The Macro: Voice Messages Are Exploding and Nobody Is Building for It
Voice messages are having a moment. WhatsApp processes billions of voice messages daily. iMessage voice messages have become the default communication mode for an entire generation. Telegram voice notes are wildly popular in markets outside the US. The behavior is real and growing.
But the experience is terrible. Voice messages in every major messaging app are an afterthought. You get a tiny waveform bar. You cannot search them. You cannot skim them. You cannot easily reference something someone said three voice messages ago. The technology treats voice as a blob of audio data rather than as rich, searchable, actionable content.
This feels like an obvious gap. AI transcription is cheap and accurate now. Natural language processing can extract topics, action items, and key moments from audio. There is no technical reason why voice messages should still feel like cassette tapes in a digital world.
The bear case is that messaging is a winner-take-all market and no new entrant can break through. iMessage, WhatsApp, and Telegram have network effects that make switching costs enormous. That is a real concern. But history shows that new communication products can win when they nail a specific interaction model that existing products handle poorly. Slack won against email for team communication. Discord won against Skype for gaming communities. There may be room for a product that wins voice-first communication.
The Micro: A Harvard Builder Going AI-Native
Sam Kaplan is the founder. He graduated from Harvard, previously worked at Brex, and has been building apps since middle school. Resonate is part of YC Winter 2026 working with Jared Friedman.
The company is working on two products. Resonate Chat at resonate.audio is a voice messaging platform currently in private beta on iOS. Resonate Create at resonatecreate.com is an agentic video platform. The broader vision involves information transformation, generative social content, and generative UI.
Right now, the product is early. The landing page is minimal. There is an App Store link and an email signup for updates. “Building publicly” is the approach, which can work for consumer products that benefit from early community involvement.
I think the multi-product approach this early is risky. Consumer products usually win by being the absolute best at one specific thing. Trying to build a voice messaging app and an agentic video platform simultaneously, as a solo founder, is a lot. The focus question is going to matter here.
The Verdict
Resonate is chasing a real insight. Voice messaging is underserved by current products, and AI makes it possible to build a fundamentally better experience. If they can make voice messages searchable, skimmable, and actionable, that is genuinely useful.
The challenge is distribution. Consumer messaging apps need network effects to survive. Your app is only useful if the people you want to talk to are also on it. Breaking through that chicken-and-egg problem has killed hundreds of messaging startups. Telegram took years and massive marketing budgets. Signal needed a global privacy scare to get mainstream adoption.
In 30 days, I want to see the private beta numbers. How many daily active users? What is the average messages-per-user-per-day? In 60 days, the question is whether there is any organic growth. Are users inviting friends? In 90 days, I want to see whether Resonate Chat or Resonate Create is the real product. Trying to build both simultaneously is a risk, and one of them needs to emerge as the winner soon.