RocketReach provides real-time verified data for 450 million professionals across 17 million companies, worldwide.
RocketReach is very user friendly, and generally their data is high quality. We like that it marks personal emails so you can assess whether it is appropriate to contact that person there.
Slintel specializes in leveraging technographic data to infer buying intent. It, helps uncover the few active buyers in their target market. Slintel evaluates a ton of data points and analyzes factors such as buyer journeys, technology adoption patterns, and other digital footprints to deliver market & sales intelligence.
From what we've heard, Slintel achieves a very high accuracy rate for direct phone numbers.