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Anthropic acquires Bun

bun.com

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Re: Anthropic acquires Bun

#431

Post by manojlds »

simonw wrote: post #390
bblaylock wrote: post #383

This reads more like Anthropic wanted to hire Jarred and Jarred wants to work with AI rather than build a Saas product around bun. I doubt it has anything to do with what is best for bun the project. Considering bun always seemed to value performance more than all else, the only real way for them to continue pursuing that value would be to move into the actual js engine design. This seems like a good pivot for Jarred…

It doesn't read like that to me at all. This reads to me like Anthropic realizing that they have $1bn in annual revenue from Claude Code that's dependent on Bun, and acquiring Bun is a great and comparatively cheap way to remove any risk from that dependency.

Really? What risk is even there?

Re: Anthropic acquires Bun

#432

Post by rvrb »

timeon wrote: post #405
rvrb wrote: post #323

Earlier quoted context omitted.

I haven't verified this, but I would be willing to bet that most of Bun's issues here have more to do with interfacing with JavaScriptCore through the C FFI than Zig itself. this is as much a problem in Rust as it is in Zig. in fact, it has been argued that writing unsafe Zig is safer than writing unsafe Rust: https://zackoverflow.dev/writing/unsafe-rust-vs-zig/

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Re: Anthropic acquires Bun

#433

Post by timeon »

munificent wrote: post #108
polskibus wrote: post #89

Wouldn’t it make more sense to write the same functionality using a more performant, no-gc language? Aren’t competitors praised for their CLIs being faster for that reason?

With AI tooling, we are in the era where rapid iteration on product matters more than optimal runtime performance. Given that, implementing your AI tooling in a language that maximizes engineer productivity makes sense, and I believe GC does that.

One would expect that "AI tooling" is there for rapid iteration and one can use it with performant languages. We already had "rapid iteration" with GC languages.

Re: Anthropic acquires Bun

#434

Post by knowitnone3 »

taylorlapeyre wrote: post #214
TekMol wrote: post #204

What is the business model behind open source projects like bun? How can a company "aquire" it and why does it do that? In the article they write about the early days We raised a $7 million seed round Why do investors invest into people who build something that they give away for free?

The post mentions why - Bun eventually wanted to provide some sort of cloud-hosting saas product.

Except Amazon would beat them to it

Re: Anthropic acquires Bun

#436

Post by almosthere »

_jab wrote: post #423
simonw wrote: post #390

Earlier quoted context omitted.

It doesn't read like that to me at all. This reads to me like Anthropic realizing that they have $1bn in annual revenue from Claude Code that's dependent on Bun, and acquiring Bun is a great and comparatively cheap way to remove any risk from that dependency.

This argument doesn’t make much sense to me. Claude Code, like any product, presumably has dozens of external dependencies. What’s so special about Bun specifically that motivated an acquisition?

If they found themselves pushing PRs to bun that got ignored and they wanted to speed up priority on things they needed, if the acq was cheap enough, this is the way to do it.

Re: Anthropic acquires Bun

#437

Post by juddlyon »

andrewl-hn wrote: post #45

I’ll be honest, while I have my doubts about the match of interests and cohesion between an AI company and a JS runtime company I have to say this is the single best acquisition announcement blog post I’ve seen in 20 years or so. Very direct, very plain and detailed. They cover all the bases about the why, the how, and what to expect. I really appreciate it. Best of luck to the team and hopefully the new home will su…

I had the same impression: bottom line up front, didn’t bury the lede, no weasel language.

Re: Anthropic acquires Bun

#439

Post by tpetry »

reactordev wrote: post #213

Bun is such a great runtime. If you haven't tried it, try it. It's got bells and whistles. This will make sure Bun is around for many, many , years to come. Thanks Anthropic. Why Bun? Easy to setup and go. bun run Bells and whistles. (SQL, Router, SPA, JSX, Bundling, Binaries, Streams, Sockets, S3) Typescript Supported. (No need to tsc, bun can transpile for you) Binary builds. (single executables for easy deployment…

Its not 100% nodejs compatible. I see enough non-green dots in their own official report https://bun.com/docs/runtime/nodejs-compat

And even in packages with full support you can find many github issues that bun behaves directly which leads to some bugs.

Re: Anthropic acquires Bun

#440

Post by robertjpayne »

Karrot_Kream wrote: post #409
mritchie712 wrote: post #68

> At the time of writing, Bun's monthly downloads grew 25% last month (October, 2025), passing 7.2 million monthly downloads. We had over 4 years of runway to figure out monetization. We didn't have to join Anthropic. I believe this completely. They didn't have to join, which means they got a solid valuation. > Instead of putting our users & community through "Bun, the VC-backed startups tries to figure out monetizat…

> They didn't have to join, which means they got a solid valuation. Did they? I see a $7MM seed round in 2022. Now to be clear that's a great seed round and it looks like they had plenty of traction. But it's unclear to me how they were going to monetize enough to justify their $7MM investment. If they continued with the consultancy model, they would need to pay back investors from contracts they negotiate with other…

They had a second round that was $19m in late 2023. I don't doubt for a second that they had a long runway given the small team.
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