Memory for agents for AI agents
4 APIs compared on price, free tier, MCP support and real usage. Prices from the vendors' pricing pages, checked Oct 9, 2026.
Free to start
4 of 4
Mem0, Zep, Letta
Official MCP server
4 of 4
plug straight into Claude Code, Cursor and others
| API | Free | Price | SDK downloads / wk | GitHub stars | MCP |
|---|---|---|---|---|---|
| Mem0 Memory layer that extracts, stores and retrieves user and agent memories for LLM apps. |
Hobby: 10,000 add requests and 1,000... | Free plan · paid from $19/mo | 643K | 66.9K | MCP |
| Zep Context-graph memory for agents that ingests chats and data and returns relevant facts. |
10,000 credits/month (no rollover) | Free plan · paid from $125/mo | 211K | 4,954 | MCP |
| Letta Stateful agent platform (formerly MemGPT) with persistent, self-editing memory. |
Free plan $0/month, limited agents (3... | Free plan · paid from $20/mo | 161K | 25.1K | MCP |
| Supermemory Memory and retrieval API that builds per-user memory graphs from text, files and connectors. |
$5 of credits/month | $0.005 / 1k requests · free tier | 150K | 31.2K | MCP |
Other categories
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