Adapt is a B2B contact and company database provider across multiple industries. Adapt has 100 million business contacts, including industry-specific company database and contact information such as job title, direct dial, and email addresses.
It's affordable and they seem to be able to find a wide range of contact details. They have a nice Chrome extension which works well.
SalesIntel is a full-funnel SaaS solution that helps sales and marketing teams easily identify high intent accounts and find contact information for key decision-makers.
We like how when there is no information about a company, you can request it and SalesIntel will get it back to you pretty quickly with the missing data!