funding_articleMay 20, 2026Confidence: high
Bun is joining Anthropic
Raised a $7 million seed round led by Kleiner Perkins shortly after v0.1.0 launch in July 2022.
Affected score: yesObserved: May 20, 2026Round: SeedAmount: $7 m
raisedseed
B
Bun
AcquiredMarket data is refreshed once per day from public sources. Information may be incomplete or outdated — verify independently before making decisions. This is not investment advice.
Beta
DealFlow OS uses public web data and automated enrichment. Research may be incomplete, outdated, or incorrect. Verify important information before making investment or outreach decisions.
Investor read
Evidence-bound summary — expand sections for movement, risks, and signals.
Memo snapshot · May 20, 2026, 5:52 PM
Beta
DealFlow OS uses public web data and automated enrichment. Research may be incomplete, outdated, or incorrect. Verify important information before making investment or outreach decisions.
What they do
Bun — A fast all-in-one JavaScript runtime Official product site and documentation entry point.
Funding
Raised $7M across 2 funding rounds. Latest: $7M Seed (Aug 2022). Investors: Kleiner Perkins, Y Combinator, Guillermo Rauch. (High).
Quick read
- •Bun — A fast all-in-one JavaScript runtime Official product site and documentation entry point.
- •Reported angle: Blog | Bun
- •Indexed activity snapshot: 2 funding‑related row(s), 0 hiring‑related, 0 GitHub‑tagged, 3 product/news‑style — scoring reflects corpus coverage only.
Stage
Unknown
Evidence summary
Verified facts
- •Bun — A fast all-in-one JavaScript runtime Official product site and documentation entry point.
- •Reported angle: Blog | Bun
- •Indexed activity snapshot: 2 funding‑related row(s), 0 hiring‑related, 0 GitHub‑tagged, 3 product/news‑style — scoring reflects corpus coverage only.
Recent movers
- •May 11, 2026 · Blog / news — Blog | Bun
- •May 20, 2026 · bun.com — Bun is joining Anthropic
- •May 20, 2026 · kleinerperkins.com — Celebrating Bun | Kleiner Perkins
- •May 11, 2026 · Blog / news — Blog | Bun
- •May 20, 2026 · bun.com — Bun is joining Anthropic
- •May 20, 2026 · kleinerperkins.com — Celebrating Bun | Kleiner Perkins
- •Kleiner Perkins
- •Y Combinator
- •Guillermo Rauch
Funding
Raised $7M across 2 funding rounds. Latest: $7M Seed (Aug 2022). Investors: Kleiner Perkins, Y Combinator, Guillermo Rauch. (High).
Hiring
No hiring/careers evidence indexed (Low).
GitHub
No GitHub‑linked evidence indexed (Low).
Product / news
3 product/news‑styled row(s); headline risk without filings (High).
Traffic / social
No traffic/social evidence indexed (Low).
Funding & hiring signals
Open roles (indexed)
No open roles indexed yet.
Failed or blocked links
- public_page:_pressnot_foundLast checked Mon, May 11, 04:17 AM
HTTP 404
- public_page:_newsnot_foundLast checked Mon, May 11, 04:17 AM
HTTP 404
- public_page:_companynot_foundLast checked Mon, May 11, 04:17 AM
HTTP 404
- public_page:_aboutnot_foundLast checked Mon, May 11, 04:17 AM
HTTP 404
DealFlow growth score
42.0Limited recent public signal
7D+0%
30D+0%
Needs Review
The score is an algorithmic estimate based on observed public company-level signals. It may be incomplete, stale, or inaccurate and is not investment, legal, tax, or business advice.
Source health
- public_market_enrichmentokLast checked Mon, May 11, 04:17 AM
- public_page:_jobsokLast checked Mon, May 11, 04:17 AM
- public_page:_careersokLast checked Mon, May 11, 04:17 AM
- public_page:_blogokLast checked Mon, May 11, 04:17 AM
- public_page:_okLast checked Mon, May 11, 04:17 AM
- public_page:homeokLast checked Mon, May 11, 04:17 AM
DealFlow score momentum
427D +030D +0
100500
More runs will build history.
The score is an algorithmic estimate based on observed public company-level signals. It may be incomplete, stale, or inaccurate and is not investment, legal, tax, or business advice.
Signal breakdown
Latest momentum signal per category. Expand a card to inspect raw payloads.
Public source summary
- Total evidence rows
- 5
- Latest evidence
- Wed, May 20, 05:51 PM
Source types found
blogcompany_sitefunding_articlepress
Strongest / recent news-style rows
Celebrating Bun | Kleiner Perkins
Wed, May 20, 05:51 PM · confidence 85%high quality
https://www.kleinerperkins.com/perspectives/celebrating-bun/Bun is joining Anthropic
Wed, May 20, 05:51 PM · confidence 88%high quality
https://bun.com/blog/bun-joins-anthropic
Public signal timeline
Newest first · 5 event(s)
1
Wed, May 20, 05:51 PM · company_site · 85% · verified_publichigh quality
Source ↗Bun — A fast all-in-one JavaScript runtime
Official product site and documentation entry point.
2
Wed, May 20, 05:51 PM · press · 85% · verified_publichigh quality
Source ↗Celebrating Bun | Kleiner Perkins
Kleiner Perkins led Bun's seed and reflects on production adoption and Anthropic deal.
3
Wed, May 20, 05:51 PM · funding_article · 88% · verified_publichigh quality
Source ↗Bun is joining Anthropic
Raised a $7 million seed round led by Kleiner Perkins shortly after v0.1.0 launch in July 2022.
4
Mon, May 11, 04:17 AM · blog · 90% · publichigh quality
Source ↗Blog | Bun
Source: Blog / news
Blog posts about Bun, the incredibly fast all-in-one JavaScript runtime
5
Wed, May 20, 05:51 PM · press · 85% · verified_publiclow quality
Source ↗oven-sh/bun on GitHub
Open-source repository for the Bun runtime and toolchain.
Official / company site
1 row(s)
company_site·Wed, May 20, 05:51 PM·Confidence 85%high qualityverified_public
Bun — A fast all-in-one JavaScript runtime
Official product site and documentation entry point.
https://bun.sh/News
1 row(s)
press·Wed, May 20, 05:51 PM·Confidence 85%high qualityverified_public
Celebrating Bun | Kleiner Perkins
Kleiner Perkins led Bun's seed and reflects on production adoption and Anthropic deal.
https://www.kleinerperkins.com/perspectives/celebrating-bun/Funding / news
1 row(s)
funding_article·Wed, May 20, 05:51 PM·Confidence 88%high qualityverified_public
Bun is joining Anthropic
Raised a $7 million seed round led by Kleiner Perkins shortly after v0.1.0 launch in July 2022.
https://bun.com/blog/bun-joins-anthropicGitHub
1 row(s)
press·Wed, May 20, 05:51 PM·Confidence 85%low qualityverified_public
oven-sh/bun on GitHub
Open-source repository for the Bun runtime and toolchain.
https://github.com/oven-sh/bunBlog
1 row(s)
blog·Mon, May 11, 04:17 AM·Confidence 90%high qualitypublic
Blog | Bun
Source name: Blog / news
Blog posts about Bun, the incredibly fast all-in-one JavaScript runtime
https://bun.sh/blogPrivate workspace
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