DEV Community: Настя Степанова

How I Built a Multi-Provider AI Contract SaaS

Настя Степанова — Sat, 08 Aug 2026 09:28:49 +0000

I recently finished a major version of ContractAI, an AI-powered contract automation platform.
Instead of building a simple "prompt → contract" application, I wanted to build the surrounding workflow as well.
The architecture now covers:
AI contract generation
Risk analysis
AI negotiation
Rich text editing
E-signatures
Template marketplace
Stripe billing
REST API
Bulk generation
Team collaboration
Admin tools
Multi-provider AI
The application supports five providers:
OpenAI
Anthropic
Google Gemini
Groq
xAI
This allows the application to switch providers instead of depending entirely on one model vendor.
Marketplace
The platform currently contains 185+ contract templates across categories including business, SaaS, employment, real estate, finance, marketing and IP.
Templates can be free or purchased through Stripe.
Stack
Next.js
TypeScript
PostgreSQL
Prisma
TipTap
Stripe
Resend
BullMQ / Redis
Docker
Vercel
The live application is available here:
https://aicontract.live
The demo can be explored without creating an account.
I'm currently considering transferring the project to another founder rather than continuing to operate it myself, so I'm also interested in hearing what developers think the most interesting direction for the product would be.

I built a production-ready AI contract SaaS with generation, risk analysis, negotiation, e-signatures, 185+ templates, Stripe marketplace, REST API and 5 AI providers. Live demo: aicontract.live

Настя Степанова — Sat, 08 Aug 2026 09:26:54 +0000

How I Built a Multi-Provider AI Contract SaaS

Настя Степанова — Sat, 08 Aug 2026 09:22:06 +0000

Per-language AI prompts for professional legal contract generation — what actually works

Настя Степанова — Thu, 06 Aug 2026 10:05:18 +0000

Built ContractAI and learned the hard way that "write in French" in a system prompt produces mediocre legal documents.

What works: separate system prompts for each language, written in the target language, with specific legal terminology instructions.

Example for French:
"Rédige le contrat dans un français juridique professionnel utilisé dans les contrats commerciaux."

This produces documents that read like they were drafted by a French commercial lawyer, not translated from English.

Live demo: https://www.aicontract.live
Stack: Next.js 14, Groq, PostgreSQL, Prisma, Stripe, TipTap, BullMQ.

How I built multilingual AI contract generation with per-language legal prompts

Настя Степанова — Wed, 05 Aug 2026 18:38:07 +0000

Built ContractAI — generates professional legal contracts in 8 languages. The trick was per-language system prompts with native legal terminology instead of just translating.

Live: https://www.aicontract.live
Demo: https://youtu.be/QY2-RWtLevM

Stack: Next.js 14, Groq, PostgreSQL, Prisma, Stripe, TipTap, BullMQ.

Happy to discuss the implementation.

I built a white-label AI contract SaaS — full demo + stack breakdown

Настя Степанова — Wed, 05 Aug 2026 07:51:25 +0000

Just shipped ContractAI (aicontract.live) — AI contract automation platform.

Demo: https://youtu.be/QY2-RWtLevM

Stack: Next.js 14, PostgreSQL, Prisma, NextAuth v5, Stripe, TipTap, BullMQ, pdf-lib, Resend. 5 AI providers: GPT-4o, Claude, Gemini, Groq, Grok.

Features: contract generation, risk analysis, e-signatures, bulk CSV, version history, team collaboration, REST API, admin panel. White-label ready.

Open to questions about the stack — and yes, the project is available for acquisition.

How I built a white-label AI contract SaaS with Next.js 14, GPT-4o, and Stripe

Настя Степанова — Mon, 03 Aug 2026 18:16:33 +0000

I spent the last few months building ContractAI (aicontract.live) — a full AI contract automation platform. Here's what's under the hood.

Stack

Next.js 14 App Router + TypeScript
PostgreSQL + Prisma ORM
NextAuth.js v5 (email + Google + GitHub)
Stripe subscriptions
5 AI providers: OpenAI, Anthropic, Google Gemini, Groq, xAI Grok
Resend for emails
BullMQ + Redis for background jobs
TipTap rich text editor
pdf-lib + docx for exports

Key features I'm proud of

AI risk analysis that scans contracts and returns severity levels with fix suggestions
Canvas e-signatures with IP logging and full audit trail
Bulk generation — upload CSV, generate 50 contracts simultaneously
White-label support via environment variables Lessons learned
Streaming AI responses makes the UX feel much faster
Prisma + PostgreSQL on Neon is a solid free-tier combo
BullMQ is great for bulk jobs but Redis adds infrastructure complexity

Live demo: aicontract.live

How I built multi-provider AI (OpenAI/Groq/Claude/Gemini) in Next.js 15 — switchable from admin panel

Настя Степанова — Fri, 31 Jul 2026 19:29:18 +0000

I built an invoice SaaS and the most interesting part was making AI providers switchable at runtime.

