Extract emails from a list of LinkedIn profile URLs

Hello

I have a large list of LinkedIn profile URLs, and I want to extract emails for all of them. So far, I have tried the following tools:

• SalesQL
• ContactOut
• RocketReach
• Snov.io
• GetProspect
• Skrapp
• Aeroleads

So far, I've had best results with SalesQL, ContactOut and RocketReach. I am trying to avoid SalesQL since it uses scrapping instead of using its own database to lookup. Both ContactOut and RocketReach are too expensive for me.

This is my first time doing something like this and would like to get advice.

Update: I ended up trying Apollo.io as well, and so far it looks good. Any reviews?