Associated Anthropic post: https://www.anthropic.com/news/anthropic-acquires-bun-as-cla...

Is Claude Code the first CLI tool to have a $1BN ARR?

Congratulations to the bun team!

I use Claude Code CLI daily - it's genuinely changed how I work. The $1B number sounds crazy but honestly tracks with how good the tool is. Curious how Bun integration will show up in practice beyond the native installer.

Love bun! Congratulations!

Congrats...

> Long-term stability. a home and resources so people can safely bet their stack on Bun.

Isn't it the opposite? Now we've tied Bun to "AI" and if the AI bubble or hype or whatever bursts or dies down it'd impact Bun.

> We had over 4 years of runway to figure out monetization. We didn't have to join Anthropic.

There's honestly a higher chance of Bun sticking out that runway than the current AI hype still being around.

Nothing against Anthropic but with the circular financing, all the debt, OpenAI's spending and over-valuations "AI" is the riskier bet than Bun and hosting.

:(

Anthropic? The AI people?

The Bun team works hard, glad to see it pay off.

Oh no ... unfortunately this likely means a Bun.AI API in my JS runtime.

What matters: it's staying open source and MIT licensed. I sincerely hope it stays that way. Congrats to the Bun team on making a great tool and getting the recognition they deserve.

> Being part of Anthropic gives Bun: Long-term stability.

Let's see. I don't want to always be the downer but the AI industry is in a state of rapid flux with some very strong economic headwinds. I wouldn't confidently say that hitching your wagon to AI gives you long term stability. But as long as the rest of us keep the ability to fork an open source project I won't complain too much.

(for those who are disappointed: this is why you stick with Node. Deno and Bun are both VC funded projects, there's only one way that goes. The only question is timeline)

Godspeed. Seems like a good pairing. Bun is sort of the only part of the JS ecosystem I like, and Code has become such an important tool for my work, that I think good things will come out of this match. Go Bundler as well.

Hope nobody buys Astral or Python is f*cked.

Congrats. This is the first time I remember reading a genuine, authentic story about a sale. Much preferred over “this is about continuing the mission until my earn-out is complete.”

I don't really see how Bun fits as an acquisition for an AI company. This seems more like "we have tons of capital and we want to buy something great" than "Bun is essential to our core business model".

   "the full platform"

First major success story for Zig language? (Not trying to diminish Bun's team success)

Makes sense, I had idea how else the investors would have made money on a javascript bundler/jsc frontend

This somewhat answers the question of "how on earth is a JS runtime company going to profit?"

Curious about the deal value/price — any clues whether it was just to make existing investors even (so say up to $30M) or are we talking some multiple? But if it's a multiple, even 2x sounds a bit crazy.

What?

Why?

Reminds me of Atlassian buying an AI browser.

I’m curious to what the acquisition price was. Bun said they’ve raised $26 million so I’m assuming the price tag has to be a lot higher than that for investors to agree to an acquisition.

I don't get it. Why would Anthropic need to own a JS runtime?

As someone who have been using Deno for the last few years, is there anything that Bun does better? Bun seems to use a different runtime (JSC) which is less tested than V8, and might also perform worse in real-world tasks (maybe not anymore?). The last time I checked Bun's source code, it was... quite messy and spaghetti-like, plus Zig doesn't really offer many safety features, so it's not that hard to write incorrect code. Zig does force some safety with ReleaseSafe IIRC, but it's still not the same as even modern C++, let alone Rust.

I'll admit I'm somewhat biased against Bun, but I'm honestly interested in knowing why people prefer Bun over Deno.

Bun has completely changed my outlook on the JS ecosystem. Prior to Bun, there was little focus on performance. Now the entire space rallies around it.

Congrats to Jarred and the team!

Hahaha congratulations. This is amazing. The most unlikely outcome for a devtools team. Fascinating stuff.

This is promising for Astral et al who I really like but worried about their sustainability. It does point to being as close to the user as possible mattering.

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 support them well.

This decision is honestly very confusing to me as a constant user of Claude Code (I have 3 of them open at the moment.)

So many of the issues with it seem to be because ... they wrote the damn thing in JavaScript?

Claude is pretty good at a constrained task with tests -- couldn't you just port it to a different language? With Claude?

And then just ... the huge claude.json which gets written on every message, like ... SQLite exists! Please, please use it! The scrollback! The Keyboard handling! Just write a simple Rust or Go or whatever CLI app with an actual database and reasonable TUI toolkit? Why double down and buy a whole JavaScript runtime?

It's more honest than the Replicate answer but I think inevitably if you can't raise the next round and you get distracted by the shiny AI that this is the path taken by many teams. There is absolutely nothing wrong with that. There was an exuberant time when all the OSS things were getting funded, and now all AI things get funded. For many engineer founders, it's a better fit to go build deep technical stuff inside a bigger company. If I had that chance I would probably have taken it too. Good luck to the Bun team!

Well this just created a lot of work for me. Everything’s turning to shit at an alarming rate.

>If most new code is going to be written, tested, and deployed by AI agents

That perspective following “in two-three years” makes me shudder, honestly.

> 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 monetization" – thanks to Anthropic, we can skip that chapter entirely and focus on building the best JavaScript tooling.

I believe this a bit less. It'll be nice to not have some weird monetization shoved into bun, but their focus will likely shift a bit.