Some of the best investment opportunities are not always the most talked about.
While large-cap names tend to dominate headlines, there are a number of ASX shares quietly building strong growth platforms behind the scenes. For investors willing to look beyond the obvious, these companies can offer compelling long-term potential.
Here are two under-the-radar ASX shares that could be worth considering.

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Breville Group Ltd (ASX: BRG)
The first ASX share that could have significant long-term potential is Breville.
At first glance, Breville might look like a traditional appliance business. But underneath the surface, it is evolving into a global premium consumer brand with multiple growth levers.
The company continues to expand internationally, with newer markets such as China, Korea, the Middle East, and Mexico delivering very strong growth. In fact, these newer regions collectively grew more than 50% during the first half, highlighting the early-stage opportunity still ahead.
At the same time, Breville is benefiting from strong demand in its coffee category, which continues to drive growth globally. Its focus on premium products and innovation allows it to maintain pricing power and brand strength.
Another interesting angle is its investment in artificial intelligence. Management is rolling out AI across the entire business, not just as a small initiative but as a company-wide transformation.
Combined with ongoing product development and geographic expansion, this suggests Breville has more to it than a typical consumer discretionary company.
SiteMinder Ltd (ASX: SDR)
Another under-the-radar ASX share with plenty of potential is SiteMinder.
SiteMinder operates a global hotel distribution and revenue platform, sitting at the centre of how accommodation providers manage bookings, pricing, and distribution.
What makes it particularly interesting is its combination of strong growth and improving profitability. The company recently delivered revenue growth of over 25% alongside a significant improvement in earnings, with EBITDA more than doubling.
Its Smart Platform strategy is a key driver here. By expanding its product offering and increasing adoption among customers, SiteMinder is growing both its customer base and the amount it earns per customer.
This is reflected in its rising annual recurring revenue and improving unit economics, which point to a scalable business model with operating leverage.
There is also a strong structural tailwind from the increasing complexity of hotel distribution and pricing, particularly as artificial intelligence becomes more widely adopted across the travel industry. SiteMinder's platform plays a critical role in executing transactions and managing this complexity, positioning it well for long-term growth.