Home/Compare/letta vs hermes-agent

Comparison

letta vs hermes-agent

Verdict

Pick letta if letta is a Python-based platform designed to foster the development of stateful AI agents with capabilities for advanced memory techniques that support continuous learning and self-improvement. The Apache-2.0 license it鳧; pick hermes-agent if hermes-agent is a Python-based AI project aimed at developing an adaptable AI agent.

Markdown twin · letta alternatives · hermes-agent alternatives

GraphCanon updated 1d

letta logo

letta

letta-ai/letta

24kpushed Aug 16, 2026
vs
hermes-agent logo

hermes-agent

NousResearch/hermes-agent

231kpushed Aug 15, 2026

Trust & integrity

Signallettahermes-agent
Maintenance
Very active (0d since push)
As of 1d · github_public_v1
Very active (0d since push)
As of 2d · github_public_v1
Provenance
Not a fork · Organization account
As of 1d · github_public_v1
Not a fork · Organization account
As of 2d · github_public_v1
OSV dependency advisories
No lockfile (source not queried)
As of 1mo · osv@v1
No lockfile (source not queried)
As of 1mo · osv@v1
deps.dev advisories
Not queried
deps.dev@v1
Not queried
deps.dev@v1
OpenSSF Scorecard
Not queried
openssf-scorecard@v1
Not queried
openssf-scorecard@v1

Tagline

letta
Platform for stateful agents: AI with advanced memory that can learn and self-improve over time.
hermes-agent
The agent that grows with you

Stars

letta
24k
hermes-agent
231k

Forks

letta
2.6k
hermes-agent
46k

Open issues

letta
41
hermes-agent
32k

Language

letta
-
hermes-agent
Python

Adopt for

letta
letta is a Python-based platform designed to foster the development of stateful AI agents with capabilities for advanced memory techniques that support continuous learning and self-improvement. The Apache-2.0 license it鳧
hermes-agent
Hermes-agent is a Python-based AI project aimed at developing an adaptable AI agent.

Persona

letta
-
hermes-agent
-

Runtime

letta
-
hermes-agent
-

License

letta
letta operates under the Apache-2.0 license.
hermes-agent
MIT License; this allows for extensive freedoms including use in both personal and commercial projects with minimal legal restrictions.

Last pushed

letta
Aug 16, 2026
hermes-agent
Aug 15, 2026

Categories

letta
AI Agents
hermes-agent
AI Agents

Trust and health

Open issues (now)

letta
41
hermes-agent
32k

Stars delta

letta
+443 (30d)
hermes-agent
+15k (30d)

Open issues delta

letta
-8 (30d)
hermes-agent
+9115 (30d)

Full report

hermes-agent
Trust report

Typed relationship

letta alternative hermes-agentBoth Letta and Hermes Agent are self-improving AI agents with advanced memory, making them alternatives to each other.

Choose letta if…

  • License: letta is Apache-2.0, hermes-agent is MIT.
  • Both Letta and Hermes Agent are self-improving AI agents with advanced memory, making them alternatives to each other.
  • Tags unique to letta: advanced memory, agents development framework, self-improving ai, stateful ai.
  • When you require an AI agent with robust memory features that enable continuous learning and adaptation over time.

When NOT to use letta

  • If you are looking for a simple stateless AI solution without advanced memory capabilities, as letta is geared towards more complex stateful agent development.
  • When your project's requirements involve strict limitations around data retention and privacy where even anonymized interaction logs might be considered sensitive.

Choose hermes-agent if…

  • License: hermes-agent is MIT, letta is Apache-2.0.
  • Pricing: Open-source under the MIT license means it is free to modify, share, and distribute but additional services or premium versions may come at a cost..
  • Requirements: Requires Python environment setup; adaptable AI functionalities might need integration with other specific libraries or APIs depending on the application..
  • Both Letta and Hermes Agent are self-improving AI agents with advanced memory, making them alternatives to each other.
  • Tags unique to hermes-agent: ai-agent, anthropic, chatgpt, claude.
  • hermes-agent ships Docker support for self-hosted deployment.
  • When you are in need of an adaptive AI tool that can evolve with your increasing complexity and changing needs, such as for continuous learning scenarios.

When NOT to use hermes-agent

  • When your project demands a highly specialized and less flexible tool. Hermes-agent is designed for broader flexibility rather than specific tasks.
  • If you are looking for an out-of-the-box, ready solution without the need for customization or growth over time, hermes-agent might require more setup and adjustment to meet your precise needs.

Explore

Sources

Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.

GitHub stars on cards: letta 24k · hermes-agent 231k (synced Aug 17, 2026).

Common questions

What is the difference between letta and hermes-agent?
letta: Platform for stateful agents: AI with advanced memory that can learn and self-improve over time.. hermes-agent: The agent that grows with you. See the comparison table for live GitHub stats and shared categories.
When should I choose letta over hermes-agent?
Choose letta over hermes-agent when License: letta is Apache-2.0, hermes-agent is MIT; Both Letta and Hermes Agent are self-improving AI agents with advanced memory, making them alternatives to each other; Tags unique to letta: advanced memory, agents development framework, self-improving ai, stateful ai; When you require an AI agent with robust memory features that enable continuous learning and adaptation over time.
When should I choose hermes-agent over letta?
Choose hermes-agent over letta when License: hermes-agent is MIT, letta is Apache-2.0; Pricing: Open-source under the MIT license means it is free to modify, share, and distribute but additional services or premium versions may come at a cost.; Requirements: Requires Python environment setup; adaptable AI functionalities might need integration with other specific libraries or APIs depending on the application.; Both Letta and Hermes Agent are self-improving AI agents with advanced memory, making them alternatives to each other; Tags unique to hermes-agent: ai-agent, anthropic, chatgpt, claude; hermes-agent ships Docker support for self-hosted deployment; When you are in need of an adaptive AI tool that can evolve with your increasing complexity and changing needs, such as for continuous learning scenarios.
When should I avoid letta?
If you are looking for a simple stateless AI solution without advanced memory capabilities, as letta is geared towards more complex stateful agent development. When your project's requirements involve strict limitations around data retention and privacy where even anonymized interaction logs might be considered sensitive.
When should I avoid hermes-agent?
When your project demands a highly specialized and less flexible tool. Hermes-agent is designed for broader flexibility rather than specific tasks. If you are looking for an out-of-the-box, ready solution without the need for customization or growth over time, hermes-agent might require more setup and adjustment to meet your precise needs.
Is letta or hermes-agent more popular on GitHub?
hermes-agent has more GitHub stars (231,074 vs 24,274). Stars measure visibility, not whether either tool fits your constraints.
Are letta and hermes-agent open source?
Yes - both are open-source projects on GitHub (letta: Apache-2.0, hermes-agent: MIT).
Where can I find alternatives to letta or hermes-agent?
GraphCanon lists graph-backed alternatives at letta alternatives and hermes-agent alternatives (letta markdown twin, hermes-agent markdown twin), ranked by typed relationship edges rather than popularity votes.
Is there a machine-readable version of this comparison?
Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
Which is better maintained, letta or hermes-agent?
letta: Very active. hermes-agent: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
Where are the full trust reports for letta and hermes-agent?
GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: letta trust report; hermes-agent trust report.

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