Is Letta open source?

Its GitHub repository is Apache 2.0. Omnia is proprietary and free to run; PromptKit and PromptArena underneath are Apache 2.0.

omnia vs letta

Letta’s agents manage their own memory. Omnia’s memory follows your privacy rules.

In Omnia, redaction, consent and erasure are set by the platform, and the agent can’t edit them. In Letta, from the MemGPT team, the agent decides what goes into its own memory.

An agent has talked with a customer for six weeks. The customer asks you to forget them.

on omnia

Their card and phone numbers were redacted before anything reached long-term memory. Withdrawing consent covers what was stored over those six weeks, and the erasure runs as a data subject request with an audit trail. docs

on letta

Background dreaming reviews recent conversations and rewrites memory, and its review step doesn’t ask for approval. Consent, PII redaction and erasure lifecycles aren’t documented. their docs

Memory with rules the agent can’t edit

Redaction and consent are set in the platform. Newer facts win by precedence and supersession, and consolidation runs on a schedule you set. docs enterprise

Letta: Agent-edited memory; in the legacy blocks, the last write wins. source

Tested before it learns from customers

Before each release, simulated users talk to the agent through its real tools. A version that fails doesn’t go out. docs

Letta: Agent testing and versioned rollout aren’t documented. source

Runs on your Kubernetes

Omnia installs with Helm into your cluster, with workspaces isolating each team. docs

Letta: Self-hosting uses a Dockerfile with Compose, Railway or Fly.io; Kubernetes isn’t documented. source

At a glance

Topic	Omnia	Letta, per its docs
Stateful agent runtime	yes Yes. docs	documented Yes. source
Redaction before storage	yes Yes. docs enterprise	not documented Not documented. source
Consent and erasure	yes Consent revocation and a DSAR lifecycle. docs enterprise	partly Per-item deletes. source
Simulated users before release	yes Yes. docs	not documented Not documented. source
Stepped rollout, auto rollback	yes Yes. docs	not documented Not documented. source
Kubernetes	yes Helm. docs	not documented Not documented. source

Common questions

Is Letta open source?: Its GitHub repository is Apache 2.0. Omnia is proprietary and free to run; PromptKit and PromptArena underneath are Apache 2.0.

Put your own agent through the gate.

Install Omnia in your cluster and run it free while you build.

Letta claims are from Letta’s published documentation, checked 22 October 2026. Spot something out of date? Tell us.

Install it in your cluster Or walk through it with us →