01 · Agents
Bring any agent
Claude Code, OpenAI, Anthropic, or a local model. One panel, the same permission modes everywhere, and every agent gets Horizon's own tools.
- Claude Code
- OpenAI
- Anthropic
- Ollama
- LM Studio
- llama.cpp
BETACommercial licenses now available
Horizon C# and TypeScript IDE
See the possibilities
Bring any AI agent you like, from Claude Code and OpenAI to local models.
Free for non-commercial use · Windows, macOS, Linux
02 · Your stack
C# and TypeScript, both first-class
Roslyn for your .NET backend, language servers for your frontend. Refactors, navigation and tests on both sides.
- C#
- TypeScript
- React
- Vue
- Angular
- Svelte
03 · Tools
Tools we rethought
Drag-and-drop interactive rebase, merge conflicts resolved in the editor, and a source generator inspector.
And everything you'd expect:
- .NET debugger
- Test runner
- Git
- GPU terminal
- Hot reload
- Profiling
- Windows, macOS, Linux
Pricing
Free to learn. One license for work.
Community
Free
- Learning, personal projects, and unpaid open source work
- Every feature included
- Anonymous usage telemetry, crash reports, and error reports are part of the license
- No account or license key needed
Commercial
$99/year
or $15 per month
- Commercial use, licensed per developer
- Usage telemetry, crash reports, and error reports off by default
- Keep every version released during an annual subscription
- Buy here or from inside Horizon
Teams
Contact us
- Per-seat licensing for teams and companies
- Quarterly, semi-annual, or custom billing terms
- The same commercial rights and privacy defaults
Download
Download Horizon
FAQ
Frequently asked questions
What is Horizon?
Horizon is a cross-platform IDE for C# and TypeScript, built with Blazor and Hermes. It pairs Roslyn-powered C# tooling and language servers for TypeScript, JavaScript, React, Vue, Angular and Svelte with an agent panel that runs Claude Code, OpenAI, Anthropic, or a local model.
Is Horizon free?
Horizon is free for non-commercial use under the Community license, which sends anonymous usage telemetry, crash reports, and error reports. Commercial use requires a license, at $99 per year or $15 per month, and turns those off by default. See pricing and the Terms of Service for the details.
What platforms does Horizon support?
Horizon is available as a native desktop application for Windows 10+, macOS 12+, and Linux. Built with Hermes for native desktop performance with signed and notarized executables.
How does the AI integration work?
Horizon's agent panel runs Claude Code, OpenAI and Anthropic models, or a local model served by Ollama, LM Studio or llama.cpp. Every provider gets the same panel, the same permission modes, and Horizon's own tools, which give the agent Roslyn's understanding of your code: types, references and diagnostics, not just text in files.
What languages does Horizon support?
C# and Razor through Roslyn, and TypeScript and JavaScript through language servers, including React, Vue, Angular and Svelte projects. NuGet and npm packages, and xUnit, NUnit, MSTest and Vitest tests, work side by side. The editor also highlights JSON, HTML, CSS, and more.
When will the full release be available?
Horizon is currently in public beta. We're actively developing new features and refining the experience based on user feedback. Download the beta today and be part of shaping the product.
Ready to see the possibilities?
Join the public beta: free for non-commercial use, one license for commercial work.