Developer tools

Ultralight

Website
Founded 2017Origin source ↗Checked 2026-09-15

Overview

Ultralight is a GPU-accelerated toolkit to embed modern HTML in games and native apps.

Available for C and C++ on Windows, macOS, Linux, Xbox, PlayStation, ARM64 devices, and more.

Developed in collaboration with leading game studios, built GPU-first on a new, lightweight fork of WebKit.

Company description As recorded 2026-11-08
GitHub
Developer toolsInfrastructureDevelopersDevelopersLicensing

Founders & team

Adam Simmons

Founder/CEO

Founder of Ultralight. 15 years experience building dev tools for games and desktop apps. Graphics researcher. OSS advocate. C++, GPU, UI, WebKit expert.

LinkedIn X
Founder profile As recorded 2026-09-15
1team members reported
Source-reported As recorded 2026-09-15

Founded 2017 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthenriched profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedSan Francisco, CA, USA
Pricing evidenceA pricing page was detected
Maturity: Not assessed · 4 of 6 areas documented

Source-based assessment · automated evidence rules

The homepage contains prelaunch or closure language; availability needs review.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationreachable websitedescriptive evidenceclassified market and modelsourced peoplesourced founding yearpricing page observeddocumentation observedrecent publishing observed
startup.observe Directory coverage · Sources & method