YabOrion is Kagi’s browser for Mac, iPhone and iPad, on WebKit, the engine Safari uses, that also runs many Chrome and Firefox extensions. It has no telemetry and blocks ads by default.
Dia is the AI browser The Browser Company builds now instead of Arc. It is Chromium-based, for Macs with Apple silicon and, since October 2026, Windows, and its AI chats with your tabs and the tools you connect.
The short answer
- if you want Safari’s engine with Chrome and Firefox extensions, on Mac and iPhone
- if you want ads blocked and no telemetry from the start
- if you pay for Kagi Search
- if you want the current browser from Arc’s makers, with Arc import and tabs down the side as a setting
- if you want AI that chats across your tabs, Gmail, Slack and Notion, and will pay for it
- if you want a free browser with an ad blocker and no AI
- if you miss Arc and want spaces, pins and folders kept, on a Mac
- if you already pay for Claude or ChatGPT and want it to work in your signed-in tabs
At a glance
Orion and Dia, with Yab beside them for a Mac.
| What | Orion | Dia | Yab |
|---|---|---|---|
| Made by | Kagi | The Browser Company (Atlassian) | Serafim Korablev |
| Status | Updated | Updated | Updated |
| Runs on | Mac and iPhone | Mac and Windows | Mac |
| Phone app | iPhone and iPad; syncs tabs, bookmarks and passwords with your Mac through iCloud | None | Not yet |
| Price | Free; Orion+ supporter plan $5/month, $50/year or $150 once | Browser free; AI on Better Answers $20/month or Better Days $100/month | Free; its AI runs on your own Claude or ChatGPT plan |
| AI | Chat about pages, on its own AI service | Chat about pages, on its own AI service | An agent that works in pages, on your Claude or ChatGPT plan |
| Driven by outside agents | No | No | MCP and a command line |
| Engine | WebKit | Chromium | WebKit |
| Tabs down the side | A setting | A setting | Yes |
| Spaces | Yes | Yes | Yes |
| Split View | No | Yes | Yes |
| Extensions | Chrome and Firefox stores | Chrome Web Store | Chrome Web Store |
| Ad blocker | Built in | Built in | Built in |
| Open source | No | No | No |
Checked October 9, 2026 on each maker’s own pages, linked under Sources. Prices are per month, in US dollars.
Where they differ
What separates them, area by area. Where one plainly has more, it says who; where it comes down to taste, it says so.
AIa matter of taste
Both have AI to ask about pages, and neither does the clicking for you. Orion sums up pages and videos through Kagi’s Summarizer, with a paid Kagi plan; no chat and no agent. Dia chats with your tabs and the tools you connect, like Gmail, Slack and Notion, and drafts mail and invites; there is no documented agent that works through sites.
Tabs and windowsDia leads
Orion has tabs down the side as a setting, spaces, folders in the sidebar and tabs that sleep. Dia has tabs down the side as a setting, spaces, Split View, folders in the sidebar and tabs that sleep.
Priceeven
Orion: Free; Orion+ supporter plan $5/month, $50/year or $150 once. Dia: Browser free; AI on Better Answers $20/month or Better Days $100/month.
Where it runseven
Orion runs on Mac and iPhone. Dia runs on Mac and Windows. On a Mac, Orion needs macOS 10.14 or later and Dia needs macOS 14 or later. On the phone, Orion: iPhone and iPad; syncs tabs, bookmarks and passwords with your Mac through iCloud. Dia has no phone app.
Engine and extensionsa matter of taste
Orion is built on WebKit, the engine Safari uses; Dia on Chromium, as Chrome is. Orion takes extensions from both Chrome’s and Firefox’s stores, Dia from the Chrome Web Store.
Privacyeven
Both have an ad blocker built in. Orion has no telemetry, Kagi says; page summaries and translations go to Kagi’s servers. Dia’s chat goes through its servers to Anthropic, OpenAI and Google; chats and history stay on your Mac, and content sharing is on by default, kept 30 days.
What their pages don’t lead with
Real limits, from the makers’ own words and our own use.
