Extremely good outbound: Triplechecker
Got a submission in our contact form from triplechecker. It listed two typos on our marketing site, and promised to show me 127 more if I signed up for their service (few bucks a month).
Our CEO regularly reads these contact form submissions, so sure enough 12 hours later we've signed up for the service. Thanks for the kind words. BTW, a member of your team did click to upgrade but didn't complete the sign up process :) Were you still interested in getting set up? Happy to help answer any questions (info@triplechecker.com) lol that was me, finally upgraded! love the service! Thanks so much!