ApproveAPI vs Flamingo

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

Flamingo is a leave management app for Slack teams, making the leave request and approval process as simple as can be.

Flamingo makes it easy to request and manage your team's time off, allowing you to get to work on tasks that actually move the needle. With Flamingo, your team members can request leave directly in Slack, and managers can do the same when reviewing leave requests. You're guaranteed to save at least 90% of the time you spend managing your team's leave calendar, compared to inefficient methods like spreadsheets and email threads.

Location: Delaware, United States