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Eightify vs Monica

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. Eightify publishes a starting price ($4.99); Monica does not. Only Monica has a free tier. Only Monica ships a public API.

EightifyBrowser extension that turns a YouTube video into a timestamped summary and full transcriptMonicaMulti-model AI assistant living in a browser sidebar

Side by side

FactEightifyMonica
CategoryYouTube ToolsBrowser Extensions & Copilots
Pricing modelPaidFreemium
Starts at$4.99 month—
Public APINoYes
PlatformsWeb, Chrome ExtWeb, macOS, Windows, iOS, Android, API, Chrome Ext
CompanyRational Expressions Inc.Butterfly Effect Pte. Ltd.
Launched20232023
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

Eightify

A narrow tool that does one job well: decide whether an hour-long video is worth an hour before you spend it. The timestamped key points are the real feature, because they let you jump straight to the section you actually needed. The catch is that it is subscription-only for a job several free extensions and general assistants now also do.

Pros

  • Key points come with clickable timestamps, so the summary doubles as navigation
  • Handles very long recordings rather than capping at a few minutes
  • Output available in roughly 40 languages, including summarising an English video into another language
  • Works inline on the YouTube page instead of asking you to paste URLs elsewhere

Cons

  • No permanent free tier — after the trial it is pay or nothing
  • Summary quality is bounded by YouTube's auto-captions, which are poor on accented or technical speech
  • The vendor blocks automated access to its own site, so pricing and terms are hard to verify independently

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

Which one fits

Choose Eightify if you need

  • Skimming long conference talks, lectures or interviews before committing time
  • Pulling a rough transcript out of a video for notes or quoting
  • Watching material in a language you read better than you listen to

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

More comparisons

All Monica alternatives →Browse all YouTube Tools →