The deciding difference is operational: LangMem can run on infrastructure you control, Supermemory cannot. If that constraint is real for you, it settles the choice before anything else is considered.
Memory graph plus automatic user profiles, with connectors that sync from Drive, Gmail, Notion and GitHub.
Closest thing here to memory and RAG in one product: the graph tracks contradictions and recency, and the connectors mean you are not writing an ingestion pipeline first.
Memory primitives that plug straight into LangGraph checkpoints.
| Supermemory | LangMem | |
|---|---|---|
| Licence | Proprietary | Open source |
| Pricing | freemium | open source |
| Self-hostable | No | Yes |
| Languages | TypeScript, Python | Python |
| Install | — | pip install langmem |
| Keys required | SUPERMEMORY_API_KEY | None |
The deciding difference is operational: LangMem can run on infrastructure you control, Supermemory cannot. If that constraint is real for you, it settles the choice before anything else is considered. Supermemory: Memory graph plus automatic user profiles, with connectors that sync from Drive, Gmail, Notion and GitHub. LangMem: Memory primitives that plug straight into LangGraph checkpoints.
Supermemory is a hosted service only. LangMem can run on your own infrastructure.
Supermemory is proprietary (freemium). LangMem is open source (open source).
Every page here answers to Accept: text/markdown and returns the same content at roughly a tenth the tokens. No separate site, no toggle — same URL.
curl -s -H "Accept: text/markdown" https://newagent.build/compare/supermemory-vs-langmem