One AI app is enough.
Stop reading. Add a memory layer when a second tool arrives, not before.
Four ways to give
your AI a memory.
Plenty of people need none of this. If you live in one AI app and it holds the context that matters, stop reading; that is a fine outcome. This page is for people whose work crosses tools: a decision made in ChatGPT on Monday that Cursor needs on Thursday, a note sitting in Obsidian that Claude should know about. Once the thinking is spread around, the question is where the shared memory lives, and who can read it.
Is it for you?
Your work crosses tools.
This is what Second Brain is for: one brain, reached from every client, free at personal scale.
You are building a product.
Memory as a feature is Mem0’s job: SDKs, a managed platform, SLAs.
You want a place for your own context.
One address for every tool, inside your own account. Needs only one machine? Agentmemory is the local-first answer.
Pick a comparison
How they compare
| Criterion | Second Brain | Mem0 | Unabyss | Agent-Memory |
|---|---|---|---|---|
| Where the memory lives | Your Cloudflare account. | Mem0’s cloud, or your own infrastructure with the OSS edition. | Unabyss’s cloud; EU hosting for EU users. | Your machine, SQLite and JSON on disk. |
| Who can read it | You, over OAuth. | Your account’s API keys; per-user keys on the self-hosted server. | The vendor operates the storage; scoped OAuth per source. | Whoever can reach the machine’s files. |
| Tools and sources | Any MCP client, plus Obsidian, Notion, calendar, email, iOS. | Hosted MCP server for Claude, Cursor, Codex, VS Code and more. | MCP-native, official Claude connector; imports Slack, Gmail, Notion, LinkedIn and 20+ more. | Native plugins for Claude Code, Codex CLI, Cursor, OpenClaw, Hermes and pi; MCP or REST for the rest. |
| Coherence over months | Contradiction settling, smart merge, duplicate blocking. | Extraction, graph entity linking, Dream consolidation (Pro and up). | Auto-extraction and updates; dedupe not published. | Session-stop consolidation with an LLM key. |
| Teams | Personal and shared layers, private by default, no extra charge. | Unlimited end users; no shared layer advertised. | Team plan, $39 per seat a month billed annually, minimum three. | Shared and private team namespaces with share and feed tools; mesh sync between nodes. |
| Cost | Free at personal scale; MIT. | Free tier to $249 a month; Enterprise custom. | $13 to $79 a month billed annually, 7-day trial, no free tier. | Free, Apache-2.0; vendor estimates about $10 a year with an LLM key. |
| Setup | Desktop app, about two minutes, no terminal. | One npx command (cloud) or Docker Compose (OSS). | Vendor states under 90 seconds. | One npx command; native Windows needs WSL2 or a manual engine install. |
| Export | JSON and Markdown, with restore. | Dashboard and MCP delete tools; formal export unverified. | Context files, pasteable into any tool. | Obsidian mirror, REST export, session replay. |
| License | MIT. | Apache-2.0. | No public license found. | Apache-2.0. |
Competitor facts checked 6 September 2026: Mem0 at mem0.ai, docs.mem0.ai and github.com/mem0ai/mem0; Unabyss at unabyss.com; Agent-Memory at agent-memory.dev and github.com/rohitg00/agentmemory.
Choose for the year, not the week.
A memory only counts if it is still worth something twelve months on. Second Brain is free, MIT-licensed forever, and in your account.