Here's the core idea — provider and model stored as DB singleton:

const settings = await db.aISettings.findUnique({ where: { id: "singleton" } });

switch (settings.provider) {
case "openai":
case "groq": // same OpenAI-compatible API
return generateOpenAICompat(settings, apiKey, prompt);
case "anthropic":
return generateAnthropic(settings, apiKey, prompt);
case "gemini":
return generateGemini(settings, apiKey, prompt);
}

Admin changes provider in UI → takes effect immediately, no restart.

Also used pdf-lib for server-side PDF (no Puppeteer) and Vercel Cron for recurring invoices.
https://stepanova12.gumroad.com/l/urykyi
https://nastasiia16.lemonsqueezy.com/checkout/buy/3d3e5ae5-f8fc-46bc-a1bd-1ba9d8271d34

How I built a LegalTech SaaS with Next.js 14, 5 AI providers and e-signatures

Настя Степанова — Fri, 31 Jul 2026 18:28:34 +0000

I built ContractAI — a platform for generating, analyzing and signing legal contracts with AI. Here's what I learned.

The hardest parts:

Abstracting 5 AI providers — had to build a unified interface so OpenAI, Claude, Gemini, Groq and Grok all work the same way

E-signature system — canvas drawing, IP logging, audit trail, email delivery with signed PDF

Bulk generation — CSV upload → 50 contracts generated simultaneously with rate limiting

Stack: Next.js 14 App Router · TypeScript · PostgreSQL · Prisma · NextAuth v5 · Stripe · TipTap · Tailwind

Live demo: https://ai-contract-builder-gilt.vercel.app

I built an AI contract generator with Next.js 14 — lessons learned and what's next

Настя Степанова — Fri, 31 Jul 2026 10:47:21 +0000

I built an AI Contract Builder SaaS — selling it for $5,000 Теги: saas, nextjs, typescript, webdev

Настя Степанова — Thu, 30 Jul 2026 14:30:28 +0000

The unique feature

AI Contract Negotiation — paste any contract, choose your
perspective (buyer/seller/employee/tenant), and AI:

Gives a Favorability Score (0-100)
Flags every risky clause with severity (LOW/MEDIUM/HIGH/CRITICAL)
Writes counter-proposals: original text → suggested replacement → reasoning
Saves full renegotiated contract to your editor

DocuSign, PandaDoc, ContractBook — none of them have this.

What else is included

Chrome Extension (Manifest V3) — right-click any contract text
Embeddable Widget — 1 script tag on any website
Lifetime Deal page ($299/$499/$999 tiers)
REST API + Zapier/Make receiver
5 AI providers (Groq free)
12 contract languages
Team collaboration with email invites
Contract Approval Workflow
AI Contract Summarizer
Bulk CSV → 50 contracts
Full Admin Panel (real DB metrics)
15 SEO landing pages
Vercel Cron email onboarding
White-label runtime

Numbers

227 TypeScript files
19,505 lines of code
50 API routes
42 pages
0 TypeScript errors
~$0/month to run

Tech stack

Next.js 14 · TypeScript · Tailwind · Prisma · PostgreSQL ·
NextAuth v5 · Stripe · Resend · TipTap · Framer Motion

Live demo

https://ai-contract-builder-gilt.vercel.app
(Click "Try live demo" — no signup needed)

Sale details

$8,000 listing | Buy Now $5,000 firm
Transfer: GitHub repo + Vercel + Neon DB + docs
Sold as-is, no support

DM or comment if interested.

I built an AI Contract Builder SaaS - now selling it for $3,500 Теги: saas, nextjs, typescript, webdev

Настя Степанова — Wed, 29 Jul 2026 20:40:55 +0000

I built ContractAI over the past months and I'm selling it.

What it does

Users describe a contract in plain language → AI generates a complete legal document in 30 seconds. 15+ contract types, 12 languages.

Tech stack

Next.js 14 + TypeScript
Prisma + PostgreSQL (Neon)
NextAuth v5
Stripe billing
TipTap editor
Resend emails
Docker + GitHub Actions CI/CD

Unique features (competitors don't have these)

AI Contract Negotiation — paste any contract, AI analyzes it from your perspective (buyer/seller/employee/etc), flags risky clauses, generates counter-proposals. DocuSign doesn't have this.

5 AI providers — Groq (free), GPT-4o, Claude, Gemini, xAI Grok. Not locked into one API.

REST API — /api/v1/generate, /api/v1/analyze with API key auth

Bulk generation — CSV upload → 50 contracts at once

Full admin panel — real-time stats, user management, feature toggles

Numbers

176 files, 35 API routes, 20 pages
0 TypeScript errors
Live on Vercel

Live demo

https://ai-contract-builder-gilt.vercel.app
(Click "Try live demo" - no signup needed)

Sale details

Asking: $5,000 | Buy Now: $3,500 firm
Transfer: GitHub repo + Vercel + Neon DB + all env vars
Sold as-is, no support, full docs included