Dia is the browser for your best work. Get answers without having to ask, produce beautiful ready-to-share outputs, and stay focused in the best browser for your work day.
Free plan available
From $20 / month
Best AI Extensions Tools in 2026
AI browser extensions that sit alongside the pages you already use.
Compare AI browser extensions that work alongside the pages you already use: summarising, translating, rewriting and answering questions in place. Check permissions carefully, since extensions can see everything you browse.
D 
M 
H 
S 
M 
S 
6 AI tools
M H S M S 6 AI tools Every listing reviewed by our team
Featured placements always labeled
Verified profiles claimed by makers
Submit your tool★ FEATURED IN EXTENSIONS
M
Monica AI
UnclaimedPricing hidden
Monica - ChatGPT AI Assistant
H
HARPA AI
UnclaimedPricing hidden
HARPA AI Browser Agent
S
Sider
UnclaimedPricing hidden
AI Sidebar & Agent for the Browser
M
Merlin AI
UnclaimedPricing hidden
AI Chat - Chat with top AI models from ChatGPT, Gemini
D
Dia Browser
VerifiedFree Trial from $20 / month
Dia reads between the tabs
S
Strawberry
UnclaimedPricing hidden
Strawberry Browser
No tools match these filters.
Showing of tools
How to choose the best AI Extensions tools
AI browser extensions put an assistant next to whatever you are reading or writing. Summarise this page, translate it, rewrite this text box, answer a question about what is on screen.
What are AI Extensions tools?
Because they sit in the browser they see a great deal. Permissions and data handling deserve more scrutiny here than in almost any other category.
What matters most when comparing tools
- Permissions requested. Read what the extension asks for. Access to all sites is a lot of access.
- Data handling. What page content is sent off-device, and whether it is retained.
- Models available. Some extensions bundle several models for one subscription.
- Browser support. Chrome, Edge, Firefox and Safari coverage differs.
Match the tool to the job
Most teams get the best results by picking a tool built for the kind of design they do most often:
- Summarising long pages and videos
- Translating as you browse
- Rewriting text in any text box
- Asking questions about the current page
Quick comparison
| Tool | Best for | Pricing |
|---|---|---|
| Monica AI | Monica - ChatGPT AI Assistant | See listing |
| HARPA AI | HARPA AI Browser Agent | See listing |
| Sider | AI Sidebar & Agent for the Browser | See listing |
| Merlin AI | AI Chat - Chat with top AI models from ChatGPT, Gemini | See listing |
| Dia Browser | Dia reads between the tabs | Free Trial · from $20 / month |
| Strawberry | Strawberry Browser | See listing |
Free vs paid plans
Free plans in Extensions are usually enough to test a tool and handle occasional work. Paid plans typically lift usage limits, unlock the more advanced models or exports, and add the team features you need once more than one person is involved. Prices on this page come from each tool's own pricing page, so confirm on their site before you buy.
Tips for better results
- Install only extensions you will genuinely use. Each one is an ongoing permission grant.
- Review what the extension can access, and disable it on sites where it has no business.
- Prefer extensions that let you choose when to send page content, rather than sending it constantly.
- Check the publisher and recent reviews; extensions change hands and behaviour after acquisition.
The bottom line
Start with the kind of work you do most, shortlist two or three tools built for it, and try their free plans on a real project. Compare how editable the results are, how well they fit your existing workflow, and what the exports look like before you pay for a year.
Ready to pick a tool? Browse all 6 AI Extensions tools with pricing and verified details.
Browse tools
Are AI browser extensions safe?
Reputable ones from established publishers generally are, but they have wide access by design. Read the permissions and the privacy policy before installing.
Do they slow the browser down?
A little, and it accumulates. Several AI extensions running at once is usually noticeable, so keep only the ones you use.
Can an extension see everything I browse?
If it requests access to all sites, technically yes. What it actually sends off-device depends on the extension, which is why the privacy policy matters.
Which AI Extensions tools are listed on Ai Product Index?
6 AI Extensions tools are listed, including Monica AI, HARPA AI, Sider, Merlin AI, Dia Browser, Strawberry. Verified listings show full features, pricing, and pros and cons.