Podcastle is an AI-powered content creation platform that began in 2020 as a Chrome extension converting articles into podcasts and grew into a full studio for recording, editing, transcribing and publishing audio and video. In January 2026 the company rebranded as Async (async.com), reflecting an expansion beyond podcasting into a unified, agentic AI platform spanning audio, video, voice and code-enabled workflows.
Under the Async brand, the product is marketed as an all-in-one AI creative studio where users can create and edit video and audio by chatting with AI. Capabilities include an online AI video and audio editor, AI video and music generation, a studio-quality recorder for podcasts and video, multilingual AI dubbing and subtitles with over 1,000 voices across many languages, three-second voice cloning, one-click viral-clip generation for TikTok, Reels and Shorts, and a brand kit for consistency. A developer-facing Voice API extends the same technology to software teams.
It serves content creators, podcasters and video storytellers, as well as sales, marketing, communications and HR teams, plus developers building voice features. The company emphasizes that no prior editing experience is required.
Podcastle/Async has raised about $23.5M in total, including a $13.5M Series A in 2024, backed by investors such as Andrew Ng's AI Fund, Mosaic Ventures, RTP Global, Point Nine and Sierra Ventures. It offers a Creative tier from around $11.99/month, an Enterprise tier from around $49.99/month, and developer API pricing from about $0.50/hour, positioning itself as an accessible alternative to assembling separate recording, editing, voice and clipping tools.