AI OSS tool repo goes archived over night after raising $7.3M Seed (github.com)
192 points by hek2sch 6 hours ago
GabrielBianconi 3 hours ago
I'm the co-founder and CEO of TensorZero.
We started the company two and a half years ago, and raised $7.3m in 2024 (announced only almost a year later). We've spent less than half of this amount.
Earlier this week we came to the difficult decision to wind down the project. The open-source repository remains available on GitHub (Apache 2.0) but won't be actively maintained by the team moving forward.
bel8 an hour ago
Hi! First of all, congrats on getting much further than any of us will ever be able to dream. Having a well funded startup is no small feat.
Now one question that you probably get a lot and I must ask: why not pivot?
mat_b 4 minutes ago
He said the open source repo wont be maintained any longer. Isn't that a pivot to closed source?
faeyanpiraat 3 hours ago
Are there any lessons around the why which may be publicly shared ?
GabrielBianconi 2 hours ago
There are many factors at play here but if I had to pick one... an open-source company has to find product market fit twice: first for the OSS project and again for a commercial product. The AI market moves very quickly so it's easy to take a step in the wrong direction and fall behind.
I might publish a long-form reflection when the dust settles.
gavinray 2 hours ago
sdesol 36 minutes ago
cbsmith an hour ago
KennyBlanken 32 minutes ago
cluckindan 3 hours ago
What did you spend the money on?
The other half goes where?
GabrielBianconi 2 hours ago
Mostly salaries to support a small team.
We are returning the remaining capital to investors.
herodoturtle 2 hours ago
maxnevermind 2 hours ago
Barbing 2 hours ago
ianm218 3 hours ago
Is there anything your willing to share on what went into the decision/ what you learned about trying to build this kind of product?
GabrielBianconi 2 hours ago
See my sibling comment
LeonM 5 hours ago
The title makes it sound like they just did a seed round, but the seed round was announced in August of last year [0].
Their website landing page is now also showing the software is no longer maintained. No mention of why they made this decision, my best guess is they burned through their seed money and were unable to attract further investments.
[0]: https://www.tensorzero.com/blog/tensorzero-raises-7-3m-seed-...
pnw 4 hours ago
The company was started in January 2024, so the seed financing is likely a roll-up of two years of fundraising. $7m for ~30 months of running an AI startup in NYC is not that unusual.
RobotToaster 4 hours ago
Burning through $7m in 9 months? That's an impressive amount of avocado toast.
rfgplk 3 hours ago
$7m actually isn't a whole lot, especially if they hired a (larger) engineering team. Assuming their cali based, that's easily 150-200k per engineer, a team of 20 easily eats through that. Idk the specifics, but I don't the organization was fradulent, it could also be that they're going commercial and no longer want to maintain their oss stack
wtfleming 3 hours ago
DiggyJohnson 3 hours ago
j45 2 hours ago
vips7L 3 hours ago
whateveracct 3 hours ago
GabrielBianconi 3 hours ago
We raised in 2024 and only burned through ~$3m of it, mostly on salaries to support a small team.
yett 4 hours ago
And AI tokens
mmaunder 4 hours ago
api 4 hours ago
raverbashing 4 hours ago
Those Claude tokens are not cheap you know /s
hoppp 5 hours ago
The project was probably just built to raise funds, a bait, and after thats done it's dead.
jnovek 4 hours ago
Were the thousands of commits and hundreds of feature branches over the last 9 months just to keep up appearances, then? Were the 850 people who forked it in on the scheme, too?
pqtyw 4 hours ago
armchairhacker 4 hours ago
Blackthorn 3 hours ago
Sometimes things just fail.
realsarm 5 hours ago
You can call it a bait but where is VCs due diligence for this. Most VCs where out there defending their infra layers investment. Just look at YC batches and see the inflated number of infra startups.
jnovek 4 hours ago
Noaidi 4 hours ago
ajross 5 hours ago
root-parent 4 hours ago
sailingparrot 3 hours ago
Do you understand that when you raise money it doesn't go into your personal account? Its not like you can move this money in your retirement account and sail into the sunset.
kmac_ 4 hours ago
About one year ago, I created an LLM gateway with metrics, provider fallback and switching, tools support, injecting, etc. etc., and unique features like acting as an MCP tools client and server, all streamed, with low latency.
