Been digging into some interesting growth plays lately, and I found a couple of stocks that could 10x your money if the thesis plays out over the next decade. The key is finding companies in industries that are expanding rapidly—that's where the real multibagger opportunities hide.

Let me break down two that have caught my attention.

First up is SoundHound AI. This stock has been all over the place volatility-wise, but it's up over 340% since the end of 2023, which is pretty wild. What's driving it? Their conversational voice technology powered by AI is hitting a moment where demand is actually accelerating. We're talking about voice ordering at restaurants and in-car services—massive markets where AI is fundamentally changing how people interact with these systems.

The numbers are compelling. Revenue more than doubled year-over-year in Q1, and that's after they acquired Amelia last year, which basically expanded their tech into customer service across retail and healthcare. More than 1,000 new restaurant locations went live with SoundHound in Q1—that's a 10-fold increase compared to a year prior. That kind of adoption rate tells you something about market demand.

Now, the elephant in the room is that they're not profitable yet. Q1 showed a non-GAAP loss of $22 million on $29 million in quarterly revenue. On the surface that looks rough, but honestly, at this stage of growth in an emerging market, I'm not losing sleep over it. Their revenue streams—product royalties, service subscriptions, and their music ID app ads—are structurally profitable over time. Plus, their balance sheet is solid: $246 million in cash, zero debt.

Here's what really matters though: this isn't off-the-shelf AI. Their tech is proprietary, built on 20 years of data from actual user interactions. That's a real moat. The AI voice generator market is projected to grow from $3 billion in 2024 to over $20 billion by 2030. SoundHound's current market cap is around $3.76 billion. For a 10x return, it needs to hit roughly $37.6 billion—and honestly, given the market growth trajectory and their current momentum, that's not unrealistic within a decade.

The second name I'm watching is Duolingo. Language learning is another sector getting supercharged by AI, and Duolingo is positioned perfectly. Started in 2012, now it's the top-grossing mobile learning app on both Google Play and the App Store. The stock has ripped 241% since going public in 2021.

What's working here is straightforward: they make learning languages actually fun, and people are downloading it in massive numbers. Q1 showed 130 million monthly active users, up 33% year-over-year. More importantly, daily engagement is strong—46.6 million daily actives, up 49% year-over-year. That's the kind of stickiness every app company dreams about.

Their business model is clean. Free download, then you pay for premium features. They've got over 10 million paying users generating $230 million in quarterly revenue, up 38% year-over-year, and they're actually profitable—$35 million in profit last quarter. That's the kind of growth + profitability combo that makes investors comfortable holding for the long haul.

The online language learning market is expected to grow at 21% annually through 2030, hitting $44 billion. But here's the thing—Duolingo is already growing revenue at 40%-plus, so they're outpacing the market. AI is going to be a catalyst here too. Their Max subscription service, which layers in AI-powered personalization, is one of their biggest growth opportunities.

What's really interesting is they're not stopping at languages. They're expanding into math, music, and just launched chess. That content diversification strategy means their long-term addressable market is way bigger than just language learning. Current market cap is $21.8 billion. For a 10x return to $210+ billion, they'd need to maintain roughly 25% annualized revenue growth and keep their valuation multiple steady. Given they're already growing 40%-plus, that's totally achievable.

So here's the thing about stocks that could 10x: you need three ingredients. One, a company in a rapidly expanding market. Two, real product-market fit showing through in the numbers. Three, runway left in the growth story—you can't be buying at peak maturity.

Both of these fit that profile. SoundHound's in an AI voice market that's exploding, with restaurant adoption accelerating. Duolingo's riding both the online learning wave and AI personalization trend, with content expansion still in early innings.

Now, are these guaranteed to 10x? Obviously not. But if you're looking for stocks that could 10x your money over the next 5-10 years, these are the types of companies worth researching deeper. The key is getting in early on real growth trends, not chasing hype after the move has already happened.

Worth keeping on your watchlist if you're thinking long-term growth.