
RingLead
Clearbit
Lead411
LeadIQ
UpLead
D&B Hoovers
Lusha
DiscoverOrg
PostalDataPI
Smarty
Melissa Data Quality
PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate โ $0.000028 per query with no tiers or subscriptions.
What you get back: Up to 18 metadata fields per postal code โ city, state/region, coordinates, timezone, three levels of administrative hierarchy, elevation, and more. Sub-5ms cached responses.
Works everywhere: US ZIP codes, UK postcodes, German PLZ, Japanese postal codes, Canadian FSAs, and 230+ more. Format normalization handles case, spacing, and hyphen variations automatically.
Get started in 60 seconds: 1,000 free queries on signup, no credit card required. SDKs for Python and Node.js. MCP server for AI agents (Claude, Cursor, etc.).
Built for developers: REST API, consistent JSON responses across all countries, OpenAPI spec, llms.txt for AI agent discovery.
RingLead
PostalDataPIRingLead is recommended for medium to large enterprises that handle large volumes of customer data and are looking for efficient ways to manage data quality. It is particularly beneficial for organizations that use CRM systems extensively and require regular data cleansing, deduplication, and enrichment to maintain data accuracy and integrity.
Clearbit - Clearbit provides Business Intelligence APIs
Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
Lead411 - Lead411 is the Top B2B Marketing & Sales Intelligence data platform for prospecting, contact enrichment, Bombora intent and list building. Get Verified Emails, Direct Dials and Company Intel to improve your sales pipeline.
Melissa Data Quality - Melissa helps companies to harness Big Data, legacy data, and people data (names, addresses, phone numbers, and emails).
LeadIQ - VP of Sales. Every second in sales counts. You hired your sales team to sell, not do data entry. LeadIQ will pump up your sales team with accurate prospect data and a smooth workflow so you can fill up your pipeline faster.
UpLead - Access our accurate and real time verified B2B database to drive growth. With built-in email verification, UpLead is the leader in high quality business contact data. Start your free 7-day trial today!