ClickHouse acquires Langfuse
108 points
4 hours ago
| 13 comments
| langfuse.com
| HN
CuriouslyC
2 minutes ago
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As a big Clickhouse fan, agent evals are where their product really shines. They're buying into market segment where their product is succeeding so they can vertically integrate and tighten up the feedback loop.
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rr808
1 hour ago
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Just did a funding round. In a sign of the times clickhouse used to be an interesting DB product, but is now a "database software that companies can use as they develop AI agents "

<i>Database technology startup ClickHouse Inc. has raised $400 million in a new funding round that values the company at $15 billion — more than double its valuation less than a year ago. </i>

https://www.bloomberg.com/news/articles/2026-01-16/clickhous...

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gyre007
2 hours ago
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> Our goal continues to be building the best LLM engineering platform

Interesting headline for a checks notes time series database company.

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dangoodmanUT
1 minute ago
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Your notes aren't very good. They're not a time series database company, they're a columnar database company. But yeah the LLM bit is weird, database companies _always_ feel like charlatans when it comes to LLMs.
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michaelmior
1 hour ago
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Note that the headline is from Langfuse, not ClickHouse. Reading the announcement from ClickHouse[0], the headline is "ClickHouse welcomes Langfuse: The future of open-source LLM observability". I think the Langfuse team is suggesting that they will be continuing to do the same work within ClickHouse, not that the entire ClickHouse organization has a goal of building the best LLM engineering platform.

[0] https://clickhouse.com/blog/clickhouse-acquires-langfuse-ope...

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wodenokoto
45 minutes ago
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Language models are time series models.

It’s great when you get this insight as a student of NLP, because suddenly your toolset grows quite a bit.

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cs554
48 minutes ago
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"Berkshire Hathaway Inc. is an American multinational conglomerate holding company" is a weird thing for a textile manufacturer to call itself. Almost like...businesses expand and evolve?

(they've never been a time series database company either lol)

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stingraycharles
1 hour ago
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That’s what you get when you raise a lot of VC capital. Just being the best timeseries database is not enough.
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ponywombat
3 hours ago
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Ah, the painful migration to Clickhouse from v2 to v3 makes sense now https://langfuse.com/self-hosting/upgrade/upgrade-guides/upg...
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bezbac
3 hours ago
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Congratulations to everyone involved, quite remarkable considering Langfuse was only founded as part of YC 23.
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dangoodmanUT
51 seconds ago
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The fact that all metrics are relative doesn't suggest they got an amazing deal
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shmichael
2 hours ago
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Without the purchase price, it is unclear whether this deserves congratulations or condolences.

Two years in the LLM race will have definitely depleted their seed raise of $4m from 2023, and with no news of additional funds raised it's more than likely this was a fire sale.

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jascha_eng
22 minutes ago
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It was not a fire sale I'm pretty sure. Langfuse has been consistently growing, they publish some stats about sdk usage etc so you can look that up.

They also say in the announcement that they had a term sheet for a good series a.

I think the team just took the chance to exit early before the llm hype crashes down. There is also a question of how big this market really is they mostly do observability for chatbots but there are only so many of those and with other players like openais tracing, pydantic logfire, posthog etc they become more a feature than a product of its own. Without a great distribution system they would eventually fall behind I think.

2 years to a decent exit (probably 100m cash out or so with a good chunk being Clickhouse shares) seems like a good idea rather than betting on that story to continue forever.

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stuartjohnson12
2 hours ago
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Anecdotally, from the AI startup scene in London, I do not know folks who swear by Langfuse. Honestly, evals platforms are still only just starting to catch on. I haven't used any tracing/monitoring tools for LLMs that made me feel like, say, Honeycomb does.
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7thpower
45 minutes ago
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I love langfuse, it is my goto.
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7thpower
43 minutes ago
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Langfuse has been my favorite LLM observability solution so far. Hopefully this acquisition makes it better, not worse.
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jimmySixDOF
2 hours ago
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I predict it will be Pydantic next to get picked up by someone for logfire and agent framework.... fine as long as all these open source projects stay open source then good for them
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kmlx
4 hours ago
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maybe clickhouse can finally make sense of the langfuse documentation
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swyx
3 hours ago
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(congrats team! such a joy to see you succeed)

every single day there is an acquisition on here. what's going on in the macro?

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mritchie712
3 hours ago
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the "Prompt Management" part of these products always seemed odd. Does anyone use it? Why?
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pprotas
1 hour ago
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Iterating on LLM agents involves testing on production(-like) data. The most accurate way to see whether your agent is performing well is to see it working on production.

You want to see the best results you can get from a prompt, so you use features like prompt management an A/B testing to see what version of your prompt performs better (i.e. is fit to the model you are using) on production.

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dandelionv1bes
3 hours ago
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I do understand why it’s a product - it feels a bit like what databricks has with model artifacts. Ie having a repo of prompts so you can track performance changes against is good. Especially if say you have users other than engineers touching them (ie product manager wants to AB).

Having said that, I struggled a lot with actually implementing langfuse due to numerous bugs/confusing AI driven documentation. So I’m amazed that it’s being bought to be really frank. I was just on the free version in order to look at it and make a broader recommendation, I wasn’t particularly impressed. Mileage may vary though, perhaps it’s a me issue.

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alexpadula
3 hours ago
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I thought the docs were pretty good just going through them to see what the product was. For me I just don't see the use-case but I'm not well versed in their industry.
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dandelionv1bes
2 hours ago
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I think the docs are great to read, but implementing was a completely different story for me, ie, the Ask AI recommended solution for implementing Claude just didn’t work for me.

They do have GitHub discussions where you can raise things, but I also encountered some issues with installation that just made me want to roll the dice on another provider.

They do have a new release coming in a few weeks so I’ll try it again then for sure.

Edit: I think I’m coming across as negative and do want to recommend that it is worth trying out langfuse for sure if you’re looking at observability!

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tuananh
4 hours ago
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how does it benefit for clickhouse?
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ushakov
3 hours ago
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they want to enter the llm observability market and langfuse has already built a convenient wrapper around clickhouse that companies have adopted

https://clickhouse.com/blog/clickhouse-raises-400-million-se...

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tuananh
2 hours ago
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thank you! i missed that news
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Nora23
2 hours ago
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Does this mean Langfuse will now have better ClickHouse integration?
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mercurialsolo
3 hours ago
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Clickhouse needs observability models to be more useful to agent run infra
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