MantleKit
Next.js SaaS Boilerplate & Starter Kit

The Next.js SaaS boilerplatethat ships with everything.

Auth, payments, ecommerce, CMS, admin, kanban, support tickets, SEO defaults, and 13+ polished themes. Start with the CLI, then add your keys when you're ready.

5min
Approx Install Video
$49+
One-Time Pricing
13+
Distinct Themes
20+
Built-In Modules
MantleKit
Features

Everything wired up.
Nothing left to configure.

MantleKit covers the repeated SaaS jobs in a few connected systems, so the page is easier to scan and the product is easier to understand.

Launch operations

The admin surface that makes MantleKit feel like a product backend, not just a NextJS install.

  • Project Health
  • Launch Mode
  • Analytics
  • Calendar and Kanban
  • Cookie Consent
  • Notes and TODO's

Core SaaS plumbing

The launch-critical pieces that usually eat the first week of a new build.

  • Supabase auth
  • Stripe, Lemon Squeezy, Polar
  • Resend, Mailgun, Brevo
  • Protected routes

Content and SEO

A content foundation for docs, posts, support pages, metadata, and search visibility.

  • MDX blog
  • CMS for posts and pages
  • FAQ and knowledge base
  • Sitemap, robots, JSON-LD

Commerce and support

Sell digital products, collect requests, and manage customer operations from one codebase.

  • Ecommerce storefront
  • Orders and customers
  • Forms and media
  • Support tickets

Polish and extensibility

The parts that help a shipped app feel owned instead of looking like every other boilerplate.

  • 13+ visual themes
  • AI assistant
  • Teams and roles
  • Reusable landing sections
Theme marketplace

Show up with a look that already feels built.

MantleKit ships with distinct visual systems, not slight color swaps. Pick a theme, keep the same components, and launch with a frontend that fits the product you are selling.

13+ production-ready styles
MantleKit theme preview card stack showing multiple website styles
Guided CLI setup

From zero to deployed
in about 5 minutes.

Launch faster

The boring setup work gets cleared first.

Run the CLI, choose your stack, then fill in the real keys. MantleKit gets you to a working app before setup fatigue sets in.

mantlekit terminal
Product Preview

Frontend polish plus a real backend.

MantleKit is not just a landing page starter. The dashboard, content tools, launch workflow, support systems, and commerce operations ship as part of the product.

MantleKit Admin

A full backend for content, operations, support, ecommerce, launch workflow, team permissions, and internal planning. Explore the surface area visitors are actually buying when they choose Pro or Agency.

Shadcn-style adminPro + Agency surface
Backend modules
18 visible
Launch confidence

See what is still blocking launch.

WorkspaceProject Health

Project Health turns setup state into a real dashboard workflow, with checks for envs, branding cleanup, sitemap/robots, products, and launch readiness.

Passed
14
Warnings
3
Failures
1
Launch checklist
What still needs attention before go-live
7/8 complete
Supabase connected
Pass
Custom domain configured
Pass
Sitemap and robots live
Pass
Branding cleanup finished
Review
First product published
Pass
Legal pages reviewed
Pass
Readiness summary
Passed
14
Warnings
3
Failures
1
What teams like about it

Instead of wondering whether the install is ready, Project Health turns setup into a visible workflow with checks, warnings, and a clear path to launch.

Flags incomplete env and provider setup
Surfaces leftover starter content before launch
Turns setup into a checklist instead of a guessing game
Behind the kit

One builder. Familiar tools. Nothing hidden.

MantleKit ships with a public changelog, recorded setup walkthroughs, and a stack that will not lock you in.

Founder
Built by me, Garratt Campton.
While technically MantleKit's competitors are other boilerplates and starter kits, I believe my main competition is WordPress and Wix sites.

I aim to bridge the gap between coding and easy UI installs. In the coming months I will be adding a Launch platform for non-coders with AI assisted theme and content changes.
Garratt Campton, founder of MantleKit
Real receipts

Real person, real product, real receipts. Inspect everything before you pay.

Stack
A stack you already know.
No exotic platform underneath. Next.js App Router, Supabase auth and database, Vercel deploys, and Stripe checkout.
Pricing

One purchase.
Lifetime access.

