Calendly

Calendly is a cloud-based scheduling automation platform founded in 2013 and the category leader by funding and market penetration. It lets users publish availability as a shareable link; invitees self-select a slot, and both calendars update automatically. Used by 86% of Fortune 500 companies as of mid-2024. The platform spans individual use through enterprise deployments with team routing, round-robin assignment, CRM sync, and an official MCP server for AI agent integration.

Shareable booking links with configurable availability rules, buffer times, and time zone detection. Multiple event types: one-on-one, round-robin, collective (multi-host), and group. Team features include pooled availability, managed events, admin-locked templates, and lead routing forms. Automated email/SMS reminders, follow-ups, and no-show tracking. Embeddable booking widgets. Meeting polls for group scheduling. Browser extension for inline link sharing. Acquired Prelude (interview scheduling) in 2022, expanding enterprise recruiting use cases.

Calendly launched an official hosted MCP server at mcp.calendly.com (announced March 2026). The server uses OAuth 2.0 with Dynamic Client Registration (DCR/RFC 7591) — no pre-registered client_id needed. Scopes cover mcp:scheduling:read and mcp:scheduling:write. Supported actions include: checking and updating availability, creating and updating event types, managing and booking meetings, and generating single-use scheduling links. Compatible with ChatGPT, Claude, Cursor, and any MCP 2025-03-26+ streamable HTTP client. Self-hosting is not supported; Calendly hosts the server exclusively. REST API available for custom integrations; invitee data deletion also available via API. MCP availability is on all Calendly plans including free tier.

Four tiers, per-seat. Free: 1 event type, 1 calendar, unlimited meetings, basic video conferencing. Standard: $10/seat/month (annual) or $12/seat/month (monthly) — unlimited event types, 6 calendars, group events, email reminders, Zapier, HubSpot, Stripe/PayPal. Teams: $16/seat/month (annual, seats 1–30, volume discounts above 30) or $20/seat/month (monthly) — adds Salesforce integration, round-robin, lead routing, routing forms, admin-managed events, Marketo/Pardot. Enterprise: custom, minimum reportedly $15,000/year — adds SAML SSO, SCIM, Domain Control, audit log, dedicated support, advanced Salesforce routing suite, and invitee data deletion. Invoice payment available on Standard/Teams at $5,000 minimum and Enterprise at $15,000 minimum. 14-day free trial on paid tiers.

Native: Google Calendar, Microsoft Outlook/Office 365, iCloud, Zoom, Google Meet, Microsoft Teams, Slack, Salesforce (Teams+), HubSpot (Standard+), Marketo, Pardot, Stripe, PayPal, LinkedIn (announced March 2025), Zapier, and Typeform. Official MCP server at mcp.calendly.com. REST API with webhook subscriptions for event notifications. Browser extension (Chrome). Broad Zapier/Make ecosystem for long-tail tool connections.

SOC 2 Type II and ISO/IEC 27001 certified. GDPR compliant with a Data Processing Addendum (DPA) incorporated into Terms of Use. PCI compliant for payment processing (via Stripe). Follows FINRA and GLBA guidelines for financial institutions. CCPA compliant. Hosted on Google Cloud (GCS); data encrypted at rest and in transit. SAML 2.0 SSO and SCIM provisioning on Teams+SSO and Enterprise plans. Audit (activity) log and role-based permissions on Enterprise. MFA enforced via IdP. 24/7 security operations monitoring. Full SOC 2 report available via Whistic Security Center under NDA.

Founded 2013 in Atlanta, GA by Tope Awotona (CEO). Bootstrapped from a $550K seed round (Atlanta Ventures, April 2014) until a $350M Series B in January 2021 led by OpenView Venture Partners and ICONIQ Capital at a $3B valuation — bringing total funding to ~$352M. No subsequent primary funding rounds publicly disclosed. Acquired Prelude (interview scheduling) in September 2022. Approximately 532–545 employees as of 2026. Notable customers include LinkedIn, Zendesk, and 86% of Fortune 500 companies.

Moderate. Calendly handles meeting scheduling metadata (names, emails, meeting times, company names of counterparties) but not core deal documents, financial models, or LP data — placing it at medium sensitivity. For a small growth equity firm like a firm, it is a practical, low-friction tool for coordinating LP calls, founder diligence meetings, and portfolio check-ins. The official MCP server at mcp.calendly.com enables AI agents (Claude, ChatGPT) to book and manage meetings directly via natural language, which fits a firm's AI-native workflow mandate. The Teams plan's Salesforce integration allows scheduling activity to flow into the CRM. Limitations: it is a point tool (scheduling only), does not carry deal intelligence, and lacks the relationship-graph depth of purpose-built VC tools like Affinity. Most growth equity firms use it as a utility layer, not a strategic system.

SAML SSO and SCIM locked behind Teams+SSO add-on or Enterprise — not included in the standard Teams plan. No native support for Just-in-Time (JIT) SCIM provisioning. MCP server hosted exclusively by Calendly; no self-hosting option, which may concern security-conscious firms. Event rescheduling is not supported via API (only cancellation). Per-seat pricing scales quickly for larger teams. No built-in deal or relationship intelligence — purely a scheduling utility. UI flexibility is limited compared to custom-built scheduling flows.