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Award-Winning Mobile App & Software Development

3 Sided Cube is an AI-first technology partner with over 100 million downloads across 87+ countries. We build mobile apps, web applications, custom software, automation workflows, and custom LLMs for organisations that need technology that performs at scale.

Our clients span emergency response, culture, environment and enterprise - including The American Red Cross, Glastonbury Festival, Vodafone and Surfers Against Sewage. We're trusted where failure isn't an option.

  • Min project size
    $50,000+
  • Hourly rate
    $100 - $149 / hr
  • Employees
    50 - 249
  • Locations
    Bournemouth, England
  • Year founded
    Founded 2009
  • Languages
  • Timezones

1 Language that we service

  • English

10 Timezones that we service

ACT
Australia Central Time (ACT)
AET
Australia Eastern Time (AET)
CET
Central European Time (CET)
EST
Eastern Standard Time (EST)
EET
Eastern European Time (EET)
GMT
Greenwich Mean Time (GMT)
MET
Middle East Time (MET)
MST
Mountain Standard Time (MST)
NST
New Zealand Standard Time (NST)
PST
Pacific Standard Time (PST)

2 Locations

  • Bournemouth , England
  • Winter Garden , FL

Select Focus Area
Application Platforms
Amazon Application Development Framework
20%
Linux server
20%
Other app platform
20%
Windows server
20%
AI Technologies & Models
Anthropic
75%
Open AI GPT-3
25%
Frameworks and CMS
.NET
10%
Other frameworks and CMS
10%
Programming & Scripting
PHP
25%
Python
25%
User Experience Focus
Industries
Education
15%
Energy & natural resources
15%
Government
15%
Medical
15%
Non-profit
15%
Retail
15%
Information technology
10%
Clients
Midmarket ($10M - $1B)
40%
Enterprise (>$1B)
30%
Small Business (<$10M)
30%

Pricing Snapshot

Min. project size $50,000+
Avg. hourly rate $100 - $149 /hr
Rating for cost 4.5 /5

What Clients Have Said

3 SIDED CUBE offers good value for cost, with project investments ranging from $10,000 to $500,000. Clients appreciate their responsive communication and project management, often achieving successful outcomes within budget and timeline.

This summary is based on verified Clutch reviews.

Most Common Project Size

$50,000 - $199,999 based on 38 reviews
< $49,999 $50,000 - $199,999 $200,000 - $999,999 > $1,000,000

Select a service to see pricing information

3 SIDED CUBE Review Insights

Overall Review Rating

4.9
  • Quality 4.8
  • Schedule 4.8
  • Cost 4.5
  • Willing to Refer 5.0

Top Mentions

Review Highlights

  • Alignment with Client Values

    3 SIDED CUBE is noted for aligning well with clients' missions and values, especially those centered around social impact and environmental causes. This alignment fosters strong partnerships, as the team is genuinely invested in the success and purpose of the projects they undertake.

  • Challenges with Flexibility

    While generally praised for their project management, some clients noted challenges with flexibility in adjusting plans mid-project due to the structured nature of their processes. This suggests potential room for improvement in accommodating changes.

  • Innovative and Creative Solutions

    3 SIDED CUBE is recognized for their creativity and innovation, often coming up with unique solutions that enhance project outcomes. Their ability to think outside the box and offer fresh perspectives is a valued attribute by clients across various industries.

  • Proficiency in App Development

    3 SIDED CUBE excels in developing mobile and web applications, frequently praised for their technical skills and innovative solutions. Clients from various sectors, including healthcare, environmental services, and nonprofits, have appreciated their ability to deliver high-quality products tailored to specific needs.

  • Impressive Client Engagement

    Clients value 3 SIDED CUBE's engagement and enthusiasm for their projects, which translates into a collaborative and dynamic working relationship. The team's passion for their work and commitment to client success are frequently mentioned as standout qualities.

  • Strong Project Management

    Clients consistently commend 3 SIDED CUBE for their effective project management, timely deliveries, and responsive communication. They use tools like Basecamp and Slack to keep clients updated, ensuring projects stay on track. Their organized approach has been highlighted as a key factor in their successful engagements.

