PostGrid Address Verification vs Stannp

PostGrid Address Verification checks, autocompletes, standardizes, and enriches addresses for delivery across the U.S., Canada, and 245+ countries and territories. It accepts structured fields, single-line freeform text, or incomplete entries and verifies against postal data in real time. Its international service supports CSV batches of up to one million addresses and can add geographic coordinates with rooftop-level accuracy. It supports non-Latin scripts including Chinese, Arabic, Japanese, and Korean, with conversion to standardized Roman scripts. Named integrations include Salesforce, Stripe, Dynamics 365, Shopify, and Zapier. Options include APIs and SDKs, a no-code dashboard, and self-hosting. Each verification, autocomplete, or standardization request counts as a lookup; monthly plans impose allowances and additional lookup charges beyond them. Standard Essential costs $18 a month billed yearly and includes 2,000 U.S. and Canada lookups monthly, with additional lookups at $0.02 each. Test API keys and 500 free lookup credits are available; a separate bulk verification service page describes 100 free lookups. The product page lists security and compliance provisions including HIPAA, PIPEDA, GDPR, SOC 2 Type 2, and PCI-DSS.

Stannp is a direct-mail platform for creating and managing campaigns of postcards, letters and self-mailers. Users upload data, add a design and schedule mail through the platform, which combines automation, personalization and real-time tracking. Customizable engagement reports and campaign insights help users follow activity. Stannp offers integrations with Zapier, REST API, Make.com, HubSpot and Klaviyo; its API can send mail programmatically from an app, website or CRM. The company says campaigns are printed and mailed the next business day. The free plan costs nothing and includes one user, one template, 50,000 contacts and 20 virtual printer items per month, with no minimum or maximum send volume. Starter costs $12 a month and includes one user, 10 templates, 50,000 contacts and 100 virtual printer items monthly. Stannp provides a knowledge base, 24/7 webchat, phone and email support, with account managers on eligible plans. It states that it follows UK GDPR, the Data Protection Act 2018 and ISO 27001 standards, and uses AES-256 encryption at rest and TLS 1.2/1.3 in transit. It is available through web and API access.