BJSS (CGI) vs Sigma Software: full comparison for 2026
Quick verdict
BJSS (CGI) (4.0/5) edges ahead of Sigma Software (4.0/5) overall. BJSS (CGI) is the better choice for NHS and government programmes, large onshore delivery. Sigma Software is the stronger option for broad-scope outsourcing, Scandinavian-owned vendor. The right choice depends on your project size, budget, and required tech stack.
BJSS (CGI) vs Sigma Software: head-to-head summary
| Criterion | BJSS (CGI) | Sigma Software |
|---|---|---|
| Founded | 1993 | 2002 |
| HQ | Leeds, United Kingdom (owned by CGI) | Stockholm, Sweden and Kyiv, Ukraine (UK presence) |
| Team size | 2,000–2,500 | 2,000+ |
| Rating | 4.0 / 5 | 4.0 / 5 |
| Primary differentiator | Large UK onshore delivery capacity, now backed by CGI's global network | Swedish group ownership with Ukrainian and Polish engineering |
| Pricing model | Time and materials, fixed price, managed service | Time and materials, dedicated team, fixed price |
| Min. engagement | Not published | Not published |
| Primary tech stack | Java, .NET, AWS | Java, .NET, C++ |
| Industries served | Public sector, Healthcare, Financial services, Retail, Energy | Automotive, Telecoms, Financial services, Media, Healthcare |
BJSS (CGI) vs Sigma Software: overview
BJSS (CGI)
BJSS was founded in Leeds in 1993 and grew into one of the UK's largest independent technology consultancies before CGI completed its acquisition in February 2025. The deal brought about 2,400 BJSS staff into CGI and took CGI's UK headcount past 8,500. BJSS teams are being merged into CGI's metro-based UK operating model. UK clients get the scale and governance of a global group, with nearshore capacity now available through CGI centres such as Portugal.
Sigma Software
Sigma Software was founded in 2002 and belongs to the Swedish Sigma group. It describes a team of over 2,100 professionals in 40 offices across 19 countries, with most engineering in Ukraine and Poland. Directories list it inconsistently as UK-based or Stockholm-based, which reflects its mix of Swedish ownership and international offices. It covers a broad range of services and industries.
Services and capabilities: BJSS (CGI) vs Sigma Software
| Capability | BJSS (CGI) | Sigma Software |
|---|---|---|
| Custom software development | ✓ | ✓ |
| Mobile app development | ✗ | ✗ |
| Cloud & DevOps | ✓ | ✓ |
| Data & AI | ✓ | ✓ |
| Legacy modernisation | ✗ | ✗ |
| Embedded & IoT | ✗ | ✓ |
| Dedicated team model | ✗ | ✓ |
| Fixed-price projects | ✓ | ✓ |
Tech stack comparison: BJSS (CGI) vs Sigma Software
| Framework / platform | BJSS (CGI) | Sigma Software |
|---|---|---|
| .NET | ✓ | ✓ |
| Java | ✓ | ✓ |
| Python | ✓ | ✓ |
| React | N/A | ✓ |
| AWS | ✓ | ✓ |
| Azure | ✓ | ✓ |
| Kubernetes | ✓ | N/A |
| Embedded | N/A | N/A |
Pricing comparison: BJSS (CGI) vs Sigma Software
| Criterion | BJSS (CGI) | Sigma Software |
|---|---|---|
| Minimum engagement | Not published | Not published |
| Engagement models | Fixed project, Managed service, 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: BJSS (CGI) vs Sigma Software
| Dimension | BJSS (CGI) | Sigma Software |
|---|---|---|
| Best company size | Startup to mid-market | Startup to mid-market |
| Best industries | Public sector, Healthcare, Financial services | Automotive, Telecoms, Financial services |
| Best use cases | An NHS trust needs a national-scale digital service., A bank wants a large onshore team with independent testing. | A telecoms firm needs network software engineers., An automotive supplier wants embedded developers. |
| Typical project type | Fixed project | Dedicated team |
BJSS (CGI) vs Sigma Software: pros and cons
| BJSS (CGI) | |
|---|---|
| + | Long record on large NHS and government programmes |
| + | CGI ownership adds financial stability and access to nearshore centres |
| + | Strong testing and quality engineering practice |
| - | Acquired by CGI in 2025, and integration into CGI's model may change account teams and processes |
| - | Large-consultancy pricing and governance are heavy for small projects |
| Sigma Software | |
|---|---|
| + | Swedish parent adds governance and financial backing |
| + | Broad technical range, including embedded and automotive |
| + | Ukrainian and Polish rates |
| - | UK office details are hard to confirm from public sources |
| - | Breadth means less obvious specialism in any one area |
Who should choose BJSS (CGI)?
