Aviationstack is a scalable REST API for real-time flight tracking, historical flight data, airport info, and global aviation data.
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About Onsched
What is Onsched?
Onsched is a white-labeled scheduling API that allows you to build booking and appointment functionality into your app or marketplace. It handles complex scheduling needs, such as vaccination appointments and mental health sessions, with features like calendar sync, email templates, SMS notifications, and custom fields.
Problem it solves
Building scheduling from scratch is time-consuming and error-prone. Onsched provides a mission-critical API that scales under pressure, ensuring your booking system works even at high volume. It simplifies complex use cases like multi-timezone bookings, permissions, and custom data collection.
Who it is for
Onsched is ideal for developers, SaaS platforms, and marketplaces that need to integrate robust scheduling without building it themselves. It is particularly suited for healthcare, telehealth, and other industries with strict compliance needs (HIPAA, SOC 2). It is not for simple single-user appointment tools—it's built for scale and complexity.
Real use cases
During the pandemic, Onsched handled ~80% of all COVID-19 vaccine appointments in Canada, demonstrating its reliability for large-scale, time-critical deployments. Other use cases include mental health clinics, telehealth platforms, and any service marketplace needing white-labeled booking.
Key features
- Custom Fields & Permissions — Collect exactly the data you need and control user access with granular permissions.
- Single API Key — Simplify integration with one key for all your scheduling endpoints.
- Dashboard — Manage bookings, users, and settings from a central admin panel.
- Email Templates — Customize every email with your brand and logo.
- Calendar Sync — Sync seamlessly with Google and Outlook calendars via the API.
- World Time Zones & Scalability — Handle bookings across time zones and scale to millions of appointments.
- HIPAA & SOC 2 Compliant — Meet enterprise security and compliance standards.
SaaSpartout Score
7.3
/10
Editorial score from our review methodology — not user ratings.
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Onsched Pricing
Onsched pricing: Pricing not publicly listed.
For comparison: the median starting price in Developer Tools is $19/month, measured across 301 tools we track. See the full SaaS Pricing Index →
Custom Pricing
Onsched does not list public pricing. Contact sales for a custom quote based on your specific needs and volume. Free demo available.
Frequently asked questions
What is Onsched?
Onsched is a white-labeled scheduling API that powers booking and appointment features in your app or marketplace. It handles complex scheduling, integrates with calendars, and scales to high volumes.
How much does Onsched cost?
Onsched does not publish pricing. You need to book a demo or contact sales for a custom quote based on your requirements. A free demo is available.
Is Onsched free?
Onsched offers a free demo, but there is no free plan mentioned. Pricing is custom and requires contacting sales.
Who is Onsched best for?
Onsched is best for developers, SaaS platforms, and marketplaces that need reliable, white-labeled scheduling at scale, especially in healthcare or other complex industries.
What are top alternatives to Onsched?
Alternatives include scheduling APIs like Calendly's API, Acuity Scheduling, and Spacedeck. However, Onsched differentiates with its focus on complex, high-volume use cases and compliance.
Does Onsched support HIPAA compliance?
Yes, Onsched is HIPAA compliant, making it suitable for healthcare applications that handle protected health information.
