Summarize the open page
HARPA reads the page you’re looking at and produces a short or long summary, as a list, text, or a report. You can then ask questions about the page.
AI tools · Multi-assistant apps
HARPA AI pricing, use cases, and first steps
HARPA AI is an extension for the Chrome browser. It opens a panel on the side of any web page. In that panel, you use ChatGPT, Claude, or Gemini on the page you’re looking at: summarize it, reply to an email, pull information out of it. HARPA can also monitor a page and alert you when a price or a piece of text changes.
HARPA AI has a free plan. The recommended plan to start with: Demo, $0. Prices checked on October 3, 2026 on the vendor’s official page.
HARPA AIA panel in your browser to summarize and monitor pages- Vendor
- HARPA AI Technologies (Finland)
- Free plan
- Yes
- Recommended plan
- Demo, $0
- Page checked on
- October 3, 2026
What HARPA AI does
Who it’s for: people who spend their days in the browser: research, purchasing, prospecting, answering lots of email.
Summarize a YouTube video
HARPA reads the video’s captions and pulls out the key points. Videos without captions cannot be summarized.
Reply to an email
HARPA summarizes the message you received, then suggests a reply. You choose the tone and the general idea, it writes. It works in Gmail, Outlook, and ProtonMail, and also on LinkedIn.
Also
- Monitor a price or a page
- Three ways to reach the AI
- Ready-made commands, and your own
- Run a command at a set time
- Ask about an image or an area of the screen
HARPA AI pricing
HARPA publishes its prices in dollars. A “Megatoken” is a unit of usage. The vendor gives these benchmarks: 300 messages with a high-end model, or 100 YouTube video summaries. A top-up of 20 “Megatokens” sells for $22.50.
| Plan | Price | Who it’s for |
|---|---|---|
| Demo Recommended to start | $0 | Trying the tool |
| For Everyone | $12 per month, billed yearly | Regular use |
| For Pros | $19 per month, billed yearly | Automating tasks |
| For Life | $240 one-time payment | People who already have a subscription to an assistant |
What the free plan includes
A demo plan: the built-in commands, your own commands, and page monitors. Access through your ChatGPT, Claude, or Gemini account is limited to 10 messages per day, and the total is capped at 100 command runs.
Nova’s advice
Start with the demo: ten messages a day are enough to see whether summaries and email replies are useful to you. Pay only if you use it every day. If you already have a ChatGPT or Claude subscription, first compare with what that subscription does on its own in the browser.
A first try, in 4 minutes
Your data. Your conversations stay in your browser. A page’s content is sent to the assistant you chose only when you ask.
What it does less well
- Reading and summarizing a page works well. Multi-step automations (click, fill in, chain actions) are built by hand in an editor: this is not a tool that figures things out by itself, and it is not a beginner’s task.
- Monitors and scheduled commands only run if your browser stays open on your computer.
One-click article summaryHARPA AI- Open a long article, for example a news story about your industry.
- Press Alt + A (Windows) or Control + A (Mac) to open HARPA.
- Click “SHORT SUMMARY,” or type / and choose “/summary.”
- Choose the shape of the summary: bullet list, text, or report.
- Ask a follow-up question in the panel: “What does this change for a purchasing department?”
Alternatives to HARPA AI
Merlin AI
A simpler extension, with several assistants included and no separate account.
Monica
An all-in-one side panel, with apps for computer and phone.
Sider
A side panel for reading, summarizing, and writing, also available on phones.
Comet
If you prefer a whole browser with a built-in assistant, rather than an extension.
Frequently asked questions about HARPA AI
How much does HARPA AI cost?
Demo: $0; For Everyone: $12 per month, billed yearly; For Pros: $19 per month, billed yearly; For Life: $240 one-time payment. Prices checked on October 3, 2026 on the vendor’s official page.
Can you use HARPA AI for free?
Yes. A demo plan: the built-in commands, your own commands, and page monitors. Access through your ChatGPT, Claude, or Gemini account is limited to 10 messages per day, and the total is capped at 100 command runs.
What happens to my data with HARPA AI?
Your conversations stay in your browser. A page’s content is sent to the assistant you chose only when you ask.
What are the alternatives to HARPA AI?
Merlin AI: A simpler extension, with several assistants included and no separate account. Monica: An all-in-one side panel, with apps for computer and phone. Sider: A side panel for reading, summarizing, and writing, also available on phones. Comet: If you prefer a whole browser with a built-in assistant, rather than an extension.
Official pages consulted
Page checked on October 3, 2026. Brands are named to identify the tools. No affiliation.