A specialist for a clear brief.
Useful when you know exactly what needs building. You usually own the brief, coordination and product decisions.
Launch your product. Simplify your work. · Goa, India
Your idea.
Shipped in ten days.
We work with 600+ founders a year at build3. We bring what we’ve learned to building your first product.
Build with us in Goa. Three days to agree what to build. Seven to build and test it.
₹50,000 + agreed equity or revenue share · You own the code and accounts
01 / Why we built Build by FridayFrom our work with founders at build3
Find out what
customers want.
600+
founders we work with
each year at build3
A product can work perfectly and still be something nobody wants.
We work with 600+ founders a year at build3. We see ideas stall while founders look for a developer, hire a team or try to build everything at once.
Build by Friday gets that first product built. We help you choose what matters, build it with you, and get it ready for customers to try.
You can start testing demand, asking for feedback and finding your first paying customers.
Meet the people behind Build by Friday02 / Choosing your first buildThe four ways people usually get a first version built
Who should
build it?
It depends on your budget, your time and how much you already know about the product.
A team for a larger scope.
A good fit for a defined project with a larger budget. Before you commit, clarify who owns product decisions and how quickly you can test with users. One founder we met was quoted ₹4 to 6 lakh for a first version of a comparable product.
An investment for the long run.
Build an in-house team when you need ongoing capacity. Recruiting and salaries are a bigger commitment while you are still testing the idea.
Fast tools. Your time.
A useful route if you have the time to build and learn. Scope, testing, security and maintenance still need someone to own them.
Build directly
with our team.
You work directly with the person building your product. A second team member tests it before handover.
We decide what to build together. You try it as we go and keep the code and accounts.
The people you’ll build withThe important part is choosing.We define the product
We define the product
before we build it.
We start with who it’s for and what they need to do. Together, we choose the features for the first version and write down how we’ll test them. Then we build.
A useful starting pointOne page.
One page.
Before a line of code.
See how a clear brief turns a broad idea into a buildable first version.
03 / From brief to handoverAbout ten working days · dates agreed with you
Three days to decide.
Seven days to build.
The build takes seven days once the scope is locked. Deciding what to build happens before that, and it is where most projects are won or lost.
DefineDays 1 to 3
- Day 1
Brief and discovery call
You complete the project brief. We talk through fit: yes, a narrower first version, or an honest no.
- Day 2
Your product brief, our template
A first advance is paid. You write the basic brief using our template and short video guide. No technical language needed.
- Day 3
Working session and team brainstorm
Two to three hours with your lead to fix screens, flow, data and technical choices. The whole team weighs in once. Scope is locked in writing.
BuildDays 4 to 10
- Day 4
Kickoff and setup
Accounts, repository, deployment and the skeleton of the product, in your name from the start.
- Days 5 and 6
The core journey
The one flow that matters gets built first. You try it daily and answer questions as they come up.
- Day 7
Structured review
A second team member tests the agreed flow with fresh eyes. We fix and adjust before adding anything else.
- Days 8 and 9
Edges and integrations
Errors, empty states, permissions, the connections you need, and deployment preparation.
- Day 10
Acceptance test and handover
We walk the acceptance checklist together, then transfer code, access and documentation. The engagement closes.
- After
Yours to continue
Take it forward yourself, with another team, or book a separate Powerup with us. No lingering support queue.
Calendar days depend on your availability and travel. Build days are consecutive once they start.One lead per project. One project at a time for that lead.
Why Goa?Fewer handoffs.
Fewer handoffs.
More time at the same table.
Our core format is an onsite sprint. When a question about your business comes up, the person who knows the answer is in the room, so the product gets better every day instead of every fortnight. If Goa is difficult, tell us before committing and we’ll discuss options.
Travel and accommodation are separate.04 / The commitmentAgreed scope · visible costs · a clear end
One agreed first version,
priced before we start.
₹50,000
Base cash fee for one agreed first version, plus an upside you propose: equity or revenue share, agreed together after discovery.
₹25,000Before product definition begins
₹25,000After scope is locked, before build day one
One accountable lead per sprint. Scope and availability agreed before you commit.
What you leave with
- A written scope and acceptance checklist
- A working first version of the agreed flow, deployed
- Product design, development and testing by a named lead
- An independent review before handover
- Source code, deployment access and documentation in your accounts
Applicable taxes, third-party costs and the upside arrangement are confirmed in writing before you commit.
Make us an offer
You propose the upside.
Alongside the ₹50,000 base fee, propose equity or revenue share that makes sense for your company. There is no fixed percentage. We discuss the idea, the scope and your offer after discovery, and agree the full arrangement in writing before you commit.
After the first build
Further features, fixes and maintenance are bought as a Powerup: a separate build day or sprint with its own start and end, quoted before work begins. You can also take the code to any other team. Enterprise scale and unlimited support are not part of the first build.
05 / The people behind the sprintFounders, operators and builders · one team, shared ownership
Meet your
build team.
Researchers, product builders and founders, working together at build3 in Goa.
Companies founded, products shipped to paying customers, and 25 years of building education businesses.
Our stories and credentials
Arjun
Products & Investments, build3 · Applied AI Researcher, Department of Atomic Energy (DAE)
Arvind
AI agents & web products · 25+ years building businesses
Shashwat
Founder’s Office, build3 · Ex-AI Analyst, SquadStack
Kaustubh
Products & GTM, build3
Varun
Founder, build3 · Co-founder, 91springboard · ex-Goldman Sachs
Can you really build my idea in seven days?
Only if we can agree a first version that fits. We review your brief before accepting the project, and the actual dates are agreed with you. A large roadmap usually needs a smaller first step. If it can’t produce something useful in a week, we say so instead of stretching the promise.
Do I need to be technical, or write a technical brief?
No. You need to explain who will use it and what they need to do. We give you a template and a short video, then work through screens, data and technical choices with you in a working session before building.
Is the result ready for customers, or just a mockup?
A working, deployed first version of the agreed flow, tested against a checklist we write together: the flows, the devices and browsers, the expected number of users, and the known limits. It is built to be used and learned from, not to promise enterprise scale.
What if something breaks after handover?
Before the sprint, we agree in writing what counts as a defect against the acceptance checklist and how it is handled. New features and further work are scoped and priced separately as a Powerup. You always keep the code and accounts, so you are never locked in.
How much equity or revenue share do you take?
There is no fixed percentage. After discovery you propose what feels fair for your company and stage, and we decide whether to take the project on. The ₹50,000 base fee is separate and standard.
Do I have to come to Goa?
Onsite is our preferred format because it removes waiting and produces a better product. If it is genuinely difficult, raise it before committing and we will discuss a workable arrangement. Travel and stay are not included.
Start with the projectNo technical pitch required
What would you
like built?
Tell us who it’s for, what the first version must do and where you’re starting. We read every brief and reply with a straight answer: yes, a narrower first step, or not a fit.
Start your project briefAllow 10 to 15 minutes. Opens our intake form in a new tab. A rough idea is a good place to start.
Project briefDiscovery callScope & offerSeven build daysHandover