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Thais Sideris is a fitness-minded creator and athlete based in Orlando, blending weight lifting, jiu jitsu, and marathon training with a polished beauty-and-fashion aesthetic. She’s a strong fit for brands looking for an authentic female athlete who can naturally showcase activewear, beauty, hair, wellness, and lifestyle products to an engaged audience.
I’m an enthusiastic person who loves sports and at the same time I love to going out with friends. I love promoting things that I believed and makes difference in people’s life 👏🏻
Jiu Jitsu, Marathon Running
University of Central Florida (UCF)
Brazil
New to athlete partnerships? See how sports sponsorship works on OpenSponsorship.
1 post & 1 story with the Thais Sideris promoting your product.
Long-term deal involving appearances, photoshoots, social media and more.
Have Thais Sideris make a live appearance at your next event
Brands can sponsor Thais Sideris on OpenSponsorship by creating a free account, browsing Thais Sideris's profile, and sending a sponsorship proposal for social posts, appearances, or integrated campaigns. OpenSponsorship handles messaging, deliverables, and deal terms in one platform so you can connect directly with this athlete.
Thais Sideris is listed on OpenSponsorship and available for brand sponsorships. Brands can review campaign packages, audience details, and pricing on this profile, then submit a proposal to start a partnership with this athlete.
According to OpenSponsorship, estimated pricing to sponsor Thais Sideris starts at $840 for a social media post, $1,440 for a appearance and $1,800 for a brand ambassador campaign. Final rates depend on deliverables, usage rights, and campaign scope. Sign up on OpenSponsorship to view packages and send a proposal.
According to OpenSponsorship, Thais Sideris's audience includes 9K+ Instagram followers, interests including Fashion, Activewear, Health & Wellness, Beauty, Fashion, and more, based in Orlando, Florida, United States. Brands can use this profile to evaluate reach, content niche, and sponsorship fit before sending a proposal.

How do you measure influencer marketing ROI when half the numbers social media gives you are vanity metrics? It is the question brands ask us most, and it came up again when I joined Massimo Marinelli on the Berkida Ventures Podcast. After more than ten years and thousands of brand deals with athletes and creators at OpenSponsorship, here is how we think about it, and the framework we use with our clients.
October 28, 2026