What are some alternatives?
When comparing USPS Informed Delivery and Jiffy, you can also consider the following products
Amazon Logistics - Create your own delivery business. Amazon's UPS competitor.
Arrive Package Tracker - The best way to track all of your online orders 📦
Amazon Same-Day Delivery - Free same-day delivery for Amazon Prime members
FLEXE Next Day Delivery - eCommerce fulfillment network for next-day ground delivery
Google Shopping - Find the best products, prices and places to buy
SendOvernightMail - The fastest way to send time sensitive documents via Fedex