Yandex and Google are two largest search services dominating their regions. Founders: Arkady Volozh and Ilya Segalovich founded Yandex in 1997, while Larry Page and Sergey Brin launched Google in 1998. Both companies started with search technologies but quickly expanded.

Search Technologies: Yandex uses its own algorithm Matrixnet and handles regional queries, while Google uses neural networks RankBrain and BERT, focusing on semantic search. Both process billions of queries per day.

Additional Services: Yandex offers Yandex.Maps, Music, Taxi, Market, and Mail. Google has YouTube, Gmail, Google Maps, Drive, and Play Store. Both have built ecosystems, but Google is more global, while Yandex is focused on Russia.

Market Share: In Russia, Yandex holds about 60% of the search market, Google about 40% and growing via mobile devices. Worldwide, Google dominates with over 90%, while Yandex is mainly in Russia and CIS.

Monetization: Main revenue source is advertising. Yandex.Direct and Google Ads offer contextual and targeted ads. Google also earns from cloud services and apps, Yandex from taxi and delivery.

Work Principles: Yandex emphasizes local results and Russian-language content, while Google focuses on speed, relevance, and neutrality. Both use artificial intelligence to improve search.

Conclusion: Yandex is better adapted for Russian-speaking audience, while Google is universal and global. Choice depends on region and user needs.