HARPA AI
Multi-LLM browser extension for chatting, summarizing, automating, and tracking prices across GPT, Claude, Gemini, and more. Open with Alt+A.
HARPA AI is the most versatile multi-model browser agent we've tested. It consolidates GPT, Claude, Gemini, and more behind one shortcut, and the automation features—price tracking, page monitoring, and Zapier integration—are genuinely useful. The token caps on lower tiers can bite heavy users, but for multi-LLM switchers, it's a strong value. If you only need one model for basic chat, a simpler extension like Monica might be cheaper, but HARPA wins on automation and model choice.
Verified 10d ago · liveness 82/100 · cite: rightaichoice.com/tools/harpa-ai
- Professionals who switch between multiple LLMs (GPT, Claude, Gemini) in one tool
- Marketers and SEO specialists needing audits, article generation, and SERP monitoring
- E-commerce shoppers tracking price drops and back-in-stock alerts
- Heavy email users wanting AI-assisted inbox management and drafting
- Users who only need a single AI chat model and don't need web automation
- Those seeking a full-featured free tier (DEMO is token-limited)
- People uncomfortable with browser extensions having page access, despite GDPR compliance
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Skip HARPA AI if you only use a single AI model for basic chat and don't need web automation, or if you're not comfortable granting a browser extension page access.
Going past your token balance (e.g., 75 Megatokens on Everyone) requires a $24 top-up for 20 Megatokens, which can add up quickly with heavy use.
HARPA's annual pricing at $13.2/mo (Everyone) is cheaper than subscribing to ChatGPT Plus ($20/mo) and Claude Pro ($20/mo) separately, and it bundles web automation. However, if you only need one model, a single subscription like ChatGPT Plus might be more cost-effective. For multi-LLM users, HARPA is a strong value.
In short
HARPA AI — Multi-LLM browser extension for chatting, summarizing, automating, and tracking prices across GPT, Claude, Gemini, and more. Open with Alt+A. Best for Professionals who switch between multiple LLMs (GPT, Claude, Gemini) in one tool, Marketers and SEO specialists needing audits, article generation, and SERP monitoring, E-commerce shoppers tracking price drops and back-in-stock alerts. Free to start; paid plans from $13.2/mo.
What people actually say about HARPA AI — is it worth it?
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
44 mentions across 6 sources (Hacker News, YouTube, Product Hunt, Bluesky, Stack Overflow, Lemmy) · researched Jul 25, 2026.
Average across the 6 sources that answered — each source counts once, not each post.
- +Access to multiple top-tier LLMs in one extension.
- +Page-aware actions: summarize, rewrite, translate on any site.
- +YouTube summarization with timestamps works reliably.
- +Gmail integration for categorizing and drafting replies.
- +SEO audits and keyword extraction valued by marketers.
- −Free tier has strict token limits that constrain use.
- −No native mobile app or desktop standalone version.
- −Setup complexity for advanced automation features is high.
- −Limited negative reviews make reliability assessment hard.
- −Cloud-based AI models may raise privacy concerns for some.
