Overview - Mem0 — ContextQMD

Mem0 Open Source is the same memory engine as the Platform, running on your own infrastructure. You own the stack, the data, and every component, and you choose where each one runs.

Run it two ways:

As a library in your app. pip install mem0ai (or npm install mem0ai), call Memory(), and you have memory in a few lines.
As a self-hosted server. A Docker stack with a dashboard, per-user API keys, and a request audit log.

Get started

<CardGroup cols={3}> <Card title="Python Quickstart" icon="python" href="/open-source/python-quickstart"> Install the SDK and verify the add/search loop in a few lines. </Card> <Card title="Node.js Quickstart" icon="node" href="/open-source/node-quickstart"> Install the TypeScript SDK and run the starter script. </Card> <Card title="Self-hosted server" icon="rocket-launch" href="/open-source/setup"> Run `make bootstrap` to launch the server, dashboard, and your first API key. </Card> </CardGroup>

Go further

<CardGroup cols={3}> <Card title="Configure components" icon="sliders" href="/open-source/configuration"> Set your LLM, embedder, vector store, and reranker. </Card> <Card title="Self-hosting features" icon="server" href="/open-source/features/overview"> Async memory, metadata filters, reranker search, multimodal, and more. </Card> <Card title="Build with cookbooks" icon="book-open" href="/cookbooks/overview"> End-to-end examples: companions, agents, and integrations. </Card> </CardGroup> <Tip> Need a managed alternative? Compare hosting models in the <Link href="/platform/platform-vs-oss">Platform vs OSS guide</Link> or switch tabs to the Platform documentation. </Tip>

Default components

Mem0 runs out of the box with the defaults below. Override any of them through configuration.

As a library (you import Mem0 and call Memory()):

Component	Default
LLM	OpenAI `gpt-5-mini` (set `OPENAI_API_KEY`)
Embeddings	OpenAI `text-embedding-3-small`
Vector store	Local Qdrant at `/tmp/qdrant`
History store	SQLite at `~/.mem0/history.db`
Reranker	Disabled until configured

Override any component with Memory.from_config.

As a self-hosted server (the server/ Docker Compose stack):

Component	Default
LLM	OpenAI `gpt-5-mini` (override with `MEM0_DEFAULT_LLM_MODEL`)
Embeddings	OpenAI `text-embedding-3-small` (override with `MEM0_DEFAULT_EMBEDDER_MODEL`)
Vector store	Postgres + pgvector
Bundled providers	`openai`, `anthropic`, `gemini` (switch on the Configuration page)

See Self-Hosted Setup for the full provider list and how to extend it.