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Watermelon

Open-source library of ready-made web UI components for developers and designers, with a mobile component kit launching soon.

Actively maintained

Developer toolsOpen sourceFor developers
watermelon.sh ↗
Open watermelon.shAlternativesSet it up for my team
Watermelon: data, price, alternatives
At a glancechecked Oct 22, 2026

≈ 52visits/mo

Little sign of use · estimate, read Oct 13, 2026

For
Early-stage startups that need product design, UI components, or a design system while they build fast.
Activity
Actively maintainedsite updated 11 days ago
Used for
  • Hire a design partner for product design and UX audits
  • Install open-source UI components into a web or mobile app
  • Build a consistent design system as the product grows
Worth knowingcomputed from what we read · each with its source
The companyeach fact with its source · read Oct 19, 2026
How a program reaches itfound, not claimed · read Oct 19, 2026
  • MCP serversh.watermelon/uiverified in the MCP registry
  • Stateanswers, 8 toolschecked 2026-10-19
  • Address to connectmcp.watermelon.sh/mcp

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Developer toolsby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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Questions this page answers
  • What is Watermelon?

    Open-source library of ready-made web UI components for developers and designers, with a mobile component kit launching soon. It is listed in the Atlas under Developer tools.

  • Who is Watermelon for?

    Early-stage startups that need product design, UI components, or a design system while they build fast.

  • Do people use Watermelon?

    Little sign of use: ≈ 52 visits/mo · estimate, 2026-10.

  • Is Watermelon still maintained?

    Actively maintained: site updated 11 days ago.

  • What are alternatives to Watermelon?

    In Developer tools, by use: Progress Telerik, Cypress, Once UI, zeroheight, Carbon Design System.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk