You need an admin dashboard for a SaaS and you are deciding whether shadcn/ui, Mantine or bare Radix Primitives should sit underneath it. Before you run any CLI, answer one question: who on your team will review upstream component changes six months from now? If the honest answer is nobody, that answer picks your library, and the rest of this post shows why.
Every admin dashboard has the same skeleton. A sidebar, a top bar, a table that must sort and filter and paginate, forms that cannot lose the user's work, and a settings page nobody designed on purpose. Whether shadcn/ui can render that is not in doubt. What you take on when the CLI copies the files into your repository is the real decision.
Is shadcn/ui a good base for a SaaS admin dashboard?
Yes, when the admin UI has to look like your product and someone will still own the component layer a year from now. It is a poor fit when nobody will maintain the copied code after launch.
Is shadcn/ui a component library?
No. The shadcn/ui documentation says so directly: "This is not a component library. It is how you build your component library." It describes a code distribution platform, with open code you edit and a CLI plus flat-file schema for sharing components. Styling is Tailwind classes, so if that is unfamiliar, read how Tailwind CSS works as a utility-first framework first.
A library is a dependency you upgrade. This is a starting point you inherit. Everything else in this post follows from that single difference.
When is it the right base?
Both conditions matter, and teams skip the second one. A B2B SaaS product sold to other companies will eventually get its admin surface themed for a customer, audited or extended in ways no library author planned. Owning the source is what you want then: you change the markup and ship, without waiting for an upstream maintainer to accept a prop.
The condition fails in an obvious case. Consider a team with three weeks of runway, no designer, an internal tool four people will open and nobody assigned to the UI after launch. There the copied files are unowned surface area, and a package you upgrade with one command is the calmer choice.
Theming is a genuine strength. The theming docs describe semantic tokens such as background, foreground and primary defined as CSS variables, which you override in your own CSS. If your team also wants a design system, this gives you raw material and no opinion on how to run it.
What does owning the components cost you?
It costs you every fix and every upgrade, because nothing updates the copied files for you. The recurring bill is review time, not install time.
The shadcn/ui repository has an open discussion asking for an easier way to update components. The original poster wants a single update command, and commenters share shell loops that re-add each component. The thread notes that the tool only offers overwrite, not a merge for locally modified files. The thread shows no direct maintainer answer on 30 September 2026, so treat merging upstream changes as manual work.
With an npm package, an upstream fix arrives as a lockfile bump. Here it arrives as a diff you must notice, evaluate and merge by hand against markup you have almost certainly customised.
Why is the data table the component to budget for?
Because a dashboard is mostly tables, and the docs describe the table as a composition you wire up yourself. The data table guide builds on TanStack Table, needs @tanstack/react-table installed separately, and says sorting requires wiring state such as SortingState and onSortingChange. Filtering and pagination are opt-in features too.
Accessibility is the part I would check first. The docs call the components accessible, and Radix's own site describes its primitives as screen-reader tested, but a table you customise is a table you must test yourself. The docs do not publish an audit of the defaults, so no pass rates are quoted here. Run axe-core and a screen reader against your own table, combobox and chart before a customer's security questionnaire arrives.
A short test keeps that check honest. Sort a column using only the keyboard and confirm that focus stays on the header. Turn on a screen reader and listen for whether the sort direction and the number of rows are announced. Filter down to zero results and check that the empty state is spoken aloud. If any of the three fails, the fix belongs in your copy of the component, which is exactly what ownership means. Write the fix down where the next developer will find it, because an undocumented patch is what turns an owned component into a mystery.
Consider a product like Callidus, a React, TypeScript and Firebase multi-tenant SaaS with six roles: super admin, owner, admin, manager, practitioner and receptionist. In a system like that, each role sees a different set of columns and actions, which is my inference for why role-aware tables matter more than any single component.
shadcn/ui vs Mantine vs Radix Primitives: which fits an admin panel?
Mantine fits internal tools that must ship fast, shadcn/ui fits product-grade interfaces you will customise, and Radix Primitives fit teams building their own design system. The trade is breadth against control.
| shadcn/ui | Mantine | Radix Primitives | |
|---|---|---|---|
| Delivery | CLI copies source into your repo | npm packages you import | npm package you import |
| Styling | Tailwind classes plus CSS variables | PostCSS with CSS modules support | Unstyled, bring your own |
| Breadth | 70+ base components per the docs | 80+ components in the core package | Primitives only, no visual layer |
| Upgrades | Manual, component by component | Version bump | Version bump |
| Best fit | Product UI you will customise | Internal tools that must ship fast | Your own design system |
| Real cost | Long-term maintenance | Fighting the theme when you diverge | Building the visual layer |
The counts come from each project's own pages: shadcn/ui's docs, Mantine's core package page, which lists roughly 80 or more components and shows v9.6.3 on 30 September 2026, and Radix's primitives page, which describes them as unstyled and accessible. Mantine also ships a separate @mantine/form package, plus date inputs, charts, notifications and a rich text editor. That breadth is the real trade: you assemble less, and you live inside Mantine's theming model on the day your designer wants something it did not anticipate.
Radix sits at the far end. It gives behaviour and accessibility with no visuals. That is the right choice when you are genuinely building a design system and pure overhead when you are shipping screens this month.
What about forms?
shadcn/ui supports several form libraries and composes each field by hand, which buys control per form and leaves accessibility wiring to you. The forms docs list React Hook Form, TanStack Form and Formisch. In the React Hook Form guide you compose Field, FieldLabel and FieldError around a Controller, and the example validates with zod v3 while noting any Standard Schema library works.
The detail worth flagging is small. The guide says to add data-invalid to the Field and aria-invalid to the control. Skip that on one form out of forty and nothing breaks visibly, but a screen reader stops announcing the error. Mantine takes the opposite position and ships form state as its own package. Neither is wrong. One optimises for control and the other for how many decisions you make per form.
What changed in July 2026 and what should you do next?
Base UI replaced Radix as the default primitive layer for new shadcn/ui projects in July 2026. Radix is still supported, so existing dashboards keep working, but new components you pull will assume the new default.
The changelog entry says npx shadcn init now presents Base UI by default, and -b radix opts out. It says Radix is not being deprecated and both libraries keep receiving updates, except for components that exist only in Base UI. It gives the reason: projects created through shadcn's tooling favoured Base UI over Radix 2 to 1, and Base UI reached version 1.6.0 with more than 6 million weekly downloads. It also mentions an AI-powered migration skill for gradual moves.
A codebase running two primitive libraries at once is a slow tax on everyone who reads it. Pick one per project and write the choice in the README.
Here is the order I would follow, as a recommendation:
- Name the lifespan. Under six months, or nobody owns the UI layer after launch? Use Mantine and move on.
- Budget for the hard components. If the product will face a security questionnaire, reserve hours to test the table, combobox and charts before you promise a date.
- Pick the primitive on day one. Base UI for anything new, Radix if the codebase already runs it.
- Use a template for the shell only. Layouts such as the sidebar are documented as composable, and the docs point to a blocks library. Hand-build anything that displays customer records.
- Schedule the upgrade review. Put a recurring calendar entry in place, or admit nobody will and choose a package.
For the wider stack around this decision, see the SaaS MVP stack I recommend. Then answer one question before you run the CLI: when a shadcn/ui component ships a fix six months from now, whose calendar does that land on?