Andreessen Horowitz

LayerZero Labs is a developer of a blockchain messaging protocol that enables decentralized applications to operate across multiple blockchains. The company's platform facilitates data exchange and interoperability by connecting disparate blockchains, offering a streamlined solution for cross-chain applications. Utilizing an on-chain light node for validation, LayerZero improves speed, security, and cost-efficiency, as it streams block headers on-demand through decentralized oracles rather than maintaining all headers sequentially. This innovative approach allows clients to efficiently implement low-level communication primitives necessary for cross-chain functionality.

Towns is an on-chain messaging platform co-founded by the creator of Houseparty and Meerkat.

Memora Health Inc., founded in 2016 and based in San Francisco, California, develops an enterprise healthcare productivity platform aimed at automating outpatient communication and enhancing care delivery. The company partners with health systems, health plans, and digital health organizations to streamline clinical workflows, allowing clinicians to focus on their primary responsibilities while proactively engaging patients throughout their care journeys. Memora's platform digitizes high-touch processes, intelligently triaging patient-reported data to the relevant care team members and facilitating proactive, two-way communication between patients and providers. By transforming the way care is delivered, Memora Health seeks to make healthcare more actionable, accessible, and continuous.

Memora Health Inc., founded in 2016 and based in San Francisco, California, develops an enterprise healthcare productivity platform aimed at automating outpatient communication and enhancing care delivery. The company partners with health systems, health plans, and digital health organizations to streamline clinical workflows, allowing clinicians to focus on their primary responsibilities while proactively engaging patients throughout their care journeys. Memora's platform digitizes high-touch processes, intelligently triaging patient-reported data to the relevant care team members and facilitating proactive, two-way communication between patients and providers. By transforming the way care is delivered, Memora Health seeks to make healthcare more actionable, accessible, and continuous.

Memora Health Inc., founded in 2016 and based in San Francisco, California, develops an enterprise healthcare productivity platform aimed at automating outpatient communication and enhancing care delivery. The company partners with health systems, health plans, and digital health organizations to streamline clinical workflows, allowing clinicians to focus on their primary responsibilities while proactively engaging patients throughout their care journeys. Memora's platform digitizes high-touch processes, intelligently triaging patient-reported data to the relevant care team members and facilitating proactive, two-way communication between patients and providers. By transforming the way care is delivered, Memora Health seeks to make healthcare more actionable, accessible, and continuous.

Keybase, Inc. is a New York-based company that provides an open-source platform for secure communication and file sharing. Founded in 2015, Keybase offers end-to-end encrypted messaging, allowing users to encrypt, decrypt, and share messages using a proven encryption standard. Its solutions enable users to sign, verify, and manage messages and files, while also integrating public keys with user accounts across its platform and connected services like Twitter and GitHub. The platform supports various operating systems, including Android, iOS, and Windows, facilitating secure communication and collaboration among users. As of May 2020, Keybase operates as a subsidiary of Zoom Video Communications.

Slack Technologies, Inc., established in 2009 and headquartered in San Francisco, operates a cloud-based communication and collaboration platform, Slack. This platform facilitates team messaging, file sharing, and integration with various business tools, catering to a wide range of industries, from startups to large enterprises. Slack's software-as-a-service model enables real-time communication and data sharing, aiming to increase organizational efficiency and productivity.

App.net is an ad-free, subscription-based social networking and development platform launched in August 2012. Owned and operated by Mixed Media Labs, founded by CEO Dalton Caldwell and CTO Bryan Berg, the platform serves as a backbone for the social web, allowing developers to create applications while providing users with tools for meaningful interactions. App.net offers a range of social applications, including group messaging, photo and document sharing, and microblogging, all designed to enhance user engagement without the distraction of advertisements.

MessageMe is a mobile messaging application designed to enhance communication through personalized and emotionally engaging interactions. The platform focuses on creating a fun and lightweight user experience, encouraging users to send and respond to messages in a dynamic manner. By applying techniques from social gaming, MessageMe aims to enrich the emotional context of messaging, thereby increasing user engagement and excitement. The company has attracted interest from major players in the tech industry, including Snapchat and Truecaller. Ultimately, MessageMe was acquired by Yahoo for a sum estimated between $30 million and $40 million, reflecting its potential in the competitive messaging app landscape.

