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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.

The short answer

Free plan
Both have one
Best fit
Sider: Reading and summarizing long articles or PDFs without leaving the page · Voila: Rewriting and replying inside email, docs and web forms without switching tabs
Trust score
About even — Sider 88, Voila 90
Status
Both up at our last check — Sider Oct 14, 2026, Voila Oct 15, 2026

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

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/mo
Trust score88 / 10090 / 100
PlatformsWeb, Chrome extension, Windows, macOS, iOS, AndroidWeb, macOS, Windows, iOS, Android, Chrome extension
CompanySiderUseful collective s.r.o.
Launched—2023
Last verifiedOct 14, 2026Oct 15, 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 and no workflow builder.

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
  • 'Unlimited' on Ultimate falls back to a smaller model after about 500,000 words a month

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

Sider vs Voila: the questions people ask

Is Sider cheaper than Voila?

Voila starts at $10/mo. Sider has a free tier; what its paid plans cost is not confirmed by us yet.

Does Sider or Voila have a free tier?

Both: Sider has a free tier, and Voila has a free tier.

More comparisons

All Voila alternatives →Browse all Browser Extensions & Copilots →