Tesoro was a manufacturer of Metalldetektoren from the USA, known for its high quality and durability. The company had offered a wide range of products for amateur and professional treasure hunters, including detectors for coins, jewellery and relics. Tesoro was based in California and had been in business since the 1980s. Their products are popular with metal detector enthusiasts and are known for their reliable performance and user-friendly design. Tesoro ceased business operations in 2020. Their devices are now only available on the Metalldetektoren second-hand market