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Design Sprints and Rapid Prototyping that put evidence in place of an argument.

A design sprint is a fixed window that takes an idea from concept to a tested prototype, so the decision to build gets made on evidence rather than on argument.

  • 120+Projects delivered across 12 countries since 2012
  • 100+Senior in-house engineers, six countries
  • 5.0Unified rating across 61 client reviews on Clutch
  • 2 to 4 weeksTypical time from signature to start
  • ISO 27001Certified security practice, audited by Quay Audit UK

01Overview

What a design sprint is for

A design sprint answers one question: is this idea worth building? It is for a product or feature that does not exist yet, where the argument has outlasted the evidence for it. unicrew runs the whole thing inside one window whose end date is agreed before anything begins, because a deadline is what forces an idea down to the one thing worth testing.

  • A decision, not a deliverableYou get go, pivot, or stop with the evidence under it. If you want working software at the end of the window, you want a build.
  • No grey boxesPrototypes are built on your own copy, data and flows, then put in front of people from your audience rather than colleagues who already know the answer.
  • One assumption, named firstThe single belief the idea dies without gets written down next to the decision it feeds. Everything else stays untested on purpose.
  • The honest routingA live product that underperforms wants a UX audit; a decision already made wants product design and development. We say which on the first call.

02Proof

Why unicrew for design sprints

Prototypes are the easiest thing in this business to show and the hardest to check: nothing in a screenshot says whether the idea behind it was ever built, or used. So each of the three below rests on a client's own public review, or on an external audit.

  • EZ-SQR arrived with a description and nothing elseEZ-SQR, a security startup in Florida, had one written description of an idea and nothing else. Its owner told Clutch: "we only had a description of my idea to go off of". COVID-19 later halted the project short of a launched product. What he had by then was a demo he could put in front of people, and their reaction was positive.
    A demobuilt out of one written description, and shown to real people while the idea was still an idea
  • We design for adoption, not for the demoA prototype that impresses a boardroom and dies in the field has failed. For a research group at RWTH Aachen University we replaced spreadsheets with a deliberately light time-tracking tool, because the real requirement was that nobody would quietly stop using it.
    ~40%more project leaders tracking their team's time at RWTH Aachen, instead of guessing or delegating it
  • Your unreleased idea stays confidentialSprints happen before anything is public, so the thing exposed is the idea itself. The people prototyping it are unicrew employees rather than subcontractors we introduce to your product, working across Ukraine, Poland, Estonia and the UK.
    ISO 27001:2022 and ISO 9001:2015, renewed through a multi-stage audit with Quay Audit UK

03Compare

Sprint with us, sprint in-house, or skip straight to the build?

What picks between these three is not budget. It is whether a decision is genuinely blocked, and whether the person who can unblock it will sit in the sessions. One answer the table leaves out is research without a prototype: reasonable when you are exploring a market rather than a product, though people answer questions about a hypothetical politely and react honestly only to something they can click. Where the open risk is technical rather than human, technology advisory is the branch.

A design sprint with usunicrew A sprint your own team runsIn-house Skip validation, build the MVPBuild
Best forAn idea nobody has built yet, where the open question is whether anyone wants it and the team prototyping it can also cost and build it. Best forYou have a designer, a researcher and a facilitator who can drop everything for the window, plus access to real users. Best forA small build, a domain you know cold, or a risk that is technical rather than human.
Trade-offYou are buying a decision, not software. If you already know what to build, this is a detour, and we say so rather than sell you the window. Trade-offNeutrality is the hard part: the people who own the idea rarely run the test that could kill it. Trade-offYou meet the flaw in month four instead of the first fortnight, and by then it is in code, in a roadmap, and in a budget.
You end up owningA clickable prototype, the sessions behind the verdict, and a scoped read on what building it would take. You end up owningThe findings, and the job of turning them into an estimate. You end up owningWorking software, and whichever assumption you did not test, now expensive to change.

Quick self-check

Tick what is true. The verdict changes as you go, including to the one that tells you not to buy a sprint.

0 of 4 true

Go and build it

You ticked nothing, and that is an answer. A decision already made cannot be improved by a sprint, only confirmed, and confirmation is the most expensive thing to buy at this stage.

Tell us anyway

One tick, and it may not be a sprint problem

A single symptom is often a meeting that keeps running out of time rather than a genuine unknown. Worth thirty minutes before you buy a window from anyone, including us.

