I replaced Claude with a local 9B model for a week, and it handled 95% of my work

Cursor and Claude Code both indicate they are "connected to my memory server" yet still share no information. This occurs because the connection is merely a technical link, while actual sharing depends on the account setup. All clients pointing to the same backend are considered connected, but without the same account, no information is exchanged.

For Mnemoverse, the setup step is a single API key. Every client connected to this key shares memory by default. Changing the key creates a separate account, ending sharing. The browser sign-in in VS Code bypasses this key and automatically connects to the same account system.

Cognee offers two modes: Standalone, where each instance has its own database, and API, where instances connect to a shared backend. The former prevents sharing, while the latter allows it. However, Cognee's API Mode shares a single token for all writes, effectively creating one Cognee user account.

Mem0 requires a unique identifier for each user. Two tools using the default identifier will not share memory, as they end up in separate namespaces. Setting a custom identifier enables shared memory across tools.

Supermemory, designed for shared memory, requires each client to select which spaces (identifiers) it can access. If two clients are authorized to different spaces, or have different active spaces, they will not share memory. Supermemory relies on this setup choice to determine sharing.