Norbert is an intelligent lead generation tool that can find anyone's corporate email address and enrich it with data that drives conversion.
It won't blow you away but the accuracy is pretty good, and it has a clean user interface. It's one of the few platforms that doesn't require a subscription - you just pay for however many emails it finds.
Clearbit is the marketing data engine for all of your customer interactions. Deeply understand your customers, identify future prospects, and personalize every single marketing and sales interaction.
Clearbit is a pretty big platform with a sizeable suite of prospecting tools. The Salesforce integration is seamless and makes the process of finding, capturing, and converting leads east and effective.