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High Tech Series A Founded 2024

Mastra

Mastra develops a framework for building AI applications and agents, providing tools for agents, workflows, RAG, memory, and model control policies. The framework allows users to iterate and visualize agents and workflows, with an observability platform to productionize and test agent performance. Founded in 2024 in San Francisco, United States, the company has raised $35.5M in Series A funding from investors…

📍 San Francisco, United States · AI Infrastructure,

Funding snapshot

Last roundSeries A
Amount$22M
Date9 April 2026
Total raised$36M

About

Mastra develops a framework for building AI applications and agents, providing tools for agents, workflows, RAG, memory, and model control policies. The framework allows users to iterate and visualize agents and workflows, with an observability platform to productionize and test agent performance. Founded in 2024 in San Francisco, United States, the company has raised $35.5M in Series A funding from investors including Y Combinator, Gradient Ventures, and Spark Capital. Developer of framework for building artificial intelligence applications and agents. It provides tools for agents, workflows, RAG, memory, and model control policies. It offers an observability platform to productionize and test agent performance. The framework facilitates deployment and scaling, exposing agents as APIs or bundling them with applications.

Business model

AI Infrastructure > Open Source > DL Frameworks and Libraries

Institutional investors

Y Combinator Gradient Ventures base case SV Angel Spark Capital Eight Capital Management Balaji Srinivasan Amjad Masad Darian Shirazi

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