Best Machine Learning Development Companies in Europe

Tensorway vs STX Next: full comparison for 2026

Last updated: July 2026

Quick verdict

Tensorway (4.9/5) edges ahead of STX Next (4.3/5) overall. Tensorway is the better choice for startups and mid-market companies needing a dedicated, senior ML team without enterprise-agency overhead. STX Next is the stronger option for companies needing ML development paired with deep, large-scale Python software engineering capacity. The right choice depends on your project size, budget, and required tech stack.

Tensorway vs STX Next: head-to-head summary

Criterion Tensorway STX Next
Founded 2019 2005
HQ Alicante, Spain Poznan, Poland
Team size 11–50 201–500
Rating 4.9 / 5 4.3 / 5
Best for Startups and mid-market companies needing a dedicated, senior ML team without enterprise-agency overhead Companies needing ML development paired with deep, large-scale Python software engineering capacity
Pricing model Fixed-price PoC, Time & Material, Dedicated Team, MVP Development Dedicated team, staff augmentation, fixed project
Min. engagement $15K $25K
Primary tech stack Python, TensorFlow, PyTorch Python, Django, FastAPI
Industries served SaaS, Legal Tech, E-commerce, Healthcare, Financial Services SaaS, Fintech, Healthcare, E-commerce, Enterprise

Tensorway vs STX Next: overview

Tensorway

Tensorway is a Spain-headquartered machine learning and AI development company spun out of Anadea, a 25-year-old software engineering firm. The team of roughly 30 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 Anadea'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.

STX Next

STX Next, founded in March 2005 in Poznan, Poland, grew from an 8-person startup into a nearly 500-person Python engineering firm with delivery centers across Poland and Mexico. Known primarily as one of Europe's largest dedicated Python engineering companies, STX Next has built out AI/ML and data engineering practices on top of its deep Python bench, making it a strong generalist option for ML projects that also require broader software engineering.

Services and capabilities: Tensorway vs STX Next

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

Tech stack comparison: Tensorway vs STX Next

Framework / platform Tensorway STX Next
Python
TensorFlow
PyTorch
AWS
Azure
Kubernetes N/A

Pricing comparison: Tensorway vs STX Next

Criterion Tensorway STX Next
Minimum engagement $15K $25K
Engagement models Fixed project, Dedicated team, Time and materials, MVP development Dedicated team, Staff augmentation, Fixed project
Rate transparency Minimum disclosed Minimum disclosed
Price tier Accessible Accessible

Target audience comparison: Tensorway vs STX Next

Dimension Tensorway STX Next
Best company size Startup to mid-market Startup to mid-market
Best industries SaaS, Legal Tech, E-commerce SaaS, Fintech, Healthcare
Best use cases Building a production computer vision pipeline for document processing, Deploying a customer-facing AI chatbot or LLM-integrated agent ML feature development inside a larger Python software platform, Scaling an engineering team with dedicated Python and ML staff
Typical project type Fixed project Dedicated team

Tensorway vs STX Next: pros and cons

Tensorway
+ Full ML delivery stack in-house: data science, MLOps/DevSecOps, and QA under one roof
+ Backed by Anadea's 25-year engineering track record and hiring pipeline
+ 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 Anadea
- Public case studies are limited in number relative to larger regional players
- Smaller team size (around 30) means less capacity for very large enterprise programmes
STX Next
+ Two decades of operating history since founding in 2005 with proven scale of roughly 500 engineers
+ Deep Python engineering bench supports complex ML and software integration projects
+ Multiple delivery centers across Poland and Mexico for coverage flexibility
+ Established staff augmentation model for teams needing to scale quickly
- ML and AI is one practice among several rather than the firm's sole focus
- Larger organizational size may mean less founder-level attention than boutique specialists
- Best fit skews toward Python-centric stacks rather than polyglot ML environments

Who should choose Tensorway?

Tensorway is the right choice for startups and mid-market companies needing a dedicated, senior ML team without enterprise-agency overhead.

Full-stack ML delivery team (data science, MLOps, QA) inherited from a 25-year-old parent company, at boutique-agency pricing. Minimum engagement starts at $15K. Works best with clients in SaaS, Legal Tech, E-commerce, Healthcare, Financial Services.

Who should choose STX Next?

STX Next is the right choice for companies needing ML development paired with deep, large-scale Python software engineering capacity.

One of Europe's largest dedicated Python engineering companies, with ML and data practices built on that scale. Minimum engagement starts at $25K. Works best with clients in SaaS, Fintech, Healthcare, E-commerce, Enterprise.

Decision matrix: Tensorway vs STX Next

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 STX Next
You need consulting before committing to a build STX Next

Use case fit: Tensorway vs STX Next

Use case Tensorway fit STX Next 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
ML feature development inside a larger Python software platform Strong Strong Both equally
Scaling an engineering team with dedicated Python and ML staff Limited Strong STX Next
Fixed-price build Limited Limited Both equally
Staff augmentation Limited Strong STX Next

Verdict: Tensorway vs STX Next

Tensorway (4.9/5) is the stronger overall choice for most Machine Learning Development projects. Full-stack ML delivery team (data science, MLOps, QA) inherited from a 25-year-old parent company, at boutique-agency pricing. It is best for startups and mid-market companies needing a dedicated, senior ML team without enterprise-agency overhead.

STX Next (4.3/5) is the better choice when companies needing ML development paired with deep, large-scale Python software engineering capacity. If your situation matches those criteria, STX Next is a competitive option.

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Tensorway vs STX Next FAQ

Is Tensorway better than STX Next?

Tensorway (4.9/5) scores higher overall, but "better" depends on your use case. Tensorway is better for startups and mid-market companies needing a dedicated, senior ML team without enterprise-agency overhead. STX Next is better for companies needing ML development paired with deep, large-scale Python software engineering capacity.

How do Tensorway and STX Next differ in pricing?

Tensorway uses fixed-price poc, time & material, dedicated team, mvp development pricing with a minimum engagement of $15K. STX Next uses dedicated team, staff augmentation, fixed project pricing with a minimum engagement of $25K. Neither firm publishes a full rate card; a discovery call is required for project-specific quotes.

Which is better for enterprise: Tensorway or STX Next?

STX Next 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 STX Next?

Tensorway's primary differentiator is: full-stack ml delivery team (data science, mlops, qa) inherited from a 25-year-old parent company, at boutique-agency pricing. STX Next's primary differentiator is: one of europe's largest dedicated python engineering companies, with ml and data practices built on that scale. They also differ in team size (11–50 vs 201–500), minimum engagement ($15K vs $25K), and primary industries served (SaaS, Legal Tech vs SaaS, Fintech).

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