Marvel Embeds - Embed interactive prototypes on any site (including Medium!)
Salesforce Data.com - Data.com provides company profiles and contact information across millions of businesses worldwide.
Upscribe - Embeddable lead generation forms for Medium
HookFeed - Customer Analytics in One Click.
PingPoint - Never miss a Mark Zuckerberg signup to your app ever again
LeadGibbon - Access millions of business contacts, with verified email addresses and phone numbers