Help center
Lettr documentation
Everything you need to install the widget, get your team running, and answer your first customer message. Most articles take less than five minutes.
Getting started
Quickstart: get Lettr running in 10 minutes
Sign up, drop the chat widget on your site, invite a teammate, and answer your first customer message — end to end in about ten minutes.
4 min read
Installing the chat widget on your website
How to drop the Lettr chat-widget script tag onto Shopify, WordPress, Webflow, and custom HTML sites — including testing on staging first.
5 min read
Inviting your team
Add agents, admins, and owners to your Lettr workspace. Choose roles, send invites, and manage seats.
3 min read
Using Lettr
How AI-drafted replies work
Lettr drafts replies for your most common customer questions. How drafts are generated, when to trust them, and how to improve them.
3 min read
Escalation groups: when a ticket needs a second pair of eyes
Set up escalation paths so hard tickets reach the right specialist on your team without the customer noticing the hand-off.
3 min read
Publishing a help center for your customers
Publish help articles to your end users at lettr.4os.ai/help/your-slug — pick a public slug, write articles in Markdown, and link from your support replies.
4 min read
Troubleshooting
Can't find what you need?
Email hello@4os.ai — we read every message and reply within one business day.