How do their growth rates compare?

Sider has a month-over-month growth rate of -10.6%; TabMate has —.

How does pricing compare?

Sider: Freemium. Freemium. Free tier available with limited credits; paid plans advertised at roughly US$10/month for occasional use up to around US$100/month at the top tier, with higher credit allowances and a dedicated cloud computer on the upper plans. TabMate: Free. TabMate is free. It is a free Chrome Web Store extension currently in Beta, with no paid tier described in its listing.

What are alternatives to Sider and TabMate?

Other tools in related categories include ChatGPT, Claude, Monica, Merlin AI, Tabbit Browser.

Head-to-Head Benchmark

Sider vs TabMate

Sider records 2,644,740 monthly visits with -10.6% month-over-month growth and Freemium pricing. TabMate records 0 monthly visits with — growth and Free pricing.

SiderFreemiumTraffic Leader

AI sidebar and browser agent for reading, writing and research

Monthly Visits

2.64M

MoM Velocity

-10.6%

Top Market

🇺🇸 United States

View Sider Analysis

sider.ai

TabMateFree

Let AI sort your open tabs into topic groups automatically

Monthly Visits

0

MoM Velocity

—

Top Market

🌐 Global

View TabMate Analysis chromewebstore.google.com

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Sider	TabMate
Official Domain	sider.ai	chromewebstore.google.com
Pricing Model	Freemium	Free
Monthly Visits	2.64M (2,644,740)	0 (0)
MoM Traffic Delta

Primary Market & Share	🇺🇸 United States (13.3%)	🌐 Global (—)

Direct Visits / mo	1.7M	0

User Rating	4.5	4.4

Supported Platforms	Website	Browser Extension

Sider

AI sidebar and browser agent for reading, writing and research

AI sidebar on any page

A persistent panel that reads the page you are on and answers follow-ups with GPT, Claude or Gemini without copying content into another tab.

Summarise and chat with documents

Summarise long articles, PDFs and YouTube videos, extract key points, and ask detailed questions about the source material.

Translation and read-aloud

Translate webpages, PDFs and images, compare bilingual output side by side, and have content read aloud for review on the move.

Sider Hand browser agent

Delegate multi-step tasks across real websites — price comparison, form filling, research and inbox triage — using your existing logged-in sessions.

Strengths & Pros

+Works inside the browser you already use, with no context switching
+Access to multiple frontier models from one subscription
+Strong reading toolkit: PDF chat, YouTube summaries, translation and read-aloud
+Increasingly capable agent features for multi-step browser tasks

Limitations

Frequently Asked Questions: Sider vs TabMate

Sider has 2,644,740 monthly visits, while TabMate has 0. Traffic estimates describe audience size, not product quality.

More Head-to-Head Matchups

Best Alternatives to Sider & TabMate (12)

–Useful credits run out quickly on the free and lower tiers
–Model availability and quota rules change over time, so expectations must be checked per plan
–Some agent and code features depend on a cloud machine and heavier plans

TabMate

Let AI sort your open tabs into topic groups automatically

Automatic topic grouping

TabMate reads the content of each page and sorts tabs on the same topic into a shared group, so related pages sit together.

Custom Smart Groups

Create your own Smart Groups to steer and fine-tune how the extension classifies your tabs.

Locked Groups

Lock a group to organise a collection of tabs manually without the AI rearranging them.

Keyboard-first control

Most actions can be triggered with the keyboard alone, speeding up tab sorting and switching.

Strengths & Pros

+Free Chrome extension with no subscription
+Automatic AI grouping removes the need to file tabs by hand
+Smart Groups and Locked Groups let you fine-tune or override the AI
+Keyboard-first design makes tab management fast

Limitations

–The extension is in Beta, so behaviour and features may still change

–It is experimental by design, so classification accuracy is not always perfect

–Requires broad access to tab content, web history and user activity to do its job, which may concern privacy-focused users

01

ChatGPT

6B/mo

SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

AI ChatbotFreemium+2.2%

02

Claude

1.3B/mo

SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.

AI AssistantFreemium+23.8%

#2

03

Monica

4.5M/mo

Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.

