Build your AI SaaS
this weekend.

The production-ready RAG starter kit for Next.js developers. Ingest PDFs & URLs in seconds, chat with your documents using GPT-4o, and deploy to Vercel in minutes — not weeks.

Get Starter Kit Features

4.9/5 from 200+ developers

MIT License · Deploy anywhere

Lifetime updates included

pages/api/chat.js

ingest-url.jsvector-store.js

1import { ingestPDF, ingestURL } from '@/lib/rag';
2import { createChat } from '@/lib/chat';
3
4// Ingest any document in seconds
5const vectors = await ingestURL({
6  url: 'https://docs.example.com',
7  namespace: user.id,
8  chunkSize: 1000,
9});
10
11// Stream AI responses instantly
12const { stream } = await createChat({
13  query: userMessage,
14  namespace: user.id,
15  model: 'gpt-4o',
16});

Next.js 16

OpenAI

Pinecone

LangChain.js

Vercel AI SDK

React 19

Tailwind CSS

Puppeteer

Browserless

Next.js 16

OpenAI

Pinecone

LangChain.js

Vercel AI SDK

React 19

Tailwind CSS

Puppeteer

Browserless

Next.js 16

OpenAI

Pinecone

LangChain.js

Vercel AI SDK

React 19

Tailwind CSS

Puppeteer

Browserless

Everything included

Production-ready, out of the box.

Stop spending weeks configuring boilerplate. FastRAG handles the infrastructure so you can focus on what makes your product unique.

Scraping

Web Scraping Engine

Paste any URL — docs site, landing page, or web app. Our Puppeteer + Browserless integration renders JavaScript, scrapes, cleans, and vectorizes content in seconds.

⚡ SPAs & Next.js apps supported

Ingestion

Multi-File PDF Ingestion

Drag & drop up to 10 PDFs simultaneously. Automatic chunking with configurable overlap ensures nothing gets lost — from dense legal contracts to research papers.

📁 10 files at once, up to 10MB each

Vectors

Smart Vector Optimization

Forced 1024-dim embeddings reduce your Pinecone storage costs by 33% versus default settings. Every token counts when you're paying for vector DB at scale.

💰 33% cost reduction on storage

Streaming

Real-Time Streaming Responses

Vercel AI SDK integration means users see answers appearing token by token. No loading spinners, no waiting — just an experience that feels instant and alive.

⚡ Token-by-token streaming via SSE

Multi-Tenant

Namespace Isolation

Each user's documents live in a private Pinecone namespace. Context never bleeds between tenants — your SaaS is enterprise-safe from day one.

🔒 User-scoped vector buckets

Mobile

Mobile-Native Chat UI

The chat interface is built mobile-first and feels native on iOS and Android. Tested on real devices — not just resized desktop layouts.

📱 Responsive on all screen sizes

Developer

No Black Boxes

Full access to every API route under pages/api. Swap the vector DB, change the LLM, tweak prompts — everything is your code. No vendor lock-in.

🔓 100% customizable, MIT license

Architecture

Headless Browser Support

Uses Browserless.io so Puppeteer runs safely in serverless environments. Renders React, Vue, and SPA sites perfectly without timing issues or bot blocking.

🌐 Serverless-safe headless Chrome

Lifetime

Lifetime Updates

Buy once, get every future update. Private GitHub repo access means you pull improvements the day they ship. No new version to purchase.

♾️ Forever access, private repo

Simple setup

From zero to
AI-powered app in four steps.

No ML expertise required. No infrastructure headaches. Just clone, configure, and ship.

Ingest01

Upload your content

Drop in PDFs or paste any URL. Our ingestion engine automatically scrapes, parses, and chunks your content using LangChain's RecursiveCharacterTextSplitter — with sensible defaults you can override.

Next: Embed & store in Pinecone

Step 01

// pages/api/ingest-url.js
const result = await ingestURL({
  url: 'https://docs.yourapp.com',
  namespace: req.user.id,
  chunkSize: 1000,
  chunkOverlap: 200,
});
// → "Processed 42 chunks in 3.1s"

Vectorize02

Embed & store in Pinecone

Text chunks are converted to 1024-dimensional embeddings via OpenAI's API, then stored in your Pinecone serverless index. Each user gets their own namespace — clean multi-tenancy from day one.

Next: Answer questions with GPT-4o

Step 02

// lib/vector-store.js
await pinecone
  .index('fastrag')
  .namespace(userId)
  .upsert(
    chunks.map((chunk, i) => ({
      id: `${docId}-${i}`,
      values: embeddings[i],
      metadata: { text: chunk },
    }))
  );

Chat03

Answer questions with GPT-4o

When a user asks a question, FastRAG retrieves the top-K most relevant chunks, constructs a context-rich prompt, and streams the GPT-4o response token by token — no full-page loads, no waiting.

Next: Ship to production in minutes

Step 03

// pages/api/chat.js
const matches = await vectorStore
  .similaritySearch(query, {
    topK: 5,
    namespace: userId,
  });
const { stream } = await streamChat({
  model: 'gpt-4o',
  context: matches,
  query,
});

Deploy04

Ship to production in minutes

Push to Vercel with one command. Edge functions handle thousands of concurrent chats with zero cold starts. Add your custom domain, configure your env vars, and you're live.

Step 04

# .env.local
OPENAI_API_KEY=sk-...
PINECONE_API_KEY=pcsk_...
PINECONE_INDEX=fastrag
BROWSERLESS_URL=wss://chrome.browserless.io...
# One-command deploy
$ vercel --prod
# ✅ https://yourapp.vercel.app

Real-world applications

Ship anything.
Built for every industry.

