Calendly

United States · owned by Independent (United States) · calendly.com · 27 vendors

Calendly is a scheduling automation platform that simplifies the process of booking meetings and appointments for individuals, small businesses, and enterprise companies. Founded by Tope Awotona in 2013, it serves over 20 million users across more than 230 countries and integrates with a wide range of calendars, CRMs, video conferencing tools, and other business software. The platform helps teams accelerate revenue, improve client relationships, and streamline workflows by eliminating the back-and-forth of scheduling.

Resilience scores

Disruption prediction

Calendly has an estimated 11% probability of disruption in the next 6 months.

16 of Calendly's 27 vendors monitored for disruptions.

Technology vendors

Services catalogue

6 services in catalogue across 4 categories; runs on 27 sub-vendors.

Insights

Last updated 2026-07-30 · revision 7

27 direct vendors, 330 subvendors

Direct vendors by controlling owner country (sample)

Subvendors by controlling owner country (sample)

Migration Readiness: 9/10

Assessed by AI based on technology stack characteristics (cloud-native vs legacy, containerization, microservices), regulatory environment, data residency requirements, financial stability, and vendor lock-in risks. The score ranges from 0-10, where higher scores indicate better readiness for technology migration.

Calendly exhibits very high migration readiness, scoring 92. Its internal tech stack is highly modern, cloud-native, and built on principles that facilitate easy migration and re-platforming. The use of AWS, Kubernetes for container orchestration, Docker, and Terraform for infrastructure-as-code signifies a microservices-oriented architecture that is inherently portable and flexible. This allows for seamless transitions to different cloud environments or regions if required. Financially, Calendly's strong and consistent revenue growth provides ample resources to fund any significant migration initiatives. From a regulatory perspective, the company's existing robust compliance framework, including GDPR, SOC 2, ISO 27001, CCPA, and PCI DSS, means that data protection, security, and privacy considerations are well-established, simplifying compliance in new environments. The company's 'global data processing model with appropriate legal safeguards' rather than strict region-specific data residency requirements also offers significant flexibility for data relocation. Regarding vendor lock-in, despite the 'Vendor Lock-in Risk: Unknown' and the inconsistent 'Total Vendors: 0' data, the use of open-source technologies (Kubernetes, Docker, Kafka, PostgreSQL, Redis) and the implied diversity of vendors for its 29 services across 4 HQ countries suggest a low risk of vendor lock-in. This allows for greater agility in selecting and integrating new services or platforms during a migration. The only minor potential challenge is the 'ISAE 3000: Assessment Required' status, which might need to be addressed for specific client requirements during a migration process.

Compliance

6 in-scope frameworks identified; showing 3.

PCI DSS (source) — Compliant

Calendly achieves PCI compliance through their payment processor Chargebee, which handles credit card data encryption and storage. This approach reduces direct PCI compliance burden while maintaining security standards for payment processing.

Evidence: https://calendly.com/security

SOC 2 (source) — Compliant

Calendly has achieved SOC 2 Type 2 certification, which demonstrates strong internal controls for security, availability, and confidentiality. This significantly reduces compliance risk as they have undergone independent third-party audits and maintain ongoing compliance monitoring.

Evidence: https://calendly.com/security

GDPR (source) — Compliant

Calendly explicitly states GDPR compliance on their security page and has implemented data protection measures. However, as a US-based company processing EU personal data, they face ongoing compliance obligations and potential enforcement actions. The risk is medium due to the company's proactive compliance stance but the inherent complexity of cross-border data transfers.

Evidence: https://calendly.com/security, https://calendly.com/legal

Financials

Three-year financials

Financial Resilience Score: 7/10

Calendly demonstrates solid financial resilience as a well-capitalized, product-led SaaS company. It raised US$350M in Series B funding in January 2021 at a ~US$3B post-money valuation from OpenView and Iconiq Growth, and the founder has publicly stated the company was bootstrapped to profitability before taking outside capital. The freemium funnel drives low customer acquisition costs, with 20M+ users and 100K+ paying organizations, including 86% of the Fortune 500. Enterprise momentum is strong, with +61% YoY enterprise growth and +400% YoY growth in customers spending over $50K in 2023. However, the company faces meaningful structural risks. Microsoft (Bookings/FindTime) and Google (Appointment Schedules) bundle native scheduling free into their productivity suites, threatening Calendly's single-product positioning. The company's 2024-2025 expansion into Notetaker, Routing, Contacts, and Payments aims to broaden the platform, but execution risk is high. Layoffs of approximately 17% (~70 people) in February 2023 indicate cost pressure, and the US$3B valuation set at the SaaS peak creates a potential valuation overhang. Lack of audited disclosures limits visibility, but overall indicators suggest a financially sound private SaaS business.

Key strengths: US$350M Series B raised in January 2021 at ~US$3B post-money valuation, Reportedly profitable / cash-flow positive since prior to outside investment, Strong product-led growth with 20M+ users and 100K+ paying organizations, 86% of Fortune 500 are customers, Enterprise revenue +61% YoY; >$50K customers +400% YoY in 2023, High SaaS gross margins (industry comparable 75-85%), Diversified customer base across 230+ countries

Risk factors: Competitive pressure from Microsoft and Google bundling free scheduling tools, Single-product concentration in meeting scheduling, Post-2021 valuation overhang at peak SaaS multiples (~US$3B), Workforce reduction of ~17% in February 2023 indicates cost pressure, Lack of audited financial disclosures limits transparency, Execution risk on platform expansion (Notetaker, Routing, Payments)

Revenue by geography

Revenue by product/service

Workforce by country

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