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Glarity vs Sider

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. Sider publishes a starting price ($10); Glarity does not. Both have a free tier.

GlarityBrowser sidebar that summarises video, pages, PDFs and emailSiderBrowser sidebar that puts GPT, Claude, Gemini, and other models next to any page you're reading.

Side by side

FactGlaritySider
CategorySummarizationBrowser Extensions & Copilots
Pricing modelFreemiumFreemium
Starts at—$10 month
Public APINoNo
PlatformsWeb, Chrome ExtWeb, Chrome Ext, Windows, macOS, iOS, Android
CompanyFelo Inc.Sider
Last verifiedSep 6, 2026Sep 1, 2026

What our research says

Glarity

Solid if you read across languages all day and want summaries where the content already sits, but less compelling now that browsers and several free extensions do the same job. Cross-language reading is where it still earns its keep.

Pros

  • One extension covers YouTube, search, Twitter, Gmail and plain pages
  • Handles far longer inputs than the free tier of a general chatbot
  • Bring-your-own-key option avoids paying a second subscription
  • Available beyond Chrome, including Edge, Safari, Firefox and Opera

Cons

  • The pricing table only renders in JavaScript, so plans are hard to compare before signing up
  • Token metering makes cost unpredictable across long videos
  • No API, so it cannot be wired into a workflow
  • Site copy and footer still carry a 2024 date, which reads stale against the product

Sider

Sider puts a chat panel on top of whatever page you're on, so you can ask about an article or PDF without copying it into a separate tab. The catch is that heavier use beyond the free daily cap needs a paid tier, and pricing quoted across review sites is inconsistent, so the entry price is worth confirming before committing.

Pros

  • Works as a sidebar on any web page rather than a separate chat tab
  • Routes one prompt to several models (GPT, Claude, Gemini, DeepSeek, Grok)
  • Ships native apps for iOS, Android, Windows, and Mac plus browser extensions
  • Can chat with PDFs and YouTube videos, not just plain text

Cons

  • Free tier is capped at a small number of daily uses
  • Independent pricing write-ups disagree on exact plan costs depending on where you check
  • No public API for developers

Which one fits

Choose Glarity if you need

  • Reading long-form content in a second language
  • Skimming hour-long talks on YouTube for the relevant section
  • Triaging PDFs without opening a separate chat tab
  • Users who already hold an OpenAI key and want to spend it here

Choose Sider if you need

  • Reading and summarizing long articles or PDFs without leaving the page
  • Comparing answers from several models in one panel
  • People who want one subscription instead of several separate chatbot logins

More comparisons

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