The verdict
For most lean B2B founders, especially anyone selling into Europe, Dealfront is the right starting point. It is GDPR-compliant and EU-hosted, its data is densest exactly where you are selling, and you can begin on a free tier or a single 99 EUR/mo module instead of signing a five-figure annual contract. It deliberately stops at identify-and-enrich, so you bring your own outreach, but for a founder that is usually fine.
ZoomInfo earns its reputation on raw scale: the largest global contact database here, deep CRM enrichment, and sequences plus a dialer built in so prospecting and outreach live in one tool. That power comes at a price that only makes sense once you have repeatable revenue and a team to feed it. Below that point, you are paying enterprise rates for capacity you cannot yet use.
The honest call: pick Dealfront to start lean and stay GDPR-safe in Europe; graduate to ZoomInfo when global data depth and an all-in-one outreach platform are worth 15,000 USD a year and up.