LettavsOmnara
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
Letta
Letta · Agent harness
OSS
Panel
6.52 spec wins
- Reliability
- 6.0
- Usefulness
- 6.7
- Cost
- 7.0
- Longevity
- 6.3
“It used to be called MemGPT, and it remembers that.”
Omnara
Omnara · Agent harness
OSSMCP
Panel
6.85 spec wins
- Reliability
- 6.5
- Usefulness
- 6.7
- Cost
- 7.7
- Longevity
- 6.2
“Your agent is a YAML file with a machine, a model and a Slack account, which is more onboarding than most contractors get.”
Spec by spec
| Spec | Letta | Omnara |
|---|---|---|
| Architecture | ||
| Category | Agent harness | Agent harness |
| Runs | local, cloud | cloud, sandbox, local |
| Platforms | macos, linux, windows, web | linux, web |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | No | Yes |
| MCP server | No | No |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | Yes | No |
| Git operations | No | No |
| Browser control | No | No |
| Sandboxed execution | No | YesMachines are sandboxes supplied by Blaxel or Daytona, or your own. |
| Multi-agent orchestration | No | Yes |
| Headless / CI mode | No | Yes |
| Models | ||
| Backbone | any | OpenAI, Anthropic, OpenRouter, LiteLLM, Ollama |
| Bring your own model | Yes | Yes |
| Local models | No | YesAny compatible endpoint is accepted, and Ollama is named explicitly. |
| Cost | ||
| Pricing model | mixed | mixed |
| Starts at | $20/mo | n/a |
| Free tier | Yes | Yes |
| Bring your own key | Yes | Yes |
| Openness | ||
| Open source | Yes | Yes |
| License | Apache-2.0 | Apache-2.0 |
| GitHub stars | 25,000 | 2,879 |
Which one would each critic pick
| Critic | Letta | Omnara | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 6.5 | 7.0 | Omnara — Pick Omnara when you want an agent defined in a file your team can review; pick Letta if you care more about what the agent remembers than about how it is deployed. |
| El Crítico | 6.0 | 6.0 | no preference |
| El Profesor | 6.8 | 6.8 | no preference |
| La Inversora | 6.5 | 6.3 | Letta — The free plan caps you at three stateful agents, which is a well-drawn funnel: the limit bites exactly when the product has started to be worth paying for. |
| La Jefa | 6.0 | 6.8 | Omnara — Sixty engineers can share one self-hosted deployment at no licence cost, runs happen without a person present, and a Slack connector puts the output where work already is. |
| El Hacker | 7.3 | 7.8 | Omnara — Apache-2.0, `npx omnara login` and you are running, MCP servers are a field in the profile, and Ollama is a first-class provider. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.