Best Machine Learning Development Companies in Europe

ML6 vs Siili Solutions: full comparison for 2026

Last updated: July 2026

Quick verdict

ML6 (4.7/5) edges ahead of Siili Solutions (3.7/5) overall. ML6 is the better choice for enterprises needing production MLOps infrastructure and multi-cloud AI engineering at scale. Siili Solutions is the stronger option for nordic and European enterprises wanting a publicly listed, financially transparent IT consultancy partner. The right choice depends on your project size, budget, and required tech stack.

ML6 vs Siili Solutions: head-to-head summary

Criterion ML6 Siili Solutions
Founded 2013 2005
HQ Ghent, Belgium Helsinki, Finland
Team size 51–200 501–1000
Rating 4.7 / 5 3.7 / 5
Best for Enterprises needing production MLOps infrastructure and multi-cloud AI engineering at scale Nordic and European enterprises wanting a publicly listed, financially transparent IT consultancy partner
Pricing model Dedicated team, fixed project, retainer Dedicated team, retainer, fixed project
Min. engagement $40K $30K
Primary tech stack Python, TensorFlow, PyTorch Python, Java, AWS
Industries served Enterprise, Financial Services, Retail, Manufacturing, Public Sector Enterprise, Telecommunications, Financial Services, Retail

ML6 vs Siili Solutions: overview

ML6

ML6 is a Ghent, Belgium-headquartered AI engineering company founded in 2013 by Michael Lemmer and Nicolas Deruytter. With roughly 150 AI and ML specialists, ML6 is one of Europe's most established pure-play ML consultancies, known for MLOps, computer vision, and enterprise AI infrastructure work. The company was named an OpenAI Services Partner and is a Google Cloud partner, reflecting deep hands-on delivery experience across major model providers.

Siili Solutions

Siili Solutions Oyj, founded in 2005 and headquartered in Helsinki, Finland, is a publicly listed IT consultancy on Nasdaq Helsinki (ticker SIILI) with 500 to over 1,000 employees across 19 locations. Siili offers software development, digital transformation, and machine learning services, and expanded its AI and digital product capabilities in part through its 2020 acquisition of Budapest-based Supercharge, disclosed here as an ownership change affecting Siili's broader group structure.

Services and capabilities: ML6 vs Siili Solutions

Capability ML6 Siili Solutions
ML model development
Computer vision
NLP
Generative AI / LLM integration
MLOps
AI strategy consulting
Staff augmentation

Tech stack comparison: ML6 vs Siili Solutions

Framework / platform ML6 Siili Solutions
Python
TensorFlow N/A
PyTorch N/A
AWS N/A
Azure N/A
Kubernetes N/A

Pricing comparison: ML6 vs Siili Solutions

Criterion ML6 Siili Solutions
Minimum engagement $40K $30K
Engagement models Dedicated team, Fixed project, Retainer Dedicated team, Retainer, Fixed project
Rate transparency Minimum disclosed Minimum disclosed
Price tier Accessible Accessible

Target audience comparison: ML6 vs Siili Solutions

Dimension ML6 Siili Solutions
Best company size Startup to mid-market Startup to mid-market
Best industries Enterprise, Financial Services, Retail Enterprise, Telecommunications, Financial Services
Best use cases Building enterprise-scale MLOps pipelines, Deploying computer vision for manufacturing quality control Enterprise digital transformation with an ML component, Nordic-region software development and data engineering
Typical project type Dedicated team Dedicated team

