Google Assistant vs Google Now

Google Assistant
Virtual assistant integrated in conversational user interface products: Google Allo and Google Home. You can ask a question for an answer, and follow up with multiple questions, with Google picking the conversation out and returning the right answer.
Google Now
From knowing the weather before you start your day, to planning the best route to avoid traffic, or even checking your favorite team’s score while they’re playing, get the information you want, when you need it.

2016 - Google opens Assistant to third-party developers to retire Google Now

Google Assistant, the Alexa/Siri-like AI offering is the heart of Google's new phone Pixel, announced today.  And much like Alexa, the company is set to open its smart helper to third-parties. The company’s answer to Amazon’s Skills is the ironically passively named Actions on Google. The program will open Assistant’s SDK to developers starting this December. With it, devs will be able to create two kinds of actions – Direct and Conversation. The former entails simple requests like home automation, while the latter is more of a back and forth interaction utilizing