A look at startups aiming to build better digital calendars, with faster ways to create meetings, optimizing schedules, analytics for corporate calendars, more
David Pierce / Protocol : Tweets: @protocol , @pierce , and @protocol Tweets: @protocol : Right now, calendars are based on old, outdated technology. They're like SMS. So a bunch of companies are vying to be the WhatsApp or WeChat of the space, to build a new standard that does more and works better. https://www.protocol.com/... David Pierce / @pierce : This story started with an argument: is it rude to send someone your Calendly link? It turned into a whole thing on why digital calendars suck, why they're so important, and what it'll take to fix it https://www.protocol.com/... @protocol : Nobody likes digital calendars, but they're hard to improve, and even harder to change entirely. That hasn't stopped a lot of companies from trying. https://www.protocol.com/...
Context & Ripple Effects
David Pierce's argument-starter — that calendars are stuck on technology as dated as SMS and need their own WhatsApp moment — turned out to be an early map of a funding wave. Within two years the survey's subjects had capital behind them: Clockwise, which uses AI to carve focus time out of shared calendars, raised its Series A co-led by Greylock and Accel, and Calendly's $350M round at a $3B+ valuation made scheduling-links alone a unicorn-category business.
The piece also frames what 'better' means: faster meeting creation, optimized schedules, and analytics on how organizations actually spend their time. That framing held — Clockwise's AI-driven schedule optimization pursued the second goal, while Cal.com's open-source push with an app store and public API treated the calendar as a platform to build on rather than a grid to fill.
First-order effects
- Scheduling shifts from a feature buried in email suites to a funded standalone category: Calendly, Clockwise, and Cal.com each now compete on speed of meeting creation and smarter use of existing calendar data.
Second-order effects
- Open-source challengers like Cal.com force incumbents to compete on extensibility — APIs and app stores — rather than convenience alone, while adjacent relationship-tooling such as the personal CRM startups shows buyers paying for software that manages human time and contact the way sales teams manage leads.
Third-order effects
- If the pattern holds, the calendar standard itself gets contested: whichever startup owns the scheduling layer captures the analytics and workflow built on top, much as messaging apps displaced SMS by owning both transport and features.
The trend: Legacy productivity primitives — the calendar among them — are being rebuilt as venture-backed platforms, with open protocols and AI optimization replacing static grids.