Capacity alternatives
6 coding tools in the same lane as Capacity, ranked by editorial score.
RA
Replit Agent
FeaturedCoding · Multi-model (Claude / GPT configurable)
8.7
Build & deploy a full app from a single prompt.
Freemium· Basic: $20 · Pro: $50 · Enterprise: Contact salesprototypesinternal tools
SN
Same.new
Coding · Undisclosed premium frontier models (paid tiers)
Prompt-first AI web app builder that turns a URL or description into a live, hosted full-stack app.
Freemium· Free (500K tokens/mo) / Basic $10/mo (2M tokens) / Pro $25/mo (5M tokens) / Max $50/mo (10M tokens) / Ultra $100/mo (20M tokens, $10 per additional 2M overage). Tokens do not roll over.Cloning a reference site's UI as a starting templatePrototyping SaaS onboarding flows
LO
Lovable
Coding · Undisclosed (multi-model)
8.2
Chat-driven app builder that turns natural-language prompts into deployable full-stack web apps.
Freemium· Free: Free · Pro: ? · Business: ?app-prototypingno-code-webapps
BN
Bolt.new
Coding · Automatic multi-model routing (Bolt Agent selects frontier models per task; Anthropic Claude family is the primary code generator, with additional models used for planning and edits)
Prompt, run, edit, and deploy full-stack web apps from a browser tab
Freemium· Free: $0 · Pro: $25 · Teams: $30 · Enterprise: CustomLanding page generationSaaS MVP prototyping
OP
OpenUI
Coding · Model-agnostic via LiteLLM: OpenAI GPT-4o/4.1, Anthropic Claude 3.5/3.7, Google Gemini, Groq, Cohere, Mistral, and local Ollama models (Llama, Qwen, etc.)
Describe a UI in natural language and see it rendered live in HTML, React, Svelte, or Web Components
Free· Free and open-source (Apache-2.0). Hosted demo at openui.fly.dev is free; self-hosting is free but you pay for whatever model API keys (OpenAI, Anthropic, Groq, Gemini, Cohere, Mistral) you plug in, or run local models via Ollama at zero token cost.AI-assisted UI prototypingGenerating React component scaffolds from prompts
GM
Generative MUI React
Coding · model-agnostic (any LLM emitting A2UI v0.9.1; examples use Google Gemini)
Render LLM-emitted A2UI as real Material UI components, with streaming, two-way binding, and charts.
Free· Free, MIT-licensed npm package. No paid tiers; you pay only for whatever LLM you wire it to (e.g. Gemini, OpenAI, Anthropic).LLM chat surfaces that render forms and cards instead of markdownAgent-driven dashboards with streamed MUI X Charts