Mem0 alternatives — 2026
The best Mem0 alternatives in 2026
Mem0's $19 → $249 pricing cliff sends developers looking for alternatives. Here's what actually works.
Threadline
Persistent memory layer for AI agents. inject() before your LLM call, update() after. Designed so retrieval is a direct database lookup — not vector search.
- Retrieval latency
- ~38ms*
- Free tier
- 10,000 memories/month
- Builder
- $49/mo for 100K memories
- Scale
- $299/mo for 1M memories
- Governance
- OAuth-style grants, hard delete, full audit trail
- MCP support
- Native
- Setup
- npm install — 2 lines of code
* inject() is a direct lookup, not vector search. Intelligence happens at update() time.
Other alternatives
Supermemory
Solid semantic search with a clean API. Performs vector search at retrieval time, so latency lands around <300ms — fine for many apps, but ~8x slower than a direct lookup. No native MCP, and users don't own their context.
Zep
Powerful and well-engineered, especially for teams comfortable self-hosting or signing an enterprise contract. No free tier. P95 retrieval around 300ms. No native MCP.
Letta
Interesting agent-state framework with persistent memory primitives. More of a stateful agents toolkit than a drop-in memory layer. No free tier and no native MCP.
Try Threadline free — no credit card
10,000 memories/month. Live in 2 lines of code.
10K memories/month free