Arc isn't technically dead — it still installs, runs and gets security patches — but The Browser Company stopped building it in mid-2025, pivoted to an AI browser called Dia, and was acquired by [Atlassian](/entry/linear-vs-jira-vs-clickup-which-project-tracker-is-cheapest-at-10-seats). Arc will never get new features. If you built your workflow around its Spaces and sidebar, you need a plan.
| Cost | What it is | |
|---|---|---|
| Dia | free (beta) | The Browser Company's AI-first successor — macOS Apple-silicon only, Windows "fall 2026" |
| Zen Browser | free, open source | the closest full Arc clone — Firefox-based, Spaces, split view, sidebar |
| Vivaldi | free | Workspaces, tab stacking, tab tiling, web panels — Chromium, extension support |
| Brave / Chrome / Edge | free | the mainstream fallbacks |
Dia is the official successor, but it's a different product — AI-first, focused on summarizing pages, automating tasks, and building "agents" that act for you. It's macOS-on-[Apple](/entry/bear-vs-upnote-vs-apple-notes-the-lightweight-note-app-priced)-silicon only right now, with Windows promised for fall 2026. If you liked Arc for the AI direction, Dia is where that team went.
Zen is what to install if you liked Arc for the interface — it's the closest clone, Firefox-based, free and open source, with Spaces, split view and the collapsible sidebar. This is the recommendation for most Arc refugees.
Vivaldi is the maximalist option: Workspaces, tab stacking and tiling, built-in web panels, Quick Commands, all on Chromium with full extension support. More configuration than Arc, but more power.
Missing Arc's look and workflow: Zen Browser. Want the AI-first direction the Arc team is now pursuing: Dia (if you're on an Apple-silicon Mac). Want maximum tab-management power: Vivaldi. Just want something that works and stays supported: Chrome, Edge or Brave.