Double vs Hilbert

Double lets sales and marketing teams upload a prospect list and get GPT-powered web research on every account. You define custom qualification questions, and Double searches the internet to answer them instead of making reps manually Google each lead. It returns sourced answers you can review alongside LinkedIn profiles and verified emails in one table view.

Where most email finders stop at contact data, Double pairs verified emails with custom web research you define. You can ask whether a company is remote-first, SOC II compliant, B2B, building an API product, running a marketplace with payments, or shipping a mobile app as its core offer.

Double also finds verified work emails by aggregating more than ten private data sources. The site positions this coverage as broader than tools like Apollo and RocketReach. Teams at Amazon, Indeed, and Gartner are shown on the homepage, and the company is backed by Y Combinator.

Hilbert automates job interview stages so hiring teams can screen candidates without running every call live. You build custom interview flows that collect voice answers, multiple-choice tests, and live coding results, then review everything on candidate profiles with follow-up bookings attached.

Most ATS tools store applications; Hilbert runs the interview itself. That split matters when you want structured screening at scale but still need human judgment on who moves forward. Hilbert Match also sources and screens candidates with zero commission, booking Calendly interviews from pre-vetted talent.

Recruiters, agencies, and in-house hiring teams use Hilbert to cut hours per interview loop and reduce spend on external recruiters. Candidates join a community where one completed interview can feed multiple applications, and Hilbert offers a 7-day free trial to test the workflow.