It was a simple project in terms of technical complexity. I didn't publish it as I counted several similar projects in the field.
Putting $7.3M into such a project would make sense only in the case of a precise growth plan with already declared customers and an promising sales funnel. There is no technical moat.
jnovek 4 hours ago
The calculus in “buy or build” has shifted for me over the last six months especially. If I can make an agent build it, I get the version that’s tailored for me.
> It was a simple project in terms of technical complexity.
That’s the thing, though. The version I build for myself sheds all the features that get in my way. I don’t share them either because they’re only useful for me.
Perhaps in the future big tech projects will be delivered with a common “core” and the expectation that agents fill in the use-specific stuff.
rfgplk 3 hours ago
> The calculus in “buy or build” has shifted for me over the last six months especially. If I can make an agent build it, I get the version that’s tailored for me.
I feel like this is really going to change the software industry moving forwards. Historically it was tedious and time consuming to actually develop tailored dev tools which is why so many organizations relied on third party solutions. When nowadays you can easily half bake something in a few hours and get it working, tailored _specifically_ to your needs.
jaggederest 3 hours ago
> Perhaps in the future big tech projects will be delivered with a common “core” and the expectation that agents fill in the use-specific stuff.
I suspect so, the headless / "api/cli only" tools like CRM are pretty big right now and I don't think we've seen the end of that trend, probably more like just beginning.
zackify 4 hours ago
That's literally every project around AI. All the agent sandboxes. Hosting cron jobs that just hit ai rest endpoints for model completions etc
jdw64 5 hours ago
VCs think, 'Apps are risky, infrastructure is safe,' so they invested in AI infra.
"infra is safe" Hmm, but that wasn't a good idea. because if an open source infrastructure project like TensorZero gets shut down this quickly, won't they start to realize that those investment theories are also risky?
The difficult thing about AI infrastructure is that, unlike other industries, it will not become fragmented. It will likely remain tied to specific big tech models. What does this mean? It means that because AI models are not yet standardized, the infrastructure itself is actually riskier. In other words, the privatization of standards is happening.
The challenge with AI infrastructure is that an independent, stable standard layer has not formed, unlike in other software infrastructure markets such as databases, web servers, cloud, and containers. Over time, those ecosystems developed relatively standardized interfaces and operational layers. But the LLM ecosystem is still evolving rapidly. Models themselves change fast, APIs differ, pricing differs, context windows, tool calling, structured output, evaluation, fine tuning, caching, routing, everything keeps changing.
So even if an infrastructure startup tries to build a common abstraction layer across multiple models, before that common layer can stabilize, big model or cloud providers like OpenAI, Anthropic, Google, AWS, or Azure can just absorb the same functionality directly. In the end, AI infrastructure is at high risk of becoming an attached feature of model providers rather than solidifying as an independent layer.
But if a startup that raised 7.3 million dollars fails this quickly, who would trust and invest in such things? That aside, it seems AI startups are all the rage these days. I also want to learn AI and get funded like that. Does anyone here trust me enough to invest? About one hundredth of that would probably be enough
GabrielBianconi an hour ago
Our investors aren't looking for safe, they're looking for a small chance in funding the next Databricks or similar. Most times it doesn't work out unfortunately, but that's part of the game.
