| Name | URL | Description (verbatim from Crunchbase unless otherwise linked) | Monthly Active Users (as of 2019 unless otherwise noted) | % Republican/ % Democrat say they use this site | Stock Symbol / private | investments total valuation | # investors | # acquisitions | date acquired | Date IPO | IPO or acquisition date valuation | # team members | Founded | ~ years from founding to IPO or acquisition | Mean time to exit, years | Investment per monthly active user | Median investment per monthly active user, N=20 |
| https://www.facebook.com/ | Facebook is an online social networking service that enables its users to connect with friends and family. | 2.23B | 76/76 | NASDAQ FB | $16.1B | 38 | 89 | 2012 | $13.8B | 1,006 | 2004 | 8 | 6.5 | $7.22 | $3.24 | ||
| YouTube | https://www.youtube.com/ | YouTube, a video-sharing platform, allows users to upload, view, and share videos, including movie and music clips and amateur content. Acquired by Google. | 1.9B | 91/97 | private | $83.5M | 2 | 4 | 2006 | 111 | 2005 | 1 | |||||
| https://www.whatsapp.com/ | WhatsApp is a proprietary, cross-platform, free instant messaging subscription service for smartphones. Acquired by Facebook | 1.5B | 20/35 | private | $60.3M | 1 | 2014 | $19B | 15 | 2009 | 5 | ||||||
| Messenger | https://www.messenger.com/ | Messenger is a mobile application that works with its users’ data plan. Suborganization of Facebook. | 1.3B | private | 2011 | ||||||||||||
| WeChat (part of Tencent) | https://www.wechat.com/en/ | WeChat provides mobile text and voice messaging communication services. | 1.06B | private | 2016 | 5 | 2012 | ||||||||||
| https://www.instagram.com/ | Instagram is a free photo-sharing application that enables its users to take photos, apply filters, and share them on social networks. | 1B | 45/68 | Acquired by Facebook | $57.5M | 10 | 2012 | $1B | 63 | 2010 | 2 | ||||||
| QQ International | https://www.imqq.com/ | QQ International is an application that supports multi-user HD video calls, multimedia group streaming, and live chat translations. | 861M | private | 2010 | ||||||||||||
| Tumblr | https://www.tumblr.com/ | Tumblr, a microblogging platform and social networking website, enables users to post multimedia and other content to a short-form blog. | 642M | private | $125.3M | 14 | 8 | 2007 | $0.19.5 | ||||||||
| Qzone (Tencent) | https://qzone.qq.com/ | Qzone is another popular social networking platform based in China, where users can upload multimedia, write blogs, play games, and decorate their own virtual spaces. | 632M | private | 1 | 2011 | |||||||||||
| TikTok ("Douyin" in China, a part of ByteDance) | https://www.tiktok.com/ | TikTok is a short-video sharing app and social network platform that develops a lip-syncing video application to create videos. Suborganization of ByteDance | 500M | 27/35 | private | 2 | 2020 | 26 | 2003 | 17 | |||||||
| Kuaishou | https://www.kuaishou.com/en | Through the sharing of short videos, and live streams powered by big data and AI technology, Kuaishou is designed to elevate the often overlooked, yet diverse, vibrant and energetic communities of people in China. Meanwhile, every user on Kuaishou can also virtually experience our beautiful world. | 481M | NYSE:ZH and HKG:1024.HK | $4.4B | 9 | 4 | 2021 | $150B | 2011 | 10 | ||||||
| Sina Weibo | https://www.weibo.com/l | Weibo is a social media platform for microblogging. | 392M | NASDAQ:WB | $1.3B | 1 | 2014 | 3 | 2009 | 5 | |||||||
| https://twitter.com/ | Twitter is a social networking platform that allows its users to send and read micro-blogs of up to 280-characters known as tweets plus short videos. | 335M | 26/43 | NYSE:TWTR | $1.5B | 8 | 63 | 2013 | $24.6B | 193 | 2006 | 7 | $4.54 | ||||
| https://www.reddit.com/ | Reddit is an online platform that enables users to submit links, create content, and have discussions about the topics of their interest. Suborganization of https://www.redditinc.com/ | 330M | 19/33 | private | $919M | 27 | 3 | 31 | 2005 | $2.78 | |||||||
| Baidu Tieba | http://tieba.baidu.com/ | Baidu offers functional online search, Tieba community search, industry-based vertical search, mp3 search, portal channels, and instant messaging services. Its products include Baidu Webpage, Baidu Video, Baidu Map,hao123.com, BaiduPedia, Baidu Input, Baidu Toolbar, TTPlayer, Iqiyi, and Sky Software. | 300M | HKG: 9888 | $3.1B | 10 | 15 | 2005 | 49 | 1999 | 6 | ||||||
| Quora | https://www.quora.com/ | Quora is a Q&A platform with a mission to share and grow the world's knowledge. | 300M | $226M | 15 | 1 | 2009 | $10.33 | |||||||||
| https://www.linkedin.com/ | LinkedIn is a professional networking site that allows its members to create business connections, search jobs, and find potential clients. Acquired by Microsoft. | 294M | 29/44 | NYSE:LNKC delisted after acquisition | $154.8M | 13 | 24 | 2016 | 2011 | $26.2B at acquisition | 287 | 2003 | 8 | ||||
