Bun Pitch Deck

Bun is a fast, all-in-one JavaScript toolkit created in 2019 by Jarred Sumner. Bun is meant to be a high-performance replacement for traditional tools like Node.js, npm, Jest, and Webpack by including runtime, package management, test execution, and native bundling in one binary. The company (incorporated as Oven Inc.) was accepted to the Y Combinator Summer 2019 (S19) batch, releasing initial previews over the next two years, followed by a public beta/v0.1.0 launch in July 2022.

Bun used this deck to raise a $7M seed round in August 2022 led by Kleiner Perkins (Bucky Moore), with participation from Guillermo Rauch, Y Combinator, and Johannes Schickling.

Shortly after passing 7.2 million monthly downloads by late 2025, Bun was acquired by Anthropic in December 2025 to support Claude Code and the agents SDK.

$7M • 2022 • Seed