Growmail vs Lob Address Verification

Growmail provides print and direct-mail services for businesses sending postcards, brochures, flyers, and letter mailers to selected audiences. Targeting can use neighborhood, ZIP code, route, demographics, income, or interests. Products include Every Door Direct Mail, targeted direct mail, and Discount Zone mailers, with QR-code and call-tracking add-ons for campaign measurement. The Direct Mail Manager API syncs customer data, personalizes postcards, and triggers sends from customer actions. Listed connections include Salesforce, Shopify, Intuit, Capsule, Planning Center, and Zapier; other CRMs can connect through webhooks or API calls. Direct Mail Manager states that it has no batching or minimums and guarantees mailing within 48 hours. Most campaigns are produced and mailed within 5–7 business days after proof approval, and every order includes a digital proof requiring approval. Growmail mails across the continental United States, Hawaii, Alaska, Puerto Rico, and the U.S. Virgin Islands. Pricing is on request, with a New Mover Direct Mail option at $69.95, paid once for a minimum of 100 mailers.

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.