I'm interested in hearing recommendations for web app stacks for SaaS applications. I know this is broad -- here's my attempt at narrowing it down
* For a side project that I hope to grow to a business.
* Cheap for MVP / Customer Dev period
* Not gigantic scale: B2B app where 500 customers would be successful
* I'd like to host on something more like Heroku than Amazon (need ease of use over power)
* Probably will be in python / Django
* Would like very simple payments integration. Ideally, I don't need a merchant account to start
* Email processing (sending and receiving), but not high volume
Heroku looks good -- but, some of their add-ons look like they'd be ruby-only. Looks like you can start at $50/month (web dyno + prod DB) -- any other options?
For e-mail I recommend Sendgrid, you can get 200 e-mails a day free. Also easy to integrate in.
For payments I've used Braintree and I like it. I didn't set up the account but I was given a sandbox account to try it out and it should be possible to get one. Easy to use, especially if all you are doing are transactions (even though subscriptions aren't bad on Braintree either).