Calendly is a meeting scheduling software that automates the process of coordinating meetings between users and their contacts.
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Can I reverse engineer Calendly?
An original rebuild of a Calendly-style MVP is rated 4/5 (complex) and would take an estimated 12–16 weeks. Hardest engineering problem: Implementing a robust and scalable scheduling engine that handles time zone conversions, availability matching, and integration with various calendar services is the most challenging aspect. Open-source projects such as OpenCollective, FairlyLocal, IndieKit are a practical starting point.
◈ How you might build it
Start with the smallest useful workflow: authentication, a focused productivity experience, and persistent user data. Layer on collaboration, integrations, background processing, and production reliability as the product grows. The stack below is a suggested approach, not a verified description of Calendly's internals.
⌘ Suggested building blocks
⚑ The hardest part
↗ Open-source projects to explore
Project names are starting points, not endorsements or claims of feature parity. Check licenses before reuse.