StormGain (www.stormgain.com) is an unregulated crypto trading platform operated by the offshore entity Stormgain LLC in St. Vincent and the Grenadines. Currently, StormGain does not hold a license in any regulatory regime as a broker, investment firm, or financial services provider. Like Kraken, BitStamp, or other crypto brokers, StormGain lets you trade a range of crypto pairs. Partners of StormGain include Israel's Bits of Gold, Koinal, or Simplex. In December 2019, the Spanish regulator CNMV issued a warning against StormGain.
The website of the high-risk payment processor Paythrone looks acceptable. Not exactly majestic as the name might suggest, but nice. Other than that, you won't find much on the website. Neither is it stated (or we didn't find it) which legal entities and persons operate the payment facilitator or under which jurisdiction it operates. We have found the payment processor focused on "complex merchants" most recently in the two broker scams Spintop Capital and Optimus Markets. However, we would love to learn more about the mysterious provider.