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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

No have been added yet...

    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 is noted for providing good value for cost, with pricing fitting various budgets. Clients appreciated timely delivery and responsiveness, with project sizes typically involving 2-5 team members. Specific project costs were not disclosed, but overall satisfaction with pricing was emphasized.

    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

    • Positive Impact on Business Growth

      Clients report that THEY.dev's work contributes significantly to their business growth, including successful product launches, increased user engagement, and improved operational efficiency.

    • Project Management Excellence

      They are commended for managing projects efficiently, often delivering on time and within budget. Reviews emphasize their structured approach, use of agile methodologies, and ability to adapt to project requirements.

    • Areas for Improvement in Design Creativity

      While generally praised, some clients noted that design aspects could be more imaginative. This suggests an opportunity for THEY.dev to enhance their creative offerings in design.

    • Client-Centric Approach

      THEY.dev is recognized for their client-focused approach, listening to client needs, and tailoring solutions accordingly. Their commitment to understanding business goals and delivering value is frequently mentioned.

    • Proactive Problem Solving

      THEY.dev is lauded for their proactive approach to identifying and solving problems. They offer creative solutions and technical recommendations that enhance project outcomes.

    • Strong Technical Expertise Across Projects

      Reviews consistently highlight THEY.dev's technical proficiency in web and software development across various industries. Their ability to handle complex projects, provide innovative solutions, and deliver high-quality products is a common theme among clients.

    THEY.dev Reviews

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    Chrome Extension & Web Dev for Online VPN Service

    • Custom Software Development
    • Less than $10,000
    • Oct. - Jan. 2020
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They quickly understood my requirements and provided useful feedback to improve the solution."

    Dec 2, 2020
    Founder, Online VPN Service
    Anonymous
    Verified
    • Telecommunications
    • London, England
    • 1-10 Employees
    • Online Review
    • Verified

    TH-EY developed a website and a Chrome extension for an online VPN service. They used technologies such as HTML, CSS, JavaScript, and more. The vendor provided one developer and a technical project manager.

    App Development for Social Media Startup

    • Mobile App Development
    • $10,000 to $49,999
    • Mar. 2020 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They actually listen to our ideas, spend time thinking about them, and then come back with ideas and solutions."

    Jun 26, 2020
    Co-Founder, Social Media Startup
    Anonymous
    Verified
    • Information technology
    • London, England
    • 1-10 Employees
    • Online Review
    • Verified

    TH-EY developed a mobile app for a social media startup. The team started by building out the client's MVP and went on to develop the full version of the platform.

    App Development for Restaurant Ordering Platform

    • Mobile App Development
    • $10,000 to $49,999
    • Sep. 2019 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "I can trust these guys with everything!"

    Jun 24, 2020
    CEO & Founder, M01
    Harri Siekkinen
    Verified
    • Hospitality & leisure
    • Helsinki, Finland
    • 1-10 Employees
    • Online Review
    • Verified

    TH-EY developed a mobile app for a restaurant ordering platform. The team built both an iOS and Android version of the app and provided consulting services.

    Web Development & Support for Rental Community Platform

    • Web Development
    • $50,000 to $199,999
    • Oct. 2019 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    4.5
    Cost
    5.0
    Willing to Refer
    5.0

    “TH-EY is the best development company I’ve ever worked with.”

    May 20, 2020
    CEO, Hatchpad
    Alex Gnyla
    Verified
    • Real estate
    • London, England
    • 1-10 Employees
    • Phone Interview
    • Verified

    TH-EY handles web development services for a PropTech software company. After completing an in-depth audit, their team is building the website's backend and already wrapped up some frontend UX design.

    Dashboard Design for Clothing Software Company

    • Custom Software Development
    • Less than $10,000
    • Oct. - Dec. 2019
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They have truly walked the extra mile to make solutions to fit with our budgets...."

    Jan 14, 2020
    Director, Seamless
    Kim Trager
    Verified
    • Other industries
    • London, England
    • 1-10 Employees
    • Online Review
    • Verified

    TH-EY built a prototype of a customizable, lightweight dashboard for a clothing industry software solution. They provided IT consulting services and created documentation for the prototype as well.

    Backend Systems Automation for IT Company

    • Other IT Consulting and SI
    • Less than $10,000
    • Sep. - Oct. 2019
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "Every member of the team was highly experienced and is able to find elegant solutions..."

    Jan 9, 2020
    Project Manager, Pixable
    Anick Akbar
    Verified
    • Business services
    • London, England
    • 1-10 Employees
    • Online Review
    • Verified

    TH-EY provides development support. This has involved automation, third-party integrations, and app development.

    Website & App Dev for Consumer Services Company

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

    "Their communication has been excellent—they’re super responsive..."

    Jul 8, 2019
    Own-Kind Ltd
    Ruaraidh Grubb
    Verified
    • Arts, entertainment & music
    • Londontowne, Maryland
    • 1-10 Employees
    • Online Review
    • Verified

    TH-EY develops a website and an application based on provided wireframes. 

    Landing Page Design & Development for Sales Consulting Firm

    • Web Design Web Development
    • Less than $10,000
    • Nov. 2025 - Jan. 2026
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "THEY.dev's readiness to take the time and effort to create an excellent project despite the small scope stood out."

    Jan 22, 2026
    CEO, Meaningful Sales
    Piotr Zaniewicz
    Verified
    • Advertising & marketing
    • Wroclaw, Poland
    • 1-10 Employees
    • Online Review
    • Verified

    THEY.dev designed and developed a landing page for a sales consulting firm. The team used a Webflow template to create the page, update the copy, and align the visuals with the client's brand.

    Custom Software Development for Streaming Solutions Company

    • Custom Software Development
    • $50,000 to $199,999
    • Jan. 2023 - Nov. 2024
    4.5
    Quality
    4.5
    Schedule
    4.0
    Cost
    4.0
    Willing to Refer
    5.0

    "We worked directly with the developer, Cristian, which worked very well for us."

    Dec 30, 2024
    Founder, recdek
    Ed Rigg
    Verified
    • Arts, entertainment & music
    • London, England
    • 1-10 Employees
    • Online Review
    • Verified

    TH-EY developed a technology platform for a streaming solutions company. The team was responsible for implementing new features and launching the platform.

    CMS & Web Dev for Research Company

    • Custom Software Development Web Development
    • $200,000 to $999,999
    • Sep. 2022 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They delivered on time and understood and acted on any feedback very quickly."

    Nov 18, 2024
    Director, PRS
    Dan Whittle
    Verified
    • Politics
    • London, England
    • 11-50 Employees
    • Online Review
    • Verified

    TH-EY has developed a CMS for a research company. The team has built a complex workflow system that will help deliver thousands of documents every year.

    Showing 11-20 of 31 Reviews

    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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    Meaningful Sales

    (1)
    Meaningful Sales Logotype

    Piotr Zaniewicz

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