How do you find emails?

https://hunter.io/
https://leadzy.io/
https://apollo.io/
https://snov.io/
https://www.lusha.com/

You can use any of those tools + way more.

Finding someone’s email has never been easier, many tools have come up that help business in finding people’s email addresses for prospecting and lead generation. The most web-recommended tool that is also affordable for almost anyone for this is Aeroleads. It allows you to gain access to the contact information of anyone through LinkedIn and has a data verification system in place that makes sure that the contact information extracted is correct.

It will help you access the personal email, business email, and even phone numbers of your targets and will even build a list containing their contact information for you automatically. Of all the tools in the market, it is the only one that gives verified information at a more affordable price. They also give free credits to the new users to test out the product for themselves and see if it provides verified information or not. I’m linking it here so that you can check it out, it is NOT an affiliate link.
https://aeroleads.com/

I just released a chrome extension to do just that and as a fellow indie hacker, you will receive some 100 free credits: https://chrome.google.com/webstore/detail/leadix/lignoggmadijnbpnhcnogeibmplobcam

https://www.voilanorbert.com was highly recommended by ahrefs a while ago. Hunter.io is sketchy in Europe with dropcontact.io being much better.

https://icyleads.com - cheapest, unlimited basically
https://uplead.com - most accurate vs zoominfo (pricey)
https://hunter.io - for emails only

I’ve used Hunter.io to find emails. Can’t find them all, but I’m happy with the results.

Unless the person is an A-list influencer, you’ll be able to find a work (most cases) or personal (pretty rare) email address. You just have to dig a bit deeper.

It's definitely a challenge. I might create a collaborative page in the WBE Space so that members can share the emails that they have used and yield good results...

A bit of self promotion, depending on your target audience, you may find https://www.xemailextractor.com useful, it's a tool that will help you find targeted leads from Instagram, of course your audience must be on Instagram in the first place.