About Bun
Bun is a Technology company based in San Francisco (United States) founded in 2019 by Jarred Sumner, and was acquired by Anthropic in December 2025. It operates as a javaScript and TypeScript applications are developed via an IDE-based platform. Bun has raised $7 million across 1 funding round from investors including Anthropic, Kleiner Perkins and Johannes Schickling. Its chief executive is Jarred Sumner. Its website bun.sh draws about 141 thousand monthly visits. Its focus areas include Enterprise Infrastructure, Application Development Tools, Code Development and Integrated Development Environment. Its competitors include Xamarin, Progress, Azul Systems, Posit and Qt Group and 2 more; 6 of its 7 listed competitors have raised funding.
Company details
Bun was founded in 2019 in San Francisco, United States, as an IDE-based toolkit for JavaScript and TypeScript application development. Runtime, bundler, test runner, and package manager functionalities are integrated to facilitate project development, testing, bundling, and execution. APIs are provided for common development tasks within the software sector. Operations are centered in the United States.
Funding Insights of Bun
Bun has successfully raised a total of $7M through 1 strategic funding round. The most recent funding activity was a Seed round of $7 million completed in August 2022. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $7M
- Total Rounds 1
- Last Round Seed — $7M
- First Round $7M
(Aug 2022)
- Investors Count 2
All 1 funding rounds of Bun with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Aug 2022 | $7M | Seed | – | Kleiner Perkins |
3 investors in total: 2 institutional and 1 angel.
Investors in Bun
Bun has secured backing from 3 investors, including venture fund, angel, and institutional investors. Prominent investors backing the company include Anthropic, Kleiner Perkins and Johannes Schickling.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Venture capital firm investing in early-stage tech startups | 1972 | kleinerperkins.com | Menlo Park, United States | |
AI models and chatbots are offered for industry applications. | 2021 | anthropic.com | San Francisco, United States | |
JS Johannes Schickling | Angel investor and entrepreneur, co-founder of Prisma, focused on tech startups | – | unknown_9235a411030f4b12a | - |
Investor details for Bun
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People of Bun
1 people are tracked at Bun (1 in leadership).
| Name | Role | Group |
|---|---|---|
Jarred Sumner | Founder & CEO | Leadership |
Complete people profiles for Bun
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Timeline of Bun
3 dated milestones of Bun across 6 years, from founding to its latest funding, stage changes and deals.
- Founded Bun is founded.
- Funding First funding round of $7.0M.
- Exit Acquired by Anthropic.
Competitors of Bun
Bun has 7 listed competitors in our database, 6 of them funded. They include Xamarin, Progress, Azul Systems, Posit and Qt Group, among others.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| xamarin.com | 2011 | San Francisco, United States | $82.25M | 254 | Cross-platform application development tools are provided by Xamarin. | |
| progress.com | 1981 | Bedford, United States | – | 450 | IDE-based software is provided for application development and management. | |
| azul.com | 2002 | San Francisco, United States | $122.23M | 29 | IDE based app development platform | |
| posit.co | 2009 | Boston, United States | $166.49M | – | Open-source data science tools are developed for teams and enterprises. | |
| qt.io | 1995 | Helsinki, Finland | $6.7M | 21 | Cross-platform user interface and application development for desktop and embedded platforms | |
| release.com | 2019 | San Francisco, United States | $22.85M | – | IDE-based cloud application development and automation solutions are offered. | |
| tobesoft.com | 2000 | Seoul, South Korea | $1.5M | – | Enterprise UX/UI development environments are provided for business applications. |
Detailed competitors of Bun
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Web traffic of Bun
The website of Bun (bun.sh) receives about 141.4K visits a month and ranks #323,867 among all websites worldwide, #7,646 in Programming and Developer Software.
- Monthly visits141.4K
- Unique visitors70.7K
per month
- Global rank#323,867
among all websites
- Category rank#7,646
Computers Electronics and Technology · Programming and Developer Software
- Bounce rate57%
- Pages per visit1.6
- Average visit46 sec
- DevicesDesktop 69% · Mobile 31%
Websites whose visitors overlap most with Bun. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
| github.com | 100% | 542.6M | #65 | View details | |
| stackoverflow.com | 94% | 45.7M | #1,565 | View details | |
nodejs.org | nodejs.org | 89% | – | #14,480 | – |
| vercel.com | 88% | 16.9M | #2,507 | View details | |
| elysiajs.com | 84% | 182.7K | #167,874 | View details | |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
All 27 similar websites and full traffic analytics for Bun
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- 27 similar websites
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Top companies in Application Development Tools
10 companies that operate in the same segment as Bun (Application Development Tools), ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
Cloud based version control and source code management platform | 2008 | San Francisco, California, United States | USD 354.03 M | – | – | |
Cloud-based software for continuous application development and deployment. | 2013 | San Francisco, California, United States | USD 202.25 M | – | – | |
Cloud based website development platform | 2012 | San Francisco, California, United States | USD 336.41 M | – | – | |
Cloud-based website builder tool | 2003 | New York, New York, United States | USD 591.5 M | USD 16.79 M | 87 | |
Cloud-based low-code platform enables application development and automation. | 1999 | Reston, Virginia, United States | USD 47.5 M | USD 726.94 M | 2,029 | |
SaaS-based collaborative commerce solutions are provided for brands and retailers. | 2000 | New York, New York, United States | USD 365 M | USD 240.52 M | 1,370 | |
Cloud and AI based low code workflow and app development platform | 2013 | San Francisco, California, United States | USD 1.35 B | – | – | |
Websites are built using Wix's cloud-based drag-and-drop platform. | 2006 | Tel Aviv, Israel | USD 53.5 M | USD 1.99 B | 5,280 | |
Online application marketplace | 2009 | San Francisco, California, United States | USD 437.8 M | USD 7.59 M | 183 | |
Development of internal tools is enabled by a low-code platform. | 2017 | San Francisco, California, United States | USD 135.27 M | – | 124 |
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Related news about Bun
Complete news archive for Bun
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Frequently Asked Questions about Bun
Bun was founded in 2019 and raised its 1st funding round 3 years after it was founded.
Bun is headquartered in San Francisco, United States. It is registered at San Francisco, California, United States.
Jarred Sumner is the current CEO of Bun. They have also founded this company.
Bun is a funded company, having raised a total of $7M across 1 funding round to date. The company's 1st funding round was a Seed of $7M, raised on Aug 2022.
Bun was founded in 2019 in San Francisco, United States, as an IDE-based toolkit for JavaScript and TypeScript application development. Runtime, bundler, test runner, and package manager functionalities are integrated to facilitate project development, testing, bundling, and execution. APIs are provided for common development tasks within the software sector. Operations are centered in the United States.
Bun's top competitors include Posit, Azul Systems and Xamarin.
Bun has 3 investors. Key investors include Anthropic, Kleiner Perkins, and Johannes Schickling.
Yes. Bun was acquired by Anthropic in December 2025.
The website of Bun receives about 141 thousand visits a month and ranks #323,867 among all websites worldwide.