ApproveAPI vs ShadowBid

A simple API to request a user's real-time approval on anything via email, sms + mobile push.

ApproveAPI​ is a developer API for requesting a user's real-time approval on anything via Email, SMS, and in-app Mobile Push notifications with a consistent tap-to-approve user experience.

Use ApproveAPI to verify financial transactions in real-time, send magic sign-in links, authorize new device sign-ins, confirm identity for lost accounts or customer support, and setup multi-person approvals all in one simple API that works uniformly across Email, SMS, and iOS/Android Push notifications (via our Push SDK).

Location: Boston, United States

Automated purchasing when the price drops!

ShadowBid gives shoppers the ability to choose their price for any item on Amazon. We track the price, and when it drops, the purchase happens automatically.