Dynadot is an ICANN-accredited domain registrar and web host headquartered in San Mateo, California. The company was founded in 2002 by Todd Han and is privately held. Through the service you register and transfer domain names, enable domain privacy, and manage DNS, forwarding and your domains via a control panel or a full API. Dynadot also runs an aftermarket with auctions of expired domains, backorders and listings from users, as well as a website builder, professional email and a logo builder. The services are delivered online; the software is not open source.
Because Dynadot is a US company, it falls under US legislation, including the CLOUD Act. Besides the California office, the company has offices in China and in Toronto, Canada. The sources consulted do not state where your data is stored. For a European organisation this is a non-European provider, which is relevant for domains with sensitive or business-critical functions.