# otf-kit vs Mantine — design-system showdown for 2026

> Mantine is a mature web-only React component library. otf-kit ships the same DX cross-platform (web + iOS + Android) and includes full-stack kits. Honest matrix + when to pick which.
> Source: https://otf-kit.dev/compare/otf-kit-vs-mantine

- **Compared with:** Mantine (https://mantine.dev)
- **Verdict:** Pick Mantine if you ship web-only and want maximum primitive depth (charts, forms, dropzones built in). Pick otf-kit if you need iOS + Android parity or want kits with auth and Stripe pre-wired.
- **Best for:** React + React Native devs, Form-heavy app builders, Cross-platform startups

## TL;DR

Mantine is one of the most polished web-only React component libraries — 7 years of maturity, deep primitive set, well-loved by full-stack developers building admin panels and SaaS dashboards.

otf-kit is a different shape: **cross-platform parity** (Tamagui under the hood for native) + **paid full-stack kits** that include the backend. Mantine ends at the component layer; otf-kit ends at a deployable product.

## Feature matrix

| | otf-kit | Mantine |
|---|---|---|
| **Platforms** | Web + iOS + Android | Web only |
| **Component count** | 198+ web · 80+ native | 130+ |
| **Form helpers** | React Hook Form integration shipped | `@mantine/form` (proprietary) |
| **Charts** | 14 chart components (Recharts-based) | `@mantine/charts` |
| **Notifications / modals** | Toast + Dialog primitives | `@mantine/notifications`, `@mantine/modals` |
| **Themes shipped** | 17 named themes | 1 default theme + token system |
| **Dark mode** | First-class on every theme | First-class |
| **Full-stack kits** | SaaS ($99) · Fitness ($99) — Hono + Drizzle + Better Auth + Stripe wired | None |
| **Mobile path** | `@otfdashkit/ui-native` (Tamagui) | None — would need a separate library |
| **Underlying primitives** | Radix + Tailwind v4 | Custom + emotion |
| **Bundle size** | ~25 KB gzip core | ~50 KB gzip core |
| **AI tooling** | Cursor / Claude Code / Lovable configs in every kit | None official |
| **Pricing** | SDK free · Kits $99 | MIT free |

## When Mantine wins

- You only ship **web**, you want **maximum primitive depth out of the box** (rich text editor, dates, dropzone, carousel — all proprietary), and you don't want to wire those up yourself.
- You're building **internal tools / admin panels** where component breadth matters more than design polish.
- You prefer the `useDisclosure`/`useForm`/`useHotkeys` hook ecosystem Mantine standardized.
- You don't need a backend to ship — Mantine assumes you have one.

## When otf-kit wins

- You're shipping **cross-platform** (Expo + web). Mantine doesn't run on RN; otf-kit's parity API does.
- You want **17 designed themes** to pick from, not "make your own" from primitives. Linear, Glass, Midnight, Minimal — they're built and tested.
- You want **a kit with backend included**, not just components. Saving 1–2 weeks of auth/Stripe wiring is worth $99 the first time.
- You want a **smaller core** (~25 KB vs Mantine's ~50 KB).
- Your team is using **Cursor / Claude Code / Lovable** — otf-kit ships the configs.

## Code comparison

```tsx
// Mantine — web only
import { Button, useDisclosure } from '@mantine/core'

const [opened, { open, close }] = useDisclosure(false)

<Button onClick={open}>Open</Button>
```

```tsx
// otf-kit — same on web AND native
import { Button, useDisclosure } from '@otfdashkit/ui'  // or '@otfdashkit/ui-native'

const [opened, { open, close }] = useDisclosure(false)

<Button onPress={open}>Open</Button>
```

(otf-kit deliberately matches Mantine's hook names where the semantics line up — porting between them is mostly a find/replace + onClick → onPress for native.)

## Migrating from Mantine

If you're on Mantine and adding mobile to the roadmap:

1. `bun add @otfdashkit/ui @otfdashkit/ui-native @otfdashkit/tokens`
2. Replace `from '@mantine/core'` → `from '@otfdashkit/ui'` for web
3. For native, mirror imports from `@otfdashkit/ui-native`
4. Move from emotion classes to Tailwind utility classes (otf-kit ships Tailwind v4)

The form/dialog/notification primitives have parity APIs — same hook names, same return shapes.

## FAQ

**Does otf-kit have all the primitives Mantine has?**
The 130 most-used Mantine primitives have direct otf-kit equivalents. Mantine's specialty packages (rich text editor, carousel, dropzone) aren't in our scope yet — bring your own for those.

**What about Mantine's UI Kit?**
Mantine's free UI examples are layouts, not full apps. otf-kit's paid kits ship deployable products with auth + database + Stripe.

**Bundle size difference matters?**
For most apps it's noise. For apps where every KB matters (consumer SPAs), the ~2× difference adds up.

## Try otf-kit

- [Free SDK on npm →](https://www.npmjs.com/package/@otfdashkit/ui)
- [Live component preview →](/components)
- [Compare otf-kit vs shadcn/ui →](/compare/otf-kit-vs-shadcn-ui)
- [Compare otf-kit vs Tailwind UI →](/compare/otf-kit-vs-tailwind-ui)