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Custom Software Development, Design & Consulting

Who are THEY?
Since our inception in 2017, we've grown into a remote team of experts, spanning from the UK to Poland. We specialise in delivering tailor-made web and mobile applications, with a keen focus on collaboration and direct client-developer interaction.
Our key strength is a consultancy approach to every client.
We've had the privilege of assisting over 55 businesses - from young startups to well-established companies, helping them navigate the technological landscape and achieve their goals. Our success lies in our ability to match each project's unique requirements with the right expertise

  • Min project size
    $5,000+
  • Hourly rate
    $25 - $49 / hr
  • Employees
    10 - 49
  • Locations
    London, England
  • Year founded
    Founded 2017
  • Languages
  • Timezones

2 Languages that we service

  • English
  • Polish

5 Timezones that we service

GMT
Greenwich Mean Time (GMT)
CET
Central European Time (CET)
UTC
Universal Coordinated Time (UTC)
EET
Eastern European Time (EET)
ART
(Arabic) Egypt Standard Time (ART)

2 Locations

  • London , England
  • Kraków , Poland

Select Focus Area
Application Platforms
Amazon Application Development Framework
85%
Azure Platform
10%
Digital and IT Strategy Consulting Focus
IT Operations Management Consulting
50%
Frameworks and CMS
Spring MVC
20%
Other frameworks and CMS
10%
Programming & Scripting
Java
30%
Typescript
15%
SQL
10%
HTML5
5%
Python
5%
Redux
5%
XML
5%
User Experience Focus
Industries
Business services
10%
Consumer products & services
10%
Education
10%
Financial services
10%
GPS, Navigation & GIS
10%
Gambling
10%
Medical
10%
Other industries
10%
Real estate
10%
eCommerce
10%
Clients
Small Business (<$10M)
85%
Midmarket ($10M - $1B)
15%

Pricing Snapshot

Min. project size $5,000+
Avg. hourly rate $25 - $49 /hr
Rating for cost 4.9 /5

What Clients Have Said

THEY.dev offers competitive pricing and strong value for cost, with clients noting their budget-friendly services and effective project management. Projects typically involve 2-5 team members, delivering on time and within budget, enhancing overall client satisfaction.

This summary is based on verified Clutch reviews.

Most Common Project Size

< $10,000 based on 21 reviews
< $10,000 $10,000 - $49,999 $50,000 - $199,999 > $200,000

Select a service to see pricing information

THEY.dev Review Insights

Overall Review Rating

5.0
  • Quality 4.9
  • Schedule 4.9
  • Cost 4.9
  • Willing to Refer 5.0

Top Mentions

Review Highlights

  • Expertise in Multiple Industries

    THEY.dev demonstrates expertise across numerous industries, including SaaS, e-commerce, finance, and medtech. Clients appreciate their ability to provide tailored solutions that meet specific industry needs, such as auditing platforms, e-commerce dashboards, and cloud-based systems.

  • Commitment to Client Success

    THEY.dev is committed to client success, often going beyond the agreed scope to suggest improvements and ensure the best possible outcomes. Clients appreciate their dedication to understanding and solving business challenges.

  • Strong Technical Knowledge

    Clients consistently praise THEY.dev's strong technical knowledge, particularly in web and app development, cloud services, and API integrations. Their ability to deliver high-quality technical solutions is a recurring theme in reviews, with many noting their proficiency in Java, React, and AWS.

  • Value for Money

    Many clients choose THEY.dev for their competitive pricing and the value they deliver. The company is often seen as providing good value for cost, making them an attractive option for businesses with budget constraints.

  • Effective Project Management

    Reviews highlight THEY.dev's effective project management, often characterized by timely deliveries and structured workflows. Clients value their use of tools like Jira and Trello for task management and their ability to keep projects on track.

  • Room for Improvement in Estimation

    While generally positive, some reviews suggest THEY.dev could improve their initial budget estimations. A few clients mentioned projects going over budget, indicating a potential area for refinement in cost forecasting.

THEY.dev Reviews

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Web Platform Dev for SaaS Company

  • Custom Software Development UX/UI Design Web Development
  • AI Strategy
    +12
  • Confidential
  • June 2024 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"We're impressed with the solid expertise across the full tech stack present within the firm."

