So much has happened since October when we launched bolt.new at ViteConf 24. Bolt usage has been growing exponentially, and we’re just getting started. One of the keys to Bolt’s success has been the way the community has embraced it and helped share the product in its current form. We’re excited to see what the future holds for Bolt and the community that has grown around it.

StackBlitz built bolt.new and WebContainers on top of incredible Open Source projects. And Open Source maintainers who always spearheaded the adoption of our products. We sincerely appreciate the developers that are building the Open Source ecosystem we rely on. We’ve been committing resources to support Open Source projects and their maintainers as we grow.

After launching WebContainers, we saw the potential of Vite and heavily invested in it. I will soon complete my third year maintaining Vite thanks to StackBlitz. You can read about my journey on last year’s Open Source at StackBlitz blog post. We also expanded our Open Source team last year by hiring Ari Perkkio to work on Vitest. StackBlitz was also Volar’s main sponsor during 2023 and 2024 to help Johnson Chu make his vision for a framework agnostic language tool a reality.

Last year, StackBlitz joined the Open Source Pledge as an Innovator Member, an initiative led by Sentry for companies to pay their share back to Open Source projects. The 30 member companies have contributed $2.5M to Open Source maintainers over the last year.

In 2025, we’re doubling down on our support to Open Source. We’re thrilled to announce the Bolt 100K Open Source Fund.

This fund will be directed towards continuing to support web infrastructure projects and expanding to support libraries we rely on. We’re kick-starting the fund with the following contributions:

• Johnson Chu, Volar, $1K monthly
• Toyo Li, @toyobayashi, emnapi - $500 monthly
• Long Yinan, @Brooooooklyn, napi.rs - $500 monthly
• Anthony Fu, Vitest and Vite ecosystem, $512 monthly
• Vladimir Sheremet, Vitest, $512 monthly
• Pooya Parsa, unjs - $314 monthly
• James Garbutt, @43081j, e18e $250 monthly
• Divyansh Singh, @brc-dd, VitePress - $250 monthly
• Vjacheslaw @cyberalien, iconify - $250 monthly
• Fabian Hiller, Valibot - $250 monthly
• Marijn Haverbeke, CodeMirror - $500 monthly
• eslint team - $500 monthly
• unified, remark - $500 monthly
• Mock Service Worker - $500 monthly
• pnpm - $300 monthly

We’ll be announce other maintainers and projects we’ll be supporting during the year.

Open Source FTW

Apart from these contributions and hiring Open Source maintainers, we also maintain open source dev tools. pkg.pr.new, led by Mohammad Bagher Abiyat and AmirHossein Sakhravi, provides continuous releases for your GitHub projects. TutorialKit allows projects to create interactive tutorials that run in your browser. This project drew inspiration from several Open Source projects that use WebContainers, including the SvelteKit tutorial, angular.dev, and the Nuxt tutorial.

When we released https://bolt.new, we also open sourced a template to build AI and WebContainers applications. The Open Source community forked this project and built amazing features on top of it, like being able to run any MLM model. The biggest fork, bolt.diy, led by Cole Medin, moved to the StackBlitz GitHub org and recently crossed 12K GitHub stars, seeing massive momentum.

Join us and give back!

We’re excited to continue our Open Source Pledge commitment, and we encourage other companies to join us. We need to ensure that Open Source is sustainable. We need everyone to give back to keep enjoying the incredible Open Source ecosystem we have today.

Let’s keep building together!