1.Twilio
Twilio powers the future of business communications, enabling phones, VoIP, and messaging to be embedded into web, desktop, and mobile software.
2.Factual
Factual’s location platform enriches mobile location signals with definitive global data, enabling personalised and contextually relevant mobile experiences. Built from billions of inputs, the data is constantly updated by Factual’s real-time data stack.
3.Filepicker.io Connect your app to everything from Dropbox to Gmail in just 2 lines of code and let the Filepicker.io handle the mess of uploading files - it gives you a clean, short URL that is easy to store and read from.
4.Context.IO
Context.IO is a REST email API that makes it easy and fast to integrate your users' email data in your application.
5.Embedly
With the Embedly API you can get great content, make it beautiful, and understand how people use it.
6.PubNub
The PubNub Realtime Network powers thousands of apps, streaming more than 3 million messages a second to over 200 million devices a month.
7.Mailgun
Powerful APIs that allow you to send, receive and track email effortlessly.
8.Stripe
A beautiful, optimised, cross-device payment form with support for single click payments.