Honcho vs Letta
A side-by-side comparison of Honcho and Letta, two Memory tools, drawn from Ignaite's continuously-verified listings.
Compared from listings verified as of
At a glance
| Attribute | Honcho | Letta |
|---|---|---|
| Category | Memory | Memory |
| Pricing | FREEMIUM | FREEMIUM |
| License | Open core | Open core |
| Deployment | Hybrid | Hybrid |
| Platforms (differs) | API, CLI | API, CLI, macOS, Windows, Linux |
| Model support (differs) | Model-agnostic | BYO key / model |
| Vendor (differs) | Plastic Labs | Letta |
| Capabilities (differs) |
|
|
The honest brief
Honcho
Peer-centric memory models what any party knows about another, extracting conclusions rather than raw chunks.
- Open-source memory infrastructure
- Peer model for human/agent/idea memory
- Reasoning-first, derives durable facts
- Strong long-memory benchmark scores
- Managed API or self-hosted FastAPI
- Young, evolving ecosystem
- Self-host stack (Postgres/Redis) to run
- Background inference adds LLM cost
- Smaller community than incumbents
Letta
The productized MemGPT successor — agents edit their own memory blocks (memory-as-OS) to manage a finite context window.
- Self-editing agent memory
- Open source, model-agnostic
- REST APIs + multi-language SDKs
- Reference architecture for memory
- Developer-focused, not no-code
- Memory model has a learning curve
- Younger, evolving framework
When to pick which
Across the signals we compare, Honcho and Letta differ on platforms:
- Platforms
- API, CLI · API, CLI, macOS, Windows, Linux
Their capability lists differ in recorded depth — compare the full lists above before deciding.