If you need a search engine that finds contact information, including email and phone numbers, on the open web, Getlista could be a good fit. The service lets you search by keyword, boolean operators or natural language, and it can pull contact information like email and phone numbers from a prospect's presence on the web. It charges by the credit, with a 10-credit free trial, so it's good for everything from recruitment to sales.
If you're looking for a tool geared more toward website analysis, SonarList is a good option. It uses AI-powered technology to give you immediate access to useful information about target sites, including emails and LinkedIn profiles. It's got an email finder, LinkedIn profile retriever and email validator, and it's a good option for freelancers, small businesses and entrepreneurs who want to scale without paying a lot. SonarList offers free and paid options, so you can pick the plan that works best for you.