TL;DR: A software project brief gets accurate quotes when it describes the work instead of the product vision. Name the people who will use it and the one job each of them needs to get done, list every system it has to talk to, say where it has to run, state how bad a failure would be, and write down the constraints you already know: budget range, deadline and who owns what after launch. Leave out feature wishlists, screen-by-screen designs and technology choices unless you have a real reason. A two-page brief that answers those questions will get you quotes you can compare. A twenty-page brief that doesn't will get you numbers that are mostly guesses.
When three studios quote the same project and the numbers come back at 3x apart, the usual reaction is to assume someone is overcharging. Usually nobody is. Each team read the brief, hit the questions it did not answer, and filled the gaps with their own assumptions. One assumed a web app, one assumed iOS and Android, one assumed the payments integration was already built. The quotes are not for the same project because the brief did not describe one project.
We read a lot of briefs, and the ones that turn into accurate estimates share a shape. Here it is.
What a brief is actually for
A brief has one job: let a team that has never met you estimate the work with the fewest possible assumptions. That is a narrower job than most briefs attempt. It is not a pitch deck, a requirements specification or a design document. It does not need to convince anyone the idea is good, and it does not need to specify every button.
What it needs to do is pin down the handful of things that move a price the most. In our experience those are almost never the features themselves. They are how many kinds of users there are, how many outside systems are involved, which platforms it runs on and how reliable it has to be. We break those drivers down in more detail in what an MVP costs, and a good brief answers each of them before anyone asks.
The seven sections that matter
1. The problem, in one paragraph
Start with what is broken today and who feels it. "Our dispatchers re-type every job from email into three systems and it takes two hours a day" is a better opening than "a next-generation operations platform". The first gives a team something to measure the build against. The second gives them nothing.
Include the current workaround too: the spreadsheet, the manual process, the tool you are replacing. It shows what people actually do.
2. Users and the one job each of them has
List every distinct type of person who will use the software, and for each one, the single most important thing they need to do. Customers, staff, admins, partners, whoever it is.
This is the section that moves estimates the most, and it is the one most often skipped. Every user type is roughly its own set of screens, permissions and edge cases. A product with one kind of user and a product with four is not the same size project with a few extra pages; it can easily be two or three times the work. If your brief says "users" without saying which ones, every quote will guess, and they will guess differently.
3. Every system it has to talk to
Payment providers, your CRM, an accounting package, a phone system, a warehouse database from 2009, a partner's API, hardware on a factory floor. List all of them, and for each one say whether it has documentation and whether you have access.
Integrations are where estimates go wrong most often, because the effort depends on the other side. A well-documented modern API can take days. A system with no API, where the only way in is a nightly CSV export, can take weeks. On a product like Fyuel, an accounting platform for the fuel trade, the connections to ledgers, banks and reports are a large part of what makes the system useful, and a large part of the work. We wrote a whole piece on software integration projects because this is where so much budget quietly goes.
If you are replacing or connecting to an older system, say so explicitly. Legacy modernization is a different kind of project from a greenfield build and should be quoted as one.
4. Where it has to run
Web browser, iPhone, Android, desktop, a VR headset, an embedded device. Be specific, and say whether all of them are needed at launch or some can follow.
Also say where it gets used. Warehouses and job sites with bad signal need offline-first design, which changes the architecture. An app that has to record an hour of audio in the background, like LectureNotes AI does with lectures, is a different build from one that only works while open. If you have a view on native vs cross-platform, share it, but share the reason too.
5. How bad a failure would be
This is the reliability bar, and it is rarely written down. A brief should say what happens if the software is down for an hour, or gets a number wrong. An internal dashboard that is briefly unavailable is an inconvenience. A system that moves money, handles health data or runs a physical device people interact with, the way the Raqts wall responds to real racquet hits, needs more testing, monitoring and redundancy, and it costs more for good reason.
Mention any compliance you already know applies: HIPAA, GDPR, PCI, SOC 2, industry rules. A team that learns about compliance halfway through will have to rebuild parts of what they already shipped.
