Best AI memory tools for agents
Agents that remember beat agents that don't. These are the memory backends we recommend for production agent workflows.
Quick answer
- Best overall:
- Mem0
- Best vector DB:
- Pinecone
- Best self-host:
- Qdrant
- Best budget option:
- Supabase pgvector
What to avoid: Rolling your own memory in raw Postgres without pgvector or a vector store — retrieval falls off a cliff.
Last verified: July 2026
Comparison matrix
| Tool | Best for | API | Free | Pricing | Strength | Limitation | Score | Verified | Try |
|---|---|---|---|---|---|---|---|---|---|
| Mem0 | Agent episodic memory | From $19/mo | Purpose-built for agent memory | Newer than raw vector DBs | 9.0 | 2026-07 | |||
| Pinecone | Managed vector DB | Starter free | Serverless, fast retrieval | Costs jump at scale | 9.0 | 2026-07 | |||
| Qdrant | Self-hosted vector DB | OSS + cloud | Great perf, self-host option | You own ops | 8.8 | 2026-07 | |||
| Supabase pgvector | Cheapest useful memory | Free tier | Postgres you already have | Lower recall vs dedicated vector DBs | 8.4 | 2026-07 |
Mem0
Score 9.0Agent episodic memory
- API
- Yes
- Free tier
- Yes
- Pricing
- From $19/mo
- Strength
- Purpose-built for agent memory
- Limitation
- Newer than raw vector DBs
- Verified
- 2026-07
Pinecone
Score 9.0Managed vector DB
- API
- Yes
- Free tier
- Yes
- Pricing
- Starter free
- Strength
- Serverless, fast retrieval
- Limitation
- Costs jump at scale
- Verified
- 2026-07
Qdrant
Score 8.8Self-hosted vector DB
- API
- Yes
- Free tier
- Yes
- Pricing
- OSS + cloud
- Strength
- Great perf, self-host option
- Limitation
- You own ops
- Verified
- 2026-07
Supabase pgvector
Score 8.4Cheapest useful memory
- API
- Yes
- Free tier
- Yes
- Pricing
- Free tier
- Strength
- Postgres you already have
- Limitation
- Lower recall vs dedicated vector DBs
- Verified
- 2026-07
When to use these
Use for chat agents with long memory, RAG over user data, personalization and session recall.
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FAQ
Do I need a vector DB or just Postgres?
For simple RAG, pgvector is fine. For agent episodic memory across sessions, prefer Mem0, Pinecone or Qdrant.