AI Browser Comparison — ChatGPT Atlas vs Perplexity Comet vs Dia vs Gemini

An AI browser is a normal web browser with an AI assistant built into it — one that can see the page you're on, summarise a tab, answer questions about your open windows, and, in agent mode, click through and complete multi-step tasks for you. This page lines up the 7 agentic browsers a Sri Lankan student, freelancer or professional actually has to choose between — ChatGPT Atlas, Perplexity Comet, Dia, Gemini in Chrome, Edge Copilot Mode, Opera Neon and Brave (Leo) — across the facts that decide which one is right for you.

1. The comparison table

The table is a curated, sourced dataset — not a benchmark and not a “which is smartest” opinion score. Each row records facts straight from the vendor's own pages: the underlying AI model, whether it can act autonomously (agent mode: full, limited or none), whether there is a genuinely free tier, the entry paid price, supported platforms, the engine it's built on, whether the vendor trains on your data by default, one-click Chrome import, and Sri Lanka availability. The Pick-for-me toggles and the platform selector run entirely in your browser; nothing is sent anywhere.

2. The Pick-for-me filter

Each toggle you switch on only ever narrows the table: a browser must satisfy everyactive filter to stay in the set. Free-to-use keeps browsers with a real free tier; Agent mode keeps any browser whose agent mode is not “none”; Privacy-first keeps only browsers that don't train on your data by default; the platform selector requires a build for that OS. With all filters off, every browser shows in editor order.

The survivors are ranked by a transparent editor tiebreak (fuller, free, cross-platform agent browsers first), and the top pick is highlighted in the best-match strip. The tiebreak is the only editorial judgement on the page — every other cell is a sourced fact.

3. The cost calculator

Most of these browsers are free; what costs money is the underlying subscription that unlocks the heaviest agent use. The calculator is deterministic — pick a plan, a seat count and a billing period, and it applies the published price:

monthly billing → monthlyUSD = per_seat × seats; annualUSD = per_seat × 12 × seats

annual billing → annualUSD = annual_plan × seats; monthlyUSD = annualUSD ÷ 12

Annual-plan prices store the vendor's published yearly figure, so a discounted annual plan (Perplexity Pro bills USD 200/yr instead of 240) shows up as a real saving. A second arithmetic route, annualSavingsUsd(), recomputes month-to-month-for-a-year minus the annual plan and surfaces the difference as a verifiable “save USD X/yr” note. A Custom plan lets you price any subscription not listed.

4. The LKR column is indicative

USD figures multiply by a fixed CBSL middle rate of Rs 300per USD to produce the rupee columns. This is a constant, not a live feed — your bank's actual rate plus FX margin and card fees will differ by a few percent. For a live USD-to-LKR rate, use the Freelancer USD-LKR calculator in Related tools.

• OpenAI — Introducing ChatGPT Atlas (agent mode, availability)
• Perplexity — Comet browser (free, Comet Assistant, platforms)
• The Browser Company — Dia (AI-native browser, tiers)
• Google — Chrome / Gemini blog (Gemini in Chrome, AI Mode)
• Microsoft — Edge Copilot Mode (free, Windows/Mac)
• Opera — Neon agentic browser
• Brave — Leo AI (privacy stance, free tier)
• Central Bank of Sri Lanka — Exchange Rates (indicative LKR column)

Agent-mode, platform, privacy and pricing facts were last cross-checked against the official sources on 2026-07-11. LKR figures are indicative, using a fixed CBSL middle rate of Rs 300 per USD. This category changes fast — always verify current availability and pricing on the vendor's own page.