Andreessen Horowitz

Post News is a platform that publishes news and encourages independent writers.

Autograph offers a platform for fans to engage with sports, entertainment, and cultural content through personalized digital experiences. It aggregates multimedia content like podcasts, blogs, videos, and social posts tailored to users' favorite teams and creators. Autograph also provides digital collectibles and curated experiences in collaboration with athletes, entertainers, and brands.

Substack operates a subscription-based publishing platform that enables writers to create, publish, and monetize newsletters. The platform supports both free and paid subscriptions and allows content to be published to a reader email list and a website. It includes editing tools and templates to design newsletters and handles subscriber payments, aiming to simplify monetization and direct engagement between writers and readers. Substack focuses on selling subscriptions without advertisements, helping independent writers build audience relationships and revenue streams. The company was founded in 2017 and is based in San Francisco, California.

Substack operates a subscription-based publishing platform that enables writers to create, publish, and monetize newsletters. The platform supports both free and paid subscriptions and allows content to be published to a reader email list and a website. It includes editing tools and templates to design newsletters and handles subscriber payments, aiming to simplify monetization and direct engagement between writers and readers. Substack focuses on selling subscriptions without advertisements, helping independent writers build audience relationships and revenue streams. The company was founded in 2017 and is based in San Francisco, California.

Medium is a social publishing platform that enables writers to publish articles and reach readers through a built-in distribution network. The service provides simple creation tools and a personalized feed, allowing readers to follow people and topics and engage by highlighting, recommending, or commenting on posts. Founded in 2012 by Evan Williams and headquartered in San Francisco, Medium brings together engineers, editors, and creators to blend technology with storytelling. It supports a wide range of topics, from technology and politics to culture and personal development, fostering a community-driven environment where ideas can be shared and discussed.

Medium is a social publishing platform that enables writers to publish articles and reach readers through a built-in distribution network. The service provides simple creation tools and a personalized feed, allowing readers to follow people and topics and engage by highlighting, recommending, or commenting on posts. Founded in 2012 by Evan Williams and headquartered in San Francisco, Medium brings together engineers, editors, and creators to blend technology with storytelling. It supports a wide range of topics, from technology and politics to culture and personal development, fostering a community-driven environment where ideas can be shared and discussed.

Genius Media Group, Inc. operates an online platform that focuses on music intelligence, originally starting as a site for annotating rap lyrics. Founded in 2009 and based in Brooklyn, New York, Genius has evolved to serve a broader audience, providing insights into various music genres beyond hip-hop. The platform attracts over 100 million users monthly, enabling contributors, editors, and musicians to engage in discussions about songs and share their interpretations with a global fan base. In addition to lyrics, Genius features charts and videos, offering a comprehensive view of music and its cultural significance. Renowned artists, including Frank Ocean and Lin-Manuel Miranda, also participate in the platform, contributing their perspectives and enhancing the storytelling aspect of music.

Imgur, Inc. is an online platform that specializes in image hosting and sharing services, founded in 2009 and based in San Francisco, California. The platform allows users to share a variety of visual content, including photos, memes, GIFs, and visual stories, fostering engagement with social networks and online communities. Imgur's services are designed to entertain and inspire users, providing an endless stream of humorous, informative, and creative images from around the globe. The company focuses on delivering a user-friendly experience that promotes visual storytelling and community interaction.

App.net is an ad-free, subscription-based social networking and development platform that was launched in August 2012. Owned and operated by Mixed Media Labs, which was founded by CEO Dalton Caldwell and CTO Bryan Berg, the company aims to serve as the backbone of the social web. App.net provides a robust infrastructure that enables developers to create various social applications, including group messaging, photo and document sharing, and microblogging. The platform focuses on facilitating meaningful interactions among its members while maintaining a commitment to an uninterrupted user experience free from advertisements.

Genius Media Group, Inc. operates an online platform that focuses on music intelligence, originally starting as a site for annotating rap lyrics. Founded in 2009 and based in Brooklyn, New York, Genius has evolved to serve a broader audience, providing insights into various music genres beyond hip-hop. The platform attracts over 100 million users monthly, enabling contributors, editors, and musicians to engage in discussions about songs and share their interpretations with a global fan base. In addition to lyrics, Genius features charts and videos, offering a comprehensive view of music and its cultural significance. Renowned artists, including Frank Ocean and Lin-Manuel Miranda, also participate in the platform, contributing their perspectives and enhancing the storytelling aspect of music.

Hyperink, Inc. is a self-publishing platform based in San Francisco, California, that enables individuals to publish eBooks across various categories, including biographies, self-help, technology, and more. Founded in 2010, the company offers services such as cover design, layout, and customer support to streamline the publishing process for users. Hyperink's platform allows writers and bloggers to curate and compile their existing content into cohesive books, transforming blogs and articles into published works. The company distributes its eBooks through its own website as well as other online retailers, aiming to democratize the publishing process and empower individuals to share their knowledge and stories with a wider audience.

Twitter is a social networking platform that facilitates the exchange of micro-blogs, known as "tweets," which can be up to 280 characters in length. Launched in 2006, it allows users to send and read tweets through various means, including web browsers, SMS, and mobile applications. With over 400 million monthly visitors and 255 million active users, Twitter serves as a global real-time communications platform. Its diverse user base includes world leaders, athletes, entertainers, and news organizations, contributing to its role as a significant source of information and engagement. The platform is available in more than 35 languages and has a strong presence in major cities worldwide, with headquarters in San Francisco and offices across the United States and internationally.