Alt Fin & Co. started in Nosara, Costa Rica with one idea: surf fins shouldn't all look and feel the same. We built our shop around fins made by independent shapers and boutique brands from around the world — not just the big mass-production names you'll find everywhere else. Here's what that actually means for what's in stock.

Alt Fin & Co. teamed up with Sieve, a German fin maker, to build a twin-fin keel set out of recycled material instead of virgin fiberglass or carbon. The collab comes in two versions: a Recycled Carbon model and a Recycled Plastic model — same shape, same performance target, different waste stream turned into fin.

Something significant is happening at the edges of the surf industry, away from the trade show booths and the sponsored athlete feeds. In garages, small workshops, and purpose-built studios from California to the Basque Country to the Gold Coast of Australia, a growing wave of independent fin shapers is producing work that is challenging the dominance of the established fin industry in ways that would have seemed unlikely just a decade ago.

The Art and Science of Single Fin Size Selection for Midlength Surfboards

Five iconic surfboards. Ten prints each. One California artist who captured them like you've never seen before.

Alt Fin & Co. has always been about looking at surf culture differently. So it shouldn't be surprising that when the brand ventured into fine art, they did it with a technique as unconventional as the fins they sell — and the results are genuinely breathtaking.

If you've spent time scrolling through surf gear forums or hunting for something truly different to hang off your board, you may have already heard whispers about Alt Fin & Co. What started as a passion project born on the sun-drenched shores of Nosara, Costa Rica, has quietly evolved into one of the most intriguing online surf fin retailers in the world. Whether you're a seasoned charger hunting for a niche template or a weekend surfer curious about alternative fin designs, Alt Fin & Co. is building a reputation as the go-to destination for fins you simply won't find anywhere else.

Album Quad Fin Set

J Bay Designs modern keel design

Alt Fin and Company in Nosara: Riding the Waves by Day, Sipping Cocktails by Night

It all begins with an idea.