Here's our stack:

Open Source

• Ruby on Rails
• Mostly VanillaJS with PreactJs for some components
• Postgres (hosted on Heroku)

Infra/Services

• Heroku
• Fastly
• Airbrake
• Skylight
• Sendgrid
• Amazon S3
• Google Analytics
• Stream
• Algolia
• Algorithmia
• Timber
• Codeship
• Codeclimate
• GitHub
• Pusher
• Twilio Video
• DaCast

Sometimes it's hard to say where to delineate the line of services that are part of the "stack" vs ones that are more just part of the business, but this is a list of tech we use that seems to fit the "stack" bill. I've also omitted a couple services that we have integrated but don't actively use at the moment. I've also omitted some stuff that seems to just be part of the Heroku default bundle. I also might have forgotten about something.

Anyway, feel free to ask us anything about what we use.