- • Using your own API keys may incur additional charges from third-party models
Viability Score
How well maintained and how widely used is HARPA AI? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: September 2026
How we score →Key Features
- Multi-LLM access: GPT-5.4, Claude 4.6, Gemini 3.1 Pro, DeepSeek V3, Perplexity Pro, Grok 4.1, Llama 4
- Alt+A shortcut to open AI assistant on any web page
- YouTube summarizer with timestamps and video Q&A
- Gmail assistant: categorize, summarize, draft replies in your tone
- Writer that mimics your writing style for emails, tweets, articles
- SEO-optimized article generation: 25,000+ words, 25 frameworks
- AI-driven SEO audit and long-tail keyword extraction
- Price-drop and back-in-stock alerts on Amazon, eBay, Walmart, AliExpress
- Web page monitoring with change alerts
- Custom GPT agents with page access and automation
- Scheduled commands (Pro and Life tiers)
- 100+ prebuilt page-aware prompts
- Quick shortcuts: F (finish), G (grammar), P (rephrase), T (translate), S (search), E (explain)
- Midjourney/DALL-E prompt wizard with 30+ templates
- Language learning assistant: grammar correction, study plans
About HARPA AI
HARPA AI is a browser extension for Chrome, Edge, and Brave that acts as a multi-model AI copilot for your everyday web tasks. Press Alt+A to open a chat window on any page and call on GPT-5.4, Claude 4.6, Gemini 3.1 Pro, DeepSeek V3, Perplexity Pro, Grok 4.1, or Llama 4. It's designed for professionals who want one tool to replace separate ChatGPT, Claude, and Gemini subscriptions, and who need AI that understands the page you're reading. You can summarize YouTube videos with timestamps, zero out your Gmail inbox with categorization and drafting, mimic your writing style for emails and social posts, generate SEO-optimized articles up to 25,000 words, and audit your site's SEO with keyword extraction. HARPA goes beyond chat with automation: it can monitor e-commerce pages like Amazon and eBay for price drops and back-in-stock alerts, scrape data from any website, and trigger workflows through Zapier, Make.com, or n8n. You can build custom GPT agents with page access, schedule commands (on Pro and Life plans), and use over 100 page-aware prompts with shortcuts like F to finish, G for grammar, and T to translate. Privacy is a key focus: HARPA supports local models like Meta Llama, does not log your conversations, is GDPR compliant, and lets you bring your own API keys. The free DEMO plan is token-limited; paid plans start at $13.2 per month for the Everyone tier, which includes 75 Megatokens per year and access to all cloud models. If you switch between multiple AIs and need practical automation, HARPA forgoes a simple chat box for a full browser agent.
Behind the Verdict
HARPA AI is a serious contender for anyone who juggles multiple AI subscriptions and wants web automation. Its strength is breadth: you get access to seven different LLMs (GPT-5.4, Claude 4.6, Gemini 3.1 Pro, DeepSeek V3, Perplexity Pro, Grok 4.1, Llama 4) all in one extension. For a power user who pays for ChatGPT Plus, Claude Pro, and Gemini Advanced, HARPA could replace them all, with annual pricing at $13.2/mo for 75 Megatokens per year and $20.9/mo for 225. That's a saving if you use multiple models regularly. The automation features are a differentiator: you can monitor pages for price drops on Amazon, eBay, Walmart, and AliExpress, get back-in-stock alerts, and trigger workflows via Zapier, Make.com, or n8n. Marketers can automate SEO audits and long-tail keyword extraction, and writers can generate articles up to 25,000 words. The YouTube summarizer with timestamps is a killer feature. However, the token caps are a real constraint. The free DEMO is token-limited and may feel restrictive, and even the Everyone plan's 75 Megatokens per year could run out if you use heavy tasks like article generation or video summarization daily. You can top up tokens for $24 for 20 Megatokens, or bring your own API keys and pay directly to OpenAI, Anthropic, etc. Privacy is well-handled: local model support, no logging, GDPR compliance, and the option to use web sessions (connecting to your existing ChatGPT, Claude, or Gemini accounts) which don't consume your HARPA tokens. That is a clever way to stretch your allowance. Setup is straightforward: install the extension, press Alt+A, and you're ready. It's not a wrapper, because it has a substantial automation engine and data moat from its page-reading and scraping capabilities. The main downside is the learning curve: to unlock its full potential you need to explore the 100+ prompts and automation library. But for professionals who want to consolidate AI tools and automate their workflow, HARPA is a worthwhile investment.
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Real-world workflow fit
Concrete scenarios for the personas HARPA AI actually fits — and what changes day-one when you adopt it.
Monitor competitor product pages and generate weekly SEO reports.
Outcome: Set up price-drop alerts on Amazon and eBay, schedule a weekly SEO audit, and receive email notifications with changes, saving hours of manual checking.
Produce SEO-optimized articles for clients from YouTube transcripts.
Outcome: Use the YouTube summarizer to extract key points, then generate a 2,000-word article in a preferred framework, tweaking tone with the writer feature.
