1. Monica AI
AI copilot for chat, translation and writing on any site.
Why it replaces Octopus AI Assistant: Covers similar ground in the AI category: AI copilot for chat, translation and writing on any site.
Best Octopus AI Assistant Alternatives in 2026
Octopus AI Assistant is a strong option, but it is not the right fit for everyone. Below are 10 alternatives compared on rating, install base, pricing and the use case each one actually wins on.
About Octopus AI Assistant
Octopus AI Assistant
Free
Full reviewComparison at a glance
| Extension | Rating | Users | Pricing | Best for |
|---|---|---|---|---|
| Octopus AI Assistant (original) | — | — | Free | Octopus AI Assistant |
| Monica AI | 4.9 | 3M+ | Freemium | People who want templates and translation alongside a general AI chat panel. |
| Merlin AI | 4.8 | 900K+ | Freemium | Generalists who want a single AI sidebar instead of five separate AI extensions. |
| Clearly Reader - Your AI Reading Assistant | — | — | Free | A browser extension with reader mode for optimal experience. Features copy, translate, speech, and PDF and Markdown export. |
| WPS PDF - Read, Edit, Fill, Convert, and AI Chat PDF with Ease | 4.5 | 6M+ | Free | Users who need a free all-in-one PDF editor, converter and signer in the browser. |
| AnyDoc Translator - Translate Web and PDF | — | — | Free | The ultimate AI translator for web, files, ebooks, academic papers, images, and text |
| Keplr | — | — | Free | Keplr is a browser extension wallet for the Inter blockchain ecosystem. |
| RetailMeNot: Codes, Cash Back and Coupons | — | — | Free | Automatically finds the best promo codes and cash back as you shop online. |
| Sumopaint - Online Image Editor | — | — | Free | Sumopaint is a full featured painting and image editing application. |
| Perplexity | 3.8 | 400K+ | Freemium | Researchers and analysts who need answers they can trace back to a source. |
| Gmail reverse conversation | 4.4 | 300K+ | Free | The add-on reverse emails in conversation view. |
Octopus AI Assistant alternatives in detail
View Extension
2. Merlin AI
One AI assistant for summarising, writing and answering on any page.
Why it replaces Octopus AI Assistant: Covers similar ground in the AI category: One AI assistant for summarising, writing and answering on any page.
3. Clearly Reader - Your AI Reading Assistant
A browser extension with reader mode for optimal experience. Features copy, translate, speech, and PDF and Markdown export.
Why it replaces Octopus AI Assistant: Covers similar ground in the AI category: A browser extension with reader mode for optimal experience. Features copy, translate, speech, and PDF and Markdown export.
4. WPS PDF - Read, Edit, Fill, Convert, and AI Chat PDF with Ease
Easy-to-use PDF tools to view, edit, convert, fill, e-sign PDF files, and more in your browser.
Why it replaces Octopus AI Assistant: Another popular AI extension: Easy-to-use PDF tools to view, edit, convert, fill, e-sign PDF files, and more in your browser.
5. AnyDoc Translator - Translate Web and PDF
The ultimate AI translator for web, files, ebooks, academic papers, images, and text
Why it replaces Octopus AI Assistant: Another popular AI extension: The ultimate AI translator for web, files, ebooks, academic papers, images, and text
6. Keplr
Keplr is a browser extension wallet for the Inter blockchain ecosystem.
Why it replaces Octopus AI Assistant: Another popular AI extension: Keplr is a browser extension wallet for the Inter blockchain ecosystem.
7. RetailMeNot: Codes, Cash Back and Coupons
Automatically finds the best promo codes and cash back as you shop online.
Why it replaces Octopus AI Assistant: Another popular AI extension: Automatically finds the best promo codes and cash back as you shop online.
8. Sumopaint - Online Image Editor
Sumopaint is a full featured painting and image editing application.
Why it replaces Octopus AI Assistant: Another popular AI extension: Sumopaint is a full featured painting and image editing application.
9. Perplexity
Answer engine with cited sources built into the browser.
Why it replaces Octopus AI Assistant: Another popular AI extension: Answer engine with cited sources built into the browser.
10. Gmail reverse conversation
The add-on reverse emails in conversation view.
Why it replaces Octopus AI Assistant: Another popular AI extension: The add-on reverse emails in conversation view.
Compare Octopus AI Assistant head-to-head
Direct comparisons with the extensions people weigh against it.
Monica vs Merlin AITwo all-in-one AI sidebars compared on model access, free quota and page context.Monica vs PerplexityA general AI assistant against a cited, search-first answer engine.Merlin AI vs PerplexityBoth are ai extensions people shortlist together for ai — see how ratings, install base, pricing and day-to-day use differ.All comparisonsThe full compare hub, grouped by category.
Explore further
Frequently asked questions
What is the best alternative to Octopus AI Assistant?
Monica AI is the closest match. Covers similar ground in the AI category: AI copilot for chat, translation and writing on any site.
Is there a free alternative to Octopus AI Assistant?
Yes — Clearly Reader - Your AI Reading Assistant, WPS PDF - Read, Edit, Fill, Convert, and AI Chat PDF with Ease, AnyDoc Translator - Translate Web and PDF are free.