Orion
- Apple only: the Windows and Linux versions stopped on October 2, 2026
- Not every extension works: support is partial
- No Split View of two tabs
- Closed source, and page summaries need a paid Kagi plan
Dia
- AI costs $20 or $100 a month for new users; the free plan has none after a 14-day trial
- On a Mac it needs Apple silicon and macOS 14 or later
- Its AI chats and drafts, but there is no documented agent that works through sites
- No MCP server or command line for outside agents
Yab, honestly
- Mac only: macOS 15.4 or later, no Windows, iPhone or Android
- New: first released in September 2026
- Its AI needs a Claude or ChatGPT plan; ChatGPT’s free plan may work with low limits
- WebKit, as in Safari: a site tested only in Chrome can misbehave
- Closed source
What changed lately
- October 6, 2026Dia: Dia 1.0 for Windows released
- October 2, 2026Orion: Kagi ended Orion for Linux and Windows to focus on Mac and iOS
- August 17, 2026Dia: Paid AI plans started rolling out to new Mac users
- June 23, 2026Orion: Orion 1.1 added per-tab containers and page translation
- November 25, 2025Orion: Orion 1.0 for Mac left beta
- October 21, 2025Dia: Atlassian completed its acquisition of The Browser Company
Questions
Is Orion free?
The browser is; its AI isn’t. Free; Orion+ supporter plan $5/month, $50/year or $150 once.
Is Dia free?
The browser is; its AI isn’t. Browser free; AI on Better Answers $20/month or Better Days $100/month.
Which has an AI agent, Orion or Dia?
Neither has an agent that does tasks in your pages. Orion sums up pages and videos through Kagi’s Summarizer, with a paid Kagi plan; no chat and no agent. Dia chats with your tabs and the tools you connect, like Gmail, Slack and Notion, and drafts mail and invites; there is no documented agent that works through sites.
Which runs on Windows, Orion or Dia?
Dia does. Orion runs on Mac and iPhone.
Do Orion and Dia have phone apps?
Orion does. On the phone, Orion: iPhone and iPad; syncs tabs, bookmarks and passwords with your Mac through iCloud. Dia has no phone app.
Is there a third option on a Mac?
Yab, Yet Another Browser, is free for the Mac: tabs down the side with spaces, folders and Split View, as in Orion; an agent that works in your signed-in tabs, on the Claude or ChatGPT plan you already pay for. Claude Code, Codex and any MCP client can drive it too. It runs on WebKit, the engine Safari uses, and takes Chrome extensions. It is Mac only, and new.
More comparisons
- Orion home page
- Kagi blog: Orion 1.0, 2025-11-25
- Kagi blog: An update on Orion for Linux and Windows, 2026-10-02
- Orion+ help page ($5/month, $50/year, $150 lifetime)
- Orion macOS release notes (1.1.3, 2026-09-28)
- Orion supported OS versions
- Orion update feed for macOS 10.14 (1.1.3, minimum 10.14.4)
- Orion Summarize Page
- Orion importing data
- Orion vertical tabs
- Orion tab groups
- Orion password management
- Orion ad and tracking blocking
- Orion respecting privacy (no telemetry)
- Orion Low Power Mode (suspends unused tabs)
- Orion FAQ (extensions, open source)
- Orion technical information (Web Extensions API support)
- Orion on the App Store (1.5.5)
- Orion feedback: split view request
- Kagi Help: Syncing Orion Data (tabs, bookmarks, reading list)
- Kagi Help: Troubleshooting syncing (iCloud Drive)
- Orion iOS/iPadOS release notes
- PiunikaWeb: Kagi says Orion for Android is ’not planned yet’ (2026-06-30)
- Dia plans and pricing FAQ
- Dia home page (macOS and Windows, ad and tracker blocking)
- Dia changelog (Chromium M155, Windows 1.0, tab sleep, sidebar or top tabs, AppleScript, memory retired)
- Dia release notes 1.52.0 (Oct 8, 2026)
- Dia download FAQ (import from Chrome, Safari, Edge, Arc)
- Dia security (AI providers, retention, local storage)
- MacRumors: Dia generally available, macOS 14 and Apple silicon
- PiunikaWeb: Dia $20 and $100 plans (Aug 18, 2026)
- Atlassian completes acquisition (Oct 21, 2025)
- Dia home page: ’Available for macOS and Windows’
- PiunikaWeb: Dia ’iPhone Tabs’ menu spotted, no public app (2026-08-25)
- Yab Manual: Bringing in from another browser
- Yab Manual: Connecting Claude or ChatGPT
- Yab Manual: Extensions
- Yab Manual: Yab’s tools over MCP
- Yab Manual: Privacy
Yab, Yet Another Browser.
Free for the Mac. Arc’s sidebar, your own Claude or ChatGPT as the agent, Chrome extensions on WebKit.