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Libra vs Letta: Which AI Memory Platform Is Better for Production Agents?
Overview
Letta (formerly MemGPT) pioneered agent memory paging. Libra takes a retrieval-first approach optimized for token cost and production reliability.
Benchmarks
Libra publishes only numbers it can reproduce. Figures below are placeholders.
| Benchmark | Libra | Letta |
|---|---|---|
| LongMemEval | <score> | <score> |
| LoCoMo | <score> | <score> |
| BEAM | <score> | <score> |
Key Advantages of Libra
Token efficiency and selective retrieval keep the right context in the window while spending fewer tokens — so agents stay accurate and affordable at scale.
When to Choose Libra Over Letta
Choose Libra if…
- You want a managed, drop-in memory API
- Token efficiency at scale is critical
- You need enterprise deployment options
Choose Letta if…
- You want full control over the agent runtime
- You're building on Letta's open-source stack
Pricing
Both have free options. Libra's paid tiers scale with add and retrieval request volume.
Quick Integration
SDKs for Python and JavaScript, plus REST APIs — drop Libra into your stack in minutes.
Enterprise Features
SOC 2 / HIPAA compliance, with Kubernetes and private-cloud deployment options.
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