When comparing Kuzzle vs Google Firebase, the Slant community recommends Google Firebase for most people. In the question“What are the best Backend as a Service providers for webapps?” Google Firebase is ranked 1st while Kuzzle is ranked 2nd. The most important reason people chose Google Firebase is:
The Blaze Plan is a pay-as-you-go plan, which is, you pay for what you use, without overhead or upfront costs.
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Pros
Pro Multiprotocol
Supports REST, WebSockets and MQ protocols.
Pro Realtime through filters
You do not connect to classic rooms but to search filters and can be warned of changes on permanent storage or volatile one.
Pro Open Source
Kuzzle is open source and it's released under the Apache 2 License.
Pro Javascript SDK
A fully documented javascript SDK exists.
Pro Flexible Pricing
The Blaze Plan is a pay-as-you-go plan, which is, you pay for what you use, without overhead or upfront costs.
Pro Straightforward hosting
Powered by Google's Cloud Platform, Firebase allows you to deploy static web pages or web applications with a nifty Node.js-based CLI Tool.
Pro Super fast CDN
All static website content is hosted on the Fastly CDN making your website really fast.
Pro More than just hosting web applications
In the core of Firebase allows you to do testing for Android apps, Analytics, Real-time Database, and many more. It's centered mostly for progressive web applications and mobile applications with real-time connectivity to your service.
Pro Almost free if you add Cloudflare in front (no bandwidth costs) and cache effectively
The built-in CDN is great too, but if you're concerned about bandwidth costs, using it with Cloudflare is an excellent option option.
Cons
Con May have issues since it's stil la relatively young project
Kuzzle is (as of February 2nd, 2015) in alpha version and approaching beta.
Con Google blocks Access
Some Google services, software and cloud systems, are not available to certain countries. blocked access by google following USA Policies.
Con Linked to Google Cloud Platform
If you don't have a Google Account, you won't be able to access Google cloud services, including this one.