Mastra

Mastra@calcsamApr 9, 2026

We’re excited to announce today that @mastra has raised a $22M Series A led by Spark Capital. This brings our total capital raised to $35M: https://t.co/CHKHyf2hn8

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Launched Apr 9, 2026View post

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1

Today we're launching @mastra `Harness` `Harness` gives you a `Session` with plan/build modes. It lets you manage thread lifecycle, spawn or fork subagents, approve tools per-call or session, ask user questions, queue/steer. With skills, sandbox, browser, heartbeat. channels: https://t.co/LgS1UFnEGw

Jun 18, 2026
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