Last updated: March 20, 2026
These Terms of Service (the “Terms”) form a binding agreement between you and Calso Inc., a corporation incorporated under the laws of the Province of Ontario, Canada (“Calso”, “we”, “our”, or “us”), and govern your access to and use of the Calso scheduling platform at calso.io and any related services. Throughout these Terms, “Calso” refers to Calso Inc.
By accessing or using Calso (calso.io), you agree to be bound by these Terms of Service and our Privacy Policy. You must be at least 18 years of age to use this service, or have the consent and supervision of a parent or legal guardian. If you do not agree to these terms in their entirety, you must discontinue use of the service immediately.
You are responsible for maintaining the confidentiality of your account credentials and for all activities that occur under your account. You must provide accurate and complete information when creating your account and authenticate via Google OAuth as required by the platform. Calso shall not be liable for any loss or damage arising from your failure to safeguard your account credentials, and you agree to notify us immediately at support@calso.io if you suspect any unauthorized access.
Calso offers both free and paid subscription plans with varying features and usage limits. Paid subscription plans are billed in advance on a recurring basis through Stripe, our subscription payment processor. You agree to provide accurate and current billing information and authorize Calso to charge the applicable subscription fees to your designated payment method. Separately, hosts may configure Stripe Connect or PayPal to receive booking-related payments from their guests; in those cases, payments from a guest to the host are processed under the respective terms of Stripe or PayPal, and Calso acts as a facilitator rather than the merchant of record for that transaction. All fees are quoted in the currency displayed at checkout and are non-refundable except as expressly stated in Section 4.
You may cancel your paid subscription at any time through your account settings, and cancellation will take effect at the end of your current billing period. Upon cancellation, you will retain access to paid features until the end of the period for which you have already paid. Refunds are generally not provided for partial billing periods; however, we may issue refunds at our sole discretion in exceptional circumstances. Free-tier accounts may be deleted at any time by contacting support@calso.io.
You agree to use Calso only for lawful purposes and in accordance with these Terms. You shall not use the service to send spam, harvest personal data without consent, impersonate others, distribute malware, or engage in any activity that disrupts or interferes with the operation of the platform. You are solely responsible for the content of your booking pages, event descriptions, and any communications sent through the service. We reserve the right to suspend or terminate accounts that violate these acceptable use provisions without prior notice.
The Calso platform, including its name, logo, software, design, features, and all associated content, is the exclusive property of Calso and is protected by Canadian and international copyright, trademark, and intellectual property laws. You retain ownership of all content you upload or create on the platform, and you grant Calso a limited, non-exclusive license to use such content solely for the purpose of providing the service. You may not copy, modify, distribute, or reverse-engineer any part of the Calso platform without our prior written consent.
Calso is provided on an "as is" and "as available" basis without warranties of any kind, either express or implied, including but not limited to implied warranties of merchantability, fitness for a particular purpose, and non-infringement. In no event shall Calso, its officers, directors, employees, or agents be liable for any indirect, incidental, special, consequential, or punitive damages, including loss of profits, data, or business opportunities, arising out of or related to your use of the service. Our total aggregate liability for any claims arising under these Terms shall not exceed the amount you paid to Calso in the twelve (12) months preceding the claim.
Calso is a multi-sided platform: hosts (workspace owners) use Calso to publish booking pages and accept bookings, while guests (clients) book sessions through those pages. When a guest books a session, the host collects information from the guest — including name, email, intake responses, and any other fields the host has configured — through the Calso platform. Hosts are independently responsible for the lawfulness of how they collect, use, retain, and disclose information about their guests, including obtaining any consent required under applicable privacy laws (such as the GDPR for EU/EEA guests, the CCPA for California guests, and PIPEDA for Canadian guests), responding to access, correction, deletion, and other data-rights requests from their guests, and providing those guests with an appropriate privacy notice if and as required. Calso processes guest information on behalf of the host that collected it and acts on the host's instructions in doing so. In jurisdictions that recognize the controller / processor distinction, the host is the controller of guest information collected through their workspace, and Calso is a processor. Calso will assist hosts with data-rights requests where reasonably possible, but compliance with applicable privacy laws as they apply to the host's collection and use of guest information remains the host's responsibility. Hosts may request a written Data Processing Agreement (DPA) by contacting support@calso.io.
Calso uses the following sub-processors to operate the platform: Stripe and PayPal for payment processing; Google and Microsoft for calendar synchronization and OAuth-based authentication; Resend for transactional email delivery; Vercel for application hosting; Supabase (PostgreSQL on AWS ca-central-1) for database and file storage; Sentry for application error monitoring; and Google Analytics for aggregate traffic analytics on our public marketing pages. Each sub-processor operates under its own terms and privacy policy. We will provide at least thirty (30) days advance notice via email to active workspace owners before engaging a new sub-processor that processes guest information collected through Calso. If you object to a new sub-processor on reasonable grounds related to data protection, you may terminate your subscription before the new sub-processor takes effect, and a pro-rata refund of any prepaid fees for the unused portion of your then-current billing period will be your sole and exclusive remedy.
We reserve the right to modify these Terms of Service at any time at our sole discretion. When we make material changes, we will notify affected users via email or through a prominent notice within the service, and we will update the "Last updated" date at the top of this page. Your continued use of Calso after such modifications constitutes your acceptance of the revised Terms. If you do not agree with the updated Terms, you must stop using the service and cancel your account.
Calso Inc. is incorporated under the laws of the Province of Ontario, Canada, and its registered office is located at 14-4400 Montrose Rd, Niagara Falls, ON, Canada L2H 1K2. These Terms of Service shall be governed by and construed in accordance with the laws of the Province of Ontario and the federal laws of Canada applicable therein, without regard to conflict of law principles. Any disputes arising from or relating to these Terms or your use of the service shall be subject to the exclusive jurisdiction of the courts located in Ontario, Canada. You irrevocably consent to the jurisdiction and venue of such courts.
If you have any questions, concerns, or feedback regarding these Terms of Service, please contact us at support@calso.io, or by mail at: Calso Inc., 14-4400 Montrose Rd, Niagara Falls, ON, Canada L2H 1K2. We will make reasonable efforts to respond to all inquiries within a timely manner.