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

Sider records 2,644,740 monthly visits with -10.6% month-over-month growth and Freemium pricing. superReply records 810 monthly visits with -32.3% growth and Freemium pricing.

AI email reply extension for Gmail and Outlook — free for your first 90 replies a month
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | sider.ai | superreply.co |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 2.64M (2,644,740) | 810 (810) |
| MoM Traffic Delta | -314.2K (-10.6%) |
| -386 (-32.3%) |
| Primary Market & Share | 🇺🇸 United States (13.3%) | 🇮🇳 India (90.4%) |
|---|
| Direct Visits / mo | 1.7M | 312 |
|---|
| User Rating | 4.5 | 4 |
|---|
| Supported Platforms | Website | Website |
|---|
AI sidebar and browser agent for reading, writing and research
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 long articles, PDFs and YouTube videos, extract key points, and ask detailed questions about the source material.
Translate webpages, PDFs and images, compare bilingual output side by side, and have content read aloud for review on the move.
Delegate multi-step tasks across real websites — price comparison, form filling, research and inbox triage — using your existing logged-in sessions.

AI email reply extension for Gmail and Outlook — free for your first 90 replies a month
The extension appears directly in Gmail and Outlook web, so you never leave the thread you are answering.
Pick the tone of voice that fits the situation — professional for a client, casual for a friend — and the suggestions adapt.
A single click surfaces several ready-to-send reply options so you are never stuck staring at a blank compose box.
Beyond Gmail and Outlook, superReply integrates with Chrome, WhatsApp, Slack, LinkedIn, Upwork and Fiverr.

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

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

The AI productivity suite with agents, email, and docs that work wherever you do

Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.

Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.

Turn a few key points into polished, on-tone emails

An AI email assistant that drafts, summarizes, and perfects your messages in place
One AI sidebar for ChatGPT, Claude and Gemini across the web
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
The AI productivity suite with agents, email, and docs that work wherever you do
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
Turn a few key points into polished, on-tone emails
An AI email assistant that drafts, summarizes, and perfects your messages in place
One AI sidebar for ChatGPT, Claude and Gemini across the web