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Side-by-side features, use cases and pricing — because the right pick depends on your job and budget, not just the ranking.
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Google Opal
✓ verifiedFree
Google Labs experiment for building and sharing AI mini-apps from natural-language prompts, no coding required.
2.1M visits/mo
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Builder.io
✓ verifiedFreemium
Visual development platform with AI design-to-code, a visual editor and headless CMS so teams and agents ship UI in real code.
806K visits/mo
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OnSpace.AI: App Builder AI No-code Platform
✓ verifiedFreemium
No-code AI builder that turns prompts into full-stack iOS, Android and web apps with a managed backend and Stripe payments.
394K visits/mo54K saves
Pricing
No public pricing
Free: $0 per user/mo (60 agent credits)
Pro: $24/user/mo (500 credits)
Team: $40/user/mo
Free: $0 (500 daily / 2,000 monthly credits)
Pro: $25/mo (up to 7,500 credits/mo)
Core features
- ✦Build AI mini-apps from natural-language prompts
- ✦Visual editor for prompt/tool workflows
- ✦Share created apps with others
- ✦No-code AI app prototyping
- ✦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 app builder for iOS, Android and web
- ✦Managed backend via Supabase (DB, auth, storage)
- ✦Built-in Stripe payment integration
- ✦Agent mode with usage-based pricing
- ✦Mobile creator app for building on the go
- ✦GitHub export and code editor
Use cases
- →Prototyping an AI workflow quickly
- →Sharing a custom AI mini-app
- →Automating a task with chained prompts
- →Convert designs to production code
- →Let non-developers edit pages visually
- →Manage content with a headless CMS
- →Collaborate across design, PM and engineering
- →Building an MVP without coding
- →Launching mobile apps quickly
- →Prototyping app ideas
- →Adding payments to a no-code app
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