Landing
$49
Static site, no database needed
  • 1 Theme
  • Landing Page Components
  • MDX Blog (Static)
  • Support Pages
  • Help & FAQ Pages
  • 1 Email Provider
  • 1 Personal Licence
Starter
$79
Perfect for your first SaaS
  • Everything in Landing
  • Supabase Auth
  • Payment Provider
  • MDX Blog with Social/Comments
  • Transactional Email
  • Comment Moderation Settings
Most Popular
Pro
$149
Everything you need to ship
  • Everything in Starter
  • All Themes + New Themes
  • All 3 Payment Providers
  • All Email Providers
  • Ecommerce + CMS
  • Form Builder + Media Library
  • Chat Support Widget
  • Ticketing System
  • Admin Dashboard
  • Calendar + Analytics
  • AI Assistant
  • Teams + Moderation Inbox
Agency
$249
Build for your clients
  • Everything in Pro
  • Commercial Licence
  • Unlimited Client Projects
  • Priority Support
  • Full Workspace Toolkit
Feature Comparison

More built in.
Less stitching together.

If you care about total surface area, MantleKit wins on feature count. This comparison is based on publicly documented built-in features from official product pages and docs.

Built-in Feature
MantleKit20/20
ShipFast6/20
MakerKit10/20
Authentication
Social OAuth
Payments / subscriptions
Multiple payment providers
Blog / content docs
SEO defaults
Admin dashboard
Teams / roles
Team switching
Ecommerce storefront
CMS
Form builder
Media library
Kanban board
Support tickets
Calendar planning
Analytics dashboard
Comment moderation
AI assistant
Multiple polished themes

“Yes” means included or explicitly documented as a built-in capability, not a third-party marketplace add-on or custom implementation you still need to build yourself. Sources were verified from official product pages and documentation on April 26, 2026. Snapshot available on request.

FAQ

The questions people ask before they buy.

A quick answer block for the big questions: what MantleKit is, who it is for, and why the backend matters as much as the frontend.

What is MantleKit?

MantleKit is a Next.js SaaS boilerplate that ships with auth, payments, ecommerce, CMS, blog, support flows, and a real admin dashboard instead of stopping at landing pages and login screens.

How is MantleKit different from ShipFast or MakerKit?

The biggest difference is backend surface area. MantleKit leans harder into operations: Project Health, Launch Mode, orders, customers, licences, analytics, notes, tickets, teams, and richer CMS tooling are built into the product.

Who is MantleKit for?

It is built for indie hackers, freelancers, and agencies who want to launch faster without inheriting a shallow starter kit. The lower tiers fit simpler launches, while Pro and Agency unlock the full dashboard and workspace tooling.

Does MantleKit include ecommerce and a CMS?

Yes. MantleKit includes a storefront, checkout integrations, orders, customers, licence/download flows, and a structured CMS with SEO fields, media support, and custom content types.

Can I keep the site private while I set everything up?

Yes. Launch Mode lets you hide the public frontend behind a branded coming-soon page while logged-in admins continue working in the dashboard.

How quickly can I get from install to deploy?

Garratt has videos showing an approximate 5 minute install for a full setup. Starter Tier is usually much less because there is less to configure.

Stack Costs

Launch on free tiers, then upgrade when it matters.

MantleKit is the one-time purchase. The stack around it can start on free plans for hosting, database, email, chat, and checkout, so infrastructure costs can wait until usage or revenue justifies them.

Vercel Hosting

Deploy the app on a free starter plan while traffic is still early.

Supabase / Others

Use free database, auth, and storage allowances while you validate demand.

Brevo / Resend

Send setup, auth, and purchase emails without committing to a monthly bill first.

Stripe / Others

Hosted checkout can be connected without a monthly platform fee.

Tawk.to

Live chat and basic support can stay free while the product finds traction.

Exact provider limits change over time, but the launch pattern is simple: start lean, prove the product, then upgrade the services that are actually doing work.

Spend the first month on your product.
Not on plumbing.

Auth, payments, admin, content, support, and launch tools are already in place, so you can spend your build time on what makes the product yours.