Best Software Development Outsourcing UK

Kainos vs Itransition: full comparison for 2026

Quick verdict

Kainos (4.2/5) edges ahead of Itransition (3.8/5) overall. Kainos is the better choice for UK government digital services, Workday programmes. Itransition is the stronger option for budget-conscious buyers, broad generalist work. The right choice depends on your project size, budget, and required tech stack.

Kainos vs Itransition: head-to-head summary

Criterion Kainos Itransition
Founded 1986 1998
HQ Belfast, United Kingdom Tbilisi, Georgia (London office)
Team size 3,000+ 3,000+
Rating 4.2 / 5 3.8 / 5
Primary differentiator Combined government digital delivery and Workday partnership, listed on the LSE Low rates across a wide catalogue of development and platform services
Pricing model Time and materials, fixed price, framework call-offs Time and materials, fixed price, dedicated team
Min. engagement Not published Not published
Primary tech stack Java, .NET, AWS .NET, Java, PHP
Industries served Public sector, Healthcare, Financial services, Commercial enterprises Healthcare, Retail, Financial services, Logistics

Kainos vs Itransition: overview

Kainos

Kainos was founded in Belfast in 1986 and is listed on the London Stock Exchange. In the year to March 2026 it reported revenue of £431.1m, up 17%, and a workforce of 3,216 after adding 420 people, a rebound from a 2024/25 restructuring that cut staff by 7%. It runs three divisions: Digital Services, Workday Services and Workday Products. Its government work spans departments such as the Home Office and NHS bodies, delivered from the UK and Ireland.

Itransition

Itransition has been delivering software since 1998 and reports more than 3,000 engineers serving clients in over 40 countries. It lists a London office, while PitchBook gives Tbilisi, Georgia as its corporate office. Historically its delivery base was in Belarus, and it has since built up other locations. Its services span custom development, Salesforce and Microsoft Dynamics, and testing.

Services and capabilities: Kainos vs Itransition

Capability Kainos Itransition
Custom software development ✓ ✓
Mobile app development ✗ ✗
Cloud & DevOps ✓ ✗
Data & AI ✓ ✗
Legacy modernisation ✓ ✗
Embedded & IoT ✗ ✗
Dedicated team model ✗ ✓
Fixed-price projects ✓ ✓

Tech stack comparison: Kainos vs Itransition

Framework / platform Kainos Itransition
.NET ✓ ✓
Java ✓ ✓
Python ✓ N/A
React N/A N/A
AWS ✓ ✓
Azure ✓ ✓
Kubernetes ✓ N/A
Embedded N/A N/A

Pricing comparison: Kainos vs Itransition

Criterion Kainos Itransition
Minimum engagement Not published Not published
Engagement models Fixed project, Time and materials Dedicated team, Fixed project, Time and materials
Rate transparency Not public Not public
Price tier Mid-market Mid-market

Target audience comparison: Kainos vs Itransition

Dimension Kainos Itransition
Best company size Startup to mid-market Startup to mid-market
Best industries Public sector, Healthcare, Financial services Healthcare, Retail, Financial services
Best use cases A government department needs a GOV.UK service built and run., An NHS body wants a digital patient service delivered onshore. A company needs Salesforce customisation at a low rate., A retailer wants testing capacity for a release programme.
Typical project type Fixed project Dedicated team

Kainos vs Itransition: pros and cons

Kainos
+ Belfast-based delivery costs less than London while staying UK-based
+ Public reporting gives buyers verified financials and headcount
+ Very familiar with UK public-sector procurement frameworks
- Little offshore capacity, so rates do not compete with nearshore vendors
- Workday business takes a growing share of leadership focus
- The 2024/25 restructuring shows exposure to swings in public-sector spending
Itransition
+ Among the lowest rates for a vendor of this size
+ Covers CRM platforms such as Salesforce and Dynamics as well as custom builds
+ Large team for staffing flexibility
- Thin evidence of UK-based delivery or account leadership
- Corporate location data is inconsistent between sources
- Historical Belarus base may raise questions with some UK procurement teams

Who should choose Kainos?

A typical fit: a government department needs a GOV.UK service built and run.

Combined government digital delivery and Workday partnership, listed on the LSE. Minimum engagement is not publicly disclosed. Works best with clients in Public sector, Healthcare, Financial services, Commercial enterprises.

Who should choose Itransition?

A typical fit: a company needs Salesforce customisation at a low rate.

Low rates across a wide catalogue of development and platform services. Minimum engagement is not publicly disclosed. Works best with clients in Healthcare, Retail, Financial services, Logistics.

Decision matrix: Kainos vs Itransition

Your situation Recommended choice
You need full-ownership delivery on a defined project scope Kainos
You need a large dedicated team for an ongoing programme Itransition
Your budget is at the lower end Compare: Kainos (Not published) vs Itransition (Not published)
You need specialist depth in a specific vertical Kainos
You want engineers added to your own in-house team Neither lists team extension; ask about dedicated teams
Your product includes hardware, firmware or connected devices Neither; consider an embedded specialist

Use case fit: Kainos vs Itransition

Use case Kainos fit Itransition fit Winner
A government department needs a GOV.UK service built and run. Strong Limited Kainos
An NHS body wants a digital patient service delivered onshore. Strong Limited Kainos
A company needs Salesforce customisation at a low rate. Limited Strong Itransition
A retailer wants testing capacity for a release programme. Limited Strong Itransition
You need hardware, firmware or IoT work in the same contract Limited Limited Both equally
You want a fixed-price first phase before a longer engagement Strong Strong Both equally

Verdict: Kainos vs Itransition

Kainos (4.2/5) is the stronger overall choice for most Software Development Outsourcing projects. Combined government digital delivery and Workday partnership, listed on the LSE.

Itransition (3.8/5) is worth a look in a scenario like this: a retailer wants testing capacity for a release programme. If your situation matches that, Itransition is a competitive option.

Related comparisons

Kainos vs Itransition FAQ

Is Kainos better than Itransition?

Kainos (4.2/5) scores higher overall, but "better" depends on your use case. Kainos's strongest advantage: belfast-based delivery costs less than London while staying UK-based. Itransition's strongest advantage: among the lowest rates for a vendor of this size.

How do Kainos and Itransition differ in pricing?

Kainos uses time and materials, fixed price, framework call-offs pricing. Itransition uses time and materials, fixed price, dedicated team pricing. Neither firm publishes a full rate card; a discovery call is required for project-specific quotes.

Which is better for enterprise: Kainos or Itransition?

Kainos is the larger team and typically the better enterprise-scale choice. For very large programmes, verify team size and compliance coverage directly with each company before shortlisting.

What are the main differences between Kainos and Itransition?

Kainos's primary differentiator is: combined government digital delivery and Workday partnership, listed on the LSE. Itransition's primary differentiator is: low rates across a wide catalogue of development and platform services. They also differ in team size (3,000+ vs 3,000+), minimum engagement (Not published vs Not published), and primary industries served (Public sector, Healthcare vs Healthcare, Retail).

Verify all details directly with each company before making a decision.