https://www.openshift.com/products/pricing/ 

특징

• 2GB RAM, 2GB Persistent storage 
• Unlimited network 
• 1 Project per account 
• Credit card — Not required 
• Support — Community 
• Considered secure

한계 

• No custom domain
• Resource hibernation — Your project resources sleep after 30 minutes of inactivity, and must sleep 18 hours in a 72 hour period
• xpiration — Your subscription automatically expires after 60 days; resubscribe as often as you like

https://www.openode.io/pricing 

특징

• 100mb RAM, 1GB Persistent storage
• Network: 10GB Bandwidth / Month
• 1 Project per account
• Credit card — Not required
• Support — Community (?)

한계

• No custom domain
• You must deploy at least once a week to keep an instance up. If it’s open source, your source code is publicly available on our Hub
• Your code will be open sourced unless you declare your project is educational (for students)

https://www.heroku.com/pricing 

특징

• 512mb RAM, No Persistent storage
• Unlimited network (?)
• Custom domain support
• Credit card — Not required but your instance will have 550 hours a month (this mean it must sleep ~25% of the time), a verified account will give you 1000 hours a month (they will not charge you)
• Support — Business hour support, 1+ day response times

한계

• Sleeps after 30 mins of inactivity, otherwise always on depending on your remaining monthly free dyno hours. **tip -> **you can use a free ping service who will keep your service — I’m using https://uptimerobot.com/

https://zeit.co/pricing 

특징

• Serverless hosting!
• No limit for RAM, 100gb Persistent storage
• Network — up to 100 GB / mo
• Custom domain support
• Credit card — Not required
• Support —Community/Twitter
• Serverless invocations — 1,000 / day
• Maximum Execution Time- 10 seconds

한계

Maximum File Size — 100mb

Had a personal experience of many service outages while hosting there

https://glitch.com/help/