HARPA AI
Verified Oct 15, 2026 ActiveBrowser extension pairing chat models with web page automation
Listed on EffectHub ·
Pricing
- Pricing model
- Freemium
Free DEMO plan with web-session use limited to about 10 messages a day; paid S1 ('for Everyone', 75 megatokens a year) and S2 ('for Pros', 225 megatokens a year) are quoted per month billed annually, plus a one-time lifetime X plan for a single user and megatoken top-ups. The page localises currency by visitor location and showed only Polish zloty to our fetch, so no USD price is recorded.
Use tool ↗About HARPA AI
HARPA AI adds a chat sidebar to any page in Chromium browsers and can act on that page: summarising articles and YouTube videos, drafting replies inside Gmail, pulling structured data out of search results and replaying saved multi-step commands. Requests can be routed through hosted models, through your own OpenAI, Azure or OpenRouter keys, or through an existing logged-in web session instead of paid API calls. Paid plans are metered in token bundles rather than seats, and a one-time lifetime licence is sold alongside subscriptions.
- Platforms
- Web · Chrome extension
- API
- Not confirmed
- Last verified
- Oct 15, 2026
Verified sources
- Pricing page: S1 'for Everyone' with 75 megatokens a year and S2 'for Pros' with 225 megatokens a year, billed annually; lifetime 'for Life' plan paid once, single user; prices shown in local currency (zł) to a European visitor (15 October 2026)harpa.ai ↗
- Terms of Service: the site, browser extensions and HARPA Web Browser are operated by HARPA AI TECHNOLOGIES LLC, registered at Vesirattaantie 4, Espoo, Finland (15 October 2026)harpa.ai ↗
Is HARPA AI legit?
We don’t label tools safe or unsafe. Below are the records we checked ourselves, each with the date we read it.
- Domain registered
- Jan 13, 2021 (5 years ago)Registry record (RDAP), registrar 1API GmbH, looked up Sep 6, 2026
- TLS certificate
- Issued by Google Trust Services, valid until Jan 6, 2027Seen in our own connection to the site on Oct 15, 2026
- Last checked
- Oct 15, 2026The site answered
- Operated by
- HARPA AI TECHNOLOGIES LLC, FinlandOur research, card verified Oct 15, 2026
Pros & cons of 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
Best for
- 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
Not for
- Teams needing server-side or headless runs; everything executes in your browser
- Firefox-first or Safari users, since Chromium builds get the attention
Watch out: Everything runs inside your own browser session, so a closed laptop means nothing runs. This is not a scheduled cloud agent.
Alternatives to HARPA AI
HARPA AI head-to-head
Side-by-side fact sheets against the competitors our research or their makers name — pricing, platforms, API and both verdicts on one page.