Is it legal to parse Telegram, VKontakte and company data?
Short answer: collecting public data isn't prohibited in itself, but there are limits — personal-data law and platform rules. Below is how it works and how to use the export responsibly. This is an explanation of the general position, not legal advice.
What public data is
We collect only what a person or company published openly: @username, public profile fields, open messages, organization cards. We don't bypass anti-bot protection, don't break into private data, and don't collect what the platform hides (for example, another member's phone in Telegram — the API doesn't expose it).
Parsing and personal-data law
Personal-data law governs the processing of personal data. If the export contains data that can identify a person, responsibility for further processing (storage, mailings) lies with whoever uses it. Practical rule: use bases for analysis and targeting via ad platforms, not for unsolicited mailings and spam.
How to use the export responsibly
Don't send unsolicited messages, don't impersonate a platform, follow ad-system rules. The data you export stays yours — the service is only a tool for collecting public information.