Lob Address Verification vs Stannp

Lob Address Verification checks address data to help determine whether addresses can be delivered. Its APIs validate one address or a batch, and Lob says it can also check and standardize addresses while customers enter them on a website. Results can add delivery and geographic details, including ZIP+4, carrier route, address type, latitude and longitude, plus a confidence score based on its mail delivery data. The product page lists delivery data for more than 240 global territories and USPS CASS certification. Integrations include AV Elements, Shopify Address Cleanser, Airtable Address Cleanser and Zapier; the interactive demo provides examples in cURL, TypeScript, Node, Ruby, Python, PHP, Java, Elixir and C#. Lob says it encrypts data in transit with TLS 1.2+ and at rest with AES-256, and provides automatic redaction and data retention policies. Developer has no subscription fee; listed paid pricing starts at $20/mo (annual). A 30-day Enterprise trial is available for high-volume senders; print and postage are billed separately at discounted Enterprise rates.

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.