Talkray is a developer of a mobile communication application that transforms smartphones into walkie-talkies, allowing users to make free calls and engage in chat. The application is available for download on both Android and iPhone platforms. In addition to voice communication, Talkray enables users to share photos, videos, and locations, facilitating a more connected experience with friends and family. The app prioritizes ease of use and accessibility, making it a versatile tool for maintaining personal connections.

MessageMe is a mobile messaging application designed to enhance communication through personalized and emotionally engaging interactions. The platform focuses on creating a fun and lightweight user experience, encouraging users to send and respond to messages in a dynamic manner. By applying techniques from social gaming, MessageMe aims to enrich the emotional context of messaging, thereby increasing user engagement and excitement. The company has attracted interest from major players in the tech industry, including Snapchat and Truecaller. Ultimately, MessageMe was acquired by Yahoo for a sum estimated between $30 million and $40 million, reflecting its potential in the competitive messaging app landscape.

Tomfoolery is a mobile app lab founded by ex-Yahoo and AOL execs committed to making enterprise solutions more consumer-friendly. Its debut app is the conversation platform Anchor. Anchor allows users to share files from Box.com and Dropbox, syncs with Evernote, and lets companies create company directories on the platform — a listing of all employees who are on Anchor — which can be used to find email and phone details, as well as link for chatting.

Plivo Inc. is a cloud communication platform that provides SMS and voice call solutions for businesses globally. Founded in 2011 and based in San Francisco, the company offers a range of services including Voice API, which enables voice capabilities in web and mobile applications, and SMS API for text messaging integration. Plivo also provides SMS Short Codes for bulk messaging, a WebRTC SDK for in-browser voice calls, and a Mobile SDK to incorporate voice calls in iOS and Android apps. In addition, it offers Salesforce Integration for enhancing communication within Salesforce applications and an open-source framework for prototyping voice call applications. With direct relationships with over 1,600 local carrier networks, Plivo ensures reliable connectivity in 195 countries, making it a cost-effective solution for modernizing business communications.

Airtime is a social platform designed to foster genuine online interactions, aiming to create a welcoming environment for users. Founded by Sean Parker, the platform offers various virtual "rooms" where individuals can engage in live conversations about diverse interests, from music to art and comedy. Unlike traditional social networks that often promote isolation, Airtime encourages community building and real-time engagement. The company is supported by prominent investors, including Accel, Andreessen Horowitz, and Google Ventures, and operates with a dedicated team of over 100 employees across three locations. Airtime focuses on enhancing the quality of online social experiences through its innovative video conversation features.

Flotype Inc. is a venture-backed company building a suite of enterprise technology for real-time messaging. Flotype takes a unique approach by building developer-friendly technologies focused on ease-of-use and simplicity, while still exceeding enterprise-grade performance expectations. Flotype licenses enterprise-grade middleware, Bridge, to customers ranging from social web and software enterprises to financial and fleet management groups. Other offerings include NowJS, a free, open-source framework, for developers seeking real-time interactivity on Node.js and JavaScript browsers. NowCluster is available for companies seeking scalability and reliability for NowJS applications. Established in 2010 and based in Berkeley, California, Flotype is venture-backed by Andreessen Horowitz, Ignition Partners, InterWest Partners, and Salesforce.com.

Slack Technologies, Inc., established in 2009 and headquartered in San Francisco, operates a cloud-based communication and collaboration platform, Slack. This platform facilitates team messaging, file sharing, and integration with various business tools, catering to a wide range of industries, from startups to large enterprises. Slack's software-as-a-service model enables real-time communication and data sharing, aiming to increase organizational efficiency and productivity.

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.

Slack Technologies, Inc., established in 2009 and headquartered in San Francisco, operates a cloud-based communication and collaboration platform, Slack. This platform facilitates team messaging, file sharing, and integration with various business tools, catering to a wide range of industries, from startups to large enterprises. Slack's software-as-a-service model enables real-time communication and data sharing, aiming to increase organizational efficiency and productivity.

Skype, founded in 2003 and headquartered in Luxembourg, is a division of Microsoft Corp. It specializes in providing a unified communications platform that enables users to engage in voice, video calls, and instant messaging over the internet. Skype's services, which include text, voice, and video functionalities, facilitate real-time collaboration and communication, making it suitable for both personal and professional use. The platform offers free basic services, such as one-to-one and group calls, and also provides paid options for additional features like calling landlines, accessing WiFi, or sending texts. Skype's user-friendly interface and cross-platform compatibility make it accessible on various devices, including computers, smartphones, and TVs with Skype integration.