
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. ZeroGPT records 32,864,541 monthly visits with +19.7% growth and Freemium, Paid pricing.
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | ||
|---|---|---|
| Official Domain | sider.ai | zerogpt.com |
| Pricing Model | Freemium | Freemium, Paid |
| Monthly Visits | 2.64M (2,644,740) | 32.86M (32,864,541) |
| MoM Traffic Delta | -314.2K (-10.6%) |
| +5.41M (+19.7%) |
| Primary Market & Share | 🇺🇸 United States (13.3%) | 🇺🇸 United States (43%) |
|---|
| Direct Visits / mo | 1.7M | 8.22M |
|---|
| User Rating | 4.5 | 3.8 |
|---|
| 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 content detection and a full writing toolkit in one place
Paste up to 15,000 characters or upload a file and get a highlighted breakdown of which sentences appear AI-written, plus an overall percentage score and a downloadable PDF report.
Beyond text, ZeroGPT offers an AI image detector and an AI video detector that performs frame-level analysis to flag generated or manipulated visuals.
Compare your text against billions of sources through the plagiarism checker, or rewrite and humanize AI text with the paraphraser and AI humanizer while keeping the original meaning.
A bundled writing suite covers summarization, grammar and spelling correction, translation across many languages, a dictionary, word and character counting, citation generation, and an AI email writer.

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.

SpecialistCross-platform writing assistant focused on real-time grammar and tone correction rather than AI content detection.
#3SpecialistPopular paraphrasing assistant focused on rewriting and grammar correction, but lacks dedicated AI detection scanners.
Industry-standard AI content detection trusted by educators, offering robust sentence-level analysis similar to ZeroGPT.

SpecialistAcademic editing platform pairing AI plagiarism detection with professional human proofreaders for student papers.

Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Combines reliable AI detection with advanced text humanization tools to rewrite machine-generated content naturally.

Enterprise-grade content verification suite detecting AI text, images, and source code across multiple languages.

Comprehensive content integrity platform specialized in accurate AI detection and plagiarism checking for digital publishers.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.

Multilingual AI content detection platform providing detailed sentence-level scoring and writing integrity utilities.
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.
SpecialistCross-platform writing assistant focused on real-time grammar and tone correction rather than AI content detection.
SpecialistPopular paraphrasing assistant focused on rewriting and grammar correction, but lacks dedicated AI detection scanners.
Industry-standard AI content detection trusted by educators, offering robust sentence-level analysis similar to ZeroGPT.
SpecialistAcademic editing platform pairing AI plagiarism detection with professional human proofreaders for student papers.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Combines reliable AI detection with advanced text humanization tools to rewrite machine-generated content naturally.
Enterprise-grade content verification suite detecting AI text, images, and source code across multiple languages.
Comprehensive content integrity platform specialized in accurate AI detection and plagiarism checking for digital publishers.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Multilingual AI content detection platform providing detailed sentence-level scoring and writing integrity utilities.