FastRAG is a foundation, not a template. Here's what teams are shipping with it — and what you can build this weekend.

Knowledge Base

Internal Company Wiki

Let employees query your entire Notion, Confluence, or custom docs in plain English. No more hunting through folders — just ask and get an instant, accurate answer.

↓ 60%

Support tickets

↓ 40%

Onboarding time

Customer Support

AI Support Agent

Train on your help docs, FAQs, and product manuals. Answer 80% of tier-1 tickets automatically — 24/7, in any language, without hiring more staff.

↑ 3×

Resolution speed

↑ 22pts

CSAT score

EdTech

AI Course Tutor

Upload lecture notes, textbooks, and syllabi. Students get instant answers from course material instead of waiting for office hours or digging through PDFs.

↑ 55%

Study efficiency

↑ 38%

Comprehension

Legal

Contract & Policy Q&A

Upload NDAs, contracts, compliance policies, or regulation PDFs. Lawyers and operations teams query them conversationally instead of reading hundreds of pages manually.

↓ 70%

Review time

↓ 90%

Missed clauses

Developer Tools

Code Docs Search

Point FastRAG at your API reference, README files, and changelogs. Developers find what they need in seconds instead of searching GitHub or reading docs page by page.

↑ 45%

Dev velocity

↑ 89%

Docs helpfulness

E-commerce

Product Advisor Bot

Ingest your product catalog, specs, and customer reviews. Build a conversational shopping assistant that upsells intelligently and handles product questions at scale.

↑ 28%

Conversion rate

↑ 18%

AOV

Loved by builders

Real devs. Real ships.
Real results.

Don't take our word for it. Here's what the community is building with FastRAG right now.

Marcus Chen

Indie Hacker · @marcusbuilds

“Shipped my AI doc assistant in 2 days. The code quality is insane for the price — every file is clean, well-commented, and easy to extend. This isn't some hacky boilerplate.”

✦ Shipped in 2 days

Priya Nambiar

CTO @ Veridian Tech · @priyanambiar

“We evaluated five RAG frameworks before finding FastRAG. The namespace isolation alone saved us two weeks of architecture work. Had it in production before the weekend was over.”

✦ Production in 48hrs

Diego Ramírez

Freelance Developer · @diegodev_

“I charge clients £5K–£12K for AI chat implementations. FastRAG is my secret weapon. The web scraping engine handles SPA sites that every other solution completely chokes on.”

✦ £12K client projects

Sarah O'Brien

Product Manager · @sarahobrienpm

“Even though I'm not technical, I got the demo running using just the docs. The creator replied to my support email within an hour. Incredible support for a £19 product.”

✦ Non-technical user

James Whitfield

AI Startup Founder · @jwhitfieldai

“We raised a pre-seed round partly on the back of a prototype built with FastRAG. The streaming responses are buttery smooth — investors thought we had a full engineering team.”

✦ Pre-seed fundraise

Lena Kovalska

Full-Stack Engineer · @lenakovalska

“The LangChain integration is done properly — not the 'copy-paste from a tutorial' version. Smart chunking, configurable overlap, clean abstractions. This is how it should be done.”

✦ Expert developer

40+

Developers shipped

4.9/5

Average rating

48hrs

Avg. time to ship

$19

One-time price

Simple pricing

Pay once.
Own it forever.

No subscriptions. No seat fees. No surprise bills. You only pay for your own infrastructure (OpenAI, Pinecone, Vercel).

Starter

Everything you need to ship your first production RAG app this weekend.

$19$29

one-time · deploy to unlimited projects

Get Starter Kit

Full Next.js 16 source code (Pages Router)
Web scraping engine (Puppeteer + Browserless)
Multi-file PDF ingestion (up to 10 files)
OpenAI GPT-4o chat integration
Pinecone vector store with namespace isolation
Vercel AI SDK streaming responses
Mobile-responsive chat UI
Private GitHub repository access
Lifetime updates included
Commercial usage — MIT license

🔒 Secure checkout via Gumroad · Instant delivery

Full comparison

FeatureStarterPro

Next.js 16 source code

PDF ingestion

Web scraping (Puppeteer)

GPT-4o chat streaming

Pinecone namespace isolation

MIT commercial license

Lifetime updates

Multi-tenant admin dashboard

Per-user analytics & usage

Auth integration (NextAuth.js)

Priority support

Questions about which plan is right for you? Talk to us →

Common questions

Everything you
need to know.

Still have a question after reading? Reach out — we reply within 24 hours.

You get an invite to a private GitHub repository (or a ZIP download) containing the complete Next.js source code — ingestion scripts, Pinecone configuration, chat API routes, the web scraping pipeline, and Vercel deployment templates. Everything is yours, forever.

Still have a question?

Contact support

Build your AI SaaSthis weekend.

Production-ready, out of the box.

Web Scraping Engine

Multi-File PDF Ingestion

Smart Vector Optimization

Real-Time Streaming Responses

Namespace Isolation

Mobile-Native Chat UI

No Black Boxes

Headless Browser Support

Lifetime Updates

From zero toAI-powered app in four steps.

Upload your content

Embed & store in Pinecone

Answer questions with GPT-4o

Ship to production in minutes

Ship anything.Built for every industry.

Internal Company Wiki

AI Support Agent

AI Course Tutor

Contract & Policy Q&A

Code Docs Search

Product Advisor Bot

Real devs. Real ships.Real results.

Pay once.Own it forever.

Full comparison

Everything youneed to know.

Build your AI SaaS
this weekend.

From zero to
AI-powered app in four steps.

Ship anything.
Built for every industry.

Real devs. Real ships.
Real results.

Pay once.
Own it forever.

Everything you
need to know.