v0 review

v0 is Vercel's AI agent for building web apps. It writes Next.js, React, TypeScript, Tailwind CSS and shadcn/ui code, connects databases from the Vercel Marketplace and publishes to Vercel ^4,6,10. Vercel rebuilt v0 in February 2026 to work inside existing GitHub repositories, with branches, pull requests and deploy on merge ¹⁸.

Vercel was last valued at $9.3 billion after a $300 million Series F, and Forbes put its revenue run rate at $340 million by the end of February 2026 ¹⁹. In April 2026 Vercel disclosed a breach that started at a third-party AI tool used by an employee and exposed some customers' environment variables ^16,17.

You describe the app in chat or import a GitHub repository ⁵. v0 writes the code in a sandbox, runs shell commands, searches the web and opens the running app in a browser to test flows such as sign-up, fixing missing files, runtime errors and import problems on its own ³. Terminal commands and MCP tools follow Ask, Auto or Full permission modes ^3,8. Databases come from the Vercel Marketplace: adding Neon, Supabase or Upstash creates the account and sets the environment variables, and v0 can run SQL to create tables ⁴.

With GitHub connected, v0 commits each change to a working branch with its own preview deployment ⁵. Publish opens or reuses a pull request, merges it into the base branch and waits for the production deployment, and branch protection still applies ^5,6. The code viewer is read-only: you change code through chat or line comments, and you can ask v0 to revert a change or restore an earlier chat version and publish again ^6,9. Custom domains are added from the Publish menu once a deployment exists ⁷.

The free plan allows 7 messages a day and deploys to Vercel ^1,2. Plus costs $30 per user a month and includes $30 of credits plus $2 of daily credits on login; Business costs $100 per user a month with the same credits and training opt-out by default ¹. Credits pay for tokens at published rates, from $0.20 in and $1.20 out per million tokens on v0 Mini to $10 and $50 on v0 Max Fast ¹. Monthly credits roll over and expire after 65 days; extra credits can be bought and last a year ². The older $20 Premium plan is closed to new users ². A solo builder starts at $30 a month on Plus. Long sessions on larger models use credits faster, because each message counts the prompt, chat history and source files ^1,2.

v0 is included in Vercel's SOC 2 Type 2 attestation for security, confidentiality and availability ¹¹. Vercel holds ISO 27001, PCI DSS attestations and a TISAX assessment, and supports HIPAA for enterprise customers ¹⁵. Generated code runs in isolated environments and goes through a security analysis before it runs, and v0 warns about risky NEXT_PUBLIC_ variables ¹¹; Vercel does not publish a vulnerability scan of finished apps. v0 may use prompts and content to improve its products unless you opt out in Vercel settings; Business opts out by default, and Enterprise data is never used for training ^1,10. In April 2026 attackers reached Vercel's internal systems through a compromised third-party AI tool and decrypted some customers' environment variables that were not marked sensitive ^16,17.

v0's own G2 page shows 4.5 from 28 reviews ²⁰. Product Hunt shows 4.9 from 60 reviews; reviewers praise fast UI drafts and clean React and Tailwind code but call it better for prototypes than finished products ²¹. Trustpilot shows 1.9 from 30 reviews, mostly complaints about credits, billing and broken output, though Trustpilot notes the company has not invited reviews ²². v0 names no customers on its site ¹⁴. More than 4 million people used the original v0, by Vercel's count ¹⁸.