Side by side
| Feature | Sider | HARPA AI |
|---|---|---|
| What it does | AI sidebar and browser agent that chats with multiple AI models, summarizes web pages, and automates browser tasks. | Chrome extension giving access to many AI models on any web page, for summarizing, writing, research and web automation. |
| Price from | not listed | 55.4 PLN/mo |
| Free plan | yes | ? |
| Platforms | chrome, ios, android, mac, windows, web | web |
| API | not stated | not stated |
Sider: key features
- AI sidebar on any webpage
- Chat with GPT, Claude, Gemini, Grok and other models
- Summarize web pages and long articles
- Browser task automation and form filling
- Translate webpages, PDFs and images
- Deep research and Gmail inbox triage
HARPA AI: key features
- Access to multiple AI models (GPT, Claude, Gemini, DeepSeek, Perplexity, Llama) in one extension
- YouTube, PDF and web page summarizer
- Gmail assistant that categorizes emails and drafts replies
- Writer that mimics your style, including articles of up to 25,000+ words
- Price drop and page change monitoring
- Browser automation with Zapier, Make.com and n8n integration
FAQ
Is Sider or HARPA AI better?
It depends on the job - compare prices, free plans and features in the table above.
Are Sider and HARPA AI free?
Sider: Yes, there is a free plan. The pricing page lists a free tier for translation (basic model) and the Chrome extension itself; the exact free credit allowance is not stated in the text. HARPA AI: The vendor does not state this clearly on the homepage or pricing page.