Manage email inbox and draft customer responses.
Outcome: Connect Gmail, let HARPA categorize incoming emails, summarize threads, and draft contextual replies in your tone, reducing inbox time significantly.
Use Cases
- Monitor competitor product pages for price drops and get email alerts
- Summarize a 2-hour YouTube video into key takeaways with timestamps
- Scrape job listings from multiple sites and extract skills/requirements into a spreadsheet
- Automate daily SEO audits of your website and generate improvement reports
- Craft personalized LinkedIn outreach messages using your writing style
- Translate and explain foreign language articles with grammar corrections
- Generate SEO-optimized blog articles from YouTube transcripts
- Set up a page monitor to check stock availability and auto-refresh
Models Under the Hood
as of 2026-08-31
Limitations
- Pricing tiers limit token allocations: the Everyone plan includes 75 Megatokens per year, Pro offers 225 Megatokens per year, and the Life plan provides 30 Megatokens.
- Advanced features such as scheduled commands and advanced automation are only included in Pro and Life plans.
- Users can bring their own API keys to control costs or use unlimited Web Session connections.
as of 2026-08-28
Verification history
We have re-verified HARPA AI 14 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
Showing the 6 most recent of 14 verification passes.
Free to cite with attribution — this page re-verifies continuously.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published HARPA AI tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
DEMO
$0/mo
Ideal for
New users exploring HARPA's basic features and interface without paying, but with token limits.
What this tier adds
Free entry point with token-limited usage and access to cloud models; limited to basic features and no scheduled commands.
Everyone
$13.2/mo (annual)
Ideal for
Individual professionals who use multiple AI models occasionally and want automation like price monitoring and page-aware responses.
What this tier adds
75 Megatokens/year, access to all cloud models, web session connections, and page monitoring; lacks scheduled commands and advanced automation.
Pro
$20.9/mo (annual)
Ideal for
Power users who need higher token allowance and advanced automation features like scheduled commands and advanced automation.
What this tier adds
Adds scheduled commands and advanced automation, triples token balance to 225 Megatokens/year, and includes all Everyone features.
Life
$264 one-time
Ideal for
Long-term users who prefer a one-time payment and want to use their own API keys or unlimited web sessions.
What this tier adds
One-time $264 payment, 30 Megatokens, unlimited web session connections for life, and includes all Pro features but no yearly token refresh.
Top Up (add-on)
$24 one-time
Ideal for
Users who run out of tokens and need a quick boost without upgrading their plan.
What this tier adds
One-time $24 for 20 Megatokens with a 25% discount on cloud models, available as an add-on to any plan.
Where the pricing makes sense
The company stage and team size where HARPA AI's pricing actually pencils out — and where peers do it cheaper.
HARPA's annual pricing at $13.2/mo (Everyone) is cheaper than subscribing to ChatGPT Plus ($20/mo) and Claude Pro ($20/mo) separately, and it bundles web automation. However, if you only need one model, a single subscription like ChatGPT Plus might be more cost-effective. For multi-LLM users, HARPA is a strong value.
Setup time & first value
How long it actually takes to get something useful out of HARPA AI — broken out by persona, not the marketing-page minute.
Setup takes under 5 minutes: install the extension, create an account, and press Alt+A to start chatting. For automation features like price tracking, you may need another 10 minutes to configure a monitor. For power automation with Zapier, expect 30 minutes to set up your first workflow.
Switching to or from HARPA AI
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From ChatGPT Plus: You can connect your ChatGPT account via Web Session to use it inside HARPA without migrating data; your chat history can be imported via ChatGPT's export and re-uploaded to HARPA.
- ↗To ChatGPT Plus: Export your HARPA chat history (if any) and rely on simple chat for basic needs; you'll lose automation features.
Integrations
Resources & Guides
Tutorials & Learning
Official links
Tools that pair well with HARPA AI
Common stack mates teams adopt alongside HARPA AI, with the specific reason each pairing earns its keep.
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Typli.ai
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