The YC-backed browser can act across logged-in websites, giving Aside a larger test of its automation, memory and credential controls.
By [Ryan Merket](https://runtimewire.com/author/ryan-merket)
· Published
Primary source: [Aside on X](https://x.com/AsideAI/status/2099416863705055331)
Why it matters #
Windows expands Aside beyond its original Mac audience and puts its core claim under pressure: an agent can safely finish work inside a user's authenticated browser.
Jun Kim (@hyojun_at), Chanhee Lee (@hiddnest) and Sanghun Lee released a Windows version of Aside, their agentic browser, on September 14th, extending a product that had launched on macOS less than three months earlier.
https://x.com/AsideAI/status/2099416863705055331 Aside confirmed the Windows release in a post on X. The announcement was brief, and Aside did not attach technical specifications or a Windows-specific feature list. The core pitch remains the same: users give an AI agent work inside a browser where their accounts, files and browsing context are already available.
That puts the product in a more consequential environment. Windows gives Aside access to users who were excluded from its June 23rd launch, including many corporate workers whose browsers are tied to internal dashboards, Microsoft services and employer-managed credentials. It also forces Aside to prove that its product works outside the Mac-heavy early-adopter market where new productivity software often starts.
A browser became the integration layer
The founders arrived at Aside's current product after abandoning an AI sales assistant. Kim and Lee had worked as early engineers at mobile measurement platform Airbridge, and their first version of Aside listened to sales calls and retrieved answers from company documents and previous conversations.
Integrations became the constraint. Customers stored information across different tools, leaving Aside to build and maintain connectors for each one. Kim proposed using the browser itself as the common interface because the relevant services were already open there, Lee said in an August 10th interview with EO.
Aside joined Y Combinator's Fall 2025 batch with the sales product. By January 2026, its revenue had stalled and the founders committed to rebuilding it as a browser. Lee said five people spent five months on the new product, with Kim handling the agent system and memory, Sanghun Lee working on the Chromium fork and Chanhee Lee leading design.
The resulting browser launched on June 23rd. Lee told EO that it reached 20,000 users within two weeks and generated more revenue in its first month than the sales product had produced over a year. Those figures are the founders' account and Aside has not published the underlying revenue amount or retention data.
Windows is the first large distribution test since that initial launch burst. A product built around persistent browser context becomes more valuable as it reaches a user's primary computer, yet each additional operating system also creates another surface for browser imports, credential storage, filesystem permissions and updates.
Aside wants the agent inside the authenticated session
Aside's approach differs from automation products that depend on APIs or prebuilt connectors. Its agent operates websites through the browser, including pages where the user is already signed in. Aside says it can open pages, fill forms, download files and work with local documents and spreadsheets.
The browser also turns browsing history and completed tasks into editable local memory. Aside says this allows the agent to recover details such as which internal tool a person uses or which page previously worked for a particular process.
Authentication is central to the design. Aside includes a password manager that can autofill credentials without placing the password itself in the model's context. Credential access can be limited by site and is recorded in an audit log, according to Aside. Messages, payments and other sensitive actions are supposed to wait for user approval.
Those controls carry much of the product's risk. Aside's own terms of service warn that webpages, emails and documents may contain instructions designed to manipulate an AI system, and that its safeguards may fail to catch every prompt-injection attempt. A browser agent can reach the same accounts as its user, so a mistaken click or malicious page can have consequences beyond an inaccurate chat response.
Aside sells a free plan with 500 monthly credits and three automated routines. Its Pro plan costs $20 per month and adds longer research, additional usage and unlimited routines. A $200-per-month Max tier offers higher usage and early access, while Aside also sells an enterprise version for shared accounts and centrally managed permissions. Aside has published results from three browser-agent tests and says it leads competing systems on those benchmarks. Its public benchmark repository includes task-level results and configurations, although the runs and automated grading were organized by Aside. On Online-Mind2Web, its published run completed 297 of 300 tasks, with one task classified as impossible.
The Windows release shifts attention from benchmark scores to ordinary work. Aside now has to import the browser state of Windows users, preserve their credentials, survive the irregular pages inside corporate software and finish tasks reliably enough that users allow it to keep acting. Chrome's installed base gives Aside a much larger pool of potential converts. It also supplies many more ways for the agent to break.