6. Constraints you already know
Put down the facts that will shape the project whether or not anyone plans for them:
- Budget range. Many buyers hold this back, hoping to avoid anchoring. It usually backfires. Without a range, a team cannot tell you what the best version for your money looks like; they can only quote the version they imagined. A range lets them propose a scope that fits.
- Deadline, and why. "Before the trade show on March 3" is a real constraint. "As soon as possible" is not. If the date is fixed, the scope has to flex, and saying so up front lets teams plan for it.
- Existing assets. Designs, a brand system, an existing codebase, data you will migrate. If there is existing code, say what state it is in, even if the honest answer is "we don't know".
- Who owns it after launch. Will your team maintain it, will the studio, or is that undecided? This changes how the code gets documented and handed over. It is worth reading up on software ownership and handover before you send a brief, not after you sign.
7. What success looks like in 90 days
One or two measurable outcomes. "Dispatchers spend under 20 minutes a day on job entry." "500 paying users." "The pilot site uses it for every shift." This tells a team what to protect when scope has to be cut, which it always does.
What to leave out
Some things make a brief longer without making the quotes more accurate.
Long feature wishlists. Fifty bullet points with equal weight tell a team nothing about what matters. If you have a list, split it into "must have at launch" and "later", and keep the first half short. Every product we have shipped that went out quickly did so because the launch list was ruthless; that is most of what we describe in our ship-in-days playbook.
Detailed screen designs, unless they are final. Rough sketches of the main flow help. Pixel-perfect mockups that have not been tested with users tend to lock in decisions before anyone knows if they are right, and teams will quote to the mockups.
Technology choices without a reason. "It must be built in React Native" is fine if your team knows React Native and will maintain it. If it came from an article, say what you care about (speed, maintainability, hiring) and let the teams propose. Their proposal is part of what you are evaluating.
How to use the quotes you get back
A good brief does not guarantee identical quotes, and that is fine. Differences you can explain are useful. When the numbers come back, read the assumptions, not just the total.
A trustworthy quote will tell you what it included, what it left out, what it assumed about the integrations and the riskiest parts, and what would change the number. If a quote comes back without questions or stated assumptions, that is a warning sign, not a sign of confidence. If one team asks about something no one else did, it may be the only team that read the brief closely.
Also compare how each team proposes to reduce risk. The best proposals put the hardest, least certain part first, whether that is an old integration, a hardware connection or an AI feature whose accuracy is unknown, so that if the estimate is wrong you find out in week two rather than month four.
And if a studio tells you that part of your brief should not be built, or could be bought, listen. Sometimes the honest answer is that an existing product covers 80% of the need; we lay out that decision in build vs buy for vertical SaaS.
A one-page template
If you want a starting point, this covers the essentials:
- Problem: What is broken today, who feels it, how they work around it now.
- Users: Each type of user, and the one job each needs done.
- Integrations: Every system involved, with documentation and access status.
- Platforms and environment: Where it runs, where it is used, what is needed at launch.
- Reliability and compliance: What a failure costs, and which rules apply.
- Constraints: Budget range, deadline and reason, existing assets, post-launch ownership.
- Success: One or two outcomes you will measure at 90 days.
Most good briefs we see fit on two pages.
The bottom line
The quality of a quote is capped by the quality of the brief. Describe the users, the integrations, the platforms, the reliability bar and your real constraints, and leave the product vision for the first meeting. You will get estimates that are closer together, easier to compare and much less likely to double halfway through. We have scoped work ranging from the Geonode SDKs to consumer apps like Lifemaxxing AI and XR builds for ARCortex, and the briefs that led to smooth projects all answered these questions first. If you are building something immersive, the same logic applies, with a few extra questions we cover in what an XR app costs.
Have a brief, or half of one? Book a demo and bring it along. We'll tell you which assumptions would move the estimate most, and send back a clear plan and timeline, usually within a day. See our work: Fyuel, LectureNotes AI, Raqts, ARCortex and more.