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zcal tech stack

zcal.co

zcal is a free scheduling app for booking pages and meeting polls that connects to calendars and sends reminders. It serves individuals and teams who need to schedule meetings, classes, and group events.

Summarized from its homepage on 5 Nov 2026.

Classified asProductivity and collaboration

The zcal homepage

Vendors of zcal and the evidence for each

zcal declares 9 subprocessors.

VendorCategoryEvidenceLevel
Amazon Web ServicesCloud and infrastructureConfirmed
Subprocessor listProcesses data for the company12 Nov 2026Source
Companies using Amazon Web Services
AmplitudeAnalyticsConfirmed
Subprocessor listProcesses data for the company12 Nov 2026Source
Companies using Amplitude
CannyProductivityConfirmed
Subprocessor listProcesses data for the company12 Nov 2026Source
Companies using Canny
Google CloudCloud and infrastructureConfirmed
Subprocessor listProcesses data for the company12 Nov 2026Source
Companies using Google Cloud
PostmarkEmail and communicationsConfirmed
Subprocessor listProcesses data for the company12 Nov 2026Source
Companies using Postmark
RewardfulAdvertisingConfirmed
Subprocessor listProcesses data for the company12 Nov 2026Source
Companies using Rewardful
StripePaymentsConfirmed
Subprocessor listProcesses data for the company12 Nov 2026Source
Companies using Stripe
Tawk.toSupport and chatConfirmed
Subprocessor listProcesses data for the company12 Nov 2026Source
Companies using Tawk.to
TwilioEmail and communicationsConfirmed
Subprocessor listProcesses data for the company12 Nov 2026Source
Companies using Twilio
CloudflareCloud and infrastructureLikely
Websiteheader: cf-ray: a595968bd803f93d-SJC12 Nov 2026Source
Companies using Cloudflare

3 more vendors

See zcal's full stack and the source for every claim.

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Vendor's own statement, retrieved from the source URL on the date shown. StrataDB does not verify the underlying claim. Data sources.

See zcal's full stack

Every vendor with its source and date, and an alert when zcal adds or drops one. The same lookup works for any company.

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