The Browser Company Will Sunset Arc and Shift Focus to Dia

The Browser Company announced on October 22, 2026 that it will sunset its Arc browser on December 22, 2026, ending new Arc account creation effective immediately and directing members to Dia, the AI-focused browser that will carry the company’s engineering and security focus going forward.

In a farewell post on Arc’s website, the company said Arc for macOS and Windows will stop working on the shutdown date, members will no longer be able to sign in to their Arc accounts, and it will deactivate all Arc accounts and turn off all Arc services. Once an account is deactivated, personal data related to the account is deleted within 30 days. After December 22, 2026, the company will no longer be able to identify or retrieve Arc user data for data requests, and members will not be able to open Arc to reach Spaces, tabs, or browsing data stored locally on their devices.

The Sunset Timeline

According to the company’s key-dates help article, as of October 22, 2026 new Arc accounts can no longer be created, while existing members are unaffected for now. The latest version of Arc adds an option to export all data out of the browser and a smoother import into Dia.

On November 23, 2026, Browse for Me and other AI features will be disabled in Arc Search on iOS and Android, and the apps will no longer allow members to sign in or sync tabs with Arc, though both will keep working as browsers. Arc for macOS and Windows will start showing reminders about the sunset on that date.

December 15, 2026 is the last day members can request a copy of personal data related to an Arc account, or ask the company to delete it. The company said a copy covers account details such as a member’s name, email address, and join date, plus a record of how the member used Arc. It does not include browsing data stored on the device, such as history or passwords, because the company does not have access to that data.

Until December 22, 2026, Arc for macOS and Windows will keep receiving its usual basic updates and fixes, but the company is no longer adding new features. During the sunset, the company said it will investigate only larger problems affecting many members, such as Arc crashing or failing to open, and will no longer fix smaller bugs or accept feedback or feature requests. On December 22, Arc Search for Android will be removed from the Google Play Store and from the devices it is installed on, while Arc Search for iOS will continue to work as a mobile browser.

The Company’s Security Rationale

The Browser Company said keeping a browser secure takes constant, dedicated work that is only increasing in the age of AI, and that it can no longer keep Arc as safe and secure as it needs to be. The company said Dia was built from the ground up to meet current security standards and protect against modern-day security attacks, and that its engineering and security teams will focus on Dia moving forward. The company also said Dia now surpasses Arc benchmarks in stability, speed, and security, and that the browser features Arc members use are free in Dia, with AI optional.

Arc’s Maintenance-Only Wind-Down

The shutdown follows a wind-down the company had described to members earlier. In a May 26, 2025 letter to Arc members published on its Keeping Tabs newsletter, The Browser Company said it was no longer actively developing Arc’s core product experience while continuing regular Chromium upgrades and security fixes, and wrote at the time that it was “not trying to shut Arc down.”

That letter reported that only 5.52% of Arc daily active users regularly used more than one Space, 4.17% used Live Folders, and 0.4% used Calendar Preview on Hover, while Dia’s chat-with-tabs and personalization features were used by 40% and 37% of daily active users, respectively. The letter also said the company had grown its security engineering team from one to five, and explained that Arc could not meaningfully be open-sourced because it runs on a custom Arc Development Kit that also serves as the foundation of Dia.

The company’s official Arc for Windows release notes document the maintenance cadence that followed, with version 1.129.0, released October 22, 2026, moving Arc to Chromium 156.0.8078.48 with security repairs and no other changes. The same record dates Arc for Windows 1.0 to April 30, 2024, the launch of the Arc Max AI feature suite, including Tidy Tabs and Ask on Page, to July 11, 2024, and Arc Search for Android’s exit from beta to November 14, 2024.

Moving Data Into Dia or Out of Arc

Dia’s import brings passwords, bookmarks, extensions, and history over from Arc, with Spaces carrying over as Profiles, Folders as Tab Groups, and Pinned Tabs and Favorites keeping their custom names, on both macOS and Windows. Members can import from Arc during Dia’s setup by selecting Arc, or later through Dia > Import from Another Browser on macOS or the Dia app menu on Windows, at any time before December 22, 2026. Dia is a free download for macOS and Windows at diabrowser.com.

Members who do not plan to move can save their tabs as a list of links before December 22, 2026: on macOS through Arc > Settings > Advanced > Export Data, on Windows through the Advanced section’s Export Spaces and tabs option, and on iOS and Android through each app’s settings export option. The company also provides fresh installers of Arc for macOS and Windows for members who need to reopen the app to export their data, and said its team remains reachable through the Arc Help Center chat until December 22, 2026.