3 SIDED CUBE Reviews

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App Partnership with Humanitarian Aid Nonprofit

  • Custom Software Development
  • $200,000 to $999,999
5.0
Quality
5.0
Schedule
4.5
Cost
4.5
Willing to Refer
5.0

"They've got tremendous chops on the back-end server side of things."

Jun 30, 2016
Former Digital Engagement Senior Director, Nonprofit
Anonymous
Verified
  • Other industries
  • New York, United States
  • 10,001+ Employees
  • Phone Interview
  • Verified

3 Sided Cube has worked with the client to develop 10-12 apps, all of which are available on both the Android and iOS platforms.

App Development for Nonprofit

  • Custom Software Development
  • $200,000 to $999,999
5.0
Quality
5.0
Schedule
4.5
Cost
5.0
Willing to Refer
5.0

"We really like that 3 Sided Cube approaches our work as a partner more than as a customer."

Jun 28, 2016
Senior Technical Advisor, Global Disaster Preparedness Center
Omar Abou-Samra
Verified
  • Other industries
  • Washington, District of Columbia
  • 11-50 Employees
  • Phone Interview
  • Verified

3 Sided Cube developed an app, for both the Android and iOS platforms, that could be adapted for the local languages of many different countries.

App Development for Mental Health Awareness Initiative

  • Custom Software Development
  • $50,000 to $199,999
5.0
Quality
5.0
Schedule
5.0
Cost
4.0
Willing to Refer
5.0

"[3 Sided Cube] were very much about the user experience first and foremost."

Jun 27, 2016
Community Program Manager, Mental Health Charity
Stuart Reid
Verified
  • Other industries
  • United Kingdom
  • Phone Interview
  • Verified

3 Sided Cube developed a mental health awareness app, designed to deliver information to university students in an engaging, friendly, and non-stigmatizing way.

Mobile App Dev & UX/UI Design for Consulting Co

  • Mobile App Development UX/UI Design
  • UX Strategy
    +3
  • Confidential
  • Nov. 2024 - May 2025
5.0
Quality
4.5
Schedule
4.5
Cost
5.0
Willing to Refer
5.0

"They're simply a wonderful, fun, engaged group of humans who do wonderful work with optimism and joy."

Jun 3, 2025
Co-Founder, Swagatar
Jeff Hampton
  • Other industries
  • Virginia Beach, Virginia
  • 1-10 Employees
  • Online Review

3 SIDED CUBE developed a cross-platform mobile app for a consulting company. The team designed and built a new mobile app using React Native Expo, powered by a scalable set of backend services.

Mobile App Development for National Charity

  • Mobile App Development
  • Enterprise Mobile App Development
  • $200,000 to $999,999
  • May 2023 - Apr. 2024
4.5
Quality
5.0
Schedule
4.5
Cost
4.5
Willing to Refer
5.0

"They were very responsive to our feedback."

Jul 12, 2024
Founder & CEO, National Charity
Anonymous
Verified
  • Other industries
  • United Kingdom
  • 1-10 Employees
  • Online Review
  • Verified

3 SIDED CUBE helped a national charity improve their app's functionality. The scope included automating the mentor-mentee matching process and enabling the internal team to share opportunities through the app.

Web Design & Dev for Environmental Research Program

  • UX/UI Design Web Design Web Development
  • Amazon Application Development Framework
    +1
  • Confidential
  • Feb. - May 2023
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"Their communication and commitment to understanding our vision for the end product were incredible."
Nov 22, 2023
Director, Environmental Research Program
Anonymous
Verified
  • Other industries
  • Murfreesboro, Tennessee
  • 1-10 Employees
  • Online Review
  • Verified

3 SIDED CUBE developed a web platform for an environmental research program. The goal was to streamline processes and develop a collaborative UI that allowed to communicate directly and interact with data.

Survey App for IT Services Company

  • Other IT Consulting and SI
  • $10,000 to $49,999
  • Feb. - June 2019
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"They were very responsive to requests and had their own opinions on the project."

Dec 15, 2019
CEO, Feedback Devices Company
Anonymous
Verified
  • Other industries
  • Bournemouth, England
  • 11-50 Employees
  • Online Review
  • Verified

3 SIDED CUBE (formerly Chelsea Apps) rewrote an iOS and Android app with survey collection features. This involved producing documentation about app maintenance. 

