Gray vs Hermes Agent: which is better for you?

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Short answer

Choose Gray if you want the simplest always-on agent with the fewest moving parts. Choose Hermes Agent if you want a feature-rich, self-improving agent with persistent memory, self-created skills and many messaging integrations.

GrayHermes Agent
MakerOpen-source project (vstaln/gray)Nous Research
What it isMinimal, always-on AI harness: one Rust binary, open source (MIT)Open-source (MIT), self-hosted, self-improving agent; first tagged release March 2026
Memory / skillsCurated cross-session memory in plain Markdown; Markdown skills the agent discovers and runs on demandAgent-curated persistent memory; creates skills on its own after complex tasks and refines them during use
SchedulingCron jobs, run by the gateway daemonBuilt-in cron scheduler
ChannelsTerminal, headless print mode, and Discord through the official pluginTelegram, Discord, Slack, WhatsApp, Signal, Email, Microsoft Teams, Matrix and more, plus a CLI
ModelsAny OpenAI-compatible provider; 10 built in, plus local models through OllamaNous Portal, OpenRouter, OpenAI, Anthropic, Google Gemini and dozens more, plus any OpenAI-compatible endpoint
SetupOne install command on macOS, Linux or Windows 11Install script (Linux, macOS, WSL2, Windows), desktop app or Docker; community-made Railway templates
Minimum box[x]Can run on a $5 VPS, per the project README
Idle resource use[x] MB RAM, [x]% CPU (benchmark)[x] MB RAM, [x]% CPU

Is Gray simpler than Hermes Agent?

Yes, by design. Gray ships one binary and one default tool (bash), and adds everything else through plugins or skills you choose; Hermes Agent ships more built in, including many messaging platforms and dozens of model providers. A basic always-on agent takes [x] lines of config in Gray vs [x] in Hermes Agent.

Does Gray have memory and skills like Hermes?

Yes, in a simpler form. Gray's memory is a short list of named one-line entries in Markdown that you and the agent manage with gray memory, and skills are Markdown procedures the agent discovers and runs on demand. Hermes Agent goes further: it creates skills on its own after complex tasks and refines them as it uses them.

When should you choose Hermes Agent instead?

If you want an agent that learns and builds its own skills over time, or you need one of its many messaging integrations, and you're happy to run and secure a bigger system, Hermes Agent is a strong choice.

Sources

Competitor details are taken from the sources above as of the date at the top of this page. Products change quickly — if something here is out of date, open an issue on GitHub.