Shortlist by what you need
Start here if you know why you are leaving HARPA AI.
Want the closest match?
MerlinMost similar to HARPA AI in what it does, its category and its price.
Visit (opens Merlin in a new tab)Need a free plan?
Notion AIHas a free plan, rated 4.5 out of 5.
Visit (opens Notion AI in a new tab)Want the lowest price?
Jeda.aiFrom $8.33/mo, the lowest starting price here.
Visit (opens Jeda.ai in a new tab)Want the best rated?
MaxAI.meRated 3.9 out of 5 in our review, against 3.6 for HARPA AI.
Visit (opens MaxAI.me in a new tab)
At a glance
Green means better than HARPA AI, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 HARPA AIBaseline | 3.6 | Free | Yes | Press Alt+A on any webpage to reach GPT-5.4, Claude 4.6, Gemini 3.1, DeepSeek or Llama - plus browser automation for data extraction, form filling and monitoring, used by 500,000+ professionals. | |
| Merlin | 4.0+0.4 | $15/mo | Yes | Browser AI assistant that brings ChatGPT, Claude, and other models to any website with one shortcut. | vs HARPA AI |
 UniJump | 3.4−0.2 | Free | Yes | Cmd+J anywhere on the web to summarize the page, rewrite a sentence, or translate on the spot - free, open source, no signup, stores no personal data. | vs HARPA AI |
| MaxAI.me | 3.9+0.3 | $30/mo | Yes | Browser extension that puts ChatGPT, Claude, and Gemini one click away on any website. | vs HARPA AI |
| Jeda.ai | 3.8+0.2 | $8.33/mo | Yes | Visual AI workspace that turns prompts and files into strategy frameworks, mind maps and diagrams, from a free plan. | vs HARPA AI |
 Prompt Builder | 3.4−0.2 | $9/mo | Yes | Version history and a library for prompts, across nine model families. | vs HARPA AI |
| Notion AI | 4.5+0.9 | $10/mo | Yes | AI woven into the workspace most PKM competitors get compared against | vs HARPA AI |
 AI Magicx | 3.8+0.2 | $19/mo | No | AI Magicx bundles 50-plus AI tools, including logo design, image generation, chatbots, and code assistance, into one subscription workspace. | vs HARPA AI |
 TubeOnAI | 3.9+0.3 | Free | Yes | Summarizes YouTube, podcasts, PDFs and web articles, then repurposes the content into blog posts and social copy - free tier forever, 150,000+ users. | vs HARPA AI |
The alternatives in detail
In order of how closely each one matches HARPA AI.
Merlin
4.0$15/mo
vs HARPA AI+0.4
Browser AI assistant that brings ChatGPT, Claude, and other models to any website with one shortcut.
- Ctrl/Cmd+M shortcut for AI access on any website
- Access to GPT-4, Claude 3 Opus, Gemini, DeepSeek, and Mistral Large from one interface
- Dedicated summarization for YouTube videos, PDFs, and articles
Free tier's 102 daily queries is generous enough for real evaluation before paying
'Unlimited fair access' marketing overstates a Pro plan that's actually credit-capped
UniJump
3.4Free
vs HARPA AI−0.2
Cmd+J anywhere on the web to summarize the page, rewrite a sentence, or translate on the spot - free, open source, no signup, stores no personal data.
- In-page AI chat access via keyboard shortcut or widget
- Text summarization and paraphrasing
- Sentence completion suggestions
Open-source code lets anyone verify its no-data-collection claim directly
Chrome-only currently, no support for other browsers
MaxAI.me
3.9$30/mo
vs HARPA AI+0.3
Browser extension that puts ChatGPT, Claude, and Gemini one click away on any website.
- One-click AI prompts embedded directly on websites like Gmail and LinkedIn
- Choice of underlying models including GPT-4, Claude, and Gemini
- Temperature Control for tuning output between factual and creative
Works inline across websites instead of requiring a separate chatbot tab
Free tier's 3 Pro chats a day pushes regular users toward the paid plan fast
Jeda.ai
3.8$8.33/mo
vs HARPA AI+0.2
Visual AI workspace that turns prompts and files into strategy frameworks, mind maps and diagrams, from a free plan.
- AI commands that turn prompts, CSV, Excel, PDF and Word files into visuals
- 300+ strategy frameworks such as SWOT, Porter's Five Forces and TRIZ
- Mind maps, flowcharts, diagrams, wireframes and infographics on one canvas
A wide framework library on a visual canvas
The free plan requires attribution and caps AI use at 10 runs a day
Prompt Builder
3.4$9/mo
vs HARPA AI−0.2
Version history and a library for prompts, across nine model families.
- Model-specific prompt generation across nine model families
- Prompt optimiser for existing prompts
- Library with reusable instruction blocks
Version history and reusable blocks, which prompt work badly needs
Paying credits for a model to write a prompt the target model would write free
Notion AI
4.5$10/mo
vs HARPA AI+0.9
AI woven into the workspace most PKM competitors get compared against.
- AI writing, summarization, and Q&A grounded in existing workspace content
- Built on Notion's established all-in-one docs and database platform
- Free tier for individual use
AI grounded directly in years of existing workspace content for established users
AI features and team collaboration require a paid plan
AI Magicx
3.8$19/mo
vs HARPA AI+0.2
AI Magicx bundles 50-plus AI tools, including logo design, image generation, chatbots, and code assistance, into one subscription workspace.
- 50+ AI tools spanning image, text, code, and audio in one workspace
- Multi-model chat access across GPT, Claude, and Gemini
- DeepResearch AI for cited, multi-step research reports
Broad tool coverage can replace several single-purpose subscriptions
No persistent free plan, only a no-card trial
TubeOnAI
3.9Free
vs HARPA AI+0.3
Summarizes YouTube, podcasts, PDFs and web articles, then repurposes the content into blog posts and social copy - free tier forever, 150,000+ users.
- Summarizes YouTube, podcasts, PDFs and web articles
- Repurposes content into blog posts, social copy and newsletters
- Channel subscriptions with automatic notifications
Repurposes into finished content formats, not just a condensed summary
User/satisfaction figures are vendor-reported marketing claims
FAQ
Questions people ask
Is HARPA AI free?
HARPA AI has a free plan.
What is the best free alternative to HARPA AI?
Notion AI is the highest-rated alternative here with a free plan (4.5 out of 5). Other free options: Merlin, MaxAI.me, TubeOnAI.
What is the cheapest alternative to HARPA AI?
Among paid plans, Jeda.ai has the lowest starting price (from $8.33/mo). If you need it free, start with Notion AI.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.