🥇

DrivenData

Data science competitions for social good, focusing on real-world problems

Social Impact Real Problems Cash Prizes
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🎯

Zindi

Africa's largest data science competition platform with challenges and hackathons

African Focus Hackathons Prizes
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💻

Analytics Vidhya

Indian data science platform with hackathons, practice problems, and courses

Hackathons Practice Problems Courses
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🚀

HackerEarth

Machine learning challenges and hackathons for developers and data scientists

ML Challenges Hackathons Recruitment
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📊

DataHack

Data science competitions and practice problems by Analytics Vidhya

Practice Problems Competitions Leaderboards
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🎓

CrowdANALYTIX

Data science competitions with focus on business problems and analytics

Business Problems Analytics Prizes
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🔬

OpenML

Open machine learning platform with datasets, tasks, and benchmarking

Open Source Benchmarking Datasets
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🏅

Topcoder

Competitive programming and data science challenges with cash prizes

Data Science Algorithm Cash Prizes
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🌐

AIcrowd

Open innovation platform for AI and machine learning challenges

AI Challenges Open Innovation Research
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📈

Signate

Japanese data science competition platform with various ML challenges

Japanese Market ML Challenges Prizes
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🎮

Codabench

Reproducible research platform for benchmarking ML models and algorithms

Benchmarking Reproducibility Research
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Platform Comparison

Platform Focus Prizes Difficulty
Kaggle General ML/DS High Beginner to Expert
DrivenData Social Good Medium Intermediate
Zindi African Problems Medium Beginner to Intermediate
Analytics Vidhya General ML/DS Medium Beginner to Advanced
AIcrowd AI Research High Advanced

💡 Tips for Choosing Competitions

Start with Beginner-Friendly: If you're new, start with platforms that have tutorials and beginner competitions.
Match Your Interests: Choose competitions in domains you're passionate about (healthcare, finance, NLP, CV, etc.).
Consider Time Commitment: Some competitions last weeks, others are quick hackathons. Pick based on your schedule.
Learn from Winners: Many platforms share winning solutions - study them to improve your skills.
Build Your Portfolio: Use competitions to build a portfolio that showcases your skills to employers.