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

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

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 $149 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

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

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

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

// 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 →
• Live component preview →
• Compare otf-kit vs shadcn/ui →
• Compare otf-kit vs Tailwind UI →