Palantir Technologies Inc. is an American publicly-traded company that specializes in software platforms for big data analytics. Headquartered in Denver, Colorado, it was founded by Peter Thiel, Stephen Cohen, Joe Lonsdale, and Alex Karp in 2003.

The company has four main projects: Palantir Gotham, Palantir Foundry, Palantir Apollo, and Palantir AIP. Palantir Gotham is an intelligence and defense tool used by militaries and counter-terrorism analysts. Its customers have included the United States Intelligence Community (USIC) and United States Department of Defense. Their software as a service (SaaS) is one of five offerings authorized for Mission Critical National Security Systems (IL5) by the U.S. Department of Defense. Palantir Foundry has been used for data integration and analysis by corporate clients such as Morgan Stanley, Merck KGaA, Airbus, Wejo, Lilium, PG&E and Fiat Chrysler Automobiles. Palantir Apollo is a platform to facilitate continuous integration/continuous delivery (CI/CD) across all environments.

Palantir's original clients were federal agencies of the USIC. It has since expanded its customer base to serve both international as well as state and local governments, and also to private companies.

In 2025, Palantir was reported to be working closely with US Immigration and Customs Enforcement to enable mass deportation in support of the Trump administration.