mailboxlayer API vs MockRabbit

Free & Simple Email Verification JSON API

Mailboxlayer is a free, simple and powerful JSON API offering instant email address validation & verification via syntax checks, typo and spelling checks, SMTP checks, free and disposable provider filtering, and much more. Its system is REST-based, secured by 256-bit HTTPS encryption, and pursuing the goal of assisting developers and businesses in fighting fraudulent users and increasing success rates of email campaigns.

MockRabbit - Mock Interview Practice Anytime Anywhere

MockRabbit app helps to perfect your software developer job interview while practicing the mock interview in front of your mobile and getting instant feedback from our Artificial Intelligence engine at an instant.
We built the app to deliver the following benefits

Become a complete software developer who writes meaningful, easy, optimized and maintainable code.
Ace the coding interview giving answers to the questions using our unique S.A.R. (Situation, Answer, Result) structure. You are assured of being a most impressive guy in front of a recruiter.
Understands and answers real-life problems in a way that creates a profound impact with their solution.
Earns the reputation in the market as a complete software developer.