Judging from some of the replies below, it seems some answers propose more personalized/ less scalable solutions that work with platforms like LinkedIn (meaning... another chrome extension).
Now.
It's important I address a few issues with most of the lists/databases:
*They are overused.
*Lists are usually not tailored to your exact target audience
*They can be expensive.
Full disclosure: I set up Deal Champ to fix these issues and make it easy for the user to get a list of targeted leads.
After signing up for free, there are literally 3 steps you need to complete:
1.Choose any industry you want your leads to be from
2.Choose the location you want your leads to be from
3.Choose how many leads you want.
We've been using Deal Champ to generate lists of leads for our creative growth agencies and their clients. It worked great with MixMax.
Sending more personalized emails with data from SimilarWeb really helped show we understood our lead.
There are other places you can get B2B email lists, like Toofr, Growbots, or Growthlist. Although quality seemed to be good, price may be an issue for budding/bootstrapped entrepreneurs.
Just remember, please provide value when you cold email!
It's so important you show them why you're valuable to them before you even attempt to make a sale.