Nimbus
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Next.js 15 · Vercel AI SDK · GPT-4o mini

Launch your AI product this weekend, not next quarter.

Nimbus is a complete AI SaaS starter: a streaming chat with saved conversations, a credit system, Stripe subscriptions and credit packs, auth and email — wired together, typed end to end, ready to deploy.

Start for freeSee pricing
  • Streaming GPT chat
  • Credit-based billing
  • Auth + Stripe wired in

Everything an AI product needs, already built

The chat, the credits, the billing and the auth are the parts every AI SaaS rebuilds. Here they are, done properly, so you can spend your time on what makes your product yours.

Streaming AI chat
Token-by-token responses with the Vercel AI SDK, Markdown and syntax-highlighted code, copy, regenerate and stop — and every conversation saved per user.
A credit system that adds up
Free credits on signup, one per message, race-safe deductions in Postgres, a live balance in the navbar and an upgrade prompt instead of a dead end.
Subscriptions and credit packs
Stripe Checkout for monthly plans and one-time top-ups, the Customer Portal, and a signed webhook that refills credits on every renewal.
Auth and onboarding
Email, Google and GitHub sign-in, protected routes, and a first-run flow where new users pick a use case that tunes the assistant.
Conversations, done right
A ChatGPT-style sidebar: create, rename and delete threads, auto-generated titles, and history scoped to each user by row-level security.
Swap the model in one line
GPT-4o mini out of the box, but the provider is abstracted — point it at Anthropic or any other model without touching the app.

Simple, credit-based pricing

Start with free credits. Subscribe for a monthly allowance, or buy a one-time pack. One credit per message. Cancel any time.

Free
Kick the tyres with 20 credits.

$0/month

  • 20 credits to start
  • GPT-4o mini chat
  • Unlimited conversations
  • Email + OAuth sign-in
Create free account
Pro
Most popular
For people who use AI every day.

$19/month

  • 500 credits every month
  • GPT-4o mini chat
  • Priority streaming
  • Email support within 24h
Start with Pro
Business
For teams and heavy workloads.

$49/month

  • 2,000 credits every month
  • Everything in Pro
  • Buy top-up credit packs any time
  • Priority support
Start with Business

Need a top-up? Buy credits outright

No subscription required. Credit packs never expire and are added to your balance instantly.

100 credits

$9 one-time

Buy

500 credits

$39 one-time

Buy

Everything above is already built

Clone Nimbus, add your keys, and the next thing you write is your actual product.

Create your account