Talk it through

Worth costing as a sprint

Two ticks, and what sits behind them is usually an argument about evidence nobody has collected rather than an argument about taste. Framing is where we would start: which assumption the idea dies without, and what a prototype would have to show to settle it.

Book a discovery call

A sprint fits

Three ticks. What is left to settle is who sits in the sessions and what they are allowed to decide at the end, because that is what turns findings into a decision rather than another meeting.

Book a discovery call

A sprint, and book the decision-maker first

All four. This is the profile the format exists for: nothing built, a real disagreement, and someone who can end it in the room. Most engagements start within two to four weeks.

Talk about the sprint

A sprint is worth running when a decision is stuck between two people who both have a case. It is a waste when everyone already agrees and only wants the prototype, because then you are paying sprint prices for a design task.

Oleksandr TrofimovChief Technology Officer, unicrew

04Capabilities

What you get

Seven pieces of work, run in one window. You can buy the whole sprint or the part you are actually missing.

  • Design sprint facilitation

    We pin down the single belief the idea dies without and turn it into a question a prototype can answer. A sprint that tests everything tests nothing, so this stage decides what we will deliberately leave untested.

  • Rapid prototyping

    No grey boxes, no lorem ipsum. We prototype with your actual copy, data and flows, because users react honestly to things that feel real and politely to things that do not.

  • Concept validation and user testing

    Concept validation with real users

    What they do, not what they say

    We put the prototype in front of the people who would use it and watch what they do, not what they say, so the objection surfaces before the market finds it.

  • Build scoping and estimation

    Sprint to scope

    Scope, sequencing, risks

    The sprint ends with a grounded answer to the question you actually have: what it would take to build this for real. For a German startup at a very early stage, that scope became a research tool with one-click Chrome capture; the client took the MVP into testing with potential users, and a second phase kicked off a couple of months later.

  • Rapid wireframe iteration

    Wireframes are the conversation, not the artwork. We iterate layouts and interaction logic in low fidelity first, because a week disappears fast once the argument moves to colour. The visual language and the component set that outlive a prototype are a separate piece of work.

  • Mobile app prototyping

    Phone-first ideas get prototyped and tested on a phone, in the hand, not clicked through on a laptop. A concept that reads as real on a six-inch screen is a different artefact from one that reads as real on a monitor, and that gap is where phone ideas usually fail their first test.

  • Prototype to production handoff

    Prototype to build, no handoff cliff

    The prototype becomes the brief

    The people who prototype at unicrew sit next to the people who build, so if the decision is go, the prototype becomes the brief rather than a PDF that gets reinterpreted.

05Stack

What sprints run on, and what they hand off into

None of these is what the prototype is made of. A prototype is clickable and deliberately disposable, so this is the method the testing runs under and the stack a go decision lands on. Nielsen heuristics is a research technique, not a framework.

FrontendWhat your users touch
BackendServices, APIs, and business logic
PracticeHow the work is checked

06Engagement

How you engage us on a sprint

Three shapes, and there is no minimum engagement period. What changes between them is how much you commit before you have watched real people use a prototype, and who owns the product once the decision is made.

  • A fixed-window sprint

    Start here

    One agreed window, one assumption under test, and a build, pivot, or stop recommendation at the end. The length is settled with you before anything begins, and it does not move once the sessions start.

    Best when
    Nothing is built yet and a go or no-go decision is blocked
    You pay
    Outcome based, quoted per project
    Typical start
    Two to four weeks
  • Sprint, then build

    Straight through

    The window runs first, and if the answer is build, the same people carry the prototype into the product. Nothing is reinterpreted across a handoff, because there is no handoff.

    Best when
    You want one team accountable from idea to release
    You pay
    Billed hourly, quoted per project
    Typical start
    Two to four weeks
  • A senior designer or researcher who embeds with your team and keeps prototyping and testing as the roadmap moves, instead of running one window and leaving.

    Best when
    Validation is continuous rather than a single decision
    You pay
    Billed monthly, per team member
    Typical start
    Two to four weeks
A sprint that already ran

We will read the findings first, and the next window is a separate decision

If a sprint has already happened and the result did not settle the argument, we read the prototype and the session notes first and tell you what they support and what they do not, which is sometimes that no second window is needed. Where the product is live and the real question is why people drop off, that is a UX audit rather than a sprint.

