Software companies based in California

Yahoo (, styled 'yahoo!''''' in its logo) is an American web portal that provides the search engine Yahoo Search and related services including My Yahoo, Yahoo Mail, Yahoo News, Yahoo Finance, Yahoo Sports, y!entertainment, yahoo!life, and its advertising platform, Yahoo Native. It is operated by the namesake company Yahoo! Inc., which is 90% owned by Apollo Global Management and 10% by Verizon.

Perplexity AI, Inc., or simply Perplexity, is an American privately held software company offering a web search engine that processes user queries and synthesizes responses. Perplexity products use large language models and incorporate real-time web search capabilities, providing responses based on current Internet content, citing sources used. Its real-time search engine is called Sonar and is based on Meta's Llama model. A free public version is available, while a paid Pro subscription offers access to more advanced language models and additional features.

Magento is an open-source e-commerce platform written in PHP. Magento source code is distributed under the Open Software License. Magento was acquired by Adobe Inc in May 2018 for $1.68 billion.

Environmental Systems Research Institute, Inc., doing business as Esri (), is an American geographic information system (GIS) software company headquartered in Redlands, California. It is best known for its ArcGIS products. With 45% market share as of 2015, Esri is one of the world's leading suppliers of GIS software, web GIS, local intelligence, and geodatabase management applications.

American information technology company

Firebase was a company that developed backend software. It was founded in San Francisco in 2011 and was incorporated in Delaware.

productivity software

American company

SugarCRM is a software company based in Silicon Valley. It produces the on-premises and cloud-based web application Sugar, a customer relationship management (CRM) system.

Teradata Corporation is an American software company that provides cloud database and analytics-related software, products, and services. The company was formed in 1979 in Brentwood, California, as a collaboration between researchers at Caltech and Citibank's advanced technology group.

internet portal

software company based in Santa Cruz, California

American software company

company

RhythmOne , a subsidiary of Nexxen, is an American digital advertising technology company that owns and operates the web properties AllMusic, AllMovie, and SideReel.

privately held software company based in California

American software company

Coverity is a proprietary static code analysis tool from Black Duck, Inc. This product enables engineers and security teams to find and fix software defects.

US software company

software company

robotic process automation software

education question and answer platform

company based in San Jose, California

subsidiary of The Walt Disney Company

Cooliris, Inc. was a US corporation headquartered in San Francisco, California, that developed photo viewing products on mobile, web, and desktop platforms. It was a venture backed by Kleiner, Perkins, Caufield & Byers, T-Venture, DAG Ventures, The Westly Group and NTT DOCOMO.

creator and a developer of the Ripple payment protocol and exchange network.

privately held company

MontaVista Software is a company that develops embedded Linux system software, development tools, and related software. Its products are made for other corporations developing embedded systems such as automotive electronics, communications equipment, mobile phones, and other electronic devices and infrastructure.

Xinuos is an American software company that was created in 2011. It was first called UnXis until assuming its current name in 2013. (Both names are variations on the spelling of the Unix operating system.) Xinuos develops and markets the Unix-based OpenServer 6, OpenServer 5, and UnixWare 7 operating systems under a SCO branding indicative of prior product owners the Santa Cruz Operation and The SCO Group. Xinuos formerly sold the FreeBSD-based OpenServer 10 operating system.

American technology company

Alteryx, Inc. is an American computer software company founded in 1997 by Dean Stoecker. It is based in Irvine, California and develops products using data science and analytics. It was acquired by private equity companies in December 2023.

American technology company

SugarSync is a cloud service that enables active synchronization of files across computers and other devices for file backup, access, syncing, and sharing from a variety of operating systems, such as Android, iOS, Mac OS X, and Windows devices. For Linux, only a discontinued unofficial third-party client is available.

American technology company

company

software company

Clarizen, Inc. is a project management software and collaborative work management company.

embedded systems software