Comparison
Frontman vs v0
Edit Your Real App vs Generate New UI
Frontman and v0 both use AI to help with frontend development, but they do fundamentally different things. v0 generates new UI from text prompts in a sandboxed environment. Frontman edits your existing codebase by interacting with your running app in the browser.
Frontman is an open-source AI coding agent that hooks into your dev server as framework middleware (Next.js, Astro, Vite). It sees the live DOM, component tree, computed CSS, and server-side context. You click elements in your running app, describe changes in plain English, and Frontman edits the actual source files with hot reload. Free and unlimited — you bring your own API keys.
v0 is Vercel's AI-powered UI generation tool. You describe what you want — or import a Figma design — and v0 generates a working app with React, Next.js, Tailwind, and shadcn/ui. It includes a visual Design Mode for clicking and editing generated output, GitHub sync, and one-click Vercel deploy. Credit-based pricing starting at $0/month (7 messages/day).
The core difference: v0 creates new things. Frontman changes existing things. Use v0 to prototype, use Frontman to iterate on your real app.
Feature Comparison
| Feature | Frontman | v0 |
|---|---|---|
| Edits your real codebase | Edits actual source files in your project | Generates code in a sandboxed environment |
| Sees live DOM & styles | Browser-side MCP server inspects your running app | Sees its own sandbox preview, not your app |
| Click-to-select elements | In your running app | In the sandbox preview (Design Mode) |
| Works with existing projects | Designed for existing codebases | Can import repos via GitHub sync, but primary workflow is new generation |
| Hot reload feedback loop | Instant via your framework's HMR | Instant in sandbox preview |
| Generate UI from scratch | | Core workflow: prompt to full UI |
| Deploy to production | | One-click deploy to Vercel |
| Figma import | | Import Figma designs and convert to code |
| Framework-aware middleware | Hooks into Next.js, Astro, Vite runtime | Generates framework code but doesn't integrate into your dev server |
| Server-side context | Routes, server logs, query timing | Client-side sandbox only |
| Component tree access | React fiber, Vue reactivity, Svelte tree | Generates components, doesn't inspect your existing tree |
| Computed CSS inspection | Runtime values from your real app | CSS in generated output only |
| Designer/PM friendly | No IDE needed — works in your browser | No IDE needed — works in v0.dev |
| Open source | Apache 2.0 (client) / AGPL-3.0 (server) | Proprietary SaaS |
| BYOK (bring your own key) | Any LLM provider | Uses Vercel's own models (v0 Mini, Pro, Max) |
| Self-hostable | Everything runs locally | Cloud service only |
| Works offline (with local LLM) | BYOK includes local models via OpenRouter | Requires internet |
Edits your real codebase
Sees live DOM & styles
Click-to-select elements
Works with existing projects
Hot reload feedback loop
Generate UI from scratch
Deploy to production
Figma import
Framework-aware middleware
Server-side context
Component tree access
Computed CSS inspection
Designer/PM friendly
Open source
BYOK (bring your own key)
Self-hostable
Works offline (with local LLM)
What v0 Does Well
v0 is the fastest way to go from an idea to a working frontend. It has earned its place as the leading generative UI tool.
Prompt-to-UI is magical. Describe what you want in plain English — "a dashboard with a sidebar, dark mode, and a chart showing monthly revenue" — and v0 generates a complete, working React app. For prototyping and starting new projects, nothing is faster.
Design Mode adds visual editing. v0's Design Mode lets you click elements in the generated preview and make visual changes. This is genuine click-to-edit functionality within the v0 sandbox. Frontman offers similar click-to-edit but for your actual running app, not a sandbox.
Figma-to-code. Import Figma designs and v0 generates working code that matches them. This bridges the designer-developer gap for new projects. Frontman doesn't have Figma import.
One-click deploy. Generated apps deploy to Vercel instantly. From idea to production URL in minutes. Frontman is a development tool, not a deployment platform.
GitHub sync. v0 can sync with your GitHub repository, allowing generated code to flow into your existing project. This partially addresses the "sandbox vs real codebase" gap.
Custom models. v0 runs its own model variants (v0 Mini, Pro, Max) optimized for UI generation. These are purpose-built for frontend code and outperform general-purpose models at that specific task.
Where Frontman Is Different
Frontman and v0 look superficially similar — both involve AI and clicking things in a browser. But they solve opposite problems. v0 generates new UI. Frontman edits existing UI.
Your real codebase, not a sandbox. When you use Frontman, you're editing the actual source files in your project. The AI sees your real component tree, your real CSS, your real routing, your real server state. Changes show up via hot module replacement in your actual dev server. With v0, you're working in a sandboxed environment that generates fresh code — which then needs to be integrated into your real project.
Framework middleware integration. Frontman installs as a plugin into your dev server — @frontman-ai/nextjs, @frontman-ai/astro, or @frontman-ai/vite. This gives it access to your component tree at the framework level (React fiber nodes, Vue reactivity, Svelte components), computed CSS from your actual stylesheets, server-side routes and logs, and source map resolution to find the exact file and line for any rendered element.
