Best lookup and data vendors

The lists

• Best email verification tools, scored

  Services that test whether an email address will accept mail, one at a time or as a list. 12 ranked vendors.

• Best reverse phone lookup services, scored

  Services that start from a phone number and return who or what is behind it. 6 ranked vendors.

• Best phone validation and HLR APIs, scored

  APIs that validate a phone number against its numbering plan and name the carrier or number type. 8 ranked vendors.

• Best HLR lookup services, scored

  Services whose own records mention carrier, line type, line status or HLR lookups. 7 ranked vendors.

• Best IP geolocation APIs, scored

  APIs that return location, network and risk data for an IP address. 8 ranked vendors.

• Best skip tracing services, scored

  Services that find the owner and contact details behind a property or a name. 7 ranked vendors.

• Best DNC scrubbing services, scored

  Services that check phone lists against do-not-call data. 5 ranked vendors.

• Best contact enrichment APIs, scored

  APIs and platforms that add work emails, phone numbers and company data to a lead. 7 ranked vendors.

How every list is scored

• Published terms (30): Share of the 7 comparison terms (free option, free trial, credit expiry, contract minimum, API access, rate limits, support) that the vendor's own page states, times 30.
• Lowest price per 1,000 (30): The lowest per-1,000 figure in US dollars in the vendor's price rows: printed on the page, or our arithmetic from a price per request. The cheapest on the list scores 30, the dearest scores 0, and the rest fall between them on a log scale. A vendor with no dollar per-1,000 figure, including one that prints its prices in another currency, scores 0 on this criterion.
• Plans or packs priced (20): Price rows printed on the vendor's pages: three or more score 20, fewer score a proportional share.
• Billing without a monthly minimum (20): Prepaid credits or per-request billing score 20, a mix of packs and subscriptions scores 10, and subscription, per-seat or quote-only billing scores 0.

Each list page shows its own table. Ranked email verification tools: 12 scored from vendor pages read 2026-10-18, with the criteria and weights shown.