A typical fit: an NHS trust needs a national-scale digital service.
Large UK onshore delivery capacity, now backed by CGI's global network. Minimum engagement is not publicly disclosed. Works best with clients in Public sector, Healthcare, Financial services, Retail, Energy.
Who should choose Sigma Software?
A typical fit: a telecoms firm needs network software engineers.
Swedish group ownership with Ukrainian and Polish engineering. Minimum engagement is not publicly disclosed. Works best with clients in Automotive, Telecoms, Financial services, Media, Healthcare.
Decision matrix: BJSS (CGI) vs Sigma Software
| Your situation | Recommended choice |
|---|---|
| You need full-ownership delivery on a defined project scope | BJSS (CGI) |
| You need a large dedicated team for an ongoing programme | Sigma Software |
| Your budget is at the lower end | Compare: BJSS (CGI) (Not published) vs Sigma Software (Not published) |
| You need specialist depth in a specific vertical | BJSS (CGI) |
| 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 | Sigma Software |
Use case fit: BJSS (CGI) vs Sigma Software
| Use case | BJSS (CGI) fit | Sigma Software fit | Winner |
|---|---|---|---|
| An NHS trust needs a national-scale digital service. | Strong | Limited | BJSS (CGI) |
| A bank wants a large onshore team with independent testing. | Strong | Limited | BJSS (CGI) |
| A telecoms firm needs network software engineers. | Limited | Strong | Sigma Software |
| An automotive supplier wants embedded developers. | Limited | Strong | Sigma Software |
| You need hardware, firmware or IoT work in the same contract | Limited | Strong | Sigma Software |
| You want a fixed-price first phase before a longer engagement | Strong | Strong | Both equally |
Verdict: BJSS (CGI) vs Sigma Software
BJSS (CGI) (4.0/5) is the stronger overall choice for most Software Development Outsourcing projects. Large UK onshore delivery capacity, now backed by CGI's global network.
Sigma Software (4.0/5) is worth a look in a scenario like this: an automotive supplier wants embedded developers. If your situation matches that, Sigma Software is a competitive option.
Related comparisons
BJSS (CGI) vs Sigma Software FAQ
Is BJSS (CGI) better than Sigma Software?
BJSS (CGI) (4.0/5) scores higher overall, but "better" depends on your use case. BJSS (CGI)'s strongest advantage: long record on large NHS and government programmes. Sigma Software's strongest advantage: swedish parent adds governance and financial backing.
How do BJSS (CGI) and Sigma Software differ in pricing?
BJSS (CGI) uses time and materials, fixed price, managed service pricing. Sigma Software uses time and materials, dedicated team, fixed price pricing. Neither firm publishes a full rate card; a discovery call is required for project-specific quotes.
Which is better for enterprise: BJSS (CGI) or Sigma Software?
BJSS (CGI) 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 BJSS (CGI) and Sigma Software?
BJSS (CGI)'s primary differentiator is: large UK onshore delivery capacity, now backed by CGI's global network. Sigma Software's primary differentiator is: swedish group ownership with Ukrainian and Polish engineering. They also differ in team size (2,000–2,500 vs 2,000+), minimum engagement (Not published vs Not published), and primary industries served (Public sector, Healthcare vs Automotive, Telecoms).
Verify all details directly with each company before making a decision.