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Side-by-side comparison ยท AI Browsers & Agents

Opera Neon vs Opera One vs Comet

Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.

Opera Neon

3.4

From $19.90/mo

Opera One

3.9

Free to start

Comet

3.9

From $5/mo

Comparing 3 tools, the maximum.

At a glance

Pick it if: Business owners and power users who want an AI that does web tasks for them and are happy to pay for access to several top models in one place.

Best value

Pick it if: Anyone who wants a free Chrome alternative with a capable AI sidebar, tab organisation and a built-in VPN, without paying for anything.

Pick it if: Anyone who researches, compares or reads a lot online and wants an AI helper in the browser without paying for it.

Overview

AttributeOpera NeonOpera OneComet
In one lineOpera's agentic AI browser that browses, researches and builds things for you.Opera's free everyday browser with a built-in AI sidebar that reads your tabs.Perplexity's free web browser with an assistant that reads your tabs and does tasks.
Pricing modelFreemiumFreeFreemium
Starting price$19.90/moFree$5/mo
Free plan Yes Yes Yes
Works with Claude Code Yes No No

Rating breakdown

Our scores out of 5. The higher bar in each row is highlighted.

AttributeOpera NeonOpera OneComet
Overall rating3.43.93.9
Ease of useHow quickly someone non-technical gets value from it.
3.0
4.5
4.5
FeaturesHow completely it covers its own job, and how well the pieces fit together.
4.5
3.0
4.0
Output qualityHow good the results are before you fix them.
3.5
3.5
3.5
Value for moneyWhat you get for the price, including the free plan.
3.0
4.5
4.0
Speed & reliabilityHow fast it is and how often it falls over.
3.0
4.0
3.5

Feature comparison

A tick means it does this today. A dash means we haven't checked.

AttributeOpera NeonOpera OneComet
Access & platform
Free plan Yes Yes Yes
Mobile app No Yes Yes
Desktop app Yes Yes Yes
Browser extension No No Yes
API access Yes No No
Teams & business
Team workspace No No Yes
Enterprise plan or SSO No No Yes
Connects to other apps Yes Yes Yes
Open source or self-hosted No No No
AI abilities
Works with your files Yes Yes Yes
Understands images Yes Yes Yes
Makes images Yes Yes No
Makes video Yes No No
Writes code Yes No No
Runs agents or automations Yes No Yes
Learns your brand or style No No No
Works in many languages Yes Yes Yes
Capabilities score11/ 178/ 1711/ 17

Pricing

Plans as listed on each vendor's site when we last checked. Confirm before you buy.

AttributeOpera NeonOpera OneComet
Plans

Free

Free

Trying Neon, or letting your own AI agent use a browser.

Free

Free

Everyone. There is no paid tier for the AI.

FreeOur pick

Free

Everyday browsing with an assistant for summaries and questions.

StandardOur pick

$19.90/mo

Anyone who wants Neon's agents to do web tasks for them.

Free with an Opera accountOur pick

Free

Anyone who wants chat history across devices and more images.

Comet Plus

$5/mo

Readers who want partner publishers' paywalled articles.

Perplexity Pro

$20/mo, or $200/yr

Anyone who wants the agent to do tasks for them.

Perplexity Max

$200/mo, or $2,000/yr

Heavy users running many tasks in the background.

Which plan to pickIf you're choosing Neon, it's for the agents, so Standard at $19.90 a month is the plan that matters. Month to month, so try it for one month on a real job. The free plan's chat is more basic than the free AI in Opera One, so only stay on Free if you want to plug in your own Claude or ChatGPT.It's all free. Sign in with a free Opera account if you want your chats saved and more images; otherwise just download it and click Ask AI. Opera sells a separate VPN Pro, but you don't need it for the AI.Use it free: the sidebar assistant alone is worth having, and most people never need more. Pro makes sense if you want Perplexity's research tools anyway, but don't buy it just for the browser agent, since Pro's credits are a one-off bundle. Nobody needs Max just for the browser.

Key features

AttributeOpera NeonOpera OneComet
Standout features
  • Neon Do
  • Neon Make
  • Deep research
  • Tasks and Cards
  • Top models in one place
  • Bring your own AI
  • Opera AI sidebar
  • Tab Islands
  • Files and video
  • Browser Connector
  • Built-in extras
  • Privacy switches
  • Comet Assistant
  • Browser control
  • Work mode
  • Works like Chrome
  • On every device
  • Comet Plus

Pros and cons

AttributeOpera NeonOpera OneComet
Pros
  • One of the strongest browser agents in reviews
  • Several top models from OpenAI, Anthropic and Google in one subscription
  • Free plan lets your own AI drive the browser
  • Tasks keep each project's tabs and chat together
  • Month to month, no annual lock-in
  • Free, with no account needed for the AI
  • Tab Islands make the AI's context easy to control
  • Handles files, YouTube videos and images, not just web pages
  • Free VPN, ad blocker and translator built in
  • Page access is off until you allow it
  • Free on Mac, Windows, Android and iPhone
  • Feels like Chrome, with your extensions and bookmarks
  • Answers about the page come with sources you can check
  • Comet Plus is included with Perplexity Pro and Max
  • Good at summaries and comparing tabs
Cons
  • $19.90 a month when Comet and Opera One have free AI sidebars
  • Three separate modes (Chat, Do, Make) confuse new users
  • Windows and Mac only, no mobile app
  • Still labelled experimental by Opera
  • Prompt injection risk, as with every AI browser agent
  • No agent: it can't click, fill in forms or finish tasks on sites
  • Browser Connector for ChatGPT and Claude is still an opt-in test feature
  • Opera doesn't say which Gemini model you get or publish chat limits
  • Sponsored speed dials and news on the start page by default
  • Repeated prompt-injection attacks found by researchers in 2025 and 2026; risky with logged-in accounts
  • The agent is slow and sometimes gets stuck or gives up halfway
  • Browser control moved behind Computer credits in September 2026, so Pro users lost an included feature
  • Paying users complain of quiet limits, model downgrades and features being removed
  • Amazon sued over its shopping agent, and the case is still running

Who each one is for

AttributeOpera NeonOpera OneComet
Best for
  • Handing off web chores like bookings and form filling
  • Deep research reports on a market or competitor
  • Building quick reports, pages or images from research
  • Letting Claude or ChatGPT use a real browser (free plan)
  • Summarising long pages and YouTube videos
  • Comparing suppliers or products grouped in a Tab Island
  • Quick drafts and translations while you browse
  • Keeping work and personal tabs organised
  • Summarising long pages, PDFs and videos
  • Comparing products or suppliers across tabs
  • Quick research while you browse
  • Hands-off form filling and bookings (Pro and Max)
You'll find it used by
  • Founders
  • Marketers
  • Researchers
  • Power users
  • Small business owners
  • Students
  • Researchers
  • Anyone switching from Chrome
  • Researchers
  • Marketers
  • Students
  • Founders

Questions people ask

Which is better, Opera Neon, Opera One or Comet?

They tie on our overall rating (Opera Neon 3.4/5, Opera One 3.9/5 and Comet 3.9/5). Opera Neon is best for handing off web chores like bookings and form filling and deep research reports on a market or competitor. Opera One is best for summarising long pages and YouTube videos and comparing suppliers or products grouped in a Tab Island. Comet is best for summarising long pages, PDFs and videos and comparing products or suppliers across tabs.

Which is cheaper, Opera Neon, Opera One or Comet?

Opera Neon: There's a free plan, and paid plans start at $19.90/mo. Opera One: It's free to use. Comet: There's a free plan, and paid plans start at $5/mo.

How we compare

Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.

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