GTM Sauce

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

Why BoldVoice Charged From Day 1 and Ignored the Duolingo Freemium Playbook — Anada Lakra

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David BarnardSuch great advice. Gosh, there's so many things I want to talk about. We don't have a ton of time left, but maybe we can speed run some of the virality and growth things y'all have done because you've gotten some really cool growth wins and some viral moments and things like that. What would you say were the maybe top three most impactful lessons on the growth side or top three viral moments?

Anada LakraWell, for sure the top one was the Accent Oracle that we built. 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. And so we built and trained a model in-house to do exactly that. So I think this also speaks to ... Again, a really important part of our success is that we have an audio ML team in-house building these and training these really differentiated models from scratch with our own data. And we also have the expert speech coaches who are a huge part of how we label, transcribe and just train these models to be better. So that's a really big differentiation in our product. And the Accent Oracle was built based on one of those in-house created models, and it worked. It was the most magical thing I think we've done.

Anada LakraAnd the best part about it is that the way that it spread is that ... Every month I write the investor updates. I've been doing it for five years. That month that the Accent Oracle was built, I sent it out. I think even the day after or so, to our investors. One of them was an angel investor, it was Korean, and he was like, "Oh, this is cool. I'll put in on Threads." And he posted it on Threads, and then I believe the next day we had a 100,000 people in Korea try this thing. It's again, wild and unlike anything we've seen before.

Anada LakraSo of course, when that happened, we're like, "Let's make this better. Let's invest a lot of time in making the model more accurate, making sure it doesn't crash." And all these things. And it was a really wonderful way to get people familiar with the product, and we made it ... There was no gate, there was no free trial. It was a pretty magical experience. You don't even have to download the app, by the way. 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.

Anada LakraSo it was optimized for this frictionless viral moment that then exposes people to BoldVoice as a brand and then invites them into the app to continue discovering more things about their speech and then actually improving and working on their pronunciation and speech as well.

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Tags: web, threads, free-tool, viral-tool, accent-oracle, no-download, investor-update, in-house-ml