Leighton

United Kingdom

Application development, cloud architecture and testing for differentiating software products

Leighton builds software products intended to differentiate a business, alongside systems that automate or optimise critical processes. Based in England, the company works with organisations looking for experienced, agile development support rather than a generic build shop, describing its model as "build as a service" with embedded experts working directly inside client teams.

The range of services covers application development, systems integration, cloud architecture across AWS, Azure and GCP, and DevSecOps enablement, supported by manual and automated testing to keep releases stable. Leighton holds AWS Advanced Tier Partner status and counts an AWS Hero and an AWS Community Builder among its staff, giving the cloud engineering practice a grounding in current AWS tooling and community involvement.

Delivery examples include testing market viability for a new product with an MVP built in 20 weeks, and streamlining access to applications through a single sign-on solution. Leighton states it is trusted by some of the world's biggest brands, reflecting a mix of product discovery, cloud architecture and performance engineering work carried out for clients with demanding technical requirements.

3
SERVICES

Capabilities

Services

What these services involve

Application Development
Application Development for custom software development buyers. Clear scope, measurable outcomes, and reliable delivery.
DevSecOps Enablement
DevSecOps Enablement for custom software development buyers. Clear scope, measurable outcomes, and reliable delivery.
Systems Integration
Systems Integration for custom software development buyers. Clear scope, measurable outcomes, and reliable delivery.

Agency details

Team size
201-500 people

About this agency on Agency List

Leighton holds an Agency List Score of 97 out of 100.

That score is higher than 94% of the 36,919 agencies Agency List has assessed so far.

The Agency List Score measures how well an agency documents its work in public: named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than to the client.

It does not measure client satisfaction, price, or availability.

How the Agency List Score is measured

Assessment date

Agency List assessed Leighton in September 2026, reading 6 pages published on leighton.com.

The score reflects what Leighton had published by that date; anything published since has not been read.

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