synapse-ai

Synapse is an open-source platform for building AI agents that can use real tools like browsing, databases, and code execution. It features a ReAct reasoning engine, multiple built-in tool servers, and supports orchestrating agents as DAGs with human checkpoints. It runs locally-first with support for various LLM providers.

synapse-ai sits in the Workflow Automation category, so it is usually better judged by workflow fit, deployment style, and team needs than by isolated features alone. Based on the available metadata, it leans most clearly toward ReAct reasoning engine with multiple turns. A representative use case is Research-to-report orchestration. The listed license is AGPL-3.0. GitHub stars are currently 330. Relevant tags include custom-agents, custom-tools.