The most expensive moment in a sales cycle is the silence after a technical question. Aside, a seed-stage startup from Y Combinator's Fall 2025 batch, is betting the best way to prevent that stall is a copilot that lives in the browser, listens to the live call, and surfaces the right answer [Y Combinator, 2025].
A Wedge Through Browser Access
Aside's primary wedge is its method of access: it uses the browser's native permissions to tap into passwords, browsing history, and application context to automate tasks without requiring formal API integrations [Y Combinator, 2025]. This allows it to listen to sales calls, scan a rep's open documents, and reference past call transcripts in real time. The goal is to provide live suggestions and coach reps using custom playbooks like BANT or SPICED [Fondo, 2025]. The company positions this as a fundamental shift from the post-call analysis model popularized by tools like Gong [Aside, 2026].
The Team and the Initial Bet
All three co-founders, Jun Kim, Chanhee Lee, and Sanghun Lee, were founding engineers at Airbridge.io, a mobile attribution platform acquired by Ably in 2021 [Fondo, 2025]. Kim's background also includes work as a solutions consultant, where he directly supported over 50 sales reps [Y Combinator, 2026]. The company's initial backing is the standard Y Combinator seed investment [Y Combinator, 2025].
The Unproven Ground
Aside is operating in a crowded segment of enterprise SaaS. The company has not yet disclosed any named customers, deployment figures, or revenue metrics. Its public differentiation faces immediate scrutiny:
- The integration question. Enterprise security teams will want a detailed map of what data the browser extension can access.
- The real-time value. The product's success will hinge on the quality and timing of its suggestions, an AI inference problem that improves with vast amounts of customer call data.
- The competitive frame. Aside is entering a space where every major sales enablement platform is aggressively embedding AI.
The Target and the Terrain
Aside's ideal customer profile is a tech sales rep at a SaaS or software company who fields complex, technical questions. The company is aiming at the heart of the modern revenue organization. The next twelve months will be about moving from a YC demo to a handful of referenceable deployments that can validate the live-call value proposition.