Congrats to Can on the pre-seed funding. genuinely wishing you all the best.
The terminal multiplexer / multi-agent coding space is getting very crowded. YC alone has funded many competing startups in this space: herdr, Superset, cmux, Emdash, Orca, Bullet, Conductor (Conductor was in YC before pivoting from chat->coding). I’m probably missing a few, and that’s before counting companies outside YC such as Superlogical and Agentastic.dev (by yours truly).
One thing I find particularly interesting is the role of open source in this market.
A lot of these products started open source (i assume as a tactical way to gain traction and build a community). But after the early traction phase or raise funding, the incentives seem to change.
Being open source by itself is not a product differentiator in this market. The features required for string positioning (orchestration, cloud, custom agents, enterprise features, hosted infrastructure, etc.) often end up either closed source or available only through the hosted product.
That makes me wonder how much developers actually value OSS for this category. How much does it matter to you whether your IDE or coding environment is open source?
Is OSS important because you want to inspect the code, fork it, self-host it, avoid vendor lock-in, or simply because you trust open-source developer tools more? Or, for desktop software like IDEs is open source mostly a nice-to-have rather than a requirement? So I’m curious where HN lands on this
This title is killing me. "The runtime stays open" is such a heavy, attention grabbing sentence, it's all I can stare at on the front page. It's the type of writing that makes me hate working with LLMs, because it's so powerful at monopolizing my attention, and makes it difficult for me to focus on any of the other words on the page (whether the front page, or the comments page).
Congrats to the herdr team! Please don't abandon the open source part of the business when the cash starts flowing... every open source project that does a bait'n'switch is a stab at the viability of open source as a whole
As a relatively recent herdr user, I’ll say (1) congratulations and (2) the thing that was most attractive was the seeming orthogonality of the tool. It sits apart, interfaces with subordinate programs in a few clearly delineated ways, and integrates them only as much as the user desires. Critically, “no integration just show me the terminal output of my program” is an option, and a useful one!
I appreciate that discipline and respect for your user in the current tool, and hope to be a paying customer of a similarly values-aligned business you’ll build on top of it!
Congrats to Can! I am using Herdr and i think its a great tool. A modern solo dev success story , very inspirational.
I see some negative comments here that I could understand why funding scares them when it comes to their open source tool but like.. atleast congratulate the guy.
I have a bit of a contrarian thought here, but I tried Herdr and I didn't like it. To me, it kind of proved the opposite point it intended, in that agent orchestration actually belongs at the terminal level. I'd like to see for example a fork of Ghostty become the agent orchestration control room.
What's the purpose of this project? Only to close the lid and let agent work in the background? Really that's what I found useful on project's homepage
I've been using Herdr for a while now, but I'd like a multiplexer that's also a meta-harness that I can connect to remotely. I know others have setups that work, I just haven't quite figured it out yet.
I started using Herdr and I really like it. Since the main features I wanted are already there, I have no issue with the commercialization. I still wonder how this can be turned into a profitable business. It'll be really interesting to follow Herdr's future. All the best to the founder!
I switched from tmux to Herdr about six weeks ago. It's a great bit of software, the UI is focused on switching between multiple agents quickly. I run Herdr to keep my opencode instances well managed, and it also works great for having a few terminals opens next to your agent. I find myself keeping opencode sessions open for longer like what happens with Codex and Claude code, which is great if I need to revisit a context to do some follow up work. I'm genuinely excited to see if the creators can bring even more value to the application.
If you're worried about enshittification I wouldn't be. It's relatively basic open source software that runs locally. A perfect candidate for a fork if the base app starts degrading.
I thought I'd share that hydra recently added support for herdr directly. It is an agent multiplexer of its own, but can directly create herdr tabs for sessions:
Congratulations! I came across herdr a few weeks ago and I've been daily driving it ever since. I've tried a few other tools like Emdash and Superset but Herdr is the only one that did a decent job rendering Claude code UI and didn't randomly crash and could run on a remote server.
A nice little asciinema demo would be helpful on the TUI page. I should be able to see what it is, how it presents the contained agents, etc.
I've been evaluating a few of these (and built one into another project I was working on, almost by accident), and am mostly looking for a frontend agnostic, terminal only (not harness) which can submit instructions to agents one line at at time with rate-limiting.
I was also surprised by tmux being built on shared memory when I tried to route it over a vsock to a VM. One of the annoyances with tmux is it's failure to forward environment changes to the individual tabs (such as an option when attaching), or allow for something like a ssh-agent forwarder (shouldn't be built in though).