Context that a sandbox can't have. v0's sandbox doesn't know about your design system, your existing component library, your server endpoints, or your real responsive behavior at different viewports. Frontman sees all of this because it's running inside your actual app. When you ask "make this card match the other cards on the page," Frontman can inspect the other cards' actual styles.
Open source and BYOK. v0 is a proprietary SaaS with credit-based pricing. Frontman's client libraries are Apache 2.0 and the server is AGPL-3.0. You bring your own API keys — Claude, ChatGPT, OpenRouter, or any OpenAI-compatible API including local models. No credits, no message limits, no monthly fees from Frontman.
Works with any component library. v0 is optimized for shadcn/ui and Tailwind. Frontman is component-library agnostic — it sees whatever your app actually renders, whether that's MUI, Chakra, Radix, custom components, or plain CSS. The browser doesn't care what library generated the DOM.
Who Should Use v0
v0 is the better choice when you're creating something new from scratch:
- Rapid prototyping — turning ideas or requirements into working UI as fast as possible
- Starting new projects — generating a complete app scaffold from a description
- Figma-to-code workflows — converting designs into working React components
- Non-developers building apps — product managers, designers, and founders who need working code without writing it
- Quick deploys — need a working URL to share with stakeholders immediately
- shadcn/ui and Tailwind projects — v0 is optimized for this stack
Who Should Use Frontman
Frontman is the better choice when you're working on an existing codebase:
- Iterating on existing UI — adjusting styles, fixing responsive issues, refining layout on a real app
- Frontend developers on established projects — your app already exists and you need to edit it with AI that understands the context
- Teams where designers make UI changes — click elements in the running app, describe changes, review code diffs
- Any component library or CSS approach — MUI, Chakra, Tailwind, CSS Modules, styled-components — Frontman sees what renders, not what you typed
- Open source and vendor-independent — no cloud dependency, no credit system, BYOK, self-hostable
- Server-side context matters — routes, server logs, and server-side state alongside visual editing
A natural workflow: use v0 to generate initial UI, bring it into your project, then use Frontman to iterate and refine visually with full browser context.
Pricing Comparison
Frontman
Open source, BYOK
- Unlimited usage, no caps or credits
- Bring your own API keys (Claude, ChatGPT, OpenRouter)
- Or sign in with Claude/ChatGPT subscription via OAuth
- Apache 2.0 (client) / AGPL-3.0 (server)
- You pay your LLM provider directly
v0
Credit-based, proprietary
- Free: $5 credits/month, 7 messages/day
- Premium: $20/month, $20 credits + $2 daily bonus
- Team: $30/user/month, shared credits
- Business: $100/user/month, training opt-out
- Additional credits purchasable on-demand
Frequently Asked Questions
Is Frontman an open-source alternative to v0?
They solve different problems. v0 (v0.dev) is a generative UI tool — you describe what you want, it builds new UI in a sandbox, and you deploy it. Frontman (frontman.sh) is an AI coding agent for editing existing codebases — you click elements in your running app, describe changes, and it edits the actual source files. Frontman is open-source (Apache 2.0 client, AGPL-3.0 server) and free with BYOK. If you're starting from scratch, v0 is faster. If you're editing an existing app, Frontman is the right tool.
Can Frontman generate UI from scratch like v0?
No. Frontman is designed for editing existing codebases, not generating new projects from prompts. Its strength is visual editing: click an element in your running app, describe what you want changed, and the AI edits the source code with full browser context. If you need to generate a landing page or component from a text description, v0 is the better tool. If you need to modify your existing Next.js app's UI with AI that can see the rendered result, Frontman is the better tool.
Can I use v0 and Frontman together?
Yes, and this is a natural workflow. Use v0 to generate initial UI components or prototypes, then bring them into your real project. Once the code is in your codebase, use Frontman to iterate on it visually — clicking elements, adjusting styles, fixing responsive issues — with the AI seeing how your real app renders, not a sandbox preview.
What does Frontman see that v0 does not?
Frontman integrates with your framework (Next.js, Astro, Vite) as middleware and runs a browser-side MCP server. It sees your real app's live DOM, computed CSS, component tree with props and state, server-side routes and logs, and actual viewport behavior. v0 works in a sandboxed environment — it sees its own generated preview but has no access to your existing codebase's runtime, component tree, or server-side context.
Is Frontman really free compared to v0?
Yes. v0's free tier gives you $5 of credits per month with a 7-message daily limit. Premium is $20/month, Team is $30/user/month. Frontman is completely free to self-host — you bring your own API keys and pay your LLM provider directly. There are no message limits, no credit system, and no monthly subscription from Frontman itself.
Which tool is better for designers?
It depends on the workflow. v0 is better for generating new UI from descriptions or Figma imports — designers can describe what they want and get working code. Frontman is better for iterating on existing UI — designers can click elements in the running app and describe visual changes without opening an IDE. v0 creates; Frontman refines.
Try Frontman
One command. No account. No credit card. No prompt limits.
$ npx @frontman-ai/nextjs install Next.js $ npx @frontman-ai/vite install Vite (React, Vue, Svelte, SolidJS) $ astro add @frontman-ai/astro Astro