scheduling-software
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The Calendar Company That Closed Its Code
Cal.com began as the answer to an awkward search: “Calendly open source.” Five years later, its hosted product went private while a separate scheduling engine stayed public. The split tells a larger story about what a booking link becomes when it must run a business.
Belfry
Belfry is a New York-based vertical SaaS company building the all-in-one operating system for physical security guard companies. Its platform unifies scheduling, timekeeping, GPS-tracked field operations, embedded payroll with tax filing, and automated billing - replacing the spreadsheets and stitched-together tools that security firms historically relied on. Founded in 2022 by Jordan Wallach and Alex Tulenko, Belfry serves hundreds of security businesses and raised a $12M Series A in January 2025 led by Base10 Partners.