Best Machine Learning Development Companies in Europe

STX Next vs CodeLeap: full comparison for 2026

Last updated: July 2026

Quick verdict

STX Next (4.3/5) edges ahead of CodeLeap (3.9/5) overall. STX Next is the better choice for companies needing ML development paired with deep, large-scale Python software engineering capacity. CodeLeap is the stronger option for early-stage and growth-stage startups wanting fast, founder-friendly AI feature development. The right choice depends on your project size, budget, and required tech stack.

STX Next vs CodeLeap: head-to-head summary

Criterion STX Next CodeLeap
Founded 2005 2019
HQ Poznan, Poland London, UK
Team size 201–500 11–50
Rating 4.3 / 5 3.9 / 5
Best for Companies needing ML development paired with deep, large-scale Python software engineering capacity Early-stage and growth-stage startups wanting fast, founder-friendly AI feature development
Pricing model Dedicated team, staff augmentation, fixed project Fixed project, dedicated team
Min. engagement $25K $15K
Primary tech stack Python, Django, FastAPI Python, React, Node.js
Industries served SaaS, Fintech, Healthcare, E-commerce, Enterprise SaaS, E-commerce, Fintech

STX Next vs CodeLeap: overview

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.

CodeLeap

CodeLeap, registered as Codeleap Ltd in England, was founded in 2019 and is headquartered in London, UK. The agency works closely with startups and growth-stage companies to build digital products with AI features, positioning itself around speed and a founder-friendly delivery model rather than large-scale enterprise engagement.

Services and capabilities: STX Next vs CodeLeap

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

Tech stack comparison: STX Next vs CodeLeap

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

Pricing comparison: STX Next vs CodeLeap

Criterion STX Next CodeLeap
Minimum engagement $25K $15K
Engagement models Dedicated team, Staff augmentation, Fixed project Fixed project, Dedicated team
Rate transparency Minimum disclosed Minimum disclosed
Price tier Accessible Accessible

Target audience comparison: STX Next vs CodeLeap

Dimension STX Next CodeLeap
Best company size Startup to mid-market Startup to mid-market
Best industries SaaS, Fintech, Healthcare SaaS, E-commerce, Fintech
Best use cases ML feature development inside a larger Python software platform, Scaling an engineering team with dedicated Python and ML staff Adding an AI feature to an early-stage startup product, Fast MVP development with an embedded ML component
Typical project type Dedicated team Fixed project

STX Next vs CodeLeap: pros and cons

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
CodeLeap
+ Legally registered in England with a London-based, client-facing team
+ Founder-friendly delivery model designed specifically around startup speed and iteration
+ Lower minimum engagement size than most enterprise-oriented firms on this list
+ Focused specifically on AI-featured digital product builds rather than broad enterprise IT
- Founded in 2019, one of the newer and smaller firms on this list with a shorter track record
- Small team size of 11 to 50 limits capacity for large, multi-workstream programmes
- Less suited to heavily regulated enterprise ML programmes than larger specialist firms

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.

Who should choose CodeLeap?

CodeLeap is the right choice for early-stage and growth-stage startups wanting fast, founder-friendly AI feature development.

Founder-friendly, speed-oriented delivery model built specifically for startup-stage product timelines. Minimum engagement starts at $15K. Works best with clients in SaaS, E-commerce, Fintech.

Decision matrix: STX Next vs CodeLeap

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

Use case fit: STX Next vs CodeLeap

Use case STX Next fit CodeLeap fit Winner
ML feature development inside a larger Python software platform Strong Strong Both equally
Scaling an engineering team with dedicated Python and ML staff Strong Limited STX Next
Adding an AI feature to an early-stage startup product Limited Strong CodeLeap
Fast MVP development with an embedded ML component Limited Strong CodeLeap
Fixed-price build Limited Limited Both equally
Staff augmentation Strong Limited STX Next

Verdict: STX Next vs CodeLeap

STX Next (4.3/5) is the stronger overall choice for most Machine Learning Development projects. One of Europe's largest dedicated Python engineering companies, with ML and data practices built on that scale. It is best for companies needing ML development paired with deep, large-scale Python software engineering capacity.

CodeLeap (3.9/5) is the better choice when early-stage and growth-stage startups wanting fast, founder-friendly AI feature development. If your situation matches those criteria, CodeLeap is a competitive option.

Related comparisons

STX Next vs CodeLeap FAQ

Is STX Next better than CodeLeap?

STX Next (4.3/5) scores higher overall, but "better" depends on your use case. STX Next is better for companies needing ML development paired with deep, large-scale Python software engineering capacity. CodeLeap is better for early-stage and growth-stage startups wanting fast, founder-friendly AI feature development.

How do STX Next and CodeLeap differ in pricing?

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

Which is better for enterprise: STX Next or CodeLeap?

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 STX Next and CodeLeap?

STX Next's primary differentiator is: one of europe's largest dedicated python engineering companies, with ml and data practices built on that scale. CodeLeap's primary differentiator is: founder-friendly, speed-oriented delivery model built specifically for startup-stage product timelines. They also differ in team size (201–500 vs 11–50), minimum engagement ($25K vs $15K), and primary industries served (SaaS, Fintech vs SaaS, E-commerce).

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