07Industries

Industries we prototype for

We prototype in the sectors we already build in, so the window does not spend its first day learning your domain. That matters when an idea has rules attached to it: scheduling constraints, curricula, or patient data. These are the verticals where we have shipped the product that sits behind a prototype.

Deepest expertise

Logistics and transportation

A quoting screen or a dispatch board is prototyped against a day that is already half-booked, never against an empty state, which is where most concepts here fall over. We build in this sector, including a national US moving company's order platform.

Deepest expertise

Hospitality and leisure

Availability is the thing to test, and it is rarely just about who is free. On one salon booking product the rule that mattered was equipment: two free therapists still cannot both use one diamond-peel machine.

EdTech and learning

A concept here has to hold for a first-time student and for the person administering a cohort of them, and those two sessions rarely agree. We took one online test-prep platform over from a previous vendor, and its COO reported a greatly improved customer experience.

E-commerce

The prototype is easy and the catalogue behind it is not, so a checkout concept gets tested against real stock and real prices or it tests nothing. We replatformed a European manufacturer of scented products onto Shopify and wired it to a Microsoft Dynamics ERP through a custom middleware app.

Healthcare

Recruiting test users is harder here, and the sessions have rules attached, so we frame what may be shown before anyone books one. We stabilized, redesigned and extended a US consumer health monitoring platform.

Warehouse management

App estates where a new idea has to fit alongside the ones already running, like an app store of warehouse-management applications scaling from start-ups to 4PL operators. Mocking up a module there means mocking it up against its neighbours.

Name the assumption you are not ready to bet a build budget on

Tell us the idea you are not sure about. A design sprint is the cheapest honest answer you can buy.

Let's talk

What happens after you contact us

  1. We reply within one business dayThe reply answers the idea you described, and where a sprint is the wrong purchase for it, that is what the reply says.
  2. A call about the decision, not a pitchWhat the idea is, what you are unsure about, and who has to sign off.
  3. The assumption under test, in writingThe single belief the idea dies without, next to the decision it feeds. That document is what the window is aimed at.
  4. A fixed window, then a start dateWe agree the length of the window, and then a date to open it. Most engagements start within two to four weeks.

08Delivery

How a design sprint works

Five stages inside one window agreed before anything starts. From your side it needs one real decision-maker plus a few hours from whoever knows the domain and the customer best.

  1. Frame the questionWe pin down the riskiest assumption and turn it into a question a prototype can answer. This stage needs your decision-maker in the room, because what gets tested decides what the sprint can conclude.You getThe single assumption under test, written down, next to the decision it feeds.
  2. Map the flow, then sketch itWe map the path a user would take end to end, then agree with you which slice is worth prototyping, before anyone opens a design tool. Paper is faster to throw away, and things get thrown away here. Your side signs off that slice and nothing else at this stage, because a flow nobody agreed to gets re-argued at the findings.You getA storyboard of the exact flow the prototype will cover, agreed with you.
  3. PrototypeWe build a clickable prototype on real content, realistic enough that test users forget it is fake. Your side supplies the copy and sample data that makes it convincing.You getA clickable prototype built on your own copy, data, and flows.
  4. Test with real usersStructured sessions with people from your actual audience: we watch where they hesitate, where they light up, and where they quietly give up. If you can connect us with your own users the sessions get sharper; if not, we recruit.You getSession findings and the pattern across them, not a highlight reel.
  5. Decide: build, pivot, or stopBuild means a scoped plan for the real thing. Pivot means the idea survives but changes shape. Stop means you just saved a build budget. What your side supplies here is the decision itself, made in the room by the person who is allowed to make it.You getA written recommendation, and where it says build, the scope and sequencing to put a budget against.

09Client voices

What clients say

See our client reviews
5.0 unified ratingacross 61 verified client reviewsRead them on Clutch

11Questions

About prototyping and design sprints

Two questions decide whether a sprint is worth buying, and neither is about the method: can you name the assumption the idea dies without, and will the person who can say build or stop be in the room.