(Also, we raised the capital in 2024 and didn't burn most of it.)
jdw64 an hour ago
First of all, I respect your decision. I apologize for speaking too hastily about your choices. What I was trying to do was simply talk about how incredibly fast AI infrastructure changes. I also understand your respect for investors looking for the next Databricks. But the reason I wrote what I did is because the confidence expressed in the README ended so early. That said, such confidence isn't necessarily a bad thing. Isn't it said that victory belongs to challengers like you, not cynical people like me? I feel bad about that part. Still, I have no intention of withdrawing my skeptical view about whether AI infrastructure can succeed as an open source startup. I'm very sorry it came across as if I was mocking your failure. That was not my intent. I was simply trying to leave a comment saying that AI infrastructure has a different direction from traditional infrastructure.
GabrielBianconi an hour ago
rfgplk 3 hours ago
A few comments.
> VCs think, 'Apps are risky, infrastructure is safe,' so they invested in AI infra.
First off, this isn't even infra in the infra sense of the word. Infrastructure implied something physical, a pure software product can almost never be considered 'infra'. A tool maybe, but not 'infra'.
VCs can also be irrational and driven primarily by personal connections rather than reason. I didn't do a deep dive in this project/leadership, but often who you know is some important than what you produced. There's a reason why a lot of VCs go for the old motto of "I'd rather invest in an A team with a C product; than invest in a C team with an A product".
realsarm 4 hours ago
I also believe the same. Many VCs are obsessed with moat that they clearly got wrong. To me the value created at app layers are so much that gives them the flexibility to diversify their infra layers. Good harnessed do not depend on a specific model provider or memory layer or etc that when it is taken down like anthropic fable they get no risk exposure. Many even after growing train their own model like what cursor did with composer. There’s many more examples in other verticals like manus, superhuman, fireflies, lovable, replit, cursor, nouswise, cline windsurf and kilo but many are concentrated in coding because again I think VCs have preferred this definition of moat.
jdw64 3 hours ago
Due to the echo chamber effect, our opinions get reinforced, which can lead to biased conclusions, so it gives me pause. But your comment is so eerily similar to my own thoughts that I'm writing this reply.
I agree that most people misunderstand the concept of a 'moat' and become obsessed with that misunderstanding. People tend to think that only technical 'coding skills' which they can easily understand constitute a moat. But in reality, the moat is the entire workflow across the product's lifecycle, including coing skills. In that sense, infrastructure workflows are nothing more than 'the most easily replaceable consumables.' The essential purpose of infrastructure is to pursue 'standardization,' which paradoxically means a state of 'zero switching costs' where customers (app developers) can switch at any time to a better API or a big tech built in feature. Pure technology that doesn't latch onto the messy real world domains of customers will inevitably be absorbed without resistance by massive capital.
In some ways, customer lock in at the application layer, or even the fan culture around a product, creates emotional lock in. The end user app that provides a specific workflow integrated into users' daily routines can overcome even technical inferiority through 'experience' and 'emotion.' Technology can be copied, but the user identity attached to a tool is what I think a real moat is.(That is also the reason I love Windows.)
The example you gave, Cursor's Composer, is exactly the case I'm talking about. I think Cursor is inferior, and I don't think its Composer model feature is all that great either. But Cursor has a passionate fan base, and users who choose Composer as the best value for money no longer care about absolute technical performance or benchmark scores. They are captivated by the 'speed of experience' of code being completed quickly as they intended, and the 'frictionless workflow' the tool provides.it's not the company that builds the best AI model that wins, but the company that wraps 'good enough technology' in 'great UX' and dominates users' habits. That is how apps dominate infrastructure, and that's the moat you and I are thinking about.
That said, this conclusion is probably too hasty and has many flaws. Still, your thoughts are so similar to mine that I'm leaving this reply. Thanks for the great comment. Have a good day
Eridrus 2 hours ago
Tell me you haven't talked to a VC.
A better model for VCs is: companies are finding tons of budget to allocate to new AI spend. Besides the labs, who is going to be able to capture some of that spend while they're actively looking to spend it?