ML6 vs Siili Solutions: pros and cons

ML6
+ One of Europe's longest-running pure-play ML engineering firms, founded in 2013
+ Official OpenAI Services Partner and Google Cloud partner
+ Deep MLOps and production infrastructure expertise, not just model prototyping
+ 150-person specialist team with dedicated practice areas across computer vision, NLP, and MLOps
- Higher minimum engagement size than boutique competitors, less suited to small startups
- Primarily Benelux-based delivery, fewer nearshore options for very tight budgets
Siili Solutions
+ Publicly listed on Nasdaq Helsinki, providing financial transparency and stability signals
+ Two decades of operating history since founding in 2005, with a large, established Nordic footprint
+ 19 office locations support broad European coverage and delivery flexibility
+ Expanded AI and digital product capability via its 2020 acquisition of Supercharge in Budapest
- AI and ML is one practice within a much broader generalist IT consultancy portfolio
- 2020 acquisition of Supercharge represents a group ownership change worth understanding before engaging that subsidiary specifically
- Larger public-company structure may mean less flexibility than privately held boutiques

Who should choose ML6?

ML6 is the right choice for enterprises needing production MLOps infrastructure and multi-cloud AI engineering at scale.

Official OpenAI Services Partner status combined with over a decade of pure-play ML engineering focus. Minimum engagement starts at $40K. Works best with clients in Enterprise, Financial Services, Retail, Manufacturing, Public Sector.

Who should choose Siili Solutions?

Siili Solutions is the right choice for nordic and European enterprises wanting a publicly listed, financially transparent IT consultancy partner.

Publicly traded on Nasdaq Helsinki, offering financial transparency uncommon among privately held ML firms. Minimum engagement starts at $30K. Works best with clients in Enterprise, Telecommunications, Financial Services, Retail.

Decision matrix: ML6 vs Siili Solutions

Your situation Recommended choice
You need full-ownership delivery on a defined project scope ML6
You need a large dedicated team for an ongoing programme ML6
Your budget is at the lower end Siili Solutions
You need specialist depth in a specific vertical ML6
You need staff augmentation or team extension Neither; consider alternatives that offer staff aug
You need consulting before committing to a build ML6

Use case fit: ML6 vs Siili Solutions

Use case ML6 fit Siili Solutions fit Winner
Building enterprise-scale MLOps pipelines Strong Limited ML6
Deploying computer vision for manufacturing quality control Strong Limited ML6
Enterprise digital transformation with an ML component Strong Strong Both equally
Nordic-region software development and data engineering Limited Strong Siili Solutions
Fixed-price build Limited Limited Both equally
Staff augmentation Limited Limited Both equally

Verdict: ML6 vs Siili Solutions

ML6 (4.7/5) is the stronger overall choice for most Machine Learning Development projects. Official OpenAI Services Partner status combined with over a decade of pure-play ML engineering focus. It is best for enterprises needing production MLOps infrastructure and multi-cloud AI engineering at scale.

Siili Solutions (3.7/5) is the better choice when nordic and European enterprises wanting a publicly listed, financially transparent IT consultancy partner. If your situation matches those criteria, Siili Solutions is a competitive option.

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ML6 vs Siili Solutions FAQ

Is ML6 better than Siili Solutions?

ML6 (4.7/5) scores higher overall, but "better" depends on your use case. ML6 is better for enterprises needing production MLOps infrastructure and multi-cloud AI engineering at scale. Siili Solutions is better for nordic and European enterprises wanting a publicly listed, financially transparent IT consultancy partner.

How do ML6 and Siili Solutions differ in pricing?

ML6 uses dedicated team, fixed project, retainer pricing with a minimum engagement of $40K. Siili Solutions uses dedicated team, retainer, fixed project pricing with a minimum engagement of $30K. Neither firm publishes a full rate card; a discovery call is required for project-specific quotes.

Which is better for enterprise: ML6 or Siili Solutions?

Siili Solutions 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 ML6 and Siili Solutions?

ML6's primary differentiator is: official openai services partner status combined with over a decade of pure-play ml engineering focus. Siili Solutions's primary differentiator is: publicly traded on nasdaq helsinki, offering financial transparency uncommon among privately held ml firms. They also differ in team size (51–200 vs 501–1000), minimum engagement ($40K vs $30K), and primary industries served (Enterprise, Financial Services vs Enterprise, Telecommunications).

Last reviewed: July 2026. Verify all details directly with each company before making a decision.