BuilderKit

BuilderKit is a NextJS boilerplate for developers who want to build and ship AI SaaS products without wiring up the basics themselves.

It is an AI app builder kit sold as a one-time purchase, with no subscription, and the plans start at $99.

The cheapest tier, Landing Pages at $99, gives you 13 pre-built landing pages, customisable waitlist templates, Google Analytics, SEO optimisation and automated sitemap generation.

Starter costs $149 and adds the NextJS boilerplate, AI modules, 5 demo apps, Google auth and magic link login, Stripe and Lemon Squeezy payments, Supabase, Loops email integration, a privacy policy and terms of service, and an admin dashboard.

Pro at $199 has the same base but raises the demo apps to 15, including Deepseek, ChatGPT, Chat with PDF and an image generator, and includes 13 landing pages.

There is also a custom option for AI apps that starts at $199.

It covers everything in Pro plus custom design, a custom landing page, a custom app and end to end deployment.

The payment, auth and database pieces come already chosen, so you work within that stack.