AI AssistantFreemium55% direct

Monica web app showing an AI chat conversation with model selector and sidebar tools

#3

04

Merlin AI

1.4M/mo

Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.

AI AssistantFreemium+13.1%

Merlin AI Chrome extension sidebar summarizing a webpage

05

Tabbit Browser

671K/mo

The agentic AI browser that reads your tabs, files, and screenshots as context

AI BrowsersFreemium85% direct

Tabbit Browser screenshot with the Agent task panel and Agentic Skills library visible

06

HARPA AI

537.5K/mo

One browser agent that combines every major AI model with web automation

AI AgentFreemium+99.3%

HARPA AI extension panel showing model selection and page-aware prompt shortcuts on a website

07

AI Toolbox

290.1K/mo

Organize, search and export your AI chats across ChatGPT, Gemini, Claude and Grok

AI Productivity ToolsFreemium+16.9%

Screenshot of an AI chat sidebar organized with AI Toolbox folders, search and export controls

08

Glarity

188.8K/mo

Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser

AI SummarizerFreemium7% direct

Screenshot of Glarity summarizing a YouTube video with timestamped highlights in the sidebar

09

Kome AI

174.9K/mo

Summarize, bookmark and write with AI right in your browser

AI SummarizerFreemium30% direct

Kome AI extension summarizing a long article and saving it to the bookmark library

10

Voilà AI assistant browser extension overlay showing chat, writing and summarise options

Voilà — AI Assistant, Chat and Writer

152.2K/mo

Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.

AI AssistantFreemium45% direct

Voilà — AI Assistant, Chat and Writer interface preview

11

Tabbit Browser

50.4K/mo

AI-native browser that understands your context and runs agent tasks

AI BrowsersFree+76.7%

Tabbit browser interface with AI chat, referenced tabs, and a vertical grouped tab sidebar

12

Mochii

27K/mo

One AI sidebar for ChatGPT, Claude and Gemini across the web

AI AssistantFreemium40% direct

Mochii web app interface displaying custom AI characters and a chat conversation

#1

Visit

ChatGPT

6B/mo+2.2%

Official

SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

AI Chatbot73% direct

Freemium

Visit

Claude

1.3B/mo+23.8%

Official

SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.

AI Assistant72% direct

Freemium

Visit

Monica

4.5M/mo

Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.

AI Assistant55% direct

Freemium

Visit

Merlin AI

1.4M/mo+13.1%

Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.

AI Assistant50% direct

Freemium

Visit

Tabbit Browser

671K/mo

The agentic AI browser that reads your tabs, files, and screenshots as context

AI Browsers85% direct

Freemium

Visit

HARPA AI

537.5K/mo+99.3%

One browser agent that combines every major AI model with web automation

AI Agent76% direct

Freemium

Visit

AI Toolbox

290.1K/mo+16.9%

Organize, search and export your AI chats across ChatGPT, Gemini, Claude and Grok

AI Productivity Tools32% direct

Freemium

Visit

Glarity

188.8K/mo

Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser

AI Summarizer7% direct

Freemium

Visit

Kome AI

174.9K/mo

Summarize, bookmark and write with AI right in your browser

AI Summarizer30% direct

Freemium

Visit

Voilà — AI Assistant, Chat and Writer

152.2K/mo

Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.

AI Assistant45% direct

Freemium

Visit

Tabbit Browser

50.4K/mo+76.7%

AI-native browser that understands your context and runs agent tasks

AI Browsers91% direct

Free

Visit

Mochii

27K/mo

One AI sidebar for ChatGPT, Claude and Gemini across the web

AI Assistant40% direct

Freemium

Sider vs TabMate

Side-by-Side Traffic & Specification Matrix

Sider

Strengths & Pros

Limitations

Frequently Asked Questions: Sider vs TabMate

How do Sider and TabMate compare in monthly traffic?

How do their growth rates compare?

How does pricing compare?

What are alternatives to Sider and TabMate?

More Head-to-Head Matchups

Best Alternatives to Sider & TabMate (12)

TabMate

Strengths & Pros

Limitations