Ctrly records 0 monthly visits with 0% month-over-month growth and Free pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
Insert your signature anywhere with Ctrl + Y
AI sidebar and browser agent for reading, writing and research
Insert your signature anywhere with Ctrl + Y
Insert your saved signature into documents and web forms instantly with a single keyboard shortcut.
Create a new signature or modify an existing one from your account, then reuse it everywhere.
A lightweight browser extension brings signature automation into the pages where you work.
Avoid repeatedly handwriting your signature on stacks of paperwork.
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.
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.
Electronic signatures and agreement workflows built into Dropbox
Electronic signatures and agreement workflows built into Dropbox
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.
Attendance, e-signature and AI-powered questionnaires for training providers
Attendance, e-signature and AI-powered questionnaires for training providers
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.
The best frontend for AI.
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.
Create, style and download a personal signature in your browser — free, with AI options
Create, style and download a personal signature in your browser — free, with AI options
