1Lookup1Lookup is the world's most accurate data verification platform, helping small and medium businesses verify phone numbers, emails, and IP addresses with a 99.97% accuracy guarantee. Unlike competitors who use outdated data, we update our database daily from primary sources like FCC feeds and carrier APIs, making us 15% more accurate and helping catch 25% more invalid numbers. Our unified platform provides comprehensive validation services including intelligent fraud scoring, carrier detection, spam identification, and deliverability checks with sub-300ms response times worldwide. We serve thousands of businesses across financial services, e-commerce, healthcare, marketing, and real estate industries who trust us for transparent pricing with no hidden fees or contracts, instant setup in under 5 minutes, and real human support that understands small business needs. Whether you need to verify a single contact or process thousands of records, 1Lookup delivers the reliability and accuracy your business demands with customers typically seeing 85% reduction in fraud, 98%+ delivery rates, and significant improvements in data quality. Built specifically for SMBs who need professional-grade validation without enterprise complexity or costs, our developer-friendly API integrates seamlessly with your existing systems requiring no technical expertise while offering pay-as-you-use pricing with no minimums required. Experience the difference that fresh, accurate data makes for your business
1Lookup (1lookup.io) has 7 customer reviews on Five Star Index, with an average rating of 4.3 out of 5.
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Showing 1 review with 4 stars · Clear filters
Andres G.
I’m a backend dev running a small telemarketing SaaS. 1Lookup has been very reliable so far. Caught a lot of bad or inactive numbers before agents wasted calls. Would love to see more meta data returned (like carrier name or last active date), but overall, no complaints.