Pro Has a free tier
Engine is free for projects under 200MB and with no more than 2 people on a team. The free tier has no engine restrictions.
Tools are totally free too. There are no special limiting features behind any paywalls, and free users have all the features as paid users.
There are no royalties associated with publishing your apps and games - you've made them, you own them.
It is free to publish to playcanvas.com as well, just by one click in Editor.
Pro Powerful assets pipeline
Assets and content delivery is very different on a web platform comparing to native. So PlayCanvas challenges best practices to allow developers decide how their content is delivered and in what form.
Async Assets download allows developers to load content as the app goes, instead of asking to download all assets in advance risking users to simply navigate away while staring at loading screens.
Formats for 3D models and textures support covers all the popular tools. And the workflow is as simple as dragging and dropping your files right into the Assets Panel. The cloud will do the rest of the hard work optimizing and converting your files into runtime-friendly and compressed data.
Pro Friendly and active community
PlayCanvas has Feed as homepage for registered users, listing Dev Logs of other developers. This allows to socialize with other developers like yourself in a twitter-like environment.
More to that, there is also an active forum, where developers help each other to solve their challenges.
Developers of PlayCanvas itself are always looking forward to chat and help the community with any problems that may arise.
Pro Avoids having to download lots of textures for lightmaps
Lightmaps are an efficient way to deliver lighting to your scenes for a long time. But they come with the cost of large textures. PlayCanvas offers a unique solution for a web platform, it renders lightmaps when an app is loading in runtime.
This is faster than downloading MBs of textures. And it's much more convenient: simply switch your light sources to bake, and static models to be lightmapped, and the engine will do the rest.