Definition:
Odnoklassniki, also known as OK or OK.ru, is a social network designed to connect people with friends, former classmates and family members, share content and participate in communities. Its Russian name, Одноклассники, means classmates.
Table of contents
How Odnoklassniki works
A person creates a profile and can search for contacts, follow posts or join groups. Profiles and the feed bring together activity from friends, communities and followed pages, according to each account’s settings and the platform’s recommendation systems.
Content can receive comments and reactions and circulate among contacts or within communities. Its visibility depends on the options selected by the person publishing it and the service’s distribution rules.
Main Odnoklassniki features
OK’s tools combine communication, publishing and entertainment. Its main functions include:
- Contacts and search: It enables people to find others and connect with friends, family members or former classmates.
- Posts: It supports text, photographs, videos and other content that can receive comments and reactions.
- Communities and pages: They bring together content around interests, organisations, brands or creators.
- Messaging and calls: It provides private conversations and, depending on the device and availability, voice or video calls.
- Video, live streams and music: It integrates audiovisual formats and entertainment options.
- Gifts, games and applications: It includes cards, stickers, virtual gifts and experiences developed for the OK environment.
History of Odnoklassniki
Odnoklassniki was launched in 2006 by Albert Popkov as a service for reconnecting former classmates. Over time it expanded towards communication with friends and family, communities, entertainment and audiovisual content.
Odnoklassniki is currently part of the VK ecosystem but remains a separate service from VKontakte. The two platforms share some markets and functions, but they have distinct products, communities and experiences.
Odnoklassniki reach
Odnoklassniki’s audience is concentrated particularly in Russia and other Russian-speaking markets. According to VK’s results for the second quarter of 2026, the social network recorded an average of 32.6 million monthly users in Russia.
Odnoklassniki governance
Odnoklassniki enables users to configure profile privacy and post visibility. Application permissions and the conditions governing data processing should also be reviewed. The availability of content, payments and functions may depend on the country, account, device and platform rules.
The official Odnoklassniki website provides access to the service and its current functions.