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Product design for complex, data-heavy software.

Flatstudio is a product design and engineering studio based in Lisbon. Since 2014, we design, build, and evolve complex, data-heavy digital products for iGaming, sports analytics, fintech, and B2B SaaS – and have worked in GovTech and MedTech. One team covers product logic, design systems, brand, and frontend engineering. 

Recent results: Outlier reached a 20% paid conversion rate within six weeks of launch with zero paid advertising. Mollybet grew active traders by 37% after a full redesign of its trading terminal. RG secured 70+ media partnerships on a platform we built from scratch.

We sign an NDA before any conversation about your product. You retain full commercial ownership of every asset – source files, design systems, and code – on final payment.

  • Min project size
    $25,000+
  • Hourly rate
    $100 - $149 / hr
  • Employees
    10 - 49
  • Locations
    Lisboa, Portugal
  • Year founded
    Founded 2014
  • Languages

4 Languages that we service

  • English
  • Portuguese
  • Ukrainian
  • Russian

1 Locations

  • Lisboa , Portugal

Select Focus Area
Application Platforms
Other app platform
100%
CMS Focus
Frameworks and CMS
Other frameworks and CMS
46%
Product Design Focus
Programming & Scripting
C#
5%
HTML5
5%
Python
5%
Ruby
5%
Typescript
5%
XML
5%
User Experience Focus
Industries
Gambling
30%
Sports
30%
Financial services
10%
Medical
10%
Government
5%
Media
5%
Real estate
5%
Supply Chain, Logistics, and Transport
5%
Clients
Midmarket ($10M - $1B)
45%
Small Business (<$10M)
45%
Enterprise (>$1B)
10%

Pricing Snapshot

Min. project size $25,000+
Avg. hourly rate $100 - $149 /hr
Rating for cost 4.8 /5

What Clients Have Said

Flatstudio is praised for offering good value for cost, fitting clients' budgets while maintaining high-quality work. Specific project costs include $65,000 for a mobile app design. Clients appreciate timely delivery and effective communication throughout their engagements.

This summary is based on verified Clutch reviews.

Most Common Project Size

$50,000 - $199,999 based on 4 reviews
< $10,000 $10,000 - $49,999 $50,000 - $199,999 > $200,000

Select a service to see pricing information

Flatstudio Review Insights

Overall Review Rating

4.9
  • Quality 4.9
  • Schedule 4.9
  • Cost 4.8
  • Willing to Refer 4.9

Top Mentions

Review Highlights

  • High-Quality Deliverables

    Flatstudio consistently delivers high-quality work that often requires minimal revisions. Clients are impressed with the engineering-ready designs and the aesthetic appeal of the final products.

  • Impressive Industry-Specific Knowledge

    Flatstudio's focus on industries like sports betting has garnered praise for their understanding of user psychology and industry-specific challenges, which adds significant value to their services.

  • Strong UX/UI Design Expertise

    Clients consistently praise Flatstudio for their exceptional UX/UI design skills, which have led to improved user engagement, satisfaction, and conversion rates in various projects across different industries.

  • Initial Communication Challenges

    Some clients initially experienced minor friction in communication and trust-building, but these issues were resolved over time, leading to improved collaboration and project outcomes.

  • Successful Branding and Design Systems

    Flatstudio has successfully developed comprehensive branding and design systems that align with client missions and values, resulting in enhanced brand recognition and media relationships.

  • Ability to Innovate from Scratch

    Flatstudio is adept at working in undefined spaces, creating products from scratch with limited initial requirements. This ability to innovate has been highlighted as a significant strength by clients.

Flatstudio Reviews

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Mobile App Dev & UX/UI Design for Betting Software Company

  • Mobile App Development UX/UI Design
  • Prototype Design UX Strategy
  • Confidential
  • June 2024 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Their focus on the sports betting industry and best-in-class UX/UI design are impressive."

Sep 10, 2024
Head of Product, Betting Software Company
Anonymous
Verified
  • Other industries
  • New York City, New York
  • 11-50 Employees
  • Online Review
  • Verified

Flatstudio has developed a new module and a homepage for a betting software company's mobile app. The team is also responsible for the app's UX/UI design and onboarding process.

