MemPalace keeps your conversations word for word. Harbor serves what your team decided.
MemPalace is open-source, local-first memory for AI agents: it keeps your conversations as verbatim text on your machine, finds them with semantic search and keeps facts in a temporal knowledge graph. Its hooks have Claude Code, Codex and Cursor save as they work. Harbor learns from where the team decides, in Slack threads, PR reviews and docs, and serves the rules that apply. MemPalace is free, MIT licensed and runs locally. Harbor has the gate you set, served and cited counts on every rule, and guardrails.
Free for you and one teammate. No card. No end date. Every line about MemPalace is from its own pages, read on 13 November 2026.
Decide what gets in. See what gets used.
Three things Harbor does for the team behind the agents, each beside what MemPalace's own pages say about the same job.
You set the gate
Manual, Hybrid or Auto. Whatever you pick, secrets, install steps and dangerous commands wait for a person.
In MemPalaceThe agent files its own memories when a hook asks it to, and the docs describe no review step, on one machine or on a shared hub. A hub can run read-only, which hides the write tools.
You see what got used
Every rule shows how often it was served and how often an answer cited it.
In MemPalaceThe docs don't describe a record of which memories were recalled. Its audit command scores how well the palace is organized.
You block a risky command
Block rules refuse it before it runs, in Claude Code, Cursor, Codex and Copilot.
In MemPalaceNot part of the product.
Harbor and MemPalace, row by row.
| Harbor | MemPalace | |
|---|---|---|
| What it is | Shared memory for a team's coding agents. It learns what your team decides and corrects, and serves the rules that apply to each session. | Local-first memory for AI agents. It stores your conversation history as verbatim text and retrieves it with semantic search, with a knowledge graph beside it. |
| Where the knowledge comes from | Slack, GitHub, GitLab, Notion, Confluence, Jira, Linear, Google Drive and Granola, plus what agent sessions record. | Your agent conversations, saved verbatim, plus project files and session folders you mine with its CLI. |
| Who decides what gets in | You set the gate. Manual holds everything for a person, Hybrid adds routine rules and holds the important ones, Auto adds everything else. Secrets, install steps and dangerous commands wait in every mode. | The agent files its own memories when a hook asks it to, and the docs describe no review step, on one machine or on a shared hub. A hub can run read-only, which hides the write tools. |
| How it reaches the agent | Hooks add the rules that apply to the session before the agent writes a line. The same rules are on an MCP server, the CLI and /harbor in Slack. | Agents read and write the palace through its MCP tools, a wake-up command loads context into a new session, and a recall skill searches before answering. Its hooks save every 15 messages and before compaction. |
| When a decision changes | When a push deletes the file a rule is about, the rule is retired, or flagged if other repos still use it. A rule saved by an agent replaces one it reverses when its author could have retired the old one, with a Restore. Otherwise, and for anything read from a connected source, the pair waits for a person. | Conversations stay verbatim. Facts in its temporal knowledge graph carry validity windows and can be invalidated when they stop being true. |
| Seeing what was used | Every rule shows how often it was served and how often an answer cited it. | The docs don't describe a record of which memories were recalled. Its audit command scores how well the palace is organized. |
| Stopping a risky command | Block rules refuse a command before it runs, in Claude Code, Cursor, Codex and GitHub Copilot, and hand the agent something to run instead. | Not part of the product. |
| Agents | Claude Code, Cursor, Codex and GitHub Copilot (the CLI and VS Code). | Claude Code, Codex CLI and Cursor through hooks, plus Gemini CLI, Antigravity, local models and any MCP client. |
| Open source and hosting | The CLI, harborloop, is MIT licensed on npm. The service is hosted. | Open source under MIT, and local first: the palace lives in one folder on your machine. A hub can serve a team over a tailnet or an HTTPS proxy. There is no hosted service. |
| Price | Setup is self-serve and takes two minutes, with no call required. Free costs nothing for up to 2 people on one source, Pro is $24 per person a month billed yearly or $30 monthly, and Premium is $36, or $45 monthly. | Free. There is no paid plan. |
| Best for | Engineering teams who want every coding session to start with what the team decided. | Developers who want free, local memory of their own agent conversations, kept word for word. |
MemPalace's side comes from its own pages, read on 13 November 2026: MemPalace on GitHub · mempalaceofficial.com · MemPalace hooks · MemPalace shared brain. Out of date? Tell us.
Pick the one built for your job.
Pick Harbor if
- The knowledge is your team's: decisions made in Slack threads and PR reviews, not one user's preferences.
- You want to choose what waits for a person before it reaches every agent.
- You want to see, rule by rule, which ones agents were served and which ones they used.
- You want block rules that stop a destructive command before it runs.
Pick MemPalace if
- You want every conversation kept word for word on your own machine, with nothing uploaded.
- You want it free and open source under MIT, with no account.
- You run agents beyond Claude Code, Cursor, Codex and Copilot, such as Gemini CLI or a local model.
- You want a temporal knowledge graph of facts beside the transcripts.
Before you choose.
Can I run Harbor and MemPalace together?
Yes, because they keep different things. MemPalace recalls what one engineer and their agents said, on that machine. Harbor serves every agent on the team the rules the team decided.
Can I start with Harbor today?
Yes. Sign up with Google or email, create your workspace and run npx harborloop init, with no card and no call. MemPalace installs today with pip, with no account.
Is Harbor open source?
The CLI, harborloop, is MIT licensed on npm. The service is hosted. MemPalace: Open source under MIT, and local first: the palace lives in one folder on your machine. A hub can serve a team over a tailnet or an HTTPS proxy. There is no hosted service.
Where do the claims about MemPalace come from?
From MemPalace's own public pages, read on 13 November 2026, which are listed under the table. Products move, so if a line is out of date, tell us and we will fix it.
Your team’s rules,
in every agent, checked on every PR.
Nothing to migrate and nothing to write. Every agent starts with what your team settles, and two weeks in you see which rules they cite.
Free for you and one teammate. No card. No end date.