
Lotus by Open Black Belt
Built for the Mat. Built for Business.
Lotus by Open Black Belt launched on June 15, 2026 with 4 votes, #3,322 of 22,647 launches that month and more than 75% of that year's launches.
What it does
Open Black Belt builds software for martial arts schools and fitness studios. Our suite of tools — starting with Lotus — helps dojos and gyms manage members, track belts, grow revenue, and run better businesses.
Open Black Belt makes software for martial arts schools and fitness studios. Tools that understand how you actually run a dojo — not just how a general gym operates. We're building a family of focused tools — each solving one part of the business of running a martial arts school or fitness studio. Everything you need to run your school in one place. Members, classes, attendance, belt testing, payments, email automation, and a member self-service portal. Run competitions from bracket to podium. Fight Card handles registration, bracket generation, weigh-ins, match scheduling, and results — built for martial arts tournaments of any size. Deep discussions on BJJ, Judo, MMA, Karate, Muay Thai,…from openblackbelt.com
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YansuMay 2026 · yansu.app · ▲338Hi HN Most teams run on a dozen SaaS tools and use maybe 20% of each. The rest is someone else's workflow that you're paying for. We built Yansu to fix that. It learns how you work — your desktop, your Slack, your Teams — and proactively builds bespoke tools tailored to you. You don’t need to prompt. It sees a pattern, builds a solution, and surfaces it for you to use or toss. Like, I do the same things before every call: look through Linkedin, see any open threads on email, read the latest blog/news of the company and any relevant slack conversations. Yansu noticed and built me an app…




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