GT4T now resells DeepL Pro data but most users will actually save money by using DeepL Pro through GT4T.
DeepL Pro subscription requires a minimum monthly fee of 20 Euros but GT4T is purely character-based. You only pay for the amount you use.
If you are concerned with data security and translate less than 1M characters a month, GT4T is probably a better choice.
For details of DeepL Pro, check out this link: