PaaS: Google AppEngine v.s. Heroku

Reference

• http://www.scriptrock.com/articles/heroku-appengine
• https://news.ycombinator.com/item?id=4573685
• http://kmilo0.blogspot.tw/2013/02/gae-vs-heroku.html

Intro

I am putting "Reference" section as the first section in this post because that I am writing this post totally based on the refereces.

Comparison

Language Support

Google AppEngine: Python, Java, PHP, Go / Cloud SQL(MySQL compatible)
Heroku: Ruby, Java, Node.js, Python, PHP, Clojure, Scala / PostgreSQL, MongoDB, Cloudant, Redis

Comments for Google AppEngine

AppEngine’s proprietary, read-only nature results in tedious and unnecessary code refactoring; apps have to be written specifically with AppEngine in mind, API’s have to be written specifically for AppEngine, even standard Java code has to be extensively altered to fit into the AppEngine environment.

Google insists on AppEngine customers only using its BigTable non-relational database, although they have also recently added some support for CloudSQL.

Comments for Heroku

Heroku’s database-platform choices reflect a collection that is in widespread use already in the wider world.

Comments on Both

Heroku’s database-platform choices reflect a collection that is in widespread use already in the wider world.

My Summary

I only have a little developing experience on both PaaS platforms. However, from the referece I found, more people suggest Heroku than Google AppEngine. It's because that Google AppEngine is tie-in, lack of flexibility, and hard to move to regular VPS if needed.