I am looking for a combination of the features in Slack and Google Hangout:
In table form:
+------------------------------------------------+-------+-----------------+----+
| Feature | Slack | Google Hangouts | ?? |
+------------------------------------------------+-------+-----------------+----+
| Video calling | X | X | X |
| Screen sharing | X | X | X |
| Users can draw on top of shared screen | X | | X |
| Text chat | X | X | X |
| Video remains on for user presenting | | X | X |
| Available on Win/OSX (web is ok) | X | X | X |
| Price < 20$/mo per user | X | X | X |
+------------------------------------------------+-------+-----------------+----+
Which product fits in the last column by meeting all the requirements?