I am a HUGE herdr fan - discovered it a few months ago and it's exactly what I need for my workflow. Thousands of others have discovered it as well, which is awesome.
I have such mixed feelings about this - YC means VC means commercialization means enshitification. I really wish that weren't the case, but it so very often is.
Here's hoping this one's different...
(PS I am a big YC fan in general! I don't mean to sound anti-YC or anti-VC or anti-capitalism. But when it comes to low-level essential development tools, I'll never forget what happened to Warp, which started out as such a nice clean terminal project and turned into an absolute money-chasing mess.)
I've tried Herdr a couple of times, and just can't get into it. I think what's off putting is another layer of keyboard shortcuts over my terminal...I don't see what it's doing that Wezterm and a bunch of splits does anyway? I'm almost certainly missing the point.
Wow, congrats! Can you discuss how you got YCombinator to select your open source project? I know they sometimes fund open source… I’ve been building several large platforms since 2011 but I have never considered applying like that.
Quick question: Would you have actually donated to Herdr if they were asking for donations? I don't think any of you would have, unless stated otherwise.
So this is another reason why developers do not pay for their tools and instead the developers of these tools go to VCs anyway. It's not the fault of the author, but most of the users (developers themselves) always want their tools for free at $0.
You have to pay and support the tools you use or else the VCs will do it for you so you can't complain when scenarios like this keep happening.
Herdr is joining Y Combinator. The runtime stays open
(herdr.dev)274 points by collinmanderson 6 August 2026 | 184 comments
Comments
The terminal multiplexer / multi-agent coding space is getting very crowded. YC alone has funded many competing startups in this space: herdr, Superset, cmux, Emdash, Orca, Bullet, Conductor (Conductor was in YC before pivoting from chat->coding). I’m probably missing a few, and that’s before counting companies outside YC such as Superlogical and Agentastic.dev (by yours truly).
One thing I find particularly interesting is the role of open source in this market.
A lot of these products started open source (i assume as a tactical way to gain traction and build a community). But after the early traction phase or raise funding, the incentives seem to change.
Being open source by itself is not a product differentiator in this market. The features required for string positioning (orchestration, cloud, custom agents, enterprise features, hosted infrastructure, etc.) often end up either closed source or available only through the hosted product.
That makes me wonder how much developers actually value OSS for this category. How much does it matter to you whether your IDE or coding environment is open source?
Is OSS important because you want to inspect the code, fork it, self-host it, avoid vendor lock-in, or simply because you trust open-source developer tools more? Or, for desktop software like IDEs is open source mostly a nice-to-have rather than a requirement? So I’m curious where HN lands on this
I'm curious what the actual problems with AGPL were.
I appreciate that discipline and respect for your user in the current tool, and hope to be a paying customer of a similarly values-aligned business you’ll build on top of it!
I see some negative comments here that I could understand why funding scares them when it comes to their open source tool but like.. atleast congratulate the guy.
If you're worried about enshittification I wouldn't be. It's relatively basic open source software that runs locally. A perfect candidate for a fork if the base app starts degrading.
https://github.com/smagnuso/hydra-acp
I use cmux because I like tabbed terminals on macOS grouped by project, saves messing with our daft window management.
What is it that makes herdr et al so popular with LLM users?
I've been evaluating a few of these (and built one into another project I was working on, almost by accident), and am mostly looking for a frontend agnostic, terminal only (not harness) which can submit instructions to agents one line at at time with rate-limiting.
I was also surprised by tmux being built on shared memory when I tried to route it over a vsock to a VM. One of the annoyances with tmux is it's failure to forward environment changes to the individual tabs (such as an option when attaching), or allow for something like a ssh-agent forwarder (shouldn't be built in though).
I have such mixed feelings about this - YC means VC means commercialization means enshitification. I really wish that weren't the case, but it so very often is.
Here's hoping this one's different...
(PS I am a big YC fan in general! I don't mean to sound anti-YC or anti-VC or anti-capitalism. But when it comes to low-level essential development tools, I'll never forget what happened to Warp, which started out as such a nice clean terminal project and turned into an absolute money-chasing mess.)
Good luck!
VC funding can enshitify things but it can also improve them. Here’s hoping for the latter.
Would something like this qualify:
https://github.com/Qbix
https://github.com/Intercoin
https://github.com/Safebots/Safecloud
So this is another reason why developers do not pay for their tools and instead the developers of these tools go to VCs anyway. It's not the fault of the author, but most of the users (developers themselves) always want their tools for free at $0.
You have to pay and support the tools you use or else the VCs will do it for you so you can't complain when scenarios like this keep happening.