Lob Address Verification vs Postable

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.

Postable is a web service that prints, addresses, stamps, and mails physical greeting cards. Customers can choose a design, customize photos, messages, and fonts, or upload an image. Contacts can submit their details through a personal link, or users can import CSV and Excel files or enter addresses manually. The online address book is free even without card purchases. Carbon Copy sends one message to multiple contacts and personalizes each card with the recipient's name. Users can schedule birthday cards for the year in advance and anniversary cards for a chosen date. Business features include contact imports, logo-branded cards, volume discounts, and a dedicated account representative. Postable says its cards are printed on 100% post-consumer recycled paper. Cards usually arrive in about a week, but delivery is not guaranteed; tracking shows locations and estimated dates, while USPS does not scan final delivery. Listed card rates are $5.99 plus stamp for one card, $5.29 each plus stamp for 2–19 cards, and $4.59 each plus stamp for 20 or more. The site also lists the paid service from $2.24.