Sigma Chat
"Sigma Chat" is the shorthand for Sigma Browser's built-in AI assistant — writing, web search, page chat, and image generation in one panel. This guide shows you how to open it, what to watch out for, and how Tabbit takes browser chat further.
How to Access Sigma Chat
There is no single "sigma chat" app store listing. Users reach Sigma Chat through one of three paths:
Inside Sigma Browser
Download Sigma Browser for Windows or Mac, open the AI Chat panel from the sidebar or toolbar, sign in, and start prompting.
Online at app.sigmabrowser.com/chat
Open the web chat at app.sigmabrowser.com/chat in any browser. Requires sign-in. Chat runs in a separate tab — no page context from your browsing session.
WebCatalog Desktop Wrapper
WebCatalog packages Sigma Chat as a standalone desktop window. Useful for distraction-free chat, but still the same web app under the hood.
Sigma Chat vs Similar Names
Searching "sigma chat" returns several unrelated products. Here is how to tell them apart:
Sigma Chat (Sigma Browser)
AI chat built into Sigma Browser — writing, search, page chat, image gen.
✓ This is what you wantChatSigma (chatsigma.com)
WhatsApp Business API automation platform for lead management and sales bots.
✗ Different product entirelySigma Computing AI
Enterprise data analytics with "Ask Sigma" — natural language queries on business data.
✗ B2B analytics, not a browser chatSigma Chat Workflows
Once you open Sigma Chat, these are the most common conversation patterns users run:
"Summarize this article in 5 bullet points"
Page-aware summary when Chat With Page mode is active on an open tab.
"Rewrite this email to sound more professional"
Text Writer mode drafts and polishes content from your prompt.
"What are the latest updates on [topic]?"
Web Search mode queries live results and returns a synthesized answer.
"Generate an illustration of a workspace"
Image Generation creates visuals from text inside the chat panel.
Sigma Chat Pricing Snapshot
- Basic AI chat with daily limits
- Web search and text writing
- Chat With Page on open tabs
- Image generation (limited)
- Higher message and generation limits
- Premium model access
- Priority response speed
- Extended image generation quota
Tabbit Chat: Beyond Sigma Chat
If Sigma Chat feels like a side panel bolted onto a browser, Tabbit was built with conversation at the center of every browsing session.
Omnibox AI — chat from the address bar
Type a question directly in the URL bar. No separate panel, no sign-in wall — conversation starts where navigation begins.
@ Tab references — multi-page context
Mention open tabs with @ in your prompt. Tabbit pulls context from multiple pages simultaneously — deeper than single-page chat.
Agent Mode — chat that acts
Go beyond Q&A. Tabbit agents fill forms, compare prices, book meetings, and execute multi-step web tasks from a single conversation.
Free download, multi-model choice
Access Claude, GPT, Kimi, and more inside one browser. No Plus paywall for basic chat — download free on Windows and Mac.
Sigma Chat vs Tabbit Chat
Sigma Chat — Frequently Asked Questions
What is Sigma Chat?
Sigma Chat is the built-in AI assistant inside Sigma Browser. Users often shorten "Sigma AI Chat" to "sigma chat" when searching. It handles writing, web search, page-aware Q&A, and image generation.
Is Sigma Chat free?
Yes — Sigma Chat has a free tier with daily limits on messages and generations. A paid "Plus" subscription unlocks higher limits and premium models. Tabbit also offers free built-in AI chat with no Plus paywall for basic use.
How do I use Sigma Chat online?
Visit app.sigmabrowser.com/chat, sign in, and start chatting. Alternatively, download Sigma Browser and open the chat panel from the sidebar. Both require a Sigma account.
Is Sigma Chat the same as ChatSigma?
No. ChatSigma (chatsigma.com) is a WhatsApp Business API automation tool. Sigma Chat is the AI assistant inside Sigma Browser. They share a similar name but are completely different products.
Can Sigma Chat read the webpage I am viewing?
Yes — Sigma's "Chat With Page" mode lets you ask questions about the currently open tab. Tabbit extends this with @ tab references across multiple open pages in one conversation.
What is the best Sigma Chat alternative?
For browser-native AI conversation with agent execution, Tabbit is a strong alternative. It offers Omnibox chat, multi-tab @ references, and Agent Mode that performs actions — not just answers — on the web.
Does Sigma Chat work on Mac and Windows?
Yes. Sigma Browser (with built-in chat) is available on Windows and macOS. The web chat at app.sigmabrowser.com/chat works in any modern browser. Tabbit supports both platforms as well.
Is Sigma a legit company?
Sigma Browser is a legitimate AI browser product from Sigmabrowser.com. Do not confuse it with Sigma Computing (enterprise analytics) or ChatSigma (WhatsApp automation) — all share "Sigma" in the name but serve different markets.
Ready for deeper browser chat?
Skip the sign-in wall and side-panel friction. Download Tabbit — free AI chat built into every browsing session on Windows and Mac.