Open-source tools for the modern web. Our flagship is Solara Browser — a minimal, privacy-first Android browser built from the ground up.
We are building a complete browser stack from scratch. No Chromium. No system WebView. No compromises.
- Solara — the flagship Android browser. Kotlin, Jetpack Compose, Material 3.
- Solaria — the same experience for older devices. Java, Views, API 21+.
- Optima — the rendering engine. Rust. HTML, CSS, DOM, layout, paint.
- Solarium — the Runtime engine. Zig. Written from scratch.
- Solarian — search provider API. Kotlin.
Plus the surrounding ecosystem — website, docs, extensions, mods.
| Repository | Purpose | Language | License |
|---|---|---|---|
Solara |
Flagship Android browser (API 24+) | Kotlin + Compose | MPL-2.0 |
Solaria |
Android browser for older devices (API 21+) | Java + Views | MPL-2.0 |
Optima |
Rendering engine | Rust | MIT OR Apache-2.0 |
Solarium |
Runtime engine | Zig | MPL-2.0 |
Solarian |
Search provider API | Kotlin | MPL-2.0 |
web |
Official website | HTML + CSS + JS | MPL-2.0 |
docs |
Documentation | Markdown | MPL-2.0 |
extension |
Extension system SDK | TypeScript | MPL-2.0 |
mod |
Mods marketplace | CSS + JSON | MPL-2.0 |
- Privacy by default. No telemetry. No tracking. No accounts required.
- Performance first. Rust and Zig engines. Small binary size. Fast startup.
- Own the stack. We build our own rendering and JavaScript engines — no Chromium, no WebView.
- Quiet, beautiful UI. Material You, glass-morphism, no clutter.
- Accessible to all. Support for older devices. No forced obsolescence.
| Layer | Technology |
|---|---|
| UI | Jetpack Compose + Material 3 |
| App | Kotlin, Java |
| Rendering | WebVeiw - Rust |
| JavaScript | Runtime - Zig |
| Extensions | TypeScript |
| Search API | Kotlin |
| Build | Gradle (Kotlin DSL), Cargo, Zig |
| CI/CD | GitHub Actions |
| Hosting | GitHub Pages |
git clone https://github.com/SolaraStudio/Solara.git
cd Solara/android
./gradlew assembleReleaseBuild the rendering engine:
git clone https://github.com/SolaraStudio/Optima.git
cd Optima
cargo build --releaseBuild the JavaScript runtime:
git clone https://github.com/SolaraStudio/Solarium.git
cd Solarium
zig buildSolara is Under Development. Optima already renders static HTML and CSS; Solarium (Runtime) is under construction.
Progress is tracked in each repository's issues and milestones. Roadmaps are posted in the individual repos.
We welcome contributions of any size. Each repository has its own CONTRIBUTING.md, but the process is the same everywhere:
- Fork the repository.
- Create a feature branch.
- Make your changes with tests.
- Open a pull request.
For larger changes, open an issue or discussion first so we can align on the approach before you write code.
- GitHub Discussions — questions, ideas, feedback
- GitHub Issues — bug reports and feature requests
- Website — coming soon
- Discord — coming soon
Most SolaraStudio repositories are licensed under the Mozilla Public License 2.0.