iNaturalist
Technology, Information and InternetCalifornia, United States51-200 Employees
iNaturalist runs a free digital platform that lets people discover nature and contribute to science and conservation through a shared website and mobile apps. It is described as the world's largest community of naturalists, connecting a global base of nature enthusiasts who collaborate on citizen science and biodiversity observation. Headquartered in San Rafael, California, the organization operates with a small core team and a broad network of volunteers who affiliate with the project. The platform serves a wide audience, including casual nature observers, researchers, and conservation-minded participants, by enabling observation, discussion, and collaboration around biodiversity. In 2025, iNaturalist expanded collaborations with the National Park Foundation and the National Park Service to provide an app intended to enhance visitors' experiences while viewing wildlife. That year it also hosted its ninth City Nature Challenge, reflecting its role in organizing large-scale public engagement around nature observation.
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