Brave Leo vs Opera Aria vs Dia by The Browser Company vs Microsoft Edge Copilot
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
Brave Leo
AI assistant built into the Brave browser
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Opera Aria
Opera's free built-in AI sidebar — now rebranded Opera AI
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Dia by The Browser Company
AI-native browser from the makers of Arc
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Microsoft Edge Copilot
Copilot woven into Edge — multi-tab reasoning, voice, vision, Journeys
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| RECATOOLS Score | 7 / 10 | 7 / 10 | 7 / 10 | 7.5 / 10 |
| Capability | — | — | ||
| Value for money | — | — | ||
| Ease of use | — | — | ||
| ASEAN readiness | — | — | ||
| API quality | — | — | ||
| Pricing | Freemium | Free | Freemium | Free |
| Free tier | Free: Llama 3.1 8B, Claude Haiku, Qwen 3 14B, GLM 4.7 Flash; no account required | Fully free with Opera/Opera GX/Opera Mini; free account unlocks higher limits | — | Free with Edge browser; core AI features available without a Microsoft 365 subscription |
| Paid from | Leo Premium $14.99/mo ($149.99/yr) — Claude Sonnet 4.6, Opus 4.6, Kimi K2.5, DeepSeek | — | Dia Pro $20/month (uncapped AI usage/Skills) | Deeper grounding in personal/work data via Microsoft 365 Copilot ($30/user/mo) |
| Has API | ✗ | ✗ | ✗ | ✗ |
| Open source | ✗ | ✗ | ✗ | ✗ |
| Free to use | ✓ | ✓ | ✓ | ✓ |
| Users | — | — | — | — |
| Founded | 2023 | 1995 | 2024 | 1975 |
| Maker | — | Opera Limited | — | Microsoft Corporation |
| Verdict | Leo has the best-designed privacy story in mainstream browser AI: no account, no chat retention, third-party models proxied through AWS Bedrock with zero data retention, and — since April 2026 — a local Ocelot model that... |
Reach is the whole story here. Opera bakes this assistant into every one of its browsers — including the free GX gaming browser and the lightweight Mini — putting a no-cost AI sidebar in front of hundreds of millions of... |
Dia is the most thoughtfully designed of the current AI-browser wave: instead of bolting a chatbot onto a browser, it builds around tab-scoped memory and reusable "Skills," and pairs that with genuinely better privacy de... |
Of the big-tech browser assistants, this is the one that leans hardest into being part of the browser itself. In May 2026 Microsoft scrapped the separate 'Copilot Mode' toggle and folded its capabilities into Edge proper... |
| Full review → | Full review → | Full review → | Full review → |
Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.