Top Open Source Projects Built With Mastra in 2026
A curated collection of the 8 best free and open-source projects built using Mastra. Discover popular repositories, architecture patterns, and trending software in 2026.
Autumn
Drop-in billing for AI startups
Stars2,651Last commit10d agoLicenseApache-2.0Postiz
All-in-one social media scheduling tool
Stars35,180Last commit10d agoLicenseAGPL-3.0
Langfuse
Open source AI agent observability platform
Stars33,799Last commit10d agoLicenseOpen SourceCopilotKit
Enterprise-ready frontend stack for AI agents
Stars37,068Last commit10d agoLicenseMITBlinko
Open-source AI-powered note-taking app
Stars10,958Last commit10d agoLicenseGPL-3.0
Arize Phoenix
Open-source AI agent development platform
Stars11,212Last commit10d agoLicenseOpen Source
Agenta
Open-source workspace for building AI agents
Stars4,557Last commit11d agoLicenseOpen Source
Arize
AI agent observability and evaluation platform
Stars11,261Last commit7d agoLicenseOpen Source
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Showing 8 of 8 open-source tools