Comparison Summary
Comparison SummaryViktor is your Slack or Microsoft Teams agent that works out of the box. It's what we use and most of our team refuses to work without Viktor by now 😅 Hermes is an open source agent, and requires technical knowledge to setup and use. We don't recommend it for businesses.
ViktorBestBest overall AI agent
Best overall AI agent
HermesBest free and open source agent
Best free and open source agent
Editor's Verdict
Editor's VerdictWhats the difference between Viktor and Hermes?
Viktor is a managed AI agent that works inside Slack and Teams and takes action across 3,000+ tools. Hermes is a self-hosted agent you must install, configure, secure, and maintain yourself.
For teams, Viktor is the much better option. It onboards itself, works in plain language, and proactively takes work off your plate in Slack. Permissions let you control what it can access, so your team can adopt it without engineers.
Hermes suits technical users who specifically enjoy self-hosting and experimenting with open-source software. You get control over the software and configuration, but sessions can stall, maintenance never disappears, and security and reliability become your responsibility. Free software also does not mean free operation once hosting, model usage, and engineering time are included.
Agent Ownership
We often get this question:
What do you think about having your agent Viktor being not owned by you? In comparison to Hermes for example and building an agent that lives in Slack?
Our Head of Engineering, Bob, answered this best:
"I have played with most harness on the market at least a little bit with a few exceptions. The benefit with Viktor from is that it is friendly for non-technical people, it has good security guardrails, it is trained on actual business problems so when someone on our team, like Alex or Andra, asks for engineering work to be done, and they mis-use a programming term for example, instead of acting in an overly-literal way, it will relay to me "Alex implied that a feature was reverted, but I think he is referring to a possible UI regression" instead of opening a confusing ticket or introducing a new bug.
It causes us to really think hard about what we do or do not want to give it access to, and how much we do or do not want to trust it. We have (as a company) morphed Viktor into a perfect AI employee that doesn't overstep or run away on nonsense tasks.
It could be possible to get a similar experience from other automated harnesses but we aren't wasting our engineering time and resources on problems that the Viktor team has already solved. Plus, we get the benefit of the masses. If another Viktor customer has an obscure problem with an integration edge case, the bug might get fixed before we ever run into it. The point of Viktor is to save us time and energy and it seems likely that what we pay for Viktor is well worth the time it saves us solving any of these problems on our own."
He then continues "I believe in this so fundamentally that even as someone who loves programming and building products, I have my own personal Viktor account that I use for personal reasons. And the fact that it lives in Slack is just the icing on the cake. It already has all of the context it needs so its never hard to get Viktor up to speed. I have stopped thinking of Viktor as a harness and started thinking of it as a coworker."
Cost, Permissions & Model Quality Compared
Your daily driver model matters more than the platform you run it on. Pick a weak model as your everyday default and you'll feel it, pick a strong one and your bill climbs, but that's a model choice, not a Hermes-vs-Viktor thing. Run the same tier on either platform and the costs land in roughly the same place.
Alex, CEO of Efficient App recently explained this on X:
"We're using Opus 5.5 low as our main model, but even if you had it set to 5.6 Sol (same as you're using with Hermes), your Viktor bill would be WAY lower. The point is, Viktor is just doing a small margin mark-up on their discounted bulk rate, so versus sheer token credits, it's pretty much apples to apples.
Having Hermes use OAuth using the sub, then falling back to cheap models is definitely smart, but the problem that I'd see is that we'd blow through our sub limit + it'd share the sub context with all the team (data leak concern, unless you had each person set up on Hermes separately), and then you'd just result in having most of your team using the cheaper worse models much of the time.
If you're concerned about cost, you can just use Viktor and have cheap model set as default, and then set !deep to the better models only for important prompts where you need it.
My thesis is that the time savings that comes from our entire team of also 8 using a good model, and having a proper segmentation of permissions across all our team software is worth more than the $1,000–1,500/mo we pay for it."
Final Verdict
Before you go down the path of using Hermes, would genuinely encourage you to try Viktor. Here are $200 Viktor credits (you don't even need to put a credit card on file, you won't find this deal anywhere else).
Screenshots
Screenshots
Viktor
