Top AI Engineer Staffing Companies

Proxify vs Addepto: full comparison for 2026

Quick verdict

Proxify (4.4/5) edges ahead of Addepto (4.0/5) overall. Proxify is the better choice for european companies that want a vetted ML or data engineer on European working hours. Addepto is the stronger option for industrial and automotive companies that need data engineers who know factory data. The right choice depends on your project size, budget, and required tech stack.

Proxify vs Addepto: head-to-head summary

Criterion Proxify Addepto
Founded 2018 2017
HQ Stockholm, Sweden Warsaw, Poland
Team size 5,000+ network members 50–249
Rating 4.4 / 5 4.0 / 5
Primary differentiator Senior-engineer interviews with live coding after an automated skills test Data and ML engineers with industrial and automotive client history
Pricing model Hourly rate per developer billed monthly; full-time or part-time; rates on request Monthly per engineer or project fee; rates on request
Min. engagement Not published Not published
Primary tech stack Python, PyTorch, TensorFlow Python, Databricks, Spark
Industries served SaaS, Fintech, E-commerce, Media, Healthcare Manufacturing, Automotive, Aviation, Retail, Logistics

Proxify vs Addepto: overview

Proxify

Proxify was founded in Stockholm in 2018 (one of its own pages says 2019) and matches companies with vetted developers across web, data, AI and DevOps. Candidates take Codility-based skills tests, then sit in-depth technical interviews with Proxify's senior engineers that include live coding and practical problems. The company quotes an acceptance rate of 1–3%, though the figure varies from page to page. Its network covers more than 5,000 professionals in over 90 countries, and it appeared on the Financial Times 1,000 list in 2025. Matching uses in-house AI tools alongside its hiring team.

Addepto

Addepto was founded in Warsaw in 2017 and works on AI, ML and data engineering, mostly for industrial and automotive clients. KMS Technology acquired it in December 2025, so it now sits inside a larger U.S.-based IT group. Addepto supplies data and ML engineers for team extension as well as running projects. The acquisition may widen its bench over time, but buyers should expect changes to contracts and account management as the integration proceeds.

Services and capabilities: Proxify vs Addepto

Capability Proxify Addepto
ML engineers ✓ ✓
LLM / GenAI engineers ✓ ✓
AI agent developers ✗ ✗
MLOps engineers ✗ ✗
Computer vision engineers ✗ ✗
NLP engineers ✗ ✗
Data engineers ✓ ✓
Engineer-led technical screen ✓ ✗
Fractional / part-time experts ✓ ✗
Trial before commitment ✗ ✗
Nearshore time-zone overlap ✗ ✗
Direct hire option ✗ ✗

Tech stack comparison: Proxify vs Addepto

Framework / platform Proxify Addepto
PyTorch ✓ ✓
TensorFlow ✓ N/A
LangChain N/A N/A
Hugging Face N/A N/A
OpenAI N/A ✓
AWS ✓ ✓
Azure ✓ ✓
Google Cloud ✓ N/A
Databricks ✓ ✓
Kubernetes N/A N/A

Pricing comparison: Proxify vs Addepto

Criterion Proxify Addepto
Minimum engagement Not published Not published
Engagement models Dedicated engineer, Fractional expert, Freelance contract Dedicated engineer, Dedicated team, Project delivery
Rate transparency Not public Not public
Price tier Mid-market Mid-market

Target audience comparison: Proxify vs Addepto

Dimension Proxify Addepto
Best company size Startup to mid-market Startup to mid-market
Best industries SaaS, Fintech, E-commerce Manufacturing, Automotive, Aviation
Best use cases Adding a data engineer to a European fintech's analytics team, Hiring a Python ML developer for a recommender system Adding a data engineer to an automotive analytics platform, Building a predictive maintenance model with a two-person team
Typical project type Dedicated engineer Dedicated engineer

Proxify vs Addepto: pros and cons

Proxify
+ Live-coding interviews with in-house senior engineers are part of the published process
+ Most of the network is in European time zones, which suits teams in the EU and UK
+ Grew fast enough to make the Financial Times 1,000 list in 2025
- AI is one of many skill areas, and there is no AI-specific test on the record
- Acceptance-rate and network-size figures differ across the company's own pages
- Developers are contractors on the platform, not Proxify employees
Addepto
+ Strong data engineering on Databricks and Azure
+ Industrial and automotive references
+ Backing from a larger group may add capacity
- Acquired by KMS Technology in December 2025, so terms and contacts may change
- Fewer computer-vision and NLP specialists than AI-research firms
- Staffing evidence is thinner than its project work

Who should choose Proxify?

A typical fit: adding a data engineer to a European fintech's analytics team.

Senior-engineer interviews with live coding after an automated skills test. Minimum engagement is not publicly disclosed. Works best with clients in SaaS, Fintech, E-commerce, Media, Healthcare.

Who should choose Addepto?

A typical fit: adding a data engineer to an automotive analytics platform.

Data and ML engineers with industrial and automotive client history. Minimum engagement is not publicly disclosed. Works best with clients in Manufacturing, Automotive, Aviation, Retail, Logistics.

Decision matrix: Proxify vs Addepto

Your situation Recommended choice
You want a working engineer, not a recruiter, to run the technical screen Proxify
You need one specialist for a few days a week Proxify
You need several engineers working as one team Both; Proxify rates higher overall
You want to test an engineer before committing Neither publishes a trial; negotiate a short first term
Your budget is at the lower end Compare: Proxify (Not published) vs Addepto (Not published)
Your team works U.S. hours Neither lists Latin American engineers; confirm overlap hours in the contract
You may want to hire the engineer permanently later Neither lists direct hire; agree conversion terms up front

Use case fit: Proxify vs Addepto

Use case Proxify fit Addepto fit Winner
Adding a data engineer to a European fintech's analytics team Strong Strong Both equally
Hiring a Python ML developer for a recommender system Strong Limited Proxify
Adding a data engineer to an automotive analytics platform Strong Strong Both equally
Building a predictive maintenance model with a two-person team Limited Strong Addepto

Verdict: Proxify vs Addepto

Proxify (4.4/5) is the stronger overall choice for most AI Engineer Staffing projects. Senior-engineer interviews with live coding after an automated skills test.

Addepto (4.0/5) is worth a look if you need building a predictive maintenance model with a two-person team. If your situation matches that, Addepto is a competitive option.

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Proxify vs Addepto FAQ

Is Proxify better than Addepto?

Proxify (4.4/5) scores higher overall, but "better" depends on your use case. Proxify's strongest advantage: live-coding interviews with in-house senior engineers are part of the published process. Addepto's strongest advantage: strong data engineering on Databricks and Azure.

How do Proxify and Addepto differ in pricing?

Proxify uses hourly rate per developer billed monthly; full-time or part-time; rates on request pricing. Addepto uses monthly per engineer or project fee; rates on request pricing. Neither firm publishes a full rate card; a discovery call is required for project-specific quotes.

Which is better for enterprise: Proxify or Addepto?

Addepto 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 Proxify and Addepto?

Proxify's primary differentiator is: senior-engineer interviews with live coding after an automated skills test. Addepto's primary differentiator is: data and ML engineers with industrial and automotive client history. They also differ in team size (5,000+ network members vs 50–249), minimum engagement (Not published vs Not published), and primary industries served (SaaS, Fintech vs Manufacturing, Automotive).

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