Capacity
Capacity is a credit‑based AI development tool that turns plain‑language ideas into full‑stack web applications, positioning itself as an “AI cofounder” for founders, indie hackers, and product teams. It focuses on specification‑driven development through its Spec Coding workflow, where users define a project brief, UX, and design requirements before the AI generates production‑ready code. The platform produces modern web apps using technologies such as Next.js, React, TypeScript, Tailwind CSS, and Supabase, and supports both quick “vibe coding” experiments and more rigorous production builds.
Make a decision about Capacity
- Already use it? Add Capacity to Stack Autopsy — check cost, overlap and safe cancellations.
- Thinking about buying it? Ask AI Advisor — compare fit, alternatives and trade-offs.
- Want to leave it? Find a replacement — see feature losses and migration risks.
Pricing
- Starter: $25 per month; includes 100 credits, unlimited projects, full Agentic mode access, and email support.
- Growth: $69 per month; includes 250 credits, full codebase export, custom domains, and a dedicated WhatsApp support channel.
- Professional: $129 per month; includes 500 credits, all Growth features, premium support, and early access to new features.
- Business: $299 per month; includes 1,000 credits, all Professional features, a dedicated success manager, and custom integrations.
- Mini Pack: $9 one-time; includes 20 credits, one small project build and test, and full Agentic mode access.
Features
- Spec Coding methodology: Structured, specification‑first flow (brief, UX, design) so AI generates code that follows clearly defined requirements instead of guessing from vague prompts.
- AI Cofounder workspace: An AI “cofounder” that helps brainstorm ideas, refine concepts, and translate them into scoped features and coding tasks, keeping product vision and implementation aligned.
- True agentic coding: Project‑aware AI agents that understand the codebase, support multi‑file refactors with dependency tracking, and automatically fix many errors and bugs across files.
- Full‑stack generation: Builds database‑backed apps with auth, storage, and real‑time updates on top of Supabase, along with frontend and backend code in a production‑ready stack.
- Credit‑based workflow: Every interaction with the AI uses credits based on task complexity, which lets users scale usage from quick tests to large projects without changing tools.
- Code export and hosting: Users can export the entire codebase, connect GitHub, and still rely on Capacity’s managed hosting when they do not want to run infrastructure themselves.
Use cases
- Solo founders and indie hackers: Validating SaaS or marketplace ideas quickly without hiring developers.
- Startup product teams: Spiking features, building internal tools, and iterating on product experiments.
- Agencies and studios: Producing client MVPs, dashboards, and custom CRMs faster while still delivering exportable code.
- Internal ops and IT teams: Spinning up internal portals, booking tools, or inventory systems on top of existing data.
- Uncommon Use Cases: Educators using it to demonstrate full‑stack architecture with AI assistance; content creators building niche AI tools like SEO writers or AI support chat widgets as side products.