Open sourcePython · ≈1.7k stars · MIT
LangMem
Long-term memory for agents from LangChain
LangMem helps agents learn and adapt from their interactions over time. It extracts important information from conversations, refines agent prompts and keeps long-term memory. It offers functional primitives that work with any storage system and integrates natively with LangGraph's storage layer.
The team behind it
San Francisco, CA · Est. 2022
The de-facto standard toolkit for building LLM applications and agents.
LangChain makes the LangChain framework and LangGraph, the low-level orchestration standard for stateful, controllable agents, plus the LangSmith platform for tracing, evaluating and monitoring them in production.
~$75M raised
Neighbours on the workbench
JavaScript · ≈292k stars · MIT
affaan-m/ECC
Agent harness performance optimization system: skills, instincts, memory and security for coding agents.
Maintained by Affaan Mustafa
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NousResearch/hermes-agent
The agent that grows with you.
Maintained by Nous Research
Python · ≈138k stars · Apache-2.0
Graphify-Labs/graphify
A /graphify skill that turns a codebase, docs and schemas into a queryable knowledge graph.
Maintained by Graphify-Labs
Connections
Relations from the Harness Hub knowledge graph, as charted in the State of Harness reports.
Maintained by · 1
- LangChainStartup
Sources
Verified Oct 29, 2026
