Mantine

Mantine is a free, open-source React UI library that ships 120+ accessible components and 100+ hooks in a single MIT-licensed package. We rate it 92/100 — for any new React 19 project in 2026 where you want best-in-class developer experience without paying for an enterprise component suite, Mantine is the strongest all-around pick.

What is Mantine?

Mantine is a React component library originally built by Vitaly Rtishchev and first released on January 7, 2021. It has grown to 31,000+ GitHub stars and roughly 1.35 million weekly npm downloads by mid-2026 — up from around 900K just six months earlier. The current stable release is 9.1.1, published on April 27, 2026.

Where libraries like MUI ship a heavy theme engine and Chakra UI focuses on style props, Mantine bets on raw component coverage and built-in primitives. You get rich text editing (Tiptap), date pickers, notifications, a Spotlight command palette, charts, drag-and-drop, code highlighting, carousel, modals, and even a brand-new scheduler package — all from the same vendor, with the same API conventions.

Key Features of Mantine

• 120+ components, 100+ hooks: From basics like Button and TextInput to specialized widgets like RichTextEditor, Spotlight, Carousel, and the new FloatingWindow, OverflowList, Marquee, Scroller, and BarsList shipped in v9.0.
• CSS Modules, no runtime: Mantine v7 (late 2023) replaced Emotion with CSS Modules, eliminating the CSS-in-JS runtime entirely. The result: faster SSR, smaller bundles, and zero hydration mismatches in Next.js App Router.
• React 19 native: Mantine 9 requires React 19.2+ and uses the stable useEffectEvent in five core hooks (useHotkeys, useClickOutside, useWindowEvent, useCollapse, usePageLeave). The Activity component preserves state in hidden subtrees of Tabs.Panel, Stepper, and Collapse when keepMounted is set.
• Built-in form management: @mantine/form handles validation, dirty tracking, and async validators with no external dependency — no Formik, no React Hook Form needed unless you want them.
• New @mantine/schedule package: A full calendar/scheduling component with day, week, month views, drag-and-drop event editing, and recurrence — landing in v9.0 and unique among major React libraries.
• Combobox virtualization: The new useVirtualizedCombobox hook integrates with any virtualization library (TanStack Virtual recommended) so dropdowns of 10,000+ items stay smooth.

What Users Say About Mantine

On Reddit's r/reactjs and r/webdev, Mantine threads consistently rank among the most upvoted in the "what's your favorite component library" debates. A frequently quoted comment from a developer with 20 years of front-end experience calls it "hands-down the best component library I've ever used." On Hacker News, the most discussed praise points are the documentation quality and the breadth of hooks — many shops drop their react-use dependency entirely after adopting Mantine.

Criticism is real but narrow. Two recurring complaints surface across Reddit and Discord: (1) heavy visual customization is harder than MUI because Mantine doesn't expose a deeply token-driven theme tree — you reach for CSS overrides faster, and (2) the third-party ecosystem (templates, admin dashboards, premium themes) is meaningfully smaller than MUI's. A vocal minority also miss the old v6 styling API and prefer Emotion's runtime flexibility over the v7+ CSS Modules approach.

Mantine Pricing

Mantine is 100% free and open source under the MIT license. There are no paid tiers, no enterprise upsells, and no usage limits. The project is funded through Open Collective sponsorships rather than commercial licensing.

Plan	Price	What's Included
Open Source (only tier)	$0 forever	All 120+ components, all 100+ hooks, every @mantine/* package, commercial use, no attribution required

For teams that want pre-built layouts, Mantine UI (ui.mantine.dev) ships free copy-paste responsive blocks. There is no paid Pro tier — unlike Tailwind UI or shadcn/ui Premium.

Who Should Use Mantine?

Best for: Solo developers, indie hackers, and small-to-mid teams shipping React 19 + Next.js or Vite apps who want a comprehensive component set without paying for MUI X Pro. It is especially strong for SaaS dashboards, internal tools, and content-heavy sites that need rich text and forms out of the box.

Not ideal for: Enterprise teams that already standardize on Material Design (use MUI), projects that need a radically custom design system from scratch (use Radix or shadcn/ui with Tailwind), or React 18-only codebases that cannot upgrade to React 19.2 yet.

Pros and Cons

Pros:

• Largest component count of any free React library — 120+ vs Chakra's ~70 and Radix's ~30.
• Excellent documentation: every component page has live editable examples, props tables, and source links.
• No CSS-in-JS runtime cost since v7 — measurable bundle and SSR improvements.
• Built-in form, dates, charts, notifications, and Spotlight save 4–6 dependencies.
• Free under MIT — no commercial license tier to negotiate.

Cons:

• Visual theming is less granular than MUI's token system — non-default aesthetics take more CSS work.
• Smaller third-party template/admin-dashboard ecosystem than MUI or Ant Design.
• Mantine 9 hard-requires React 19.2+ — no LTS branch on React 18.
• Frequent breaking changes between major versions (v6 → v7 → v9) demand discipline on upgrades.

Alternatives to Mantine

Three named competitors worth comparing:

• MUI (Material UI): Larger ecosystem, ~6.7M weekly downloads, dominant Material Design implementation. MUI X (Data Grid, Charts, Date Pickers Pro) is paid but enterprise-grade. Heavier runtime than Mantine.
• Chakra UI: Smaller component set, recently rewritten on Panda CSS and Ark UI in v3. Style props are more ergonomic for one-off layouts; TypeScript ergonomics can feel verbose.
• shadcn/ui: Not a library but a copy-paste component collection on Radix + Tailwind. Maximum customization, zero runtime install — but you write and maintain the components yourself.

Verdict: Is Mantine Worth It?

Yes — for almost any new React 19 project in 2026 we'd start with Mantine. The combination of breadth, free-forever MIT licensing, mature documentation, and the v7+ runtime-free architecture is genuinely hard to beat. The 92/100 score reflects two real caveats: heavy custom theming still takes work, and the third-party template ecosystem lags MUI. If those tradeoffs don't apply to you, this is the React component library to default to.

Frequently Asked Questions

Is Mantine free?

Yes. Mantine is 100% free and open source under the MIT license. There are no paid tiers, no usage limits, and no required attribution. All @mantine/* packages are free for commercial and personal use.

What platforms does Mantine support?

Mantine targets the web exclusively. It works with any React 19.2+ environment — Vite, Next.js (Pages and App Router), Remix, Astro, and standard CRA-replacement bundlers. There is no React Native build.

How does Mantine compare to MUI?

MUI has roughly 10x the weekly downloads and a deeper enterprise theme system, but its premium data components (Data Grid, Charts) are paid. Mantine ships more components for free and has a lighter runtime since v7's switch to CSS Modules. For most non-Material projects, Mantine is faster to ship with.

Is Mantine open source?

Yes — fully open source under the MIT license. The source code is on GitHub at mantinedev/mantine with active maintenance and weekly releases.

Does Mantine work with Next.js App Router?

Yes. Since v7 dropped Emotion for CSS Modules, Mantine works cleanly with React Server Components and the Next.js App Router with no hydration mismatches. The official docs include a Next.js App Router setup guide.

What's new in Mantine 9?

Mantine 9.0 (released early 2026) requires React 19.2+, ships a new @mantine/schedule calendar package, adds five components (FloatingWindow, OverflowList, Marquee, Scroller, BarsList), brings async validation to @mantine/form, and adopts React 19's useEffectEvent across core hooks.