Horizon – GPU-accelerated infinite-canvas terminal in Rust
Tabs, splits, and tmux work fine until you have several projects open with logs, tests, and long-running shells. I kept rebuilding context instead of resuming work. Horizon puts shells on an infinite canvas. You can arrange them into workspaces and reopen later with layout, scrollback, and history intact.Built in 3 days with Claude/Codex, dogfooding the workflow as I went. Feedback and contributions welcome.
FL score
out of 100
Verdict
high confidence
Competition
9
competitors found, emerging market, funded players
Trend
No signal yet
A GPU-accelerated infinite-canvas terminal targeting developer context switching pain, but faces high build complexity and market competition.
The pain
The gap
Build angle
Strengths
- Addresses a real, severe, and specific pain point for developers (context switching).
- Unique value proposition: GPU-accelerated infinite canvas with persistent workspace context.
- Clear addressable complaints against existing tools (resource use, missing features, config complexity).
- Growing market for developer productivity tools and infinite canvas metaphors.
- Built with Rust and GPU acceleration promises strong performance, addressing a key pain point.
Risks
- Extremely crowded market with many high-quality, free, open-source competitors (iTerm2, Alacritty, Kitty, Zellij).
- High technical complexity and build time for a solo developer to create a performant, cross-platform terminal.
- Monetization challenge: convincing developers to pay for a terminal client when excellent free options exist.
- User inertia: developers are highly resistant to switching core tools like their terminal.
- Funded competitors like Warp are also innovating with modern terminal experiences and AI integration.
Next steps
- Conduct in-depth user interviews with 'power terminal users' (e.g., DevOps engineers, full-stack devs) to further validate the exact pain points and preferred solutions.
- Build a focused MVP with the 'narrowest wedge' (e.g., persistent infinite canvas for 1-2 projects, minimal features) and get it into early users' hands ASAP.
- Test willingness to pay with explicit pricing questions early on, even for an incomplete product.
- Explore niche distribution channels and communities where this specific problem is most acute.
- Investigate modularity to potentially offer specific components (e.g., the canvas engine) as libraries or separate tools to de-risk the full terminal build.
Fly Labs Method
Is the pain real, is there a gap, is it the right time, can one person build it.
- Problem clarity
- 26
- Solution gap
- 20
- Willingness to pay
- 19
- Buildability
- 11
A high-potential idea solving a clear, severe developer pain point with a unique approach to terminal management, but faces significant competition and build complexity.
Value Equation
Dream outcome and how likely it feels, against the time and effort it costs.
A viable market with clear pain and a compelling value proposition, but differentiation and monetization in a crowded, often free market pose significant challenges.
One-Person Business
Curiosity pull, identity fit, and a path from free value to paid for a solo creator.
A clear problem for a specific niche, but faces significant build complexity and monetization challenges in a crowded market.
Viral Frameworks
Hook strength, shareability, and how cheaply it can be tested.
A clear value proposition for a specific audience, but faces distribution challenges and business model risks in a competitive market.
Builder Lens
Evidence the problem exists, timing, defensibility, and a model that fits on a napkin.
Addresses a real, specific pain for developers, with a clear initial offering and growing future relevance, but needs to prove its unique approach can overcome deeply ingrained habits.
Why this verdict
Five lenses, one composite. How scoring works
The angle
This weekend
- Conduct in-depth user interviews with 'power terminal users' (e.g., DevOps engineers, full-stack devs) to further validate the exact pain points and preferred solutions.
- Build a focused MVP with the 'narrowest wedge' (e.g., persistent infinite canvas for 1-2 projects, minimal features) and get it into early users' hands ASAP.
- Test willingness to pay with explicit pricing questions early on, even for an incomplete product.
- Explore niche distribution channels and communities where this specific problem is most acute.
- Investigate modularity to potentially offer specific components (e.g., the canvas engine) as libraries or separate tools to de-risk the full terminal build.
Who is already there, emerging market
- iTerm2Visit
A feature-rich terminal emulator for macOS that enhances the command-line experience with advanced functionalities.
Pricing: Free and open-source.
A modern, Rust-based terminal with AI built-in for seamless collaboration and extensive customization.
Pricing: Undisclosed, but offers an AI-powered cloud-native terminal solution.
- AlacrittyVisit
A blazing fast, GPU-accelerated terminal emulator written in Rust that focuses on performance and simplicity.
Pricing: Free and open-source.
- KittyVisit
A cross-platform, fast, feature-full, GPU-based terminal emulator designed with keyboard-centric use in mind.
Pricing: Free and open-source.
- WezTermVisit
A GPU-accelerated cross-platform terminal emulator and multiplexer written in Rust, highly programmable with Lua.
Pricing: Free and open-source.
- ZellijVisit
A terminal workspace and multiplexer built in Rust, aiming to be a modern and more intuitive alternative to tmux with good defaults.
Pricing: Free and open-source.
- GhosttyVisit
A cross-platform terminal emulator balancing speed, platform-native UI, and modern features, using GPU acceleration.
Pricing: Free and open-source.
- Blink ShellVisit
A professional, desktop-grade terminal emulator for iOS and iPadOS with Mosh & SSH clients and local UNIX tools.
Pricing: $19.99/year (subscription), previously offered a one-time purchase option.
- tmuxVisit
A terminal multiplexer that enables multiple terminals to be created, accessed, and controlled from a single screen.
Pricing: Free and open-source.
What they charge
Recent news
tldraw raises $10M to build the infinite canvas for developers
tldraw.com, April 09 2025
Choosing a Terminal on macOS (2025): iTerm2 vs Ghostty vs WezTerm vs kitty vs Alacritty
Medium, September 20 2025
Blink Shell Alternatives in 2026: What to Use After the Subscription Switch
Moshi, January 20 2026
Warp vs. Ghostty: Which Terminal App Meets Your Dev Needs?
The New Stack, January 25 2025
Modern Terminal Emulators: Ghostty vs iTerm2
Medium, February 01 2025
Market signals
The market for developer tools, particularly terminal emulators and infinite canvas solutions, is growing. Recent funding rounds, such as tldraw's $10M Series A and an additional $2M, indicate investor interest in tools that enhance developer productivity and collaboration, especially those leveraging an 'infinite canvas' metaphor. The rise of AI coding agents is also driving innovation in developer tools, with some terminals integrating AI directly.
What frustrates people
- iTerm2 can be resource-intensive with many panes.
- Alacritty lacks native tab and split pane support and its documentation is not comprehensive.
- Kitty's developer has a stated aversion to terminal multiplexers, which some users see as a limitation.
- WezTerm's reliance on Lua for configuration can be a hurdle for non-Lua users.
- Zellij users have reported noticeable latency and a lack of keyboard-driven copy/paste.
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