Cognism is a big player in B2B sales intelligence, particularly known for phone number data, so if you've had unexpected cold calls as well as emails, this is worth doing.
Use their dedicated data opt-out form. Fill in your name, work email, company, and country, then submit. They aim to action requests "in the shortest time possible," within GDPR timeframes (so allow up to 30 days, though it's usually quicker). If you're in the US, you can also opt out by phone.
Frequently asked questions
Will my data come back?
Possibly. Data brokers re-scrape public sources periodically, so your details may reappear after some time. It is worth checking back every few months and resubmitting a removal request if needed.
How long does this take to process?
Cognism commits to acting within GDPR timeframes, so allow up to 30 days. In practice it is usually processed sooner.