What are some alternatives?
CloudFlare - CloudFlare can be used by anyone with a website and their own domain, regardless of your choice in platform
jsDelivr - A free, fast, and reliable Open Source CDN for npm and GitHub with the largest network and best performance from all OSS CDNs. Serving 20 billion requests per month.
Amazon CloudFront - Amazon CloudFront is a content delivery web service.
cdnjs - An open source community driven JS/CSS CDN.
MaxCDN - Make your websites and apps faster, purge and provision content instantly, and get CDN analytics in real time. Get a free test account today.
Statically - A free, fast, & modern CDN for open source projects, WordPress, images, and any static assets.