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HARPA AI vs UniJump

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 have a free tier.

HARPA AIBrowser extension pairing chat models with web page automationUniJumpFree Chrome extension that opens ChatGPT in an overlay on any page with a keyboard shortcut

Side by side

FactHARPA AIUniJump
CategoryBrowser Extensions & CopilotsBrowser Extensions & Copilots
Pricing modelFreemiumFree
Public APINoNo
PlatformsWeb, Chrome ExtChrome Ext
CompanyHARPA AI TECHNOLOGIES LLC—
Launched—2023
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

HARPA AI

The strongest option if you want one extension that both discusses a page and acts on it, and it earns its price only if you actually build repeatable web workflows. For plain summaries and a chat sidebar, cheaper single-purpose extensions do the same job.

Pros

  • Commands run against the live DOM, so they work on pages behind a login
  • Bring-your-own-key and web-session modes keep running costs down
  • Registered EU entity with GDPR and ISO 27001 claims, unusual for an extension
  • Lifetime licence exists for people who refuse subscriptions

Cons

  • The command builder has a genuine learning curve
  • Token metering makes monthly spend hard to forecast
  • No developer API of its own, despite the automation positioning
  • Automations break when target sites change their markup

UniJump

A single-purpose shortcut: ChatGPT in an overlay instead of a separate tab, at no cost and with no account of its own. The catch is age - nothing on the site has moved since 2023, and an extension that rides someone else's web session is exactly the kind of thing that breaks quietly.

Pros

  • No signup, no key, no payment - it uses the OpenAI session you already have
  • Cmd/Ctrl+J overlay works on any site rather than needing a dedicated tab
  • In-place paraphrasing of selected text
  • Code is on GitHub, so behaviour is inspectable

Cons

  • Site copyright has read 2023 for three years, with no visible updates
  • Depends on an undocumented web session rather than the official API, so an upstream change can break it
  • Chrome only, and no company or maintainer is named

Which one fits

Choose HARPA AI if you need

  • Sales and research work that repeats the same extract-then-summarise loop across many pages
  • People who prefer bringing their own model API keys over another per-seat AI subscription
  • Watching pages for price or stock changes and firing alerts

Choose UniJump if you need

  • People who bounce to ChatGPT constantly and want it over the current page
  • Anyone unwilling to pay a subscription for a wrapper around a free service
  • Users who want a paraphrase shortcut on selected text

More comparisons

All HARPA AI alternatives →All UniJump alternatives →Browse all Browser Extensions & Copilots →