Continual Engine (CE) records 16,625 monthly visits with -40.5% month-over-month growth and Contact for Pricing pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
AI-led digital accessibility for documents, images, video and websites
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | | |
|---|---|---|
| Official Domain | continualengine.com | sider.ai |
| Pricing Model | Contact for Pricing | Freemium |
| Monthly Visits | 16.63K (16,625) | 2.64M (2,644,740) |
| MoM Traffic Delta | -11.34K (-40.5%) | -314.2K (-10.6%) |
| Primary Market & Share | 🇺🇸 United States (57.7%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 6.54K | 1.7M |
| User Rating | 4.1 | 4.5 |
| Supported Platforms | Website | Website |
AI-led digital accessibility for documents, images, video and websites
Automated remediation for PDFs, Word files and scanned pages, including complex tables, with CMS and LMS integrations and a Canvas LTI app.
Generates consistent, high-quality image descriptions across mathematics, science, engineering and other specialist subjects at publishing scale.
Closed captions, transcripts and extended audio descriptions for video and audio content, produced with automated plus human review workflows.
ContinuA11Y plugin, colour contrast checker and an audit API for hosted PDFs to find and fix website barriers.
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.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
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.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
Free / Open-sourceFree online OCR that turns any image into editable text in seconds
Free / Open-sourceFree online OCR that turns any image into editable text in seconds
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Free / Open-sourceFree AI-powered PDF editor, converter and reader for every device
Free / Open-sourceFree AI-powered PDF editor, converter and reader for every device
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
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-sourceAI document conversion for math, chemistry, tables and full PDFs
Free / Open-sourceAI document conversion for math, chemistry, tables and full PDFs
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
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.
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.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
Free / Open-sourceAI-driven web accessibility for ADA, EAA and WCAG compliance
Free / Open-sourceAI-driven web accessibility for ADA, EAA and WCAG compliance
