Harmonizely
Appointment scheduling SaaS with deep CalDAV support and multi-calendar integration, a Calendly alternative built as a solo side project for 4 years.
Rafał Muszyński built Harmonizely as a side project while working full time, spending four years iterating and growing its user base. The tool stood out with native CalDAV support (Google Calendar, Outlook, iCloud, Zimbra, Zoho) where Calendly struggled. In June 2021, SimplyBook.me (a competitor in the scheduling space) acquired Harmonizely and rebranded it as SimplyMeet.me, integrating it into their suite of scheduling products. Terms were not disclosed.
Financial Data
Exit Analysis
This database tracks 362 SaaS exits, and the ones that disclosed a price sold at a median of $20,000. Category matters more than founders expect: buyers apply different discount rates to a content business, a mobile app and a B2B tool even at identical revenue.
From founding to sale took 4.0 years. Time to exit is a decent proxy for how built-to-sell a business was: shorter, cleaner processes usually mean documented operations and fewer surprises in due diligence.
See how this compares across the market on our market stats page, or browse more SaaS exits.
Exit Timeline
Tech Stack
Founder
Lessons Learned
Building a solid niche alternative to a dominant player (Calendly) as a side project for 4 years is a viable path to acquisition. The buyer was a strategic competitor wanting the user base and feature set, not a financial buyer hunting multiples.
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