A design sprint is a short, structured process that takes an idea from concept to a tested prototype, so you can decide whether to build it before committing a development budget. It compresses problem framing, rapid prototyping and user testing into a fixed window with a decision at the end. The format descends from the Google Ventures five-day sprint, but the mechanics matter less than the outcome: evidence replacing opinion. If you have also been quoted for a discovery phase, separate the two: a discovery phase produces documentation and an estimate for a build that is already assumed, where a sprint is bought to find out whether the build should happen at all and can legitimately end in stop. Where the documentation is the thing you actually need, business analysis and product design and development are where it lives, and we will say so rather than sell you a window.

A decision and the evidence behind it: a clickable prototype built on real content, findings from the user test sessions, and a recommendation to build, pivot, or stop. If the answer is build, that prototype and those findings become the scope for development, and where you want the first version in front of real users on a fixed date, that is an MVP in six weeks. What you do not get is a finished product; a sprint buys the evidence to decide, not software.

The number depends on the sprint, so we scope it with you and quote from that instead of posting a figure that would be wrong for most ideas. Four things drive it: how many flows are in scope, how high the fidelity has to go before users react to the prototype as real, whether we recruit test participants or you bring your own audience, and whether it covers mobile as well as web. We do not publish a rate. Where a designer embeds with your team instead of running a fixed window, that is team extension, billed monthly per team member.

It is a fixed window, and we agree the length with you before anything starts rather than letting it drift. The same drivers that move the cost move the length: the flows in scope, the fidelity the prototype needs, and whether we recruit test participants for you. What does not change is the shape. A sprint with an open end date stops being a sprint, and one with no decision date is how validation quietly becomes procrastination.

The prototype deliberately fakes the integrations, and the integrations are where the build estimate lives, so we map them while framing rather than discovering them later. A prototype can simulate an ERP lookup in a second; the real one is weeks of work. If your idea has to live inside an existing system, tell us on the first call, because it changes what the sprint has to test.

Real enough that test users react to it as a product, not a drawing. We prototype in clickable form with your actual copy, data, and flows, because honest reactions only come from things that feel real. What it is not is production code: the prototype is deliberately disposable, which is what lets us change it overnight between sessions.

Then the sprint worked. Finding out inside the window that users do not want the thing is the best financial outcome it can produce; the alternative is finding out after months of development. A failed test is rarely a dead idea anyway: more often it kills one assumption and points at a better shape, which is what the pivot outcome is for. Either way you keep the prototype, the reactions, and a record of why the decision went the way it did.

One real decision-maker, and that is the hard requirement: the sprint ends in a build, pivot, or stop call, and a verdict reached without that person gets relitigated later. Beyond that we need a few hours from whoever knows the domain and the customer best, at framing and again at the findings. If you can connect us with real users from your audience, testing gets sharper; if not, we recruit.

Yes, and it is a common case: the product is live, but the next big feature is a bet nobody wants to fund on instinct. The sprint tests the new flow against your existing users, which is a stronger test than a greenfield sprint gets, because those people already have habits to disrupt. One caution: if what you want to know is why current users drop off, that is a UX audit rather than a sprint, and the cheaper answer. We ran exactly that on a school-meal ordering app.

Facilitation, a prototype and a round of testing sit on every full-service vendor's page, including this one, so the comparison that helps you starts underneath that layer. Three questions get you under it without a meeting, and it is fair to aim all three at us. First, links to individual reviews instead of a star rating: the five quotations in the grid above each open the client's own page on Clutch, where you can read what the engagement actually was. Second, who employs the people who will run your test sessions, because that decides whether whoever watched your users is reachable when you come to build; ours are unicrew employees across Ukraine, Poland, Estonia and the UK. Third, what a firm does not hold and not only what it does: we hold ISO 27001:2022 and ISO 9001:2015, audited by Quay Audit UK, and we do not hold SOC 2. If the sprint is a step toward a first release, the same three questions are worth putting to whoever builds it, which our guide to choosing an MVP development company goes through in more detail.

Four situations, and we would rather say so on the first call than three weeks in. When the risk is technical rather than human: if the question is whether this can be built at all, or holds under load, a prototype users click answers nothing, and technology consulting and advisory is where that lives. When nobody on your side can make the call, because a verdict reached without that person gets relitigated later. When you already know what to build: go straight to product design and development. And when you want the prototype to be the product, which it is not; its disposability is what lets us rebuild it overnight between sessions. One more, the awkward one: if you want the sprint to confirm a decision already made, do not run it, because we will report what users did even when that contradicts the brief.

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