What paid text-to-speech services are currently available?

Question

speech synthesis

I only know this one: upsaleslab.ru , are there any others?
I want to voice their parsed textual information containing text in two languages: Russian and English with auto-switching between these two languages, so that you don’t have to manually voice first English and then Russian text, but so that the software can do it automatically.
As well as text books, abstracts, text for youtube videos, etc. no limit on the number of characters.
An interesting software that has the quality of converting Russian and English text to speech is higher than that of IVONA and NUANCE.