Oct 12, 2025
Senior Advisor, SaaS Company
Anonymous
Verified
  • Other industries
  • Brussels, Belgium
  • 1-10 Employees
  • Online Review
  • Verified

TH-EY has developed a SaaS firm's web platform. They've designed the UI/UX, built prototypes, created user stories, made an MVP, performed tests, fixed bugs, and supported the client's ISO audit preparation.

Website Revamp & UI/UX Design for Fundraising Platform

  • Custom Software Development UX/UI Design Web Development
  • Automation Testing
    +3
  • Confidential
  • May 2024 - Jan. 2025
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"The team not only delivered scope but made numerous product and technical recommendations throughout the journey."

Nov 28, 2024
Executive, Localgiving
Anonymous
Verified
  • Non-profit
  • London, England
  • 1-10 Employees
  • Online Review
  • Verified

TH-EY took over a fundraising platform's Figma project and set up the platform's donation pages with modern components. They also built the client's AI fundraising toolkit and updated their marketing websites.

Branding & App Dev for Software Company

  • Branding Mobile App Development UX/UI Design
  • Confidential
  • June - Oct. 2024
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Everything was delivered on time and within the budget."

Oct 18, 2024
Executive, Auditstage
Anonymous
Verified
  • Other industries
  • Belgium
  • 1-10 Employees
  • Online Review
  • Verified

TH-EY developed a clickable app prototype for a software company. The tasks also included branding, logo design, and development estimation.

Web App Dev for AML Platform Provider

  • Custom Software Development Web Development
  • Confidential
  • Feb. 2023 - Feb. 2024
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"We were impressed with their prompt delivery and understanding of the challenges being faced."

Feb 19, 2024
Director, Enforcio.io Ltd
Anonymous
Verified
  • Other industries
  • United Kingdom
  • 1-10 Employees
  • Online Review
  • Verified

TH-EY built an AML platform provider's web app for KYC compliance management. They led a discovery phase, designed the wireframes and user stories, and implemented the algorithm for internal app calculations.

Custom Web Platform for Alternative Education Provider

  • Custom Software Development
  • Permanent Staffing
  • Less than $10,000
  • July - Oct. 2023
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Everything was delivered on time."

Oct 20, 2023
Manager, Ngaged Ltd.
Andrew Russell
Verified
  • Education
  • United Kingdom
  • 11-50 Employees
  • Online Review
  • Verified

TH-EY developed a custom web platform for an alternative education provider. The goal was to replace the client's current SaaS platform.

UX Design for Digital Enterprise Modernization Firm

  • UX/UI Design
  • Less than $10,000
  • December 2022
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"TH-EY was extremely helpful in ensuring the success of our projects."

Jan 10, 2023
Program Manager, Digital Enterprise Modernization Firm
Kim Bohne
Verified
  • Other industries
  • San Jose, California
  • 1-10 Employees
  • Online Review
  • Verified

TH-EY provided UX designs for a digital enterprise modernization firm. After identifying the goals and requirements, they worked with the client in creating a clickable wireframe for a prototype.

App Development for Beauty Booking App

  • Custom Software Development Mobile App Development UX/UI Design
  • $10,000 to $49,999
  • July 2021 - Jan. 2022
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"The project was a pleasure to be part of thanks to the ease of communication and understanding from the team."

Nov 9, 2022
Founder, Beauty Booking App
Harvey Cuthbert
Verified
  • Other industries
  • London, England
  • 1-10 Employees
  • Online Review
  • Verified

TH-EY developed an app for a native beauty booking platform on iOS and Google Play. Key features included an easy-to-use UX. 

Web App Development for Management Consulting Firm

  • Custom Software Development
  • $10,000 to $49,999
  • Sep. 2021 - Jan. 2022
4.5
Quality
4.0
Schedule
4.5
Cost
4.5
Willing to Refer
5.0

"They showed commitment to our result!"

Feb 1, 2022
Director, Rivoir Capital
Martijn Klinkhamer
Verified
  • Financial services
  • Amsterdam, Netherlands
  • 11-50 Employees
  • Online Review
  • Verified

TH-EY built a web app for a management consulting firm's internal workflow. The client wanted to transition from Microsoft Office to a dedicated app that scales their company.

Custom Web Development for Job Listing Platform

  • Custom Software Development
  • $50,000 to $199,999
  • Jan. - June 2021
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"TH-EY has a proven track record and brings the lessons learned from previous projects with them to new work."