App Development for Commercial Leasing Platform

  • Custom Software Development
  • $50,000 to $199,999
  • June 2019 - Ongoing
4.5
Quality
4.5
Schedule
5.0
Cost
4.0
Willing to Refer
5.0

"Their methods and workflows have been very effective."

Dec 3, 2019
Founder, Commercial Leasing Platform
Nicholas Kirby
Verified
  • Advertising & marketing
  • United Kingdom
  • 1-10 Employees
  • Online Review
  • Verified

3 SIDED CUBE (formerly Chelsea Apps) provided end-to-end app development services for a commercial real estate leasing platform.

Showing 41-49 of 49 Reviews

Fast Play

Fast Play is how we help you test smart and move fast. Validating your idea in a week, not months. Whether it’s an AI workflow, app concept, or something in-between, we take your idea, build what matters, and hand back a working prototype you can actually use (or use to get sign-off or secure the big bucks).

Small

Your shortcut to develop ideas to proof-of-concept

$14,850 /total
  • Align & Define
  • Ideation
  • Critique & Decide
  • Prototyping: 2 days

Large

Maximum time to develop the MVP and prove concepts

$19,800 /total
  • Align & Define
  • Ideation
  • Critique & Decide
  • Prototyping: 6 days
  • Documentation
Features

Small

$14,850

/total

Medium

$17,820

/total

Large

$19,800

/total

Align & Define

Ideation

Critique & Decide

Prototyping

2 days

4 days

6 days

Documentation

Small

$14,850

/total

Align & Define

Ideation

Critique & Decide

Prototyping

2 days

Documentation

Medium

$17,820

/total

Align & Define

Ideation

Critique & Decide

Prototyping

4 days

Documentation

Large

$19,800

/total

Align & Define

Ideation

Critique & Decide

Prototyping

6 days

Documentation

Our Story

We are 3 Sided Cube: a multi‑award‑winning Tech for Good studio that designs and builds in‑house software to save lives, shift systems and scale social impact. Our distributed, cross‑discipline team blends engineering, product, design and ops, guided by collaboration, user‑centred design, transparent delivery and thoughtful AI. We partner with leading mission organisations across disaster response, climate, mental health and global connectivity.

Meet the Team

Duncan Cook

Duncan CookCEO

Founder of 3 Sided Cube, with a huge passion for building projects that have real measurable impact.

James Marriott

James MarriottHead of Creative

James is a visual communication professional with over 11 years of industry experience in putting a love of making visuals that solve problems to use across design projects spanning UI, print, and brand design.

Kevin Borrill

Kevin BorrillHead of Engineering

Kev's main role at 3 SIDED CUBE is to be head of the engineering team and to ensure that he is wearing a hat backwards at all times. On his down time he enjoys volunteering with the Scouting movement and watching panda videos on the internet.

Matt Lawrence

Matt LawrenceHead of Marketing

With 25 years in marketing, Matt is all about listening, learning, and creating experiences that feel human. He digs into customer behaviour, market dynamics, and the little details that turn good marketing into great.

What Sets Us Apart

AI-Native, Human-Centred

We combine cutting-edge AI development with deep human-centred design. The result? Intelligent, intuitive products that people actually use. From AI-powered apps to automation, we build tech that feels simple but performs powerfully.

Proven at Global Scale

With millions of users reached through products like the official Glastonbury Festival app, we know what it takes to scale. Our team delivers reliable, high-performance mobile and web apps built for real-world demand.

Built for Impact, Not Just Output

We design and develop digital products that drive measurable real-world impact - from behaviour change to global reach. Trusted by NGOs, governments, and ambitious brands to turn complex challenges into scalable, high-performing apps.

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

Learn More
Verified Client Reviews
48
Overall Review Rating
4.9
Source
Clutch
Last Updated
April 22, 2026

Business Entity

Business Entity Name 3 SIDED CUBE DESIGN LTD
Source Companies House
Jurisdiction of Formation United Kingdom
Date of Formation March 15, 2005
Status Active
Last Updated February 6, 2019
ID 5393027

Credit Report Results

International Credit Risk Assessment Very Low Risk
Source Creditsafe
Last Updated January 1, 2022
Learn More About The Clutch Verification Process

Locations (2)

Patch, 1st Floor, Bobby's, 2-12 Commercial Road, BournemouthEngland BH2 5LP

31 - 40

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