Companies competing in Notifications infrastructure
| company | description | stage |
|---|---|---|
| Bird | Communications APIs. | private (series C) |
| Courier | Developer infrastructure for product notifications. | private (series B) |
| Knock | Notifications infrastructure. | private (series A) |
| Raven | Transactional message coordination. | private (seed) |
| Twilio | APIs for communications. | public (NYSE: TWLO) |