Aviationstack is a scalable REST API for real-time flight tracking, historical flight data, airport info, and global aviation data.
from $49.99/mo
About Hapio
What is Hapio?
Hapio is a headless booking and scheduling API designed for developers and businesses that need to add custom booking functionality to their applications. Instead of a pre-built calendar widget, Hapio provides a RESTful API and webhooks that give you full control over the user interface and booking logic — making it ideal for SaaS platforms, marketplaces, healthcare systems, and any industry that requires dynamic scheduling.
Who is it for?
Hapio is built for product teams, software developers, and technology companies who need a scalable booking backend without the constraints of a white-label or template-based solution. It works with any modern tech stack (React, Vue, .NET, PHP, etc.) and is especially suited for use cases in healthcare, recruitment, education, fitness, travel, and e-commerce. It is not for non-technical users who want a plug-and-play booking widget — Hapio requires development work to integrate.
Key capabilities
Hapio handles resources, services, time zones, appointments, availability logic, conditions, and more — all through a serverless architecture that scales automatically. Developers get a well-documented API, flexible API token permissions, a developer portal with logs, and the freedom to design every step of the booking flow. The platform is white-label by nature (no Hapio branding is forced), making it ideal for embedding scheduling into your own product.
Key features
- Headless RESTful API — Build any booking interface you want; no UI lock-in, full brand control.
- Serverless architecture — Scales automatically with your traffic; no infrastructure maintenance.
- Webhooks for all use cases — Receive real-time notifications on bookings, cancellations, and changes.
- Flexible API token permissions — Control access per token for secure multi-tenant or multi-user setups.
- Developer portal with API logs — Monitor usage, debug requests, and manage tokens from one dashboard.
- Works with any web technology — Integrate with PHP, .NET, React, Vue.js, or any stack that speaks JSON.
- Customizable availability and resource logic — Define services, time zones, conditions, and complex scheduling rules.
SaaSpartout Score
7.1
/10
Editorial score from our review methodology — not user ratings.
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Hapio Pricing
Hapio pricing: from €0/mo.
For comparison: the median starting price in Developer Tools is $19.99/month, measured across 301 tools we track. See the full SaaS Pricing Index →
Build (Free)
€0/month per project — Up to 1,000 requests/month, rate limit 100 req/min. No credit card required. Ideal for development and testing.
Essential
€29/month per project — 10,000 included requests/month, rate limit 250 req/min, €0.0029 per additional request. Best for small projects.
Grow (Most Popular)
€249/month per project — 100,000 included requests/month, rate limit 500 req/min, €0.0029 per additional request. For small to medium projects.
Scale
€599/month per project — 250,000 included requests/month, rate limit 1,000 req/min, €0.0029 per additional request. For large projects.
Enterprise
From €1,500/month — Unlimited requests, unlimited team members, custom rate limits, Premier Support. Contact for a quote.
All plans are pay-as-you-go (except the free Build plan). Start with the free plan — no credit card needed.
Frequently asked questions
How much does Hapio cost?
Hapio starts with a free Build plan at €0/month (up to 1,000 requests). Paid plans begin at €29/month (Essential) and go up to Enterprise from €1,500/month. All plans are per project.
Is there a free trial or free plan?
Yes. Hapio offers a free Build plan (€0/month) that includes up to 1,000 requests per month — no credit card required. You can start building immediately.
What is Hapio used for?
Hapio is a headless booking and scheduling API. Developers use it to add custom booking features to apps, websites, or SaaS platforms in industries like healthcare, recruitment, education, fitness, e-commerce, travel, and logistics.
Is Hapio a white-label solution?
Yes. Hapio is a true white-label solution — no branding is forced. You have full control over the user interface and can brand the booking experience as your own.
What are the main alternatives to Hapio?
Popular alternatives include Calendly API, Acuity Scheduling, SimplyBook.me, and Bookly. However, Hapio stands out for its headless, API-first approach that gives developers complete customizability — unlike most alternatives that offer fixed user interfaces.
Who is Hapio NOT for?
Hapio is not for non-technical users who want a ready-made scheduling widget with no coding. It requires development work to integrate the API and build the front end. If you need a turnkey booking tool, Calendly or Acuity may be better suited.
