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Monica 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. Voila publishes a starting price ($10); Monica does not. Both have a free tier. Only Monica ships a public API.

MonicaMulti-model AI assistant living in a browser sidebarVoilaHotkey AI assistant in the browser and on the desktop for drafting, rewriting and asking about a page

Side by side

FactMonicaVoila
CategoryBrowser Extensions & CopilotsBrowser Extensions & Copilots
Pricing modelFreemiumFreemium
Starts at—$10 month
Public APIYesNo
PlatformsWeb, macOS, Windows, iOS, Android, API, Chrome ExtWeb, macOS, Windows, iOS, Android, Chrome Ext
CompanyButterfly Effect Pte. Ltd.Voila
Launched20232023
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

Monica

Worth it if you want one subscription that reaches GPT, Claude and Gemini from wherever you already are; pointless if you live inside a single vendor's app and are happy there. The value is the sidebar and the model switching, not the intelligence, which is all rented.

Pros

  • Genuinely wide model roster, including image and video models, under one credit pool
  • Extension plus desktop plus iOS/Android means the same history follows you across devices
  • Separate prepaid developer API at platform.monica.im if you want the same aggregation in code

Cons

  • Prices are only visible after loading the pricing app, and the tier names have already shifted once (Unlimited became Max)
  • Advanced credits reset monthly, so heavy image or video use burns a Pro plan fast
  • You are a reseller's customer — outages, rate limits and model deprecations arrive second-hand
  • monica.cn is a separate China-market build run by a different legal entity, which confuses support and privacy expectations

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 Monica if you need

  • People who compare answers across GPT, Claude and Gemini without paying three subscriptions
  • Reading and summarising foreign-language pages and PDFs in-place while browsing
  • Light users who want AI attached to the browser rather than in another tab

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 Monica alternatives →All Voila alternatives →Browse all Browser Extensions & Copilots →