Custom software development at Kortex Labs means a fixed scope and a fixed price, agreed before work starts, for web applications, SaaS products, internal tools, customer portals and integrations, with AI built in where it earns its place. You see working software every week, and you own 100% of the code on delivery. Free quote within 24 hours.

What we build

  • SaaS products. Multi-tenant backends, billing, roles and permissions, and the one workflow your customers pay for.
  • Internal tools and dashboards. The spreadsheet process your team runs every day, turned into an application with an audit trail.
  • Customer portals. Self-service for documents, status and payments.
  • Integrations and APIs. Systems that should talk to each other, connected and monitored.
  • Data pipelines. Collection, cleaning and delivery of the data your business runs on.
  • AI features. Assistants on your documents, voice agents, and extraction from PDFs, email and calls.

How a fixed price works

  1. Scoping call. Thirty minutes on the problem, the users and what done looks like.
  2. Written scope and fixed quote within 24 hours. What is in, what is out, the timeline and the price.
  3. Weekly builds. Working software in your environment every week, not a reveal at the end.
  4. Handover. Deployment, monitoring, documentation and a runbook, and full transfer of code and IP.

Changes are normal. When scope moves, we agree the change and its price in writing before building it, so the total never surprises you. Read fixed price vs hourly development for the tradeoffs.

Engagement options

OptionPriceBest when
Product MVPFrom $12,000You need a launched product with auth, billing and one core workflow
Data and automation buildFrom $6,000A manual process or data source needs to run on its own
AI assistantFrom $8,000Your team or customers need answers from your documents
Fractional engineerMonthly retainerOngoing development or a codebase that needs a senior owner

Specialist pages

Web application development · SaaS development · API development & integration · AI integration · Internal tools

Stack

Python, FastAPI, Django and DRF, NestJS and Celery on the backend; React, Next.js, TypeScript and Tailwind on the frontend; PostgreSQL, Redis, Kafka and OpenSearch for data; OpenAI, Claude and Gemini for AI; Docker on AWS or GCP.

When we are not the right fit

If you need twenty people on a multi-year enterprise program, or developers billed by the hour to direct yourself, a larger software house or a staffing firm suits you better. We are built for companies that want a senior engineer to own a defined outcome. See how we work from Lahore and our case studies.

Frequently asked questions

How much does custom software development cost?

Our fixed-price builds start at $6,000 for data and automation, $8,000 for an AI assistant and $12,000 for a product MVP. Larger systems are quoted after a scoping call, always as a fixed price.

How long does custom software take?

Three to six weeks for a focused automation, about four weeks for an AI assistant, and six to twelve weeks for a product MVP.

Who owns the code?

You do. It lives in your repositories, and 100% of the source and IP transfers on delivery.

Can you work with our existing team?

Yes. We can own one part of the system, or work next to your engineers through the fractional retainer.