Prospeo has the most up-to-date contact data I've found on the market right now. Emails and mobile numbers are accurate and fresh, so bounce rates stay low and outreach actually reaches the right people. The filters are also very easy to use: I can narrow prospects by job title, industry, company size and location in a few clicks and build a targeted list fast, without wasting time cleaning bad data. Review collected by and hosted on G2.com.
The only thing I don't like is that I can't reuse the same name when I update a saved filter. When I need to make a change, I have to save it under a new name, which clutters the saved filters list over time. Being able to edit and overwrite an existing filter would make managing searches much smoother. Review collected by and hosted on G2.com.