When comparing Phaser.io vs Buildbox, the Slant community recommends Phaser.io for most people. In the question“What are the best 2D game engines?” Phaser.io is ranked 13th while Buildbox is ranked 61st. The most important reason people chose Phaser.io is:
There are plenty of great learning resources available for Phaser.io.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Good tutorials, courses and books
There are plenty of great learning resources available for Phaser.io.
Pro Animating is easy


Pro Very fast to develop with
If you're browsing Slant, you probably already have a JavaScript enabled browser, which is most of what you need to get started learning JavaScript. The requirement to run a server locally on your computer while developing might make things a little more difficult
Pro Super-simple loading of assets
Pro Support for Arcade Physics, Ninja Physics and p2.js
Pro Great community resources
Pro Easy to learn
Pro Excellent tools for sprites
Pro Built-in Arcade Particle system
Pro No install required
All you need to do is attach Phaser script to a HTML page even without installing any extensions.
Pro Very active development
This is one of the most developed frameworks right now.
Pro WebGL and Canvas rendering modes
You can choose WebGL or classic HTML canvas element for game rendering.

Pro Drag - and - drop editor
Drag - and - drop editor without writing any line of code.
Pro Easy to learn
Buildbox is a drag and drop engine, making it easy for beginners to pick up. There are many tutorials available to help get you started.
Pro Has many game templates
Buildbox has 20+ different game templates including templates for platformers, racing games and Flappy Bird clones.
Pro Built-in support for ads
You can add banner and interstitial ads from multiple ad networks, including AdMob, RevMob, Facebook. They can work with Amazon's, Microsoft's, Google's and Apple's app stores.
Pro Develop once publish everywhere
Exporting iOS/Android/macOS/Windows/Steam/Amazon
Pro Cross-platform
Cons

Con Poor performance
As long as your map is not larger than 600*400px, everything is fine.
Con Incredibly Expensive
At $1000/yr, or $99/mo, it is probably the least accessible piece of game development software in regards to price.

Con Very expensive
Buildbox has a 15-day trial version, after that a $2675 license to use it must be bought.
Con Not very powerful
You will be limited to using templates to build games.
Con You are restricted by it's limitations
For example, you can only make certain kind of games.
Con Stability Issues
The software has stability issues on Windows, with the preview window causing program crashes when simple functionality is added.