When comparing dotCloud vs PythonAnywhere, the Slant community recommends PythonAnywhere for most people. In the question“What are the best Platform-as-a-Services (PaaS) to deploy a Python web application?” PythonAnywhere is ranked 2nd while dotCloud is ranked 4th. The most important reason people chose PythonAnywhere is:
It's literally a matter of minutes to get a Python-backed website up and running.
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Pros
Pro Adjust per-instance memory
Most other PaaS providers only allow for multiple, low-memory instances for horizontal scaling, but dotCloud also allows for vertical scaling and resource-heavy applications by adjusting per-instance memory availability.
Pro Quick deployment
dotCloud is usually very fast when it comes to deploying your project. The CLI tool is very good at that and deploys your build almost as soon as you push it.
Pro Thorough Documentation
The documentation is very good an explains everything in-depth.
Pro Support for various types of databases
Supports Postgres, MongoDB, RabbitMQ, Redis, and MySQL. All of these can be used without any additional pricing, no need to pay for expensive addons.
Pro Easy setup
It's literally a matter of minutes to get a Python-backed website up and running.
Pro Easy scaling
You pay for a number of "Workers" for your web app (to handle requests), or CPU seconds for code that you run outside a web app, and you can get more workers or CPU seconds by upgrading your plan any time.
Pro Excellent customer service
Really fast turnaround, friendly.
Pro Free option
You can run a website at USERNAME.pythonanywhere.com for free, and it's good enough for a light-traffic website -- it runs 24/7. You get a free MySQL or SQLite database too.
Pro Flexible payments
You can pay monthly and cancel any time, or pay for a year up front to get a discount.
Pro Not too expensive
A basic site with no custom domain is free. $5 a month will afford the user enough power for a typical 100,000 hit a day website.
Cons
Con Poor database performance
When your databases have a very high write volume dotCloud starts having some serious problems keeping up with it. Performance drops completely and in the worst case scenario the database crashes and starts going down daily.
Con Python-only on the server side
Obviously you can put JavaScript in your web pages and so on, but you can't use Rails or Node.