Sep 29, 2021
Founder & CEO, Onboard
James Collie
Verified
  • Other industries
  • London, England
  • 1-10 Employees
  • Online Review
  • Verified

TH-EY was hired to provide custom web development for a job listing platform. The platform was expected to facilitate hiring processes. Technologies used include JavaScript, React, and JWS. 

Web App Dev for B2B SaaS Company

  • Web Development
  • Less than $10,000
  • Aug. - Dec. 2020
5.0
Quality
4.5
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"All the features that we required in the initial estimation were developed plus a couple of extra ones."

Jan 11, 2021
Co-Founder, Common Surface
Anonymous
Verified
  • Other industries
  • London, England
  • 1-10 Employees
  • Online Review
  • Verified

TH-EY provided web development services for a B2B SaaS company. The team was hired to create a web application to help with the client's office employee management. 

Showing 1-11 of 31 Reviews

Packages we offer:

UX Services

Improve your app's key metrics with our UX services. If you don't measure KPIs or don't know what to measure, choose Small Tier. 2nd tier is best for apps fighting to get more users. Choose Large Tier if your app has users signing up, but you want to improve retention.

Small

Start measuring, setup analytics and KPIs

$380 /total
  • Web analytics setup
  • Mobile analytics setup
  • KPIs definition
  • KPIs dashboard setup
  • 1 week delivery

Large

Improve user retention with advanced UX Audit

$2,689 /total
  • Web analytics setup
  • Mobile analytics setup
  • KPIs definition
  • KPIs dashboard setup
  • Landing page UX audit
  • 3 week delivery
Features

Small

$380

/total

Medium

$888

/total

Large

$2,689

/total

Web analytics setup

Mobile analytics setup

KPIs definition

KPIs dashboard setup

Landing page UX audit

Signup process UX audit

App Store/Google Play analysis (when applicable))

Introductory workshop

UX audit of key user flows

Report with prioritised recommendations to improve KPIs

Small

$380

/total

Web analytics setup

Mobile analytics setup

KPIs definition

KPIs dashboard setup

Landing page UX audit

Signup process UX audit

App Store/Google Play analysis (when applicable))

Introductory workshop

UX audit of key user flows

Report with prioritised recommendations to improve KPIs

Medium

$888

/total

Web analytics setup

Mobile analytics setup

KPIs definition

KPIs dashboard setup

Landing page UX audit

Signup process UX audit

App Store/Google Play analysis (when applicable))

Introductory workshop

UX audit of key user flows

Report with prioritised recommendations to improve KPIs

Large

$2,689

/total

Web analytics setup

Mobile analytics setup

KPIs definition

KPIs dashboard setup

Landing page UX audit

Signup process UX audit

App Store/Google Play analysis (when applicable))

Introductory workshop

UX audit of key user flows

Report with prioritised recommendations to improve KPIs

Our Story

Two developers left corporate in 2017 because they believed software gets better when clients talk directly to the people building it. No layers, no translators. That's still how we work - a remote team of 25, where developers lead projects and own client relationships. Eight years later, the longest client relationship we have is still running.

What Sets Us Apart

No middlemen

There are no project managers sitting between you and the team. The developer on your project handles communication, owns the timeline, and is your main point of contact throughout.

A team that sticks around

26 of our projects have run for 2 or more years. Clients don't tend to leave because the people they're working with feel like an extension of their own team, not a rotating roster of contractors.

We advise, we don't just build

Every developer is expected to understand your business goals, not just the technical brief. That means you get someone who'll question the approach, flag a better path, and think about what actually moves your business - not just close the ticket.

Clutch verification provides an additional layer of data to help you make the right purchasing decision of business services.

Learn More
Verified Client Reviews
28
Overall Review Rating
5
Source
Clutch
Last Updated
January 22, 2026

Business Entity

Business Entity Name TH-EY S&D Ltd
Source Companies House
Jurisdiction of Formation United Kingdom
Date of Formation October 26, 2017
Status Active
Last Updated April 4, 2024
ID 11033177

Credit Report Results

International Credit Risk Assessment Very Low Risk
Source Creditsafe
Last Updated April 4, 2024
Learn More About The Clutch Verification Process

Locations (2)

3 Wingfield Road LondonEngland E17 9NN

2 - 5

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