| Viber | https://www.viber.com/en/ | Free and secure calls and messages to anyone, anywhere. Keep your conversations going no matter where you are. | 260M | 2010 | |||||||||||||
| Snapchat | https://www.snapchat.com/ | Snapchat is one of the most popular social networking apps in developed regions such as North America and Europe. | 255M | 37/43 | private | $60M | 1 | 11 | 2011 | $0.23 | |||||||
| https://www.pinterest.com/ | Pinterest is a visual bookmarking tool for saving and discovering creative ideas. | 250M | 32/38 | NYSE:PINS | $1.5B | 44 | 2019 | $12.7B | 119 | 2009 | 10 | $6 | |||||
| Vimeo | https://vimeo.com/ | Vimeo is the world’s leading all-in-one video software solution. We enable professional-quality video for all. | 240M | private | $450M | 4 | 5 | 2004 | $1.88 | ||||||||
| Line | https://line.me/en/ | Line is a multi-purpose social messaging app that allows users to message, share stickers, play games, make payments, request for taxis, and shop online. It is the most popular messaging app in Japan and is also popular in other areas in Asia. | 203M | ||||||||||||||
| Telegram Messenger | https://telegram.org/ | Telegram is a cloud-based mobile and desktop messaging app with a focus on privacy, security, and speed. | 200M | private | $1B | 2 | 5 | 2013 | $5.00 | ||||||||
| Discord | https://discord.com/ | Discord is a free voice, video, and text chat app that's used by tens of millions of people ages 13+ to talk and hang out with their communities and friends. People use Discord daily to talk about many things, ranging from art projects and family trips to | 140M | private | $479.3M | 20 | 1 | 2012 | $3.42 | ||||||||
| SoundCloud | https://soundcloud.com/ | SoundCloud is a social sound platform where anyone can create and share sounds. | 75M | private | 542.8M | 17 | 2 | 20 | 2007 | $7.24 | |||||||
| Academia sheet3 | https://www.academia.edu/ | Academia.edu is a platform for academics to share research papers. | 70M | private | $38.8M | 11 | 2 | 2008 | $0.55 | ||||||||
| Stack Overflow | https://stackoverflow.com/ | Stack Overflow is a platform for developers and programmers to share knowledge and solve coding challenges | 50M | private | $153M | 18 | 2021 | $1.8B | 2008 | $3.06 | |||||||
| DeviantArt | https://www.deviantart.com | DeviantArt is an online art gallery and community creating the cultural context for how art is created, discovered, and shared. | 45M | private | 14.5M | 3 | 2017 | $36M | 2000 | 3 | $0.32 | ||||||
| Nextdoor | https://nextdoor.com/ | It's where communities come together to greet newcomers, exchange recommendations, and read the latest local news. Where neighbors support local businesses and get updates from public agencies. Where neighbors borrow tools and sell couches. | 27M | 12/16 | $479.3M | 2010 | $17.75 | ||||||||||
| Triller | https://triller.co/ | Triller is an AI-powered music video app that enables anyone to make professional videos, effortlessly. | 25M | $33M | 7 | 3 | 2015 | $1.32 | |||||||||
| ReverbNation | https://www.reverbnation.com/ | ReverbNation connects Artists to the Music Industry. | 12.3M | private | $8.6M | 3 | 3 | 2006 | $7.00 | ||||||||
| Houseparty | https://houseparty.com/ | Houseparty is a face-to-face social network that brings empathy to online communication. | 10.3M | private | $70.2M | 35 | 2019 | ? | 2016 | 3 | |||||||
| Twitch | https://www.twitch.tv/ | Twitch is a social video platform where gamers can broadcast, watch, and talk about video games. | 9.2M | private | $35M | 9 | 6 | 2007 | $3.80 | ||||||||
| Parler | https://parler.com/ | Parler is a relatively new social media platform. | 4M (in Dec. 2020) | private | 1 | 2018 | |||||||||||
| Gab | https://gab.com/ | Gab gives users the power to leverage their social network to find and make recommendations. | 3.7M in April 2020. | private | 1 | 2012 | |||||||||||
| Caffeine | https://www.caffeine.tv/ | Caffeine is a new kind of broadcast company focused on the creation and distribution of live, interactive content. | 1M | private | $294M | 8 | 2016 | $294 | |||||||||
| Goodreads | https://www.goodreads.com/ | Goodreads is a mobile and web app that allows its users to find, share, recommend, read, and review the books they like. | 1M | private | $2.8M | 9 | 1 | 2013 | $150M | 2007 | 6 | $2.80 | |||||
| Yubo | https://yubo.live/ | Yubo, the social platform where Generation Z creates communities of friends around the world | 117K | private | $65.7M | 11 | 2015 | $0.56 | |||||||||
| Meetup | https://www.meetup.com/ | Meetup brings people together in thousands of cities to do more of what they want to do in life. | 54K (weekly) | private | $18.3M | 9 | 1 | 2002 | |||||||||
| Researchgate | https://www.researchgate.net/ | ResearchGate provides a professional network for the scientific community to connect with each other to share and discuss research. | 20M | private | $87.6M | 22 | 1 | 2008 | $4.38 |
GJP2.0 COVID-19 Forecasting Tournament Top 10 Best Final Forecasts
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