Comet is a Chromium browser that does not produce files and has no watermark issue; however, it is known to have a prompt injection vulnerability risk, and both official and third-party evaluations do not recommend using it for banking account or other sensitive data operations.
They also argued about these things on another page.
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Has a free plan
What Is This
Perplexity's AI browser integrating search engine and task automation; cross-tab synthesis and summarization.
Free Version Limitations
The complete Chromium browser with basic AI functions (page summary, voice mode, shopping assistant, Deep Research) is completely free and has no usage limit (globally available starting October 2, 2025); however, agent tasks that consume quota (such as auto-form filling, booking, and emailing) have limited quota in the free plan.
Free Usage Limit
Features
Free quota
Description
AI that understands
Analyzing the differences in reporting on the same event by different news media outlets
AI that builds
Assist in creating a basic website using a website generator
AI that emails
Drafting email replies and sharing future itinerary arrangements
AI that creates
Create a study plan based on the curriculum to help prepare for exams
AI that shops
Find and buy high-quality, comfortable and affordable office chairs
Quota Resets At
Basic AI functions have no usage limit; the quota for agent tasks is monthly, and the official website does not explicitly state the reset time.
Terms Of Use
Requires login to Perplexity account; free globally starting October 2, 2025 (initially only available to Perplexity Max subscribers for US$200/month when launched in July 2025)
Best for: Light users who need a small quota of agent tasks for personal use
US$5 / mo
Which Model
Perplexity AI (optimized by Comet)
Usage Quota
Monthly AI agents quota is 500 times (estimated, not explicitly stated on the official website)
Max Reading Time
Basic AI features are unlimited
This Plan Includes
Basic AI functions are unlimited (e.g. page summary, Deep Research, etc.)
Quota increase for AI agents
Priority queue
Monthly US$5
Not Included
Pro/Max has a higher quota and deeper integration
What Sets Us Apart
The paid plan with the highest CP value. Upgrading from the free version only costs US$5/month, with a significant quota increase; Pro/Max is for heavy users who need a large number of agent tasks.
Best for: Moderate users who need a stable quota for agent tasks on a daily basis
US$20 / mo
Which Model
Perplexity AI (Pro plan)
Usage Quota
Daily unlimited Pro search, Monthly 2000 quota for agent tasks (estimated)
Max Reading Time
Compared to Plus, the quota is doubled
This Plan Includes
Basic AI features are unlimited
300+ Pro searches daily
AI agent quota increased significantly
Background agent (automated execution of periodic tasks)
Priority Support
Monthly US$20
Not Included
Max's maximum limit
What Sets Us Apart
Most popular choice. 15 times the price of Plus, but with a 4x increase in agent quota and the addition of background agent functionality, suitable for heavy users who need to operate Comet multiple times a week.
The enterprise plan is priced at 10 times that of the Pro plan. It has unlimited agent tasks, making it suitable for teams that rely heavily on Comet for automating business processes, but is usually more than what individual users need.
The world's most widely used AI assistant, handling conversation, search, image generation, and voice all in one place
FreeNT$0/month, open to everyone. The official site lists the free-tier limits one by one: limited access to GPT-5.5 Instant, limited messages and uploads, limited and slower image generation, limited deep research, limited memory and context, limited Codex, limited ChatGPT Work desktop app. The only place the official site gives concrete numbers is the plan comparison table: free-tier GPT Instant total context window 27K (Go/Plus 54K, Pro 128K); free-tier single-input cap about 12 pages of text (Go/Plus about 40 pages, Pro about 250 pages); the context window for reasoning models is marked depends on the situation for the free tier (Go/Plus 256K, Pro 400K). Response time on the free tier is marked as limited by system resources and service conditions; only paid plans are fast. Chat history is unlimited on the free tier. Whether content is used for model training can be opted out of. The official site has never published a concrete messages-per-day figure, and this site does not fill in an estimate. (Read directly from chatgpt.com/zh-Hant/pricing over a Taiwan connection on 2026-08-09)
Long-form writing and document quality are its strengths, with the paid version including the Claude Code engineering tool
FreeThe quota is calculated based on a rolling 5-hour usage window (not simply resetting at a fixed number every day), and general conversations can be used for around 10-20 times, excluding Claude Code.
Google has the deepest ecosystem integration of AI, with a generous free version and frequent discounts for student plans.
FreeNT$0/month, free to anyone with a Google account. Model available: Gemini 3.6 Flash; the official site states plainly that access to 3.1 Pro may vary, meaning free-tier access to Pro fluctuates and is not guaranteed. Features included on the free tier: image generation and editing, Deep Research, Gemini Live, Canvas, Gems, Gemini Notebook (research and writing), the Google Flow creative studio, plus limited usage of Nano Banana Pro. Cloud storage 15 GB (shared across Gmail/Drive/Photos). How the quota is counted and when it resets, in the official footnote's own words: the Gemini app measures usage limits by compute, which depends on prompt complexity, the features you use and conversation length; usage resets every 5 hours, up to a weekly usage cap. In other words the free tier is not a fixed number of messages per day but a compute allowance that resets every 5 hours plus an overall weekly cap; long conversations, Deep Research and image generation burn through it faster than plain chat. When the quota runs out you can buy AI credits. The official site does not publish the specific compute figure for the free tier. (Read directly from gemini.google/subscriptions over a Taiwan connection on 2026-08-09)
Looking for Comet deals, discounts or promo codes? We check the official site automatically every day, review changes by hand, and date-stamp every entry.
