Async is an AI-native video, audio and voice platform aimed at creators, businesses and developers who want to produce, edit and repurpose content using conversational AI. The product line spans an AI video editor, remote recording studio, subtitle and dubbing tools, short-clip generation, an AI Voices Hub for real-time text-to-speech, and a Voice API for building conversational AI agents.
The core differentiator is an agentic production workflow: rather than dragging assets across a manual timeline, creators describe what they want and the system handles editing, cleanup, subtitles, dubbing and packaging. Async claims this approach can compress post-production for a one-hour recording from 20–48 hours into minutes.
Async was founded by Arto Yeritsyan and is the rebranded successor to Podcastle, a podcast-focused tool the team originally launched before expanding into AI video and a broader content production stack. The company has built one of the larger creator-facing AI audio user bases through its podcast heritage.
The company has raised approximately $23.5 million in total funding, including a $13.5 million Series A in 2024 with backing from Andrew Ng's AI Fund, Mosaic Ventures, RTP Global, Point Nine and Sierra Ventures. The funding has been used to scale the AI content creation platform and ship the new agentic workflow.
Async differentiates from tools such as Descript, Captions and Opus Clip by combining a unified video, audio and voice stack under a single chat-based interface and by offering a developer-facing Voice API. The platform also runs an ambassador program aimed at building a creator advocacy network around the new AI-first workflow.