BoldVoice · B2C · accent coaching app
Build a free web tool that guesses where you're from after 10 seconds of speech
~100K people in Korea tried it the day after one investor posted it
Workedproduct-viralityweb-to-apppartnerships
What they did
Trained an in-house model that predicts a speaker's origin from ~10 seconds of speech and launched it as a separate web app (accentoracle.com): no download, no gate, no trial; record your voice and get results instantly, then get invited into the BoldVoice app. Shared it in the monthly investor update; a Korean angel investor posted it on Threads. After it spread, invested in accuracy and stability.
What happened
~100,000 people in Korea tried it the next day; keeps evergreen use with random viral spikes. Guest calls it the top growth driver and 'the most magical thing' they've done.
- Stage
- scale
In their words
Sub Club by RevenueCat · Why BoldVoice Charged From Day 1 and Ignored the Duolingo Freemium Playbook — Anada Lakra“Our team had this idea that if we could build a tool that could predict where a person was from just based on 10 seconds of them speaking, it could have this kind of viral potential.”
“My co-founder actually made this decision to just put this in a separate web app, where you just go to accentoracle.com. You just record your voice, instantly it spits out your feedback or your results.”
“he posted it on Threads, and then I believe the next day we had a 100,000 people in Korea try this thing”
Related topics
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More from this episode
- BoldVoice: Charge $10 a month with a 7-day free trial from launch dayFounder says it filtered out non-buyers and freed time for the product; no numbers
- BoldVoice: Judge paywall tests on revenue after refunds, waiting 3+ weeks past trial startCaught two trial-start 'wins' that lost money once refunds came in
- BoldVoice: Remove the close button so users must start a trial to continueTrial starts rose, but refunds rose by more; net loss
- BoldVoice: When users close the paywall, show a discount trial they can't closeTrial starts rose, but refunds rose by more; net loss
- BoldVoice: Let people who close the paywall use day one free, then ask for a trialFounder calls it a good middle ground; no numbers
- BoldVoice: Show the ~$150 annual plan first so ad spend pays back when trials endCash lands 7 days after install, so each channel's ROI is known at once; no numbers
- BoldVoice: Market to international college students firstWeak fit: lower willingness to pay and less urgency; moved to professionals
- BoldVoice: Sell to working professionals with good English, and skip beginners entirelyFounder credits this focus for ~$10M ARR; no split by segment
- BoldVoice: Auto-invite users to 15-minute calls booked with whoever on the team is freeEvery employee, engineers included, does 2+ user calls a week
- BoldVoice: Have engineers demo unreleased features to power users on weekly callsFounder says it validates complex features before shipping; no numbers
- BoldVoice: Ask unhappy users three questions by email they can answer by replyingOffsets the happy-user bias in interviews; no numbers
- BoldVoice: Add city-level results to the free accent tool to spark a new viral waveProduced another viral boost; no numbers
- BoldVoice: Show a sample of the full in-app results to push web users to the appFounder says it boosts web-to-app conversion; no numbers
- BoldVoice: Ride a TikTok trend of people crying over their low app scoresOne creator got ~300M views in a few months, no ads; lower intent than paid
- BoldVoice: Grow from accent training into overall spoken-English fluency after raising a Series A
- BoldVoice: Hire self-driven founder types and hold just one team meeting a week, on Mondays~$10M ARR with 10 people; founder credits hiring first
- BoldVoice: Get everyone, even the non-technical CEO, shipping code with ClaudeRoughly doubled team productivity, per the founder; her biggest win of the year
- BoldVoice: Recruit a Hollywood accent coach and run a manual email pilot with 12 usersLed to a ~$500K term sheet and YC; the coach still works with them
- Show a countdown of free scans left before the paywall appears