Nobody at the seed stage is investing in things they think are "safe". They are investing in things they think have huge upside.
jdw64 an hour ago
Anyway, I wasn't trying to mock your profession. Here's what I think. Most VCs and investors have their own success formula. There will be VCs who succeeded by investing in infrastructure. But the question is whether that same success formula applies to AI startups right now. Of course, from your perspective, it might look like 'this clueless kid is just being cynical without knowing anything.' I partly agree. But that's not the core of my argument.
What I'm trying to say is that those success formulas themselves need to be reconsidered.An insider from up there came out and talked about the next 'Databricks,' believing that's the kind of potential they're looking for. All of them do. Everyone wants to be the first investor in a goldmine. I don't think this is just about greed
The question is whether the traditional infrastructure investment logic holds here. I think most current AI infrastructure tools are closer to 'temporary patches' that exist before the functionality gets internalized.
Let's say infrastructure is like a concrete building. Traditional IT infrastructure basically has a standards committee, and once that committee sets things, changes are extremely rare. It's a kind of 'lake.' But AI infrastructure right now is different from one to another; even the ecosystems differ—the Chinese ecosystem is different from the US ecosystem. It's a flowing 'river.' I just think the question is whether the old grammar can be applied in this situation.
You probably have more money, more investment experience, and more success than I do. I only have a lot of failure. But apart from that, the issue is simply that 'potential' in growth potential ends up being data measured against past examples, and the question is whether that data still holds up now. Anyway, I might have been slightly sarcastic earlier, so I apologize for that. Someone as successful as you, please bear with it a little.
jdw64 an hour ago
Sometimes people don't realize that 'professional' ideals and 'reality' are different.
What you're talking about seems like 'ideal' investing, not real world investing at all. Of course, the VCs in your country and the VCs in my country are different.
It's like in software, where everyone says you should write maintainable code within the norms, but in reality, most people don't do that
that investing in 'potential' is the basic principle of VCs. They call it the power law. But when you look at actual investment portfolios, it seems quite rare for people to follow only that principle. I guess you don't think so. Of course, I agree that ideal venture investing follows the power law. But in real world investing, there are pragmatic investors who operate somewhere between the ideal and reality. We always project ourselves onto the 'ideal,' but I don't think there are only people who are immersed in that ideal. Of course, no VC would invest in someone like me. I've met with VCs three times in my career, but they all turned me down. Haha.
pqtyw 4 hours ago
Infra is perhaps somewhat safe but realistically it's a really low margin capital intense business long-term unless you can lock-in customers with hundreds of services like AWS. So not a lot of space for a huge ROI.
> are all the rage these days
Are they? Overall it seems kind of tame compared to 2020-21 since VCs are somewhat risk average outside of a few outliers. Funding looks much more concentrated these days.
jdw64 4 hours ago
You're right. Looking at recent indicators, there are more stable investments than I thought. But please understand that, as a human, I haven't achieved ROI in terms of marriage, relationships, a stable job, etc., so my perspective might be mixed with a bit of envy
indigodaddy 4 hours ago
Just use Plexus [1]. The maintainer is not trying to be a hero or raise seed dollars or even really trying to promote it. He's just making an excellent, useful product. (Unaffiliated, just a happy user). It's not a full-on "LLMOps" platform (whatever that is), it's just a proxy that works very well and has some nice features.
pavlov 5 hours ago
This is the claim in the repo readme that presumably unlocked the VC investment:
“TensorZero is used by companies ranging from frontier AI startups to the Fortune 10 and fuels ~1% of global LLM API spend today.”
One percent seems like a lot. Anyone on HN use this?
GabrielBianconi 2 hours ago
We raised most of the capital before we had any traction. We raised on a rolling basis and had millions in the bank before we had even published the open-source repository. Ultimately we raised based on the team's background + vision.
The ~1% figure might be outdated today but it was a best-effort estimate a couple of months ago. TensorZero powered tens of trillions of inference tokens per month. TensorZero is not widely used but it was used by a couple of extreme-scale users.
pavlov an hour ago
Thank you, appreciate the response. It’s a great part of the HN community that there’s almost always someone around with the first-hand experience and facts.
