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 an AI agent tool that facilitates interaction with various LLM providers and allows for extensive configuration through a CLI.
Markdown twin · letta alternatives · hermes-agent alternatives
GraphCanon updated Sep 20, 2026
18views this month
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Trust & integrity
| Signal | letta | hermes-agent |
|---|---|---|
| Maintenance | Very active (0d since push) As of Aug 17, 2026 · github_public_v1 | Very active (0d since push) As of Sep 18, 2026 · github_public_v1 |
| Provenance | Not a fork · Organization account As of Aug 17, 2026 · github_public_v1 | Not a fork · Organization account As of Sep 18, 2026 · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of Jul 11, 2026 · osv@v1 | No lockfile (source not queried) As of Sep 18, 2026 · 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
- 247k
Forks
- letta
- 2.6k
- hermes-agent
- 52k
Open issues
- letta
- 41
- hermes-agent
- 44k
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 an AI agent tool that facilitates interaction with various LLM providers and allows for extensive configuration through a CLI.
Persona
- letta
- -
- hermes-agent
- -
Runtime
- letta
- -
- hermes-agent
- -
License
- letta
- letta operates under the Apache-2.0 license.
- hermes-agent
- MIT License
Last pushed
- letta
- Aug 16, 2026
- hermes-agent
- Sep 18, 2026
Categories
- letta
- AI Agents
- hermes-agent
- AI Agents
Trust and health
Open issues (now)
- letta
- 41
- hermes-agent
- 44k
Stars delta
- letta
- +443 (30d)
- hermes-agent
- +16k (30d)
Open issues delta
- letta
- -8 (30d)
- hermes-agent
- +11909 (30d)
Full report
- letta
- Trust 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: The tool is free to use under the MIT license, but additional services or features may incur costs..
- Requirements: Min 2 GB RAM; The tool requires the GitHub CLI to be installed, which can be installed via winget..
- 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, ai-agent, ai-agents, anthropic.
- hermes-agent ships Docker support for self-hosted deployment.
- When you need a tool that can be configured to work with multiple LLM providers, including Anthropic, OpenAI, and others.
When NOT to use hermes-agent
- If you require a graphical user interface for managing your AI agent configurations, as Hermes-agent primarily operates through a CLI.
- When you are working exclusively with a single LLM provider and do not need the flexibility to switch between different providers.
- If you are not interested in integrating your AI agent with external messaging platforms, as Hermes-agent includes a gateway feature that might be unnecessary for your 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 Sep 20, 2026
- GitHub forks (letta-ai/letta) · observed Sep 20, 2026
- Last push (letta-ai/letta) · observed Aug 16, 2026
- License file (Apache-2.0) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (NousResearch/hermes-agent) · observed Sep 20, 2026
- GitHub forks (NousResearch/hermes-agent) · observed Sep 20, 2026
- Last push (NousResearch/hermes-agent) · observed Sep 18, 2026
- License file (MIT) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Sep 18, 2026
- Trust scan (lockfile / OSV) · observed Sep 18, 2026
GitHub stars on cards: letta 24k · hermes-agent 247k (synced Sep 20, 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: The tool is free to use under the MIT license, but additional services or features may incur costs.; Requirements: Min 2 GB RAM; The tool requires the GitHub CLI to be installed, which can be installed via winget.; 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, ai-agent, ai-agents, anthropic; hermes-agent ships Docker support for self-hosted deployment; When you need a tool that can be configured to work with multiple LLM providers, including Anthropic, OpenAI, and others.
- 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?
- If you require a graphical user interface for managing your AI agent configurations, as Hermes-agent primarily operates through a CLI. When you are working exclusively with a single LLM provider and do not need the flexibility to switch between different providers. If you are not interested in integrating your AI agent with external messaging platforms, as Hermes-agent includes a gateway feature that might be unnecessary for your needs.
- Is letta or hermes-agent more popular on GitHub?
- hermes-agent has more GitHub stars (246,684 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.