Production-Ready Open Source Agent Stack
A complete developer infrastructure for building AI agents that can reason, remember, and ship frontend code. Mastra handles agent orchestration and multi-step workflows, Cognee gives those agents persistent structured memory that improves over time, and Stagewise closes the loop by letting you visually iterate on the frontend your agents are building. The go-to stack for TypeScript developers and technical founders who want production-grade agents without paying for managed platforms or proprietary memory services.
The workflow — 3 agents in sequence
Agent orchestration and workflow engine
Open-source TypeScript AI agent framework by the Gatsby team. v1.0 January 2026. YC W25, $13M funded, 24.6k+ GitHub stars. Used by Replit, SoftBank, Factorial. Framework free; Cloud from $250/mo.
Mastra defines the agent loop, tools, and multi-step workflow logic — then passes execution context and results into Cognee for persistent storage
Persistent memory and knowledge graph
Open-source AI memory engine for agents using hybrid graph and vector architecture. ECL pipeline. $7.5M seed, 17.6k+ GitHub stars. Free self-hosted; Developer $35/mo, Team $200/mo.
Cognee stores what the agent learns across sessions as a structured knowledge graph — feeding relevant context back into Mastra on each run so the agent gets smarter over time
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