Best Software Development Outsourcing UK

ELEKS vs Sigma Software: full comparison for 2026

Quick verdict

ELEKS (4.4/5) edges ahead of Sigma Software (4.0/5) overall. ELEKS is the better choice for data-heavy custom software, Ukrainian rates, mature processes. 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.

ELEKS vs Sigma Software: head-to-head summary

Criterion ELEKS Sigma Software
Founded 1991 2002
HQ Tallinn, Estonia (engineering in Lviv; London office) Stockholm, Sweden and Kyiv, Ukraine (UK presence)
Team size 2,000+ 2,000+
Rating 4.4 / 5 4.0 / 5
Primary differentiator Three decades of outsourced delivery with an in-house research and development unit Swedish group ownership with Ukrainian and Polish engineering
Pricing model Time and materials, dedicated team, fixed price Time and materials, dedicated team, fixed price
Min. engagement Not published Not published
Primary tech stack .NET, Java, Python Java, .NET, C++
Industries served Financial services, Logistics, Healthcare, Media, Retail Automotive, Telecoms, Financial services, Media, Healthcare

ELEKS vs Sigma Software: overview

ELEKS

ELEKS began in Lviv in 1991, which makes it one of the oldest software companies in Ukraine. It now lists Tallinn, Estonia as its corporate headquarters and keeps a London office on Beech Street. Around 2,000 specialists work on custom software, data science, and research and development projects, mostly from Ukraine and Poland. Its long history with Western European clients shows in fairly mature delivery processes.

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: ELEKS vs Sigma Software

Capability ELEKS 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: ELEKS vs Sigma Software

Framework / platform ELEKS Sigma Software
.NET ✓ ✓
Java ✓ ✓
Python ✓ ✓
React ✓ ✓
AWS ✓ ✓
Azure ✓ ✓
Kubernetes N/A N/A
Embedded N/A N/A

Pricing comparison: ELEKS vs Sigma Software

Criterion ELEKS Sigma Software
Minimum engagement Not published Not published
Engagement models Dedicated team, 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: ELEKS vs Sigma Software

Dimension ELEKS Sigma Software
Best company size Startup to mid-market Startup to mid-market
Best industries Financial services, Logistics, Healthcare Automotive, Telecoms, Financial services
Best use cases A logistics firm wants route and demand forecasting built into its operations software., A UK company needs a dedicated team for a multi-year product build at nearshore rates. A telecoms firm needs network software engineers., An automotive supplier wants embedded developers.
Typical project type Dedicated team Dedicated team

ELEKS vs Sigma Software: pros and cons

ELEKS
+ Thirty-plus years in business is a strong signal of stability for a long contract
+ A London office gives UK buyers a local contracting and meeting point
+ Data science and analytics work is a genuine strength alongside general development
+ Rates are in the Ukrainian band, well under UK onshore pricing
- Most engineering is in Ukraine, so buyers should review continuity plans given the war
- The London office is mainly a sales and account presence, not a delivery centre
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 ELEKS?

A typical fit: a logistics firm wants route and demand forecasting built into its operations software.

Three decades of outsourced delivery with an in-house research and development unit. Minimum engagement is not publicly disclosed. Works best with clients in Financial services, Logistics, Healthcare, Media, Retail.

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: ELEKS vs Sigma Software

Your situation Recommended choice
You need full-ownership delivery on a defined project scope ELEKS
You need a large dedicated team for an ongoing programme ELEKS
Your budget is at the lower end Compare: ELEKS (Not published) vs Sigma Software (Not published)
You need specialist depth in a specific vertical ELEKS
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: ELEKS vs Sigma Software

Use case ELEKS fit Sigma Software fit Winner
A logistics firm wants route and demand forecasting built into its operations software. Strong Limited ELEKS
A UK company needs a dedicated team for a multi-year product build at nearshore rates. Strong Limited ELEKS
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: ELEKS vs Sigma Software

ELEKS (4.4/5) is the stronger overall choice for most Software Development Outsourcing projects. Three decades of outsourced delivery with an in-house research and development unit.

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

ELEKS vs Sigma Software FAQ

Is ELEKS better than Sigma Software?

ELEKS (4.4/5) scores higher overall, but "better" depends on your use case. ELEKS's strongest advantage: thirty-plus years in business is a strong signal of stability for a long contract. Sigma Software's strongest advantage: swedish parent adds governance and financial backing.

How do ELEKS and Sigma Software differ in pricing?

ELEKS uses time and materials, dedicated team, fixed price 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: ELEKS or Sigma Software?

ELEKS 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 ELEKS and Sigma Software?

ELEKS's primary differentiator is: three decades of outsourced delivery with an in-house research and development unit. Sigma Software's primary differentiator is: swedish group ownership with Ukrainian and Polish engineering. They also differ in team size (2,000+ vs 2,000+), minimum engagement (Not published vs Not published), and primary industries served (Financial services, Logistics vs Automotive, Telecoms).

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