---
title: "Supported Features on Channels"
description: "Comprehensive reference for supported features, message types, and limitations across all Chatwoot channels"
---
## Supported message type
| Channel | Incoming/Outgoing message | Activity message |
| --------- | ------------------------- | ---------------- |
| Website | Yes | Yes |
| Facebook | Yes | Yes |
| Instagram | Yes | Yes |
| SMS | Yes | Yes |
| Whatsapp | Yes | Yes |
| Email | Yes | Yes |
| Telegram | Yes | Yes |
| Line | Yes | Yes |
| API | Yes | Yes |
## Maximum message size (number of characters)
| Channel | Maximum message size |
| ------------------ | -------------------- |
| Website | 10,000 |
| Facebook | 2000 |
| Instagram | 1000 |
| Twilio SMS | 320 |
| Twilio WhatsApp | 1600 |
| Whatsapp Cloud | 4096 |
| 360Dialog WhatsApp | 1600 |
| Bandwidth SMS | 160 |
| Email | 25,000 |
| Telegram | 4096 |
| Line | 2000 |
| API | 10,000 |
## Outbound conversation restriction
| Channel | Restriction |
| --------- | --------------------------------------------------------------------------------------------------------------- |
| Website | You can create outbound conversations to verified contacts |
| Facebook | Cannot create outbound conversations. First message should be from the contact |
| Instagram | Cannot create outbound conversations. First message should be from the contact |
| SMS | No restriction |
| Whatsapp | Cannot send any message other than Whatsapp approved template messages 24 hours after the last incoming message |
| Email | No restriction |
| Telegram | Cannot create outbound conversations. First message should be from the contact |
| Line | Cannot create outbound conversations. First message should be from the contact |
| API | No restriction |
## Outgoing message restriction
| Channel | Restriction |
| --------- | --------------------------------------------------------------------------------------------------------------- |
| Website | No restriction |
| Facebook | Cannot send promotional messages 24 hours after the last incoming message (7 days if Human agent enabled) |
| Instagram | Cannot send promotional messages 24 hours after the last incoming message (7 days if Human agent enabled) |
| Whatsapp | Cannot send any message other than Whatsapp approved template messages 24 hours after the last incoming message |
| SMS | No restriction |
| Email | No restriction |
| Telegram | No restriction |
| Line | No restriction |
| API | Custom time depends on Agent reply time window |
## Outgoing message delivery status
| Channel | Sent status | Read status | Delivered status | Failed status |
| ------------------ | ----------- | ------------- | ---------------- | ------------- |
| Website | Yes | Yes | Yes | Yes |
| API | Yes | Yes | Yes | Yes |
| Official WhatsApp | Yes | Yes | Yes | Yes |
| Twilio WhatsApp | Yes | Yes | Yes | Yes |
| 360Dialog WhatsApp | Yes | Yes | Yes | Yes |
| Twilio SMS | Yes | Yes | Not supported | Yes |
| Bandwidth SMS | Yes | Yes | Not supported | Yes |
| Facebook | Yes | Yes | Yes | Yes |
| Instagram | Yes | Not supported | Yes | Yes |
| Line | Yes | Not supported | Not supported | Yes |
| Telegram | Yes | Not supported | Not supported | Yes |
| Email | Yes | Not supported | Not supported | Not supported |
## Reply to message
| Channel | Reply to incoming message | Reply to outgoing message |
| --------------- | ------------------------- | ------------------------- |
| Website | Yes | Yes |
| Facebook | Yes | No |
| Instagram | Yes | No |
| SMS | No | No |
| Whatsapp Cloud | Yes | Yes |
| Twilio WhatsApp | No | No |
| Email | No | No |
| Telegram | Yes | Yes |
| Line | No | No |
| API | Yes | Yes |
## Outgoing attachments supported file types
The default maximum file size limit is 40MB.
| Channel | Audio | Image | Video | Document |
| --------------- | ------------------------- | -------------------- | ------------------------------ | ------------- |
| Website | All | All | All | All |
| Instagram | aac, m4a, wav, mp4 (25mb) | png, jpeg, gif (8mb) | mp4, ogg, avi, mov, web (25mb) | Not supported |
| Facebook | All | All | All | All |
| WhatsApp Cloud | All | All | All | All |
| WhatsApp Twilio | mpeg, opus, ogg, amr(5mb) | png, jpeg (5mb) | mp4 (5mb) | pdf (5mb) |
| Email | All | All | All | All |
| Telegram | All | All | All | All |
| Line | Not supported | png, jpeg | mp4 | Not supported |
| API | All | All | All | All |
"All" means the channel supports all standard file types listed below:
**Standard File Types**
- **Video:** `ogg`, `mp4`, `mov`, `webm`, `quicktime`, `avi`
- **Audio:** `mp3`, `mpeg`, `opus`, `ogg`, `amr`, `aac`, `m4a`, `wav`
- **Image:** `png`, `jpeg`, `gif`, `bmp`, `webp`
- **Document:** `pdf`, `doc`, `docx`, `xls`, `xlsx`, `ppt`, `pptx`, `zip`, `7z`, `rar`, `tar`, `xml`, `csv`, `json`, `rtf`, `txt`, `plain`, `.3gpp`, `x-7z-compressed`, `vnd.rar`, `x-tar`, `msword`
## Available features
| Channel | Channel greeting | Attachments | Agent Auto assignment | Slack |
| --------- | ---------------- | ----------- | --------------------- | ----- |
| Website | Yes | Yes | Yes | Yes |
| Facebook | Yes | Yes | Yes | Yes |
| Instagram | Yes | Yes | Yes | Yes |
| SMS | Yes | No | Yes | Yes |
| Whatsapp | Yes | Yes | Yes | Yes |
| Email | Yes | Yes | Yes | Yes |
| Telegram | Yes | Yes | Yes | Yes |
| Line | Yes | No | Yes | Yes |
| API | Yes | Yes | Yes | Yes |