Ok
2 known investors
Odnoklassniki (OK.ru) is a social networking service where users connect with friends, share posts, and access media and entertainment content. It is part of the VK group of services and offers features such as messaging, media sharing, and TV programming, primarily for Russian-speaking users.
Also known as Odnoklassniki · OK · OK.ru · Одноклассники
Investors · 2
Company profile
researched Aug 2026Odnoklassniki (Russian: Одноклассники, 'Classmates'), abbreviated OK or OK.ru, is a social networking and online video sharing service used primarily in Russia and other former Soviet republics. Launched on 4 March 2006 by Albert Popkov, it is owned by VK and is available in 13 languages, including Russian, Ukrainian, Kazakh, Kyrgyz, Uzbek, Azerbaijani, Armenian, Georgian, Tajik, Turkish, Romanian, German and English. Registration is required but free of charge; paid registration was discontinued on 31 August 2010.
The platform combines a friends-and-family social feed with themed communities, photo and video sharing, a short-video feed, music, games, gifts and free voice and video calls supporting up to 100 participants. Additional features introduced over time include the OK Messages messenger, live broadcasts in communities, an OK Video app for Smart TV, a recommendations service, expanded emoticons beyond the "Class" button, and advertising accounts for small businesses and content creators. The website is operated by LLC VK and is surrounded by adjacent VK services such as Mail, Cloud, Calendar, Notes, VK Calls, TV listings, weather, horoscopes, sports and VK Reklama. The Android application, published under the package name ru.ok.android by developer VKL, is distributed free of charge and requires Android 7.0 or higher.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Timeline · 9
launches, deals, and filingsVersion 26.8.20 of the OK RU Android app was published, requiring Android 7.0 or higher.
Ukrainian President Petro Poroshenko signed a decree banning Mail.ru and its social networks, including Odnoklassniki and VKontakte, as part of sanctions on Russia.
Odnoklassniki reverted to a free model and discontinued user registration fees; no payment has been needed since 31 August 2010.
British company I-CD accused Popkov of copyright infringement over similarities to its social network Passado; after the first day of trial at the Royal Courts of Justice, I-CD dropped all charges following an undisclosed settlement. Popkov was dismissed as managing director.
New users were required to pay an SMS fee to activate accounts and unlock core features such as posting, uploading or rating photos and commenting; the measure was followed by a decline in popularity as users moved to VKontakte.
Albert Popkov sold a controlling stake in Odnoklassniki to Digital Sky Technologies (DST), owner of Mail.ru; DST and its subsidiary Forticom acquired a 58% stake.
The social networking site was launched by Albert Popkov, who developed it initially as a hobby project.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
▸Research sources · 8
primary sources listed
- Okok.ru · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Ok do?
- Odnoklassniki (OK.ru) is a Russian-language social network and video-sharing platform owned by VK.
- Who are Ok's investors?
- Ok's investors include RubyLight, Trind Ventures.