What are some alternatives?
When comparing LinkedBooster.app and ProspectIn, you can also consider the following products
Dux Soup - Dux-Soup is a lead generation tool for LinkedIn.
Linked Helper - Linked Helper is a workflow automation tool for LinkedIn Sales Navigator and LinkedIn Recruiter.
Phantombuster - A marketplace of simple to use no-code APIs
ColdInbox - Quickly Send Automated LinkedIn Messages That Convert Your High Value-Prospects Into Leads And Then Customers Without Having to Spend $$$ in Advertising!
One2Lead - LinkedIn automation tool. The easiest way to generate new business opportunities using LinkedIn