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
Trust & integrity
| Signal | letta | hermes-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
- letta
- Trust report
- hermes-agent
- Trust report
Typed relationship
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 (letta-ai/letta) · observed Aug 17, 2026
- GitHub forks (letta-ai/letta) · observed Aug 17, 2026
- Last push (letta-ai/letta) · observed Aug 16, 2026
- License file (Apache-2.0) · observed Aug 17, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (NousResearch/hermes-agent) · observed Aug 16, 2026
- GitHub forks (NousResearch/hermes-agent) · observed Aug 16, 2026
- Last push (NousResearch/hermes-agent) · observed Aug 15, 2026
- License file (MIT) · observed Aug 16, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
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.