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PostalUp review

Freemium#18 of 30 in Address Verification Software

A practical US-focused API for validation, batch processing, and postal metadata.

7.7/10Editor score
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

PostalUp is a US-focused address standardization and validation service for developers building forms, checkout flows, CRM workflows, logistics tools, and other applications that need programmatic address processing. Its REST API uses USPS Publication 28-oriented formatting and returns normalized address components, ZIP+4 details, delivery-point information, coordinates, time zone, and other metadata. Address processing is available through single-address requests, batch validation, CSV uploads, and an interactive online validation tool.

The published plans provide a clear progression from evaluation to higher-volume processing. Free to Try includes address standardization, basic validation, email support, 1,000 one-time free requests, and 10 requests per minute. Starter costs $29 per month and adds ZIP+4 validation, batch processing, 10,000 requests per month, and 50 requests per minute. Professional costs $99 per month with batch and real-time processing, priority support, 100,000 requests per month, and 200 requests per minute. Scale costs $299 per month for 500,000 requests per month, 500 requests per minute, and larger batches. Enterprise includes dedicated support, a custom SLA, unlimited requests, no rate limits, and volume discounts.

PostalUp fits teams that need US address formatting, validation, and metadata through an API or web workflow, particularly when bulk processing matters. API-key authentication, rate limiting, and usage tracking provide operational controls for programmatic use. The product remains narrowly focused: current coverage is US-only, while Canada and global validation are roadmap items. It does not provide autocomplete, verified correction, or listed third-party integrations. Choose PostalUp for US batch validation and structured postal data; consider an alternative when international coverage, autocomplete, verified correction, or broader integration support is central to the workflow.

PostalUp pros and cons

  • Where it wins
    • Batch validation supports up to 10,000 addresses
    • Returns ZIP+4, delivery-point data, coordinates, and time zone
    • REST API, CSV uploads, and a free tier support evaluation
  • Where it doesn't
    • Coverage is limited to US addresses
    • No autocomplete or verified correction features
    • No listed integrations beyond web and API access

PostalUp fact sheet, pricing and score →

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