| Feature | Zulip | Slack | Discord | Piazza | Campus |
|---|---|---|---|---|---|
| Rich, modern chat | |||||
| Apps for every platform | |||||
| Self-hosting option for full control over data | |||||
| Dedicated account | |||||
| Topic-based threading | |||||
| Resolve topics/questions | |||||
| Move topics/questions | |||||
| Native LaTeX support | |||||
| Built-in spoilers | |||||
| Emoji reactions | |||||
| @-mention groups | |||||
| Scales to 10,000s of users | |||||
| # supported languages | 23 | 13 | 30 | 1 | 1 |