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Bubble vs Kastro
Bubble builds full web apps without AI-trained documentation support.
Which to pick
Pick Bubble if you want…
- Full-stack no-code app builder
Pick Kastro if you want…
- ChatGPT-trained docs chatbot
Side by side
- What it is
- Bubble:Bubble is an AI-powered no-code platform to design, build, and launch full-stack web and native mobile apps.
- Kastro:Kastro lets you train ChatGPT on your technical documentation to create an interactive chatbot for your website.
- Best for
- Bubble:Full-stack no-code app builder
- Kastro:ChatGPT-trained docs chatbot
- Who it’s for
- Bubble:Founders, agencies, freelancers and developers who need to create apps without writing code.
- Kastro:Product teams and developers who want AI-powered docs support.
- Pricing
- Bubble:Freemium
- Kastro:Contact sales
- Plans
- Bubble:Free $0 · Starter $59 per month (billed annually) · Growth $209 per month (billed annually) · Team $549 per month (billed annually)
- Kastro:—
- Works with
- Bubble:Stripe, Google Maps, API connector
- Kastro:—
Bubble features
- AI-assisted design. Generate professional UI designs from prompts or choose from thousands of templates.
- Visual data modeling. Create and manage databases, connect to services like Stripe and Google Maps without code.
- Logic & workflow automation. Build app behavior with drag-and-drop workflows and smart AI suggestions.
- Native mobile support. Publish iOS and Android apps using Bubble’s React Native based mobile editor.
- Built-in hosting & security. Enterprise-grade hosting, automatic scaling, security scanning and privacy rules.
- Collaboration tools. Version control, multi-editor support and team branches for collaborative development.
Kastro features
- Doc-based training. Upload or link technical docs so the model learns your content.
- Interactive chatbot. Provides instant answers to visitor questions on your site.
- Code snippet retrieval. Returns relevant code examples from your documentation.
- Website embed. Easily add the chatbot widget to any web page.
Bubble vs Kastro FAQ
Is Bubble or Kastro free?+
Bubble has a free plan; paid plans start at $59/month (Starter).
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.