Best Software Development Outsourcing UK

Infinum vs Thoughtworks: full comparison for 2026

Quick verdict

Infinum (4.1/5) edges ahead of Thoughtworks (3.9/5) overall. Infinum is the better choice for consumer apps where design quality matters. Thoughtworks is the stronger option for complex modernisation, engineering culture change. The right choice depends on your project size, budget, and required tech stack.

Infinum vs Thoughtworks: head-to-head summary

Criterion Infinum Thoughtworks
Founded 2005 1993
HQ Zagreb, Croatia (London office) Chicago, United States (UK offices)
Team size 350–450 10,000+
Rating 4.1 / 5 3.9 / 5
Primary differentiator In-house product design and mobile engineering with a strong portfolio of consumer apps Thought leadership in software practice, backed by a large global delivery network
Pricing model Time and materials, fixed price Time and materials
Min. engagement Not published Not published
Primary tech stack Swift, Kotlin, Flutter Java, Kotlin, TypeScript
Industries served Financial services, Media, Healthcare, Retail Financial services, Retail, Public sector, Healthcare, Media

Infinum vs Thoughtworks: overview

Infinum

Infinum was founded in Zagreb, Croatia in 2005 and employs around 400 people across Zagreb, Varaždin, Ljubljana, Podgorica, Amsterdam, New York and London. Its London office opened in 2021. The company is best known for polished mobile and web products, with design and engineering kept under one roof. Croatian rates sit below the UK but above the cheapest Eastern European options.

Thoughtworks

Thoughtworks was founded in Chicago in 1993 and has had a significant UK presence for decades. Apax Partners took it private in a deal valued at about $1.75bn that closed in late 2024, after a NASDAQ listing in 2021, and the transaction came with job cuts affecting about 6–7% of its 10,500 staff. It is known for its Technology Radar and for shaping agile and continuous-delivery practice. It has delivery centres in India, China, Brazil and elsewhere, but UK engagements usually lean on senior onshore consultants.

Services and capabilities: Infinum vs Thoughtworks

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

Tech stack comparison: Infinum vs Thoughtworks

Framework / platform Infinum Thoughtworks
.NET N/A N/A
Java N/A ✓
Python N/A N/A
React ✓ N/A
AWS N/A ✓
Azure N/A ✓
Kubernetes N/A ✓
Embedded N/A N/A

Pricing comparison: Infinum vs Thoughtworks

Criterion Infinum Thoughtworks
Minimum engagement Not published Not published
Engagement models Fixed project, Time and materials Time and materials, Team extension
Rate transparency Not public Not public
Price tier Mid-market Mid-market

Target audience comparison: Infinum vs Thoughtworks

Dimension Infinum Thoughtworks
Best company size Startup to mid-market Enterprise
Best industries Financial services, Media, Healthcare Financial services, Retail, Public sector
Best use cases A bank wants a new retail banking app designed and built., A media brand needs iOS and Android apps with a shared design system. A bank wants to break up a core monolith., A retailer needs to rebuild its platform and change how teams work.
Typical project type Fixed project Time and materials

Infinum vs Thoughtworks: pros and cons

Infinum
+ Design and engineering work as one team, which helps consumer-facing products
+ EU-based delivery simplifies GDPR-related contract terms
+ A London office lets UK clients meet the team in person
- Better suited to product builds than large enterprise back-office systems
- Smaller than most nearshore vendors on this list, which limits team growth
Thoughtworks
+ Very strong senior consultants and engineering practices
+ Global delivery network for blended teams
+ Well suited to modernisation programmes that need cultural change
- Taken private by Apax in 2024 alongside a restructuring that cut 6–7% of staff
- Premium pricing, especially with senior UK consultants
- Overkill for straightforward builds

Who should choose Infinum?

A typical fit: a bank wants a new retail banking app designed and built.

In-house product design and mobile engineering with a strong portfolio of consumer apps. Minimum engagement is not publicly disclosed. Works best with clients in Financial services, Media, Healthcare, Retail.

Who should choose Thoughtworks?

A typical fit: a bank wants to break up a core monolith.

Thought leadership in software practice, backed by a large global delivery network. Minimum engagement is not publicly disclosed. Works best with clients in Financial services, Retail, Public sector, Healthcare, Media.

Decision matrix: Infinum vs Thoughtworks

Your situation Recommended choice
You need full-ownership delivery on a defined project scope Infinum
You need a large dedicated team for an ongoing programme Check each company's engagement model
Your budget is at the lower end Compare: Infinum (Not published) vs Thoughtworks (Not published)
You need specialist depth in a specific vertical Thoughtworks
You want engineers added to your own in-house team Thoughtworks
Your product includes hardware, firmware or connected devices Neither; consider an embedded specialist

Use case fit: Infinum vs Thoughtworks

Use case Infinum fit Thoughtworks fit Winner
A bank wants a new retail banking app designed and built. Strong Limited Infinum
A media brand needs iOS and Android apps with a shared design system. Strong Limited Infinum
A bank wants to break up a core monolith. Limited Strong Thoughtworks
A retailer needs to rebuild its platform and change how teams work. Limited Strong Thoughtworks
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 Limited Infinum

Verdict: Infinum vs Thoughtworks

Infinum (4.1/5) is the stronger overall choice for most Software Development Outsourcing projects. In-house product design and mobile engineering with a strong portfolio of consumer apps.

Thoughtworks (3.9/5) is worth a look in a scenario like this: a retailer needs to rebuild its platform and change how teams work. If your situation matches that, Thoughtworks is a competitive option.

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Infinum vs Thoughtworks FAQ

Is Infinum better than Thoughtworks?

Infinum (4.1/5) scores higher overall, but "better" depends on your use case. Infinum's strongest advantage: design and engineering work as one team, which helps consumer-facing products. Thoughtworks's strongest advantage: very strong senior consultants and engineering practices.

How do Infinum and Thoughtworks differ in pricing?

Infinum uses time and materials, fixed price pricing. Thoughtworks uses time and materials pricing. Neither firm publishes a full rate card; a discovery call is required for project-specific quotes.

Which is better for enterprise: Infinum or Thoughtworks?

Infinum 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 Infinum and Thoughtworks?

Infinum's primary differentiator is: in-house product design and mobile engineering with a strong portfolio of consumer apps. Thoughtworks's primary differentiator is: thought leadership in software practice, backed by a large global delivery network. They also differ in team size (350–450 vs 10,000+), minimum engagement (Not published vs Not published), and primary industries served (Financial services, Media vs Financial services, Retail).

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