Web app development companies

3 Sided Cube

Bournemouth, United Kingdom

App and web platform studio building mobile products for charities and mission-led organizations.

Founded Est. 2009

AVAMAE

London, United Kingdom

Bespoke software developer using AI-assisted delivery with UK-based engineers, ISO 27001 certified.

Bit Zesty

London, United Kingdom

Ruby on Rails developer, also offering fractional CTO and AI consulting.

Founded Est. 2009

Blott

London, United Kingdom

AI design and engineering consultancy building AI-native products and agent systems.

Human Made

Matlock, United Kingdom

Enterprise WordPress agency, building content platforms for global brands and publishers.

Founded Est. 201050–249 staff

Koderly

Manchester, United Kingdom

Custom software and database development company.

Rocketmakers

Bath, United Kingdom

Software company designing and building bespoke web platforms and mobile apps.

Steer73

London, United Kingdom

Digital transformation agency, building custom software, web platforms and apps.

Founded Est. 201410–49 staff

Torchbox

Bristol, United Kingdom

Digital agency for charities and nonprofits, and creator of the Wagtail CMS.

50–249 staff

ustwo

London, United Kingdom

Digital product studio designing and building apps and digital services, with studios in Malmo and New York.

Wirebox

Milton Keynes, United Kingdom

Web development agency building bespoke websites and software.

Founded Est. 2005

THEY.dev

London, United Kingdom

Custom software and app developer, building MVPs through to complex platforms.

Founded Est. 201710–49 staff

Digital product studio researching, designing and developing web and mobile products.

Founded Est. 2018