Inside Handigraphs’ fast-growing baseball data platform and what’s next

Like many other betting tools on the market, when Adam Rosenberg launched Handigraphs with co-founder CJ Buskey this summer, it wasn’t meant to be a business. The suite of tools for baseball handicapping was a side project between two bettors that wanted to make the data less intimidating. “We wanted to make a website that made it easier for people to bet on a sport that would be very intimidating to them and know what data’s good and what data’s bad,” Rosenberg said on The BettingStartups Podcast. “On Handigraphs, you go in and blue is bad and red is good.”

That simple UX insight, color-coding good and bad data, helped Handigraphs carve out a loyal niche in a crowded field of betting tools. Built initially for baseball, the platform aggregates advanced metrics into one customizable, export-ready interface, helping users analyze props like strikeouts, home runs, and team totals. But its biggest differentiator is what Rosenberg calls the 30/60/90 split: plate-appearance tracking that reveals how hitters perform over specific time frames and against pitcher handedness. “We really made our own proprietary metric,” he explained. “And it ended up proving that it gave a legitimate edge when it came to sports betting.”

Since debuting in July, Handigraphs has signed up roughly 250 paying users and generated more than half a million pageviews—numbers that might sound modest until you consider its “zero churn” and word-of-mouth growth. The founders intentionally gave away the product for the first three months to gather feedback before launching at $10 a month. “We made it priced wise enough that you could win the amount that it costs for the month if you’re using it correctly within three days,” Rosenberg said.

Early on, many users told him they loved the data but didn’t know how to use it. Rosenberg says he went hands-on with user education to retain them. “You really need to hold people’s hands out of the gate as new users,” he said. “If a user has a really good experience in their first two weeks with a product, they’re with you forever.” He spent nights producing tutorial videos and creating a ‘Learn’ section that links each stat to its corresponding betting market. Users responded by building and sharing their own filters, which helped create a small-yet-vibrant community of self-taught analysts.

Today, the product remains a side project—Buskey is a Salesforce engineer, and Rosenberg still runs his own PR consultancy—but it’s evolving quickly. Hockey support is next, followed by tennis and golf. “We’re between proof of concept and alpha phase right now,” Rosenberg said. “Next baseball season’s going to be pretty key for us.”

For a company that began as a spreadsheet shared in a Discord server, Handigraphs now represents something larger: the shift toward accessible, transparent analytics tools that help everyday fans think like pros. As Rosenberg put it, “I was able to help people tell their story—and then develop my own product story with it, which is really neat.”