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Testing and evaluation platform for voice and chat AI agents, running simulations, production monitoring and human QA review.
Google's open-source TypeScript framework for building scalable web apps, featuring signals, reactivity and first-party tooling.
Visual development platform with AI design-to-code, a visual editor and headless CMS so teams and agents ship UI in real code.
AI prototyping tool that generates UI matching your design system, letting product teams test features fast.
Side-by-side arena to compare AI coding models and build multi-file apps, with a public leaderboard and battle mode.
Free trial available
No public pricing
No public pricing
No public pricing
- ✦Voice agent simulation at scale
- ✦Production call monitoring and evals
- ✦Human QA review queues
- ✦Regression testing across changes
- ✦Vendor bake-off comparisons
- ✦API, CLI and MCP interfaces
- ✦Signals-based fine-grained reactivity
- ✦Built-in control flow and deferrable views
- ✦Server-side rendering and hydration
- ✦First-party routing, forms and dependency injection
- ✦AI-forward tooling and MCP resources
- ✦In-browser tutorials and playground
- ✦AI design-to-code (Figma to code)
- ✦Visual editor tied to your components
- ✦Headless/visual CMS
- ✦AI agents (Builder-Agent) that open PRs
- ✦Integrations: GitHub, GitLab, Bitbucket, Figma, VS Code
- ✦Roles, reviews and collaboration
- ✦AI UI generation from prompts
- ✦Match existing styling and design systems
- ✦Rapid, high-fidelity prototyping
- ✦Live team editing and sharing
- ✦Enterprise security and compliance
- ✦Head-to-head model comparison
- ✦Battle mode matchups
- ✦Public model leaderboard
- ✦Multi-file app generation
- ✦File uploads as input
- →Pressure-testing voice agents before launch
- →Catching quality drift in production
- →Comparing voice AI vendors objectively
- →Building scalable single-page apps
- →Enterprise web application development
- →Performance-critical front ends
- →Learning modern web development
- →Convert designs to production code
- →Let non-developers edit pages visually
- →Manage content with a headless CMS
- →Collaborate across design, PM and engineering
- →Prototype new product features
- →Test designs with customers
- →Build design-system-consistent mockups
- →Choosing the best coding model
- →Benchmarking AI code quality
- →Prototyping small apps