Capacity

Capacity is a no-code AI app builder created in late 2024 by a two-person founding team. Users describe their app idea in plain language, and Capacity's AI agent asks clarifying questions before generating a working fullstack application — complete with authentication, databases, and payment support. The platform targets non-technical builders who want to ship real products without writing or seeing any code.

What It Is

Capacity sits in the vibe-coding and no-code app-builder category. Rather than generating static templates, it runs an agentic build process: the AI asks what the app is for, who will use it, and how it should feel, then constructs a deployable fullstack app. The result includes member accounts, saved data, and payment flows — features the team describes as "everything real products have." Apps can be published with one click and connected to a custom domain.

How the Build Workflow Works

The workflow has three stages: describe, refine, and deploy.

• Describe — Users type their idea in natural language; no technical vocabulary is required.
• Refine — The AI asks targeted questions about purpose, audience, and style before building, reducing guesswork.
• Deploy — A single click publishes the app to a shareable URL; custom domains can be connected in minutes.

If something breaks or looks wrong, users describe the problem in plain words and the AI co-founder diagnoses and fixes it automatically.

Platform and Desktop Access

Capacity runs as a web app and also offers a dedicated macOS desktop application called Capacity Desktop, introduced alongside the Capacity 3.0 release. The desktop app requires no credit card to download and is positioned as the primary entry point for Mac users. The platform generates apps that are responsive across phones, tablets, and computers by default.

Use Cases and App Categories

The platform supports a wide range of project types, organized into categories on the use-cases page:

• Websites, portfolios, and landing pages
• E-commerce stores and booking systems
• B2B SaaS products and internal tools
• Consumer apps, games, and clones of popular platforms
• Personal sites including wedding pages, musician sites, and restaurant pages
• Next.js template generation with App Router, Tailwind CSS, authentication, and database scaffolding

Credit-Based Billing Model

Capacity uses a credit system for all paid plans. Credits are consumed per AI agent message, with usage varying by task complexity — simple requests use fewer credits, complex operations like feature builds or debugging use more. The team states that credits never expire. One-time credit top-up packs are available alongside monthly subscriptions, allowing users to add credits without changing their plan tier.

Update: Capacity 3.0 and Desktop Launch

The homepage announces Capacity 3.0 as the current major release, paired with the launch of Capacity Desktop for macOS. The changelog is maintained at docs.capacity.so, and a public roadmap is hosted on Featurebase. The Product Hunt badge on the homepage references "Spec Coding by Capacity," a planning-assistant feature that adds structured specification steps to the vibe-coding workflow — positioning Capacity as a more deliberate alternative to purely prompt-driven builders.