Hi ,
I have more than 3 years of experience on lead generation and email campaigns. Just need to know your requirements for example Industry , company size, Number of leads, Number of days to deliver etc.
Usually I can find these informations as your targeted leads : Company Name, Company URL, First Name, Last Name, Full Name, Title, Email, LinkedIn and Industry. 98% of the leads will be valid. (2% might bounce back) and I use a strong lead validation process.
Hope I can help you with my experience.
Best wishes to you. and stay safe.