity for building systems that developers genuinely enjoy using.

Ongoing engagement with developers shows rapid adoption of AI tooling, with many building agents and applications using Mastra.

Teams are embedding agents into products, deploying enterprise-scale systems, and automating workflows across functions, signaling the rise of AI-native development across organisations.

As models improve, orchestration layers are becoming more complex rather than less. Increasing capability has driven the need for more robust harnesses to manage agents effectively.

Mastra reflects this shift through agent primitives such as parallel tool calls, subagents, sandboxes, filesystems, and skills, alongside developer tooling like evals, logs, traces, datasets, an agent editor, and RBAC-enabled authentication.

Mastra is evolving beyond a framework into a full platform for running agents at scale.

Mastra Studio provides cloud and self-hosted tools for evals, logs, traces, datasets, and annotations. Mastra Server enables deployment of agents and workflows, while Memory Gateway delivers advanced agent memory across Mastra and other frameworks.

Agent development is entering a phase of rapid, compounding growth, reminiscent of early internet adoption, where the number of builders is scaling exponentially.

What began with a small group has expanded to dozens of developers per prior cohort, with projections pointing to hundreds in the near future. As AI lowers the barrier to entry, software creation is becoming increasingly accessible.

Mastra’s mission is to enable this shift by putting powerful agent-building tools in the hands of every developer.