Are there spell checkers?

Question

Spellchecking

Good afternoon.
Are there services in Russia where you can post your articles and other text materials, and a real person will check them for you? And it is desirable that these materials then do not "leave" anywhere?
Preferably your personal experience.
You really need a freelance editor here. I'm just asking about the convenience of using a service, rather than hiring a person directly.