Iterate

iteratehq.com

Iterate lets users get the feedback they need to build better products and make better decisions, whether they're running a small beta test or launching a feature to millions of users. Users can create and share surveys, or let Iterate email the surveys for them. Emails are uploaded from CSV, API, or integrate with Mixpanel to send automatically. As soon as feedback starts coming in, realtime notifications will be sent to users through Slack.