Hermes Agent vs Vellum: A Neutral 2026 Comparison
Vellum ranks itself first among Hermes Agent alternatives. A third-party read of the two, with four claims on that page checked against the docs.
Search for “Hermes Agent vs Vellum” and the top result is written by Vellum. Search for “Hermes Agent alternatives” and the top result is also written by Vellum, which ranks itself first with a score of 100 out of 100.
That is not a scandal. Vendors write comparison pages, and they are allowed to conclude that they win. It does mean nobody has published a read of this matchup that is not selling one of the two products. This is that read.
What each one actually is
Hermes Agent is a general-purpose agent harness from Nous Research, MIT licensed, written in Python, that you install on a machine you control. Its pitch is the learning loop: it writes reusable skills from experience and keeps memory across sessions. It is model-agnostic to an unusual degree, driving more than 300 models through hosted providers or a local runtime.
Vellum, in this context, is Vellum Assistant: a personal AI assistant, also MIT licensed, written in TypeScript, offered as a native Mac app, an iOS app, a web app, and through voice, email, Slack, Telegram, Microsoft Teams and Discord with shared memory. You can self-host it on a VPS or let Vellum Cloud run it.
The distinction that matters: Hermes optimizes for control and breadth, Vellum for polish and reach. A comparison that ignores that and picks a winner is doing marketing.
| Axis | Hermes Agent | Vellum Assistant |
|---|---|---|
| Model freedom | 95 | 60 |
| Ecosystem scale | 95 | 20 |
| Self-host control | 90 | 65 |
| Licence openness | 90 | 90 |
| Non-technical use | 35 | 90 |
| Managed hosting | 15 | 85 |
Four claims worth checking
Vellum’s comparison page makes specific, checkable assertions about Hermes. Four of them do not hold against the Nous documentation as of September 4, 2026.
| Vellum says | The documentation says |
|---|---|
| “No native scheduling. Bolt on cron or an external orchestrator.” | Hermes ships a built-in cronjob tool that can “schedule one-shot or recurring tasks; pause, resume, edit, trigger, and remove jobs”, across five schedule formats, with a no-agent mode that runs a plain script on a schedule |
| “Multi-hour setup: clone the repo, configure the environment, set up API keys, and host the runtime yourself.” | The installation page opens with “Get Hermes Agent up and running in under two minutes!” and gives a single curl one-liner, plus a desktop installer |
| “CLI and terminal-first with an optional web UI. No native mobile or messaging surfaces.” | There is a Hermes Desktop installer for macOS and Windows, and a messaging gateway covering around seventeen platforms including Telegram, Discord, Slack, WhatsApp and Signal |
| “Supports 200+ models via OpenRouter and self-hosted endpoints” | Nous Portal alone advertises “300+ frontier agentic models”, and Hermes additionally accepts any OpenAI-compatible endpoint |
The scheduler one is the most surprising, because Hermes’ cron support is more capable than the daily-briefings feature Vellum advertises on the same page. Jobs take relative delays, intervals, natural language, cron expressions or ISO timestamps, can skip the model entirely for script-only work, and can inject their own previous output into the next run so a recurring report can deduplicate against itself.
A related claim on Vellum’s alternatives post, that Hermes needs WSL2 on Windows, is also wrong: Nous documents a native Windows PowerShell installer.
Where Vellum genuinely wins
A comparison that never concedes anything is the thing this piece is trying not to be.
Vellum has a real native iOS app. Hermes reaches a phone through a chat gateway or Android via Termux, which is not the same experience as a Home Screen widget. If the requirement is an assistant that behaves like a consumer app on a phone, Vellum is straightforwardly better.
Vellum sells managed hosting. Hermes expects you to run it, and the cheap path is a VPS you maintain. For anyone who does not want to be the operator, a $30 a month managed plan is a genuine product and Hermes has no equivalent.
Vellum is also focused. Hermes is enormous, with a correspondingly large surface area of features, configuration and open issues. A smaller, newer, more opinionated codebase is easier to reason about, and TypeScript is a more familiar stack for a lot of people than Python.
Where Hermes wins
Scale and independence, mostly.
240,843 stars against 1,186 is not a quality metric, but it is a reasonable proxy for how many people have hit a given bug before you and how quickly integrations appear. Hermes predates Vellum by about seven months and had a v0.21.0 release on August 31, 2026 with six new inference providers in that release alone.
