Best Machine Learning Development Companies in Europe

Tensorway vs Siili Solutions: full comparison for 2026

Quick verdict

Tensorway (4.9/5) edges ahead of Siili Solutions (3.7/5) overall. Tensorway is the better choice for startups and mid-market, senior dedicated ML team. Siili Solutions is the stronger option for Nordic/EU enterprises, publicly listed IT consultancy. The right choice depends on your project size, budget, and required tech stack.

Tensorway vs Siili Solutions: head-to-head summary

Criterion Tensorway Siili Solutions
Founded 2019 2005
HQ Alicante, Spain Helsinki, Finland
Team size 50+ 501–1000
Rating 4.9 / 5 3.7 / 5
Primary differentiator a full-stack ML delivery team (data science, MLOps, QA) inherited from an established parent software company, at boutique-agency pricing Publicly traded on Nasdaq Helsinki, offering financial transparency uncommon among privately held ML firms
Pricing model Dedicated team, fixed project, retainer, time and materials Dedicated team, retainer, fixed project
Min. engagement $10K $30K
Primary tech stack Python, TensorFlow, PyTorch Python, Java, AWS
Industries served SaaS, Legal Tech, E-commerce, Healthcare, Financial Services Enterprise, Telecommunications, Financial Services, Retail

Tensorway vs Siili Solutions: overview

Tensorway

Tensorway is a Spain-headquartered machine learning and AI development company spun out of its parent software engineering firm. The team of roughly 50 dedicated data scientists, AI engineers, and MLOps specialists delivers custom ML models, computer vision, NLP, and generative AI systems for clients across Europe and the US. Tensorway inherits its parent's delivery infrastructure and hiring pipeline, giving it more engineering depth than most boutiques its size (15+ delivered ML projects per company website; independently unverifiable). As a relatively young standalone brand founded in 2019, its own market track record is shorter than its parent company's.

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: Tensorway vs Siili Solutions

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

Tech stack comparison: Tensorway vs Siili Solutions

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

Pricing comparison: Tensorway vs Siili Solutions

Criterion Tensorway Siili Solutions
Minimum engagement $10K $30K
Engagement models Dedicated team, Fixed project, Retainer, Time and materials, Staff augmentation Dedicated team, Retainer, Fixed project
Rate transparency Minimum disclosed Minimum disclosed
Price tier Accessible Accessible

Target audience comparison: Tensorway vs Siili Solutions

Dimension Tensorway Siili Solutions
Best company size Startup to mid-market Startup to mid-market
Best industries SaaS, Legal Tech, E-commerce Enterprise, Telecommunications, Financial Services
Best use cases Building a production computer vision pipeline for document processing, Deploying a customer-facing AI chatbot or LLM-integrated agent Enterprise digital transformation with an ML component, Nordic-region software development and data engineering
Typical project type Dedicated team Dedicated team

Tensorway vs Siili Solutions: pros and cons

Tensorway
+ Full ML delivery stack in-house: data science, MLOps/DevSecOps, and QA under one roof
+ Backed by parent company's 25-year engineering track record and hiring pipeline
+ Established project-management and QA processes for predictable, well-documented delivery
+ Broad service range from LLM integration to computer vision to predictive analytics
+ Flexible engagement models including fixed-price PoC for budget-constrained startups
+ Based in the EU (Spain), simplifying GDPR-compliant data handling for European clients
- Young standalone brand (founded 2019) with a shorter independent track record than its 25-year-old parent company
- Public case studies are limited in number relative to larger regional players
- Smaller team size (around 50) means less capacity for very large enterprise programmes
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 Tensorway?

A typical fit: building a production computer vision pipeline for document processing.

a full-stack ML delivery team (data science, MLOps, QA) inherited from an established parent software company, at boutique-agency pricing. Minimum engagement starts at $10K. Works best with clients in SaaS, Legal Tech, E-commerce, Healthcare, Financial Services.

Who should choose Siili Solutions?

A typical fit: enterprise digital transformation with an ML component.

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: Tensorway vs Siili Solutions

Your situation Recommended choice
You need full-ownership delivery on a defined project scope Tensorway
You need a large dedicated team for an ongoing programme Tensorway
Your budget is at the lower end Tensorway
You need specialist depth in a specific vertical Tensorway
You need staff augmentation or team extension Tensorway
You need consulting before committing to a build Tensorway

Use case fit: Tensorway vs Siili Solutions

Use case Tensorway fit Siili Solutions fit Winner
Building a production computer vision pipeline for document processing Strong Limited Tensorway
Deploying a customer-facing AI chatbot or LLM-integrated agent Strong Limited Tensorway
Enterprise digital transformation with an ML component Limited Strong Siili Solutions
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: Tensorway vs Siili Solutions

Tensorway (4.9/5) is the stronger overall choice for most Machine Learning Development projects. a full-stack ML delivery team (data science, MLOps, QA) inherited from an established parent software company, at boutique-agency pricing.

Siili Solutions (3.7/5) is worth a look if you need nordic-region software development and data engineering. If your situation matches that, Siili Solutions is a competitive option.

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Tensorway vs Siili Solutions FAQ

Is Tensorway better than Siili Solutions?

Tensorway (4.9/5) scores higher overall, but "better" depends on your use case. Tensorway's strongest advantage: full ML delivery stack in-house: data science, MLOps/DevSecOps, and QA under one roof. Siili Solutions's strongest advantage: publicly listed on Nasdaq Helsinki, providing financial transparency and stability signals.

How do Tensorway and Siili Solutions differ in pricing?

Tensorway uses dedicated team, fixed project, retainer, time and materials pricing with a minimum engagement of $10K. 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: Tensorway 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 Tensorway and Siili Solutions?

Tensorway's primary differentiator is: a full-stack ML delivery team (data science, MLOps, QA) inherited from an established parent software company, at boutique-agency pricing. 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 (50+ vs 501–1000), minimum engagement ($10K vs $30K), and primary industries served (SaaS, Legal Tech vs Enterprise, Telecommunications).