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Sider vs Voila

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. Both start at $10. Both have a free tier.

SiderBrowser sidebar that puts GPT, Claude, Gemini, and other models next to any page you're reading.VoilaHotkey AI assistant in the browser and on the desktop for drafting, rewriting and asking about a page

Side by side

FactSiderVoila
CategoryBrowser Extensions & CopilotsBrowser Extensions & Copilots
Pricing modelFreemiumFreemium
Starts at$10 month$10 month
Public APINoNo
PlatformsWeb, Chrome Ext, Windows, macOS, iOS, AndroidWeb, macOS, Windows, iOS, Android, Chrome Ext
CompanySiderVoila
Launched—2023
Last verifiedSep 1, 2026Sep 6, 2026

What our research says

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

Voila

Voila's argument is availability rather than model quality: the same assistant answers on a hotkey in five browsers, two desktops and two phones, so you stop copying text into a chat tab. Pricing by request instead of by feature is honest and easy to reason about. What it does not offer is any way to automate — there is no API, no workflow builder, and the vendor stays anonymous about who runs it.

Pros

  • Extension covers Chrome, Firefox, Edge, Brave and Safari, plus Windows, macOS, iOS and Android apps
  • Works on the current page or selection via hotkey rather than requiring copy-paste into a chat
  • Handles pages, documents, images and YouTube transcripts as inputs, not just typed text
  • Request-count pricing gives every tier the same feature set, so you only pay for volume
  • Free tier is 250 requests with no card

Cons

  • Free tier is a one-off allowance, not a recurring monthly quota, so it runs out permanently
  • No API and no automation surface — everything is manual and interactive
  • The site names no company, address or jurisdiction; ownership had to be inferred from startup directories

Which one fits

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

Choose Voila if you need

  • Rewriting and replying inside email, docs and web forms without switching tabs
  • Summarising a page, PDF or YouTube transcript while you are already looking at it
  • People who want one assistant across browser, desktop and phone on one subscription

More comparisons

All Voila alternatives →Browse all Browser Extensions & Copilots →