What is the best free alternative to Opera Browser AI (Aria)?
Sider is the closest free alternative to Opera Browser AI (Aria): same Browser Extensions & Copilots sub-category, and it is free tier + paid. ChatGPT/Claude/Gemini in a browser sidebar
Best free Opera Browser AI (Aria) alternatives
Looking for a free alternative to Opera Browser AI (Aria)? Here are 9 browser extensions & copilots worth trying — 9 with a free tier. Opera Browser AI (Aria) itself is free.
| Tool | Opera Browser AI (Aria) (you searched) | Sider | Monica | Merlin AI |
|---|---|---|---|---|
| Pricing | free | freemium | freemium | freemium |
| Best for | Free, native AI assistant built into Opera's mainstream and GX browsers, no separate app needed | ChatGPT/Claude/Gemini in a browser sidebar | All-in-one AI copilot for the browser | Works on any website |
| Visit | Open ↗ | Open ↗ | Open ↗ | Open ↗ |
Opera Browser AI (Aria) alternatives — straight answers
Are there free Opera Browser AI (Aria) alternatives?
Yes — 9 of the 9 alternatives listed here are free or freemium: Sider, Monica, Merlin AI, MaxAI.me, Page Assist. None of them are paid-only.
Is Opera Browser AI (Aria) free?
Opera Browser AI (Aria) is free. There is no paid plan attached to it in the catalog.
How were these Opera Browser AI (Aria) alternatives chosen?
They are the other tools in Browser Extensions & Copilots, then the rest of AI Chat & Assistants, ordered free tiers first and capped at 9. There is no sponsorship and no paid placement in that ordering — only the pricing tier decides.
All Opera Browser AI (Aria) alternatives
Browse Browser Extensions & Copilots →Sider
Browser Extensions & Copilots
✦ WhyA Opera Browser AI (Aria) alternative — ChatGPT/Claude/Gemini in a browser sidebar.
- ChatGPT/Claude/Gemini in a browser sidebar
- Summarize any page, PDF or YouTube video
- Translate, rewrite and explain selections
- Works across every website
Monica
Browser Extensions & Copilots
✦ WhyA Opera Browser AI (Aria) alternative — All-in-one AI copilot for the browser.
- All-in-one AI copilot for the browser
- Access to GPT, Claude & Gemini
- Writing, translation and search tools
- Desktop app and memo features
Merlin AI
Browser Extensions & Copilots
✦ WhyA Opera Browser AI (Aria) alternative — Works on any website.
- Works on any website
- Summarize YouTube, articles and PDFs
- Multiple frontier models in one place
- Social-media reply generator
MaxAI.me
Browser Extensions & Copilots
✦ WhyA Opera Browser AI (Aria) alternative — One-click rewrite, reply and summarize.
- One-click rewrite, reply and summarize
- Chat with any page or image
- Instant translation and grammar fixes
- Prompt library built in
✦ WhyA Opera Browser AI (Aria) alternative — Open-source (MIT) sidebar and ChatGPT-style web UI for local models via Ollama, LM Studio or Chrome's built-in Gemini Nano.
- Open-source (MIT) sidebar and ChatGPT-style web UI for local models via Ollama, LM Studio or Chrome's built-in Gemini Nano
- Chat with the current webpage without sending data to a cloud service
- Works on Chrome, Edge, Brave, Firefox, Vivaldi and Zen; about 8.2k GitHub stars
✦ WhyA Opera Browser AI (Aria) alternative — Gemini side panel that answers questions about the current tab and across tabs.
- Gemini side panel that answers questions about the current tab and across tabs
- Summarizes pages and videos, compares products
- Available on desktop and Android for US users; expanded to Canada, NZ, India and more
- Auto browse agent reserved for paid Google AI plans
Harpa AI
Browser Extensions & Copilots
✦ WhyA Opera Browser AI (Aria) alternative — AI web automation and monitoring.
- AI web automation and monitoring
- Track prices and page changes
- Scrape and summarize sites
- Custom command workflows
Brave Leo
Browser Extensions & Copilots
✦ WhyA Opera Browser AI (Aria) alternative — Built directly into the Brave browser sidebar — no separate site, no account, no signup required for free tier.
- Built directly into the Brave browser sidebar — no separate site, no account, no signup required for free tier
- Access to Claude, Mixtral and Llama models without opening a separate chatbot site
- Conversations never stored on Brave's servers and not used for model training
Dia
Browser Extensions & Copilots
✦ WhyA Opera Browser AI (Aria) alternative — AI-native Chromium browser (from the makers of Arc) with AI chat built into every tab, not bolted on as a sidebar.
- AI-native Chromium browser (from the makers of Arc) with AI chat built into every tab, not bolted on as a sidebar
- Free for light AI use; a Pro tier lifts the usage caps
- Now backed by Atlassian after its 2026 acquisition of The Browser Company