Best HARPA AI alternatives

Comparison

Tool	Price from	Free plan	Category
HARPA AI	55.4 PLN/mo	?	Browser extensions
MaxAI	12 USD/mo	yes	Browser extensions
Gemini in Chrome	97,99 PLN/mo	?	Browser extensions
Monica	8,3 USD/mo	yes	Chatbots & AI assistants
Sider	not listed	yes	Browser extensions
Merlin	not listed	yes	Chatbots & AI assistants
Opera AI	not listed	yes	Browser extensions
AIPRM	not listed	yes	Browser extensions
Microsoft Copilot	27.73 EUR/mo	trial	Chatbots & AI assistants

Each alternative in short

1. MaxAI

Browser extension that gives an AI assistant sidebar for reading, writing, summarizing and translating content on any webpage.

Yes, there is a free plan. Unlimited Free chat with the fast free AI model, 3 Pro chats per day, limited file uploads, basic browser features.

2. Gemini in Chrome

AI browsing assistant built into Google Chrome that answers questions about open tabs, summarizes pages and videos, and can act on web tasks.

The vendor does not state this clearly on the homepage or pricing page.

3. Monica

All-in-one AI assistant giving access to several leading AI models for chat, writing, translation, research and image creation.

Yes, there is a free plan. Free to add to Chrome as a browser extension, according to the page.

4. Sider

AI sidebar and browser agent that chats with multiple AI models, summarizes web pages, and automates browser tasks.

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.

5. Merlin

All-in-one AI assistant giving access to top chat models (ChatGPT, Gemini, Claude and more) for research, writing, coding and image creation.

Yes, there is a free plan. Free access to chat with top AI models, as the homepage describes it, with no sign-up required.

6. Opera AI

Free, accountless AI assistant built into the Opera browser that answers questions, summarizes tabs and files, and generates images.

Yes, there is a free plan. Free access to Opera AI with no log-in, including the AI image generator and access to OpenAI and Google models.

7. AIPRM

Browser extension for ChatGPT and Claude offering a library of ready-made prompts and tools to reuse your own prompts.

Yes, there is a free plan. Free version with access to 5,400+ public prompts, usable for an unlimited time; premium plans unlock higher quotas.

8. Microsoft Copilot

AI chat assistant from Microsoft for creating, brainstorming, learning and solving everyday problems, with a Microsoft 365 Copilot tier for work.

There is a free trial. Free trial offered for the Microsoft 365 Business Premium with Copilot plan (terms linked on the page). The free tier of the basic chat is not described in the provided text.

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