# Lesson 20: Web Calls, Chat Agents & SMS

**URL:** <https://community.retellai.com/t/lesson-20-web-calls-chat-agents-sms/2938>\
**Category:** Module 5: Deploy & Integrate\
**Created:** [May 31, 2026, 1:52am UTC](https://community.retellai.com/t/lesson-20-web-calls-chat-agents-sms/2938 "2026-05-31T01:52:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![system](https://canada1.discourse-cdn.com/flex008/uploads/retell1/original/2X/a/a06e2942efdc48016940732a05d1274957507ee3.png) [@system](https://community.retellai.com/u/system)\
**Post date:** [May 31, 2026, 1:52am UTC](https://community.retellai.com/t/lesson-20-web-calls-chat-agents-sms/2938/1 "2026-05-31T01:52:47Z")

</div>

## Web Calls, Chat Agents & SMS

### Web Calls

- Embed a Retell voice agent directly in your website
- No phone number needed — uses browser audio
- Great for: website support, demos, interactive product tours
- Embed via JavaScript SDK or iframe

### Chat Agents

- Text-based chat interface (not voice)
- Same agent logic, different interface
- Embed on websites, in apps, or use via API
- Good for: support chat, FAQ bots, text-based interactions

### SMS

- Send and receive SMS messages with AI agents
- Complementary to voice — follow up calls with text confirmations
- Send appointment reminders, confirmations, links

### When to Use Which

| Channel | Best For |
| --- | --- |
| Phone call | Complex conversations, older demographics, urgent matters |
| Web call | Website visitors, demos, no-phone-needed scenarios |
| Chat | Quick questions, async support, text-preferred users |
| SMS | Confirmations, reminders, short follow-ups |