Palantir Technologies Inc. is an American publicly traded company specializing in software platforms. 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, state, and local governments, and also private companies.

The company has been criticized for its role in expanding government surveillance using artificial intelligence and facial recognition software. Former employees and critics say the company's contracts under the second Trump Administration, which enabled the aggregation of sensitive data on Americans across administrative agencies, are particularly problematic.