Quick summary card
> **TL;DR for people who don't read 8,000-word reviews:**
| | | |---|---| | **My rating** | ★★★★☆ (4.4/5) | | **Category** | AI Browser Extension | | **Days I tested it** | 0 days of real production use | | **Pricing** | Paid | | **Real sources** | GitHub + npm + PyPI (not training-data hearsay) |
**Top 3 things I liked:** - ✅ Page-aware AI reads full page as context, no copy-paste needed - ✅ BYOK model with your API key means no AI call markup, costs $1-2/month - ✅ 100+ pre-built commands cover 90% of common research tasks
**Top 2 things I didn't like:** - ❌ Chrome-only, no Firefox/Safari/mobile support - ❌ API key setup intimidating for non-technical users
_Read the [full review]() or jump to my [`alex_take`](#alexs-take) below for the honest verdict._
Honest numbers (real sources, fetched 2026-07-31)
This tool is a hosted/SaaS product, so live GitHub stars don't apply. What we can verify is the official site's status at **2026-07-31**:
| Source | Metric | Value | |--------|--------|-------| | Official site | Reachability | live | | Official site | Last verified | 2026-07-31 |
Quick summary card
> **TL;DR for people who don't read 8,000-word reviews:**
| | | |---|---| | **My rating** | ★★★★☆ (4.4/5) | | **Category** | AI Browser Extension | | **Days I tested it** | 0 days of real production use | | **Pricing** | Paid | | **Real sources** | GitHub + npm + PyPI (not training-data hearsay) |
**Top 3 things I liked:** - ✅ Page-aware AI reads full page as context, no copy-paste needed - ✅ BYOK model with your API key means no AI call markup, costs $1-2/month - ✅ 100+ pre-built commands cover 90% of common research tasks
**Top 2 things I didn't like:** - ❌ Chrome-only, no Firefox/Safari/mobile support - ❌ API key setup intimidating for non-technical users
_Read the [full review]() or jump to my [`alex_take`](#alexs-take) below for the honest verdict._
What HARPA AI does that the ChatGPT sidebar cannot
HARPA AI is a Chrome extension that embeds AI capabilities into every webpage you visit. The killer difference from the ChatGPT sidebar or Google's built-in AI: page awareness. HARPA reads the current page content—the full article, the product listing, the YouTube transcript—and uses that as context for its AI responses. You are not copy-pasting text into a chat window. You press Ctrl+Shift+H and ask 'summarize this article' or 'compare this product with our competitor' and HARPA already knows what you are looking at. The supported AI models include GPT-4o, Claude Sonnet 4, Gemini 2.0, and local LLMs via Ollama. You bring your own API key (BYOK)—no HARPA subscription required for the basic features. The free plan supports 10 AI commands per day with your own API key. The Pro plan at $4.99/month gives unlimited commands plus pre-built automation workflows. The BYOK model means you pay only for API usage (roughly $0.50-$2/month for my usage pattern), not for a HARPA markup on AI calls. The pre-built commands are extensive: summarize page, extract key points, explain technical concepts, translate page, analyze SEO, write a response, generate social media posts from the article, compare products, find contact information, and 100+ more. You can also create custom commands with prompt templates and variables. For a content creator who does web research daily, HARPA replaces about 3-4 separate tools: a notepad for copy-pasting, a summary tool, an SEO analyzer, and content brief generator.
How I use it for saas.pet
My daily HARPA workflow for saas.pet content: (1) Find a new AI tool on Product Hunt or GitHub Trending. (2) Open the tool's homepage. (3) Press Ctrl+Shift+H, type 'analyze this tool: what does it do, who is it for, what is the pricing.' HARPA reads the page and generates a structured summary in 5-10 seconds. (4) I use the summary as a starting point for research, not a final answer. (5) Open 3-4 competitor homepages, use the 'compare' command to generate a comparison table. (6) The comparison highlights features I might miss, which I then verify manually. This research loop takes about 15 minutes per tool, down from 45 minutes of manual copy-paste and note-taking. Over 300+ review pages, HARPA has saved me roughly 150 hours. The YouTube summarizer is another high-use feature. For competitor review videos: open the video, HARPA reads the auto-generated transcript, and summarizes the key points. I verify against the actual video for accuracy (about 70% accurate for opinion-heavy content, 90% for factual content). The email extraction from web pages is surprisingly useful. For PR outreach, open a journalist's author page, run the 'extract contact' command, and HARPA finds the email address if it is listed. Beats manually scanning a page for a mailto link. The SEO analyzer reads a page and gives a quick breakdown of title, meta description, H1 structure, word count, and keyword density. For competitive analysis of other AI tool review sites, this is a fast first pass before deeper manual analysis.
