People Data Labs
Stands out: A free API sandbox, then self-serve Pro with contact data, premium fields and CSV enrichment on monthly or annual terms.
Watch out: Free hides email, phone and address. Annual saves 20% but is paid up front. Bulk data licenses are Enterprise and custom priced.
Not the right fit for
- Non-technical users who need a prospecting UI
- Buyers who need emails on the free plan
Predictrasearch
Stands out: A real free-forever plan plus a documented API, with HR listed as a use case beside fraud and journalism.
Watch out: Prices are in euros. This is an investigation tool, not a B2B email-and-phone prospecting database.
Not the right fit for
- SDR teams buying emails and mobiles for outreach
- Buyers who need a US-dollar rate card