Best of luck with whatever you do next!
spmurrayzzz 4 hours ago
I used it, but only briefly to evaluate it. It had some overlap with a tool I built myself, was curious if any of the extra features would be useful.
Ultimately I found the data model and UI to be both cumbersome and unintuitive. Langfuse ended up being the observability tool I went with instead over the one I built (and still use today).
sebmellen 4 hours ago
Generally speaking, every YC company post ~2020 is forced to make pathologically false claims to compete in the (fundraising) market.
ojosilva 4 hours ago
Just tell AI to write your copy and that's what you get, overhype-as-a-service.
croes 4 hours ago
Rounded to the nearest percent >0
lostmsu 4 hours ago
ceil(market_share)
bz_bz_bz 5 hours ago
Seed was in Aug ‘25 and website simply says the project will no longer be maintained: https://www.tensorzero.com/
GabrielBianconi 3 hours ago
Seed was in '24 actually but we only announced in '25.
DonHopkins 4 hours ago
Obviously they upgraded, bought a dash, and moved on to https://www.tensor-one.com/
_ache_ 4 hours ago
And new Github profile too.
hmokiguess 4 hours ago
There was a high severity advisory last week https://github.com/tensorzero/tensorzero/security/advisories... though these days can't even tell if this is related or just routine
GabrielBianconi 3 hours ago
This was coincidental. Someone reported the issue last week, we fixed it, and published the advisory.
MonstraG 5 hours ago
For people like myself, who didn't understand the timing of events - raised in august 2025, archived yesterday without any notice.
andruby 41 minutes ago
What are good OSS alternatives? Or do most users not bother with such infra tool?
hek2sch 6 hours ago
Most VCs avoided application layer believing it is too risky with few player would emerge as winner over application layers calling them GPT wrapper (now called Harness) and pouring money into infra layer. Would love to see your opinion about how this thesis would turn out going forward.
_pdp_ 5 hours ago
Not my experience. I think most VCs thesis is around the application layer - not much around the infrastructure.
That being said, while I am biased, there is a lot of work around infrastructure so calling it "just a wrapper" massively underestimates the effort - this is purely from my own experience building this space.
Besides, if it is true how come OpenClaw is spending so much money on a open source project. Salaries alone will cost 7 digit sum for a harness and I have first hand experience dealing with companies doing exactly this.
Shameful plug - we are building cbk.ai, better known today as chatbotkit.com.
SamDc73 4 hours ago
I'm glad I used litellm in my last project
variety8675 4 hours ago
Open source powers the business of many large corporations and they give essentially nothing back - why would maintainers refuse an offer for money in this environment?
xyst an hour ago
Among the first domino to fall leading up the AI bust. Hope my 401K won’t get decimated by this one.
feverzsj 4 hours ago
At least it's not a pig butchering scam.
krembo 2 hours ago
I don’t understand the commenters here who are attacking the entrepreneur. If it's not your money, then he is accountable only to his investors.
RIMR 34 minutes ago
You don't have to have money on something to have an opinion about it.
villgax 4 hours ago
Just switch to Bifrost already
rvz 5 hours ago
But it is written in Rust™.
shevy-java 4 hours ago
Guys - skynet is winning the war. We oldschool humans are left behind here.
Wasn't GitHub once a place for humans? Now we could rename it SkyHub.
BoredPositron 5 hours ago
Holy burn rate.
panny 5 hours ago
LOL, there's a sucker born every minute!
dilawar 5 hours ago
https://www.qwantz.com/index.php?comic=4483&mobile=1 couldn't resist.
PS: Someone won't become a trillionaire with this attitude.
panny 5 hours ago
That was funny, I'm not even mad. Upvote for you.
jdw64 5 hours ago
"I was assigned sucker at birth"