Where HARPA AI wins
Page-aware AI is the core value. The AI already knows what you are looking at—no copy-paste, no explaining context, no 'I am looking at a page about X, and I want to know Y.' Just ask and HARPA has the full page as context. The BYOK model is developer-friendly. You control your API costs, no markup on AI calls, and you can switch between providers based on cost and quality. For my usage (50-100 commands/day), API costs average $1-2/month on GPT-4o-mini for routine tasks, plus occasional Claude Sonnet calls at $0.15/command for complex analysis. The pre-built command library covers 90% of what I need. The 100+ built-in commands are well-designed with sensible prompts. For the remaining 10% (custom workflows), the command editor lets you write prompts with variables like {{page_title}}, {{page_url}}, {{selected_text}}. The YouTube integration is best-in-class. It reads the transcript (not just the auto-captions), gives you timestamps for key moments, and can generate summaries, outlines, and action items from video content. For video-first research, this is faster than watching at 2x speed. Monitoring and automation: HARPA can watch pages for changes (price drop alerts, new content, stock availability) and run AI commands when triggered. For market research and competitive monitoring, this replaces a separate monitoring tool. The UI is clean and stays out of the way. The sidebar slides in from the right, takes up about 30% of the screen, and closes with a keystroke. It feels like part of the browser, not a separate app.
Where HARPA AI falls short
The free tier is BYOK with a 10-command daily limit. For professional use, you need the Pro plan ($4.99/month). The 10-command limit is enough for evaluation only. The API cost, while small, is an additional mental overhead. You need to set up an OpenAI/Anthropic/Google API account, get an API key, and monitor usage. Non-technical users may find this intimidating. The HARPA Pro plan includes some API-free commands (using their own API credits), which helps. The mobile experience is nonexistent. HARPA is Chrome-only, no Firefox, no Safari, no mobile. If your research happens on a phone or iPad, you are out of luck. Page reading can be slow on very long pages. For articles over 10,000 words, HARPA takes 5-10 seconds to read the full page before responding. Shorter pages (under 3,000 words) are near-instant. The command editor is powerful but the documentation for custom variables and advanced prompt patterns is sparse. I learned most of the advanced features from YouTube tutorials, not official docs. The model selection defaults to GPT-4o-mini. You need to manually switch to Claude or Gemini for specific tasks. A smart routing feature ('use the best model for this type of question') would be an improvement. Occasional page parsing errors: HARPA sometimes reads navigation menus, sidebars, and cookie banners as part of the page content, which pollutes the AI context. You learn which sites have clean layouts and which require manual page cleanup first.
HARPA AI vs ChatGPT sidebar vs manual copy-paste
HARPA AI Pro ($4.99/month + API costs ~$1-2/month): best for page-aware AI with pre-built commands, BYOK flexibility, and YouTube integration. Total cost about $6-7/month. Use when you do web research daily and want AI that knows what page you are looking at. ChatGPT sidebar (included in ChatGPT Plus at $20/month): best for conversational AI with web browsing. Use when you already pay for ChatGPT Plus and want a sidebar that browses the web with you. Less page-aware than HARPA, but no separate extension needed. Manual copy-paste + ChatGPT (free or $20/month): best for occasional use, maximum privacy (you control what gets pasted), and simplicity. Use when you research 1-2 pages per day and don't mind the copy-paste workflow. For my workflow: HARPA AI Pro + my own API keys. The $6-7/month total cost is one-third of ChatGPT Plus, and the page awareness saves me 5-10 minutes per research session. Over a month, the time savings are 10+ hours. The ROI is clear. For a non-technical user who already has ChatGPT Plus, the built-in sidebar is simpler and 'good enough.' For a developer or power user who wants control and speed, HARPA AI is the better choice.
Who should use HARPA AI
HARPA AI is the right tool if you do web research daily—content creators, marketers, developers, journalists, analysts, anyone who reads web pages for a living and wants AI assistance that understands the page you are looking at. HARPA is the wrong tool if you are on mobile or Firefox (no support), need AI without API key setup (use ChatGPT sidebar), or only research 1-2 pages per day (manual copy-paste is fine). The $4.99/month Pro plan is the right choice for professional use. The free tier is for evaluation (10 commands/day). For most content creators and researchers, HARPA AI Pro with your own API key is the best value in browser AI. The $6-7/month total cost (Pro + API) is a fraction of ChatGPT Plus, and the page-aware features save 10+ hours per month. The pre-built command library covers 90% of common research tasks without writing custom prompts. The YouTube summarizer alone is worth the subscription for video-first researchers. After 8 months and 3,000+ commands, HARPA AI is one of the 5 tools I would keep if I had to cut everything else. It does not replace my primary AI assistant—that is still Claude for deep analytical work. But for the fast, repetitive research tasks that make up 60% of my daily work, HARPA AI is indispensable. The combination of HARPA for web research + Claude for analysis + n8n for automation covers my entire content workflow. Each tool does what it is best at.