Model freedom is the sharper difference. Hermes will drive anything with an OpenAI-compatible endpoint, including models on your own hardware, and the practical cost range runs from free catalog tiers to frontier APIs. That optionality is the whole thesis of the harness-beats-the-model argument.
And the price floor is zero. Hermes is free software plus whatever tokens you use, which can itself be zero on a free model id or on local weights.
Which one to pick
| If this describes you | Pick |
|---|---|
| You want an assistant on your phone and do not want to operate it | Vellum |
| You want managed hosting with a support relationship | Vellum |
| You want to drive a specific model, or a local one | Hermes |
| You want the largest ecosystem and the most integrations | Hermes |
| You want the software to cost nothing | Hermes |
| You are comparing total running cost across both | See the personal AI agent cost breakdown |
The honest summary: if you are technical enough to be reading a comparison of two self-hostable MIT agents, you are probably the Hermes buyer, and the reason to consider Vellum is the phone.
Frequently asked questions
Frequently asked questions
- Is Vellum better than Hermes Agent?
- Neither is better across the board because they solve different problems. Vellum is a personal assistant with native mobile apps and managed hosting, which Hermes has no equivalent for. Hermes is an agent harness with a far larger ecosystem, any-model support and a zero software cost. Pick Vellum for a phone assistant somebody else runs, Hermes to own the stack.
- Is Vellum open source?
- Yes. The vellum-ai/vellum-assistant repository is MIT licensed and written in TypeScript, and it can be self-hosted on a VPS as well as run through Vellum Cloud. It is a much younger project than Hermes: created in February 2026, with 1,186 GitHub stars against 240,843, as read on September 4, 2026.
- Is Hermes Agent free?
- The software is free and MIT licensed. What you pay for is model tokens and hosting. Both can be zero: Hermes ships free model ids in its catalog and supports fully local inference, so a setup on hardware you already own costs only electricity. Vellum has a free tier with paid plans from $30 a month.
- Does Hermes Agent have a built-in scheduler?
- Yes, despite the vendor comparison saying otherwise. Hermes documents a unified cronjob tool that schedules one-shot and recurring tasks, and pauses, resumes, edits, triggers and removes jobs. It accepts relative delays, intervals, natural language, cron expressions and ISO timestamps, and can run a plain script on a schedule without invoking the model at all.
- Does Hermes Agent need WSL2 on Windows?
- No. Nous documents a native Windows installation path with its own PowerShell one-liner, separate from the Linux, macOS and WSL2 path, plus a Hermes Desktop installer for macOS and Windows. The claim that WSL2 is required appears on a competitor page and does not match the installation documentation.
Sources
- NousResearch (2026). hermes-agent repository (stars, forks, licence, creation date). Read via the GitHub API 2026-09-04. https://github.com/NousResearch/hermes-agent
- vellum-ai (2026). vellum-assistant repository (stars, forks, licence, language, creation date). Read via the GitHub API 2026-09-04. https://github.com/vellum-ai/vellum-assistant
- Vellum (2026). Vellum vs Hermes Agent (vendor comparison; the four quoted claims). Read 2026-09-04. https://www.vellum.ai/compare-assistants/vellum-vs-hermes-agent
- Vellum (2026). 10 Best Hermes Agent Alternatives in 2026 (vendor documentation; the self-ranking and the WSL2 claim), published 2026-08-26. https://www.vellum.ai/blog/best-hermes-agent-alternatives
- Vellum (2026). Pricing (Free, Mighty $30, Super $100, Ultra $200 per month). Read 2026-09-04. https://www.vellum.ai/pricing
- Nous Research (2026). Hermes Agent documentation: scheduled tasks (the built-in cronjob tool, schedule formats, no-agent mode). Verified 2026-09-04. https://nousresearch.github.io/hermes-agent/docs/user-guide/features/cron
- Nous Research (2026). Hermes Agent documentation: installation (the under-two-minutes claim, the curl and PowerShell one-liners, the desktop installer). Verified 2026-09-04. https://nousresearch.github.io/hermes-agent/docs/getting-started/installation
- Nous Research (2026). Hermes Agent documentation: Nous Portal (the 300-plus model figure). Verified 2026-09-04. https://nousresearch.github.io/hermes-agent/docs/integrations/nous-portal
Repository figures, prices and documentation quotes were verified against the sources above on September 4, 2026. Star counts move daily. The radar scores are editorial judgements drawn from those facts, not measurements. Vellum pages are cited as vendor documentation, not independent findings. See the editorial standards.