What are the pros and cons of DynamoDB with respect to other NoSQL databases?

Question

We use MongoDB database add-on on Heroku for our SaaS product. Now that Amazon launched DynamoDB, a cloud database service, I was wondering how that changes the NoSQL offerings

Answer 1

I think the key difference to consider is MongoDB is a software that you can install anywhere (including at AWS or at other cloud service or in-house) where as DynamoDB is a SaaS available exclusively as hosted service from Amazon (AWS). If you want to retain the option of hosting your application in-house, DynamoDB is not an option. If hosting outside of AWS is not a consideration, then, DynamoDB should be your default choice unless very specific features are of higher consideration.