UX/UI Design & Branding for Sports Betting Analytics Co

  • Branding UX/UI Design Web Design Web Development
  • Usability Testing User Research UX Strategy WordPress CMS Brand messaging Brand strategy Product branding Corporate identity
  • $50,000 to $199,999
  • May 2022 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

“Our partnership has grown as Flatstudio continues to prove to be really effective for us.”

Feb 10, 2023
Co-Founder & CTO, Outlier
Luis Lafer-Sousa
Verified
  • Gambling
  • New Orleans, Louisiana
  • 11-50 Employees
  • Phone Interview
  • Verified

Flatstudio has executed mobile and web UX/UI design and brand design for a sports betting analytics company. They’ve designed a mobile and web app, a visual identity and brand book, and two websites.

 

UX/UI Design for Prediction Market Products Company

  • UX/UI Design
  • User Research UX Strategy
  • Confidential
  • Aug. 2025 - Jan. 2026
4.5
Quality
4.5
Schedule
4.5
Cost
4.5
Willing to Refer
4.5

"I was impressed by Flatstudio's ability to work in a white space environment to create a new product from scratch."

Feb 5, 2026
Head of Product, Prediction Market Products Company
Anonymous
Verified
  • Gambling
  • Las Vegas, Nevada
  • 1-10 Employees
  • Online Review
  • Verified

Flatstudio provided UX/UI design services for a prediction market products company's MVP. The team created wireframes and high-fidelity designs for all core screens and produced a design system for future use.

Branding & Web Design for Media Platform

  • Branding Graphic Design Product Design
  • Prototype Design Presentation Design
  • Confidential
  • Jan. 2023 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"The communication was transparent and timely."

Sep 6, 2024
CEO, Responsible Gambling
Anastasia Subotina
Verified
  • Gambling
  • Delaware, New Jersey
  • 11-50 Employees
  • Online Review
  • Verified

Flatstudio has designed and created the branding and website of a media platform. Requirements include a design reflecting the client's mission and values and a comprehensive branding and design system.

UI/UX Design for Online Sports Platform

  • Custom Software Development
  • $50,000 to $199,999
  • June 2017 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
4.5
Willing to Refer
5.0

"We are also grateful for their readiness to dive deep into our project in order to better understand it."

Dec 28, 2022
Product Owner, Scores24
Sergei Savlov
  • Other industries
  • Saint Petersburg, Russia
  • 11-50 Employees
  • Online Review

Flatstudio was hired by an online sports platform to design the UI/UX of their platform. They were hired for this project based on a referral.

Mobile App & Marketing Materials for Tipster Social Network

  • Custom Software Development Mobile App Development UX/UI Design
  • $1,000,000 to $9,999,999
  • Jan. 2018 - Ongoing
5.0
Quality
5.0
Schedule
4.5
Cost
4.5
Willing to Refer
5.0

"Flatstudio is always very affable and deeply interested in success of our project."

Dec 16, 2022
CEO, Stavka TV
Viktor Titov
  • Gambling
  • Moscow, Russia
  • 51-200 Employees
  • Online Review

Flatstudio is developing a tipster social network's mobile app and promo materials. They use Abstract and Figma to develop their design after choosing between multiple options.

Showing 1-7 of 7 Reviews

Verified means Clutch independently confirmed Flatstudio is a legally registered business and backed by 5 verified client reviews averaging 4.9 stars.

Learn More
Verified Client Reviews
5
Overall Review Rating
4.9
Source
Clutch
Last Updated
September 18, 2026

Business Entity

Business Entity Name Flatstudio LDA
Source República Portuguesa
Jurisdiction of Formation Portugal
Date of Formation November 7, 2016
Status Active
Last Updated September 12, 2026
ID 514168030

Credit Report Results

International Credit Risk Assessment Not Rated
Source Creditsafe
Last Updated September 16, 2026

*Clutch performed additional verification on this company and confirmed that there are no negative legal filings or large outstanding debts. This company has also received 3 or more verified reviews on our platform.

Learn More About The Clutch Verification Process

Locations (1)

R. Vigías 2, Piso 0/C, Parque das Nações, LisboaPortugal 1990-506

16 - 20

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