Blended Human + AI Development, Priced Monthly
Simple, Transparent Monthly Pricing
Three plans pairing a senior developer with supervised AI development capacity — pick the weekly output you need, billed as one predictable monthly price.
The Difference Published Pricing Makes
Most custom software is quoted behind a sales call, built by whoever's free, and delivered as code you can't take with you. Here's what changes when the prices are on the page and the model is built around you owning the result.
The typical shop
- "It depends" — no price until a sales call
- An account manager relays what you need
- Junior developers learn on your budget
- The code stays a black box you can't take
The QOS model
- Published monthly prices, right on this page
- A senior developer directs your build
- AI does the junior-level work, senior-reviewed
- You own all the code from day one
How the Monthly Model Works
Our blended plans bundle a fixed amount of weekly development capacity — a senior developer plus supervised AI development capacity — into one flat monthly price. You’re not buying hours to track against an invoice; you’re buying a team’s steady weekly output, billed the same predictable amount every month.
Pay month-to-month and stay fully flexible, or commit to 12 months and every plan drops 10%. Either way you’re billed monthly, with no long build-up of hidden charges and no surprise change orders mid-project.
As your roadmap changes, so can your plan. Move up to Grow or Scale when a launch is close and more work is in flight, then step back down when things settle — capacity flexes with the business.
And whatever we build, you own — all the code, data, and IP, from day one. To see the full range of what we build, visit QOS Software.
What Is an AI-Junior Developer?
An AI-junior developer is supervised AI development capacity — the junior-level coding work on your project, drafted by AI and directed and reviewed by a senior developer, rather than by a junior engineer learning on your budget. It's a delivery method that ships software faster, not an AI product writing your software unsupervised.
- A senior developer specs every task before any code is written
- The AI drafts the junior-level implementation work
- A senior developer reviews every line it produces
- Nothing ships without passing that senior review
- Your project's coding standards are enforced throughout
- You own all of the resulting code and IP
- The senior stays accountable for the whole outcome
The result is senior-quality software, shipped faster — the AI accelerates the work without ever replacing the judgment behind it. Looking for a standalone AI product, agent, or automation instead? That’s our sister company QOS Agentic.
Why the Blended Model Ships Better Software, Faster
Most shops make you choose between senior rates you can't afford and junior hands you can't trust. The blend gives you both ends done right — senior judgment on every decision, automated speed on the routine work.
- A senior developer directs every build from day one
- AI does the junior-level work, so software ships faster
- You own all the code, data, and IP outright
- The discipline of a practice building software since 2007
What's Included in Every Plan
Every plan — Build, Grow, and Scale — includes the same core commitments. The plans differ only in how much weekly capacity you get, not in the quality of the work or the terms.
- A senior developer directing your build
- Supervised AI development capacity
- Senior code review on the work
- QA on every release
- Full ownership of your code, data, and IP
- Our standard AI development model, included
- CTO oversight
- Scrum management (hours by plan)
Not sure which plan fits? Book a scoping call and we’ll
help you right-size it — honestly, before you commit.
All plans run on our standard AI development model. Need a specific model like ChatGPT or Claude? Available on request at additional cost — just ask.
Blended senior + AI development plans
Every plan pairs a senior developer with supervised AI development capacity, billed monthly.
| Plan | Weekly capacity | Month-to-month | 12-month commitment (save 10%) |
|---|---|---|---|
| Build | 10 hrs senior + 20 hrs supervised AI + 1 hr scrum | $4,875/mo | $4,388/mo |
| Grow (most popular) | 20 hrs senior + 40 hrs supervised AI + 3 hrs scrum | $9,750/mo | $8,775/mo |
| Scale | 35 hrs senior + 70 hrs supervised AI + 5 hrs scrum | $17,050/mo | $15,345/mo |
Prefer a Fixed-Scope Project?
Prefer a defined deliverable to ongoing capacity? Alongside the monthly plans, we take on fixed-scope projects — a clear deliverable, quoted as a single project.
- You have a well-defined deliverable with clear boundaries
- You want one quote for the whole project up front
- The work has a fixed end, not an ongoing roadmap
- You're validating an idea before committing to a plan
Get the Custom Software Budget Worksheet
Not sure what your build should cost or which plan fits? This worksheet walks you through what actually drives software cost, how to scope your project, and how to match it to a monthly plan — so you can set a realistic budget before you talk to anyone.
Custom Software Pricing: Frequently Asked Questions
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How does custom software development pricing work at QOS Software?
At QOS Software, custom software development is priced as a monthly subscription: each plan bundles a set amount of weekly senior-developer and supervised AI development capacity for one flat monthly fee, starting at $4,875/mo for the Build plan. You can pay month-to-month or commit to 12 months and save 10%, you can move up or down a plan as your needs change, and you own all the code. A fixed-scope project option is available when you'd rather buy a defined deliverable than ongoing capacity.
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What is an AI-junior developer — is my software written by AI?
An AI-junior developer is supervised AI development capacity that handles junior-level coding work under a senior developer's direction — it is not your software being handed to an AI to write on its own. A senior developer specs each task, the AI drafts it, and the senior reviews every line before anything ships, so the AI accelerates delivery without your build resting on inexperienced hands. If instead you want a standalone AI product, agent, or automation, that's our sister company QOS Agentic (qosagentic.com), not custom software development.
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Should I choose a monthly plan or a fixed-scope project?
Choose a monthly plan when you have an evolving roadmap and want steady development capacity you can scale up or down; choose a fixed-scope project when you have a well-defined deliverable with clear boundaries and want one quote for it. Monthly plans start at $4,875/mo and bill either month-to-month or on a 12-month commitment; fixed-scope work is quoted per project. If you're not sure which fits, book a scoping call and we'll tell you honestly.
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What if I need more or less development capacity?
You can move between the Build, Grow, and Scale plans as your needs change — step up when a launch is close and more work is in flight, and step down when things settle. Capacity is billed monthly, so there's no penalty for right-sizing; month-to-month plans keep you flexible, while a 12-month commitment trades some of that flexibility for 10% off.
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Do I own the code you build?
Yes. You own all of the code, data, and intellectual property QOS Software builds for you, on every plan and from day one — there is no lock-in that keeps your software hostage to us. Ownership is part of what's included in each monthly plan, not an add-on you have to negotiate for.
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How much does custom software development cost?
Custom software development at QOS Software costs from $4,875/mo for the Build plan, $9,750/mo for Grow, and $17,050/mo for Scale — each a flat monthly fee bundling weekly senior-developer and supervised AI development capacity. Commit to 12 months and each price drops 10%. These are founding-client launch rates, introductory while we onboard our first clients, so they will rise after the founding window. Prefer a defined deliverable? Fixed-scope projects are quoted individually.
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Which AI model do you use — can I request ChatGPT or Claude?
Every plan runs on QOS Software's standard AI development model, included at no extra cost. If you need a specific model such as ChatGPT or Claude powering the supervised AI development work, that's available on request at additional cost — just ask and we'll quote it. This is the model behind our supervised AI development capacity, not an AI product we sell; standalone AI systems are our sister company QOS Agentic.