When comparing Buildbox vs ct.js, the Slant community recommends Buildbox for most people. In the question“What are the best 2D game engines?” Buildbox is ranked 58th while ct.js is ranked 72nd. The most important reason people chose Buildbox is:
Drag - and - drop editor without writing any line of code.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

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
Pro Beginner-friendly
ct.js is bundled with examples, docs, and easy to follow tutorials. Documentation and tutorials are available in a side panel on every screen.
Pro WebGL support
Starting with v1.0.0-next-1, you can now write WebGL games. WebGL support is based on Pixi.js.
Pro Tileset support
ct.js supports tiles in rooms, including collision checks and some extra editor tools, like bulk migration to a new tile layer or shifting by an exact value.
Pro Applicable to most genres
ct.js aims to be a general game engine and provides tools in making games of any genre.
Pro Good code editor
The built-in code editor comes with error checking, code completions, multiple cursors support, and other modern features.
Pro Modular approach
ct.js has a "Core" library that provides basic drawing functions, room and asset management, and mouse interactions. Any other functions are added to projects as "catmods", or simply modules. These modules can be enabled or disabled in one click, and can inject their code in different game loop stages, e.g. after drawing all the objects, leaving a room, or when a new object is created.
Cons
Con Incredibly Expensive
$99/mo for full functionality probably makes this the least accessible piece of game development software in regards to price, all with a very limiting feature set.
Con You are restricted by it's limitations
For example, you can only make certain kind of games.
Con Not very powerful
You will be limited to using templates to build games.
Con Subscription Model
The two more reasonable price points limit the functionality of a software already far less powerful than many more cost effective alternatives.

Con Very expensive
Buildbox has a 15-day trial version, after that a $2675 license to use it must be bought.
Con Stability Issues
The software has stability issues on Windows, with the preview window causing program crashes when simple functionality is added.
Con Young
This editor was not tested by time and doesn't have a huge community (by Oct 2018, and the first public release was on July 2018).
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