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About

Cal ID is a cloud-based scheduling platform designed to streamline appointment booking and manage calendars for professionals and teams. The tool offers unlimited scheduling links, full customization of booking pages, and deep integrations with major apps like Google Calendar, Outlook, Zoom, Slack, and payment systems. It allows hosts to create multiple event types with different durations and rules, set up round-robin or collective scheduling for team availability, and automate reminders and follow-ups to reduce no-shows. The software supports multi-calendar sync so users can manage work, personal, and shared calendars in one place, and provides analytics on bookings, attendance, and conversion trends. Cal ID positions itself as a no-cost alternative with a free-forever plan offering key functionalities and an open source foundation that allows self-hosting or contributions.

About

Hubleto is an open-source CRM and ERP platform built for small and medium businesses that have outgrown spreadsheets but don't want the cost or complexity of enterprise software. With 30+ modular apps β€” covering customer management, sales pipeline, orders, invoicing, projects, warehousing, and more β€” Hubleto lets you activate only what you need and expand as your business grows. All workflows in one unified platform, with no switching between tools. What sets Hubleto apart: it's fully open source with no vendor lock-in. Your data always belongs to you. Run it in the cloud or self-host on your own infrastructure. The free Community plan is available forever with no credit card required. The Premium plan (€9/user/month) includes unlimited users, enterprise apps, and 24/7 support with a 30-day free trial. The Superior plan (€19/user/month) adds custom branding, advanced customizations, and 1-on-1 support. Available in English, Slovak, Czech, and Polish. Open API for developers

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Solopreneurs, service professionals and small teams in search of a tool to manage bookings, automate reminders and optimize calendar workflows without paying for basic features

Audience

Hubleto is designed for small and medium-sized businesses (1–500 employees) that need a flexible, affordable alternative to traditional CRM and ERP systems. It is ideal for companies across industries including manufacturing, wholesale and distribution, healthcare, professional services, energy, insurance, and the public sector. Key users include business owners, operations managers, sales teams, and IT managers who want full control over their data without relying on expensive third-party vendors. Hubleto is also well-suited for developers and technical consultants looking to build or customise business applications on an open-source framework.

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Free Version
Free Trial

Pricing

Free
Open source
Free Version
Free Trial

Reviews/Ratings

Overall 4.9 / 5
ease 4.6 / 5
features 4.7 / 5
design 4.6 / 5
support 4.6 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Pros & Cons from Real Users

Pros

  • It’s very simple to use and seamlessly manages your calendar. Removes the manual to and fro for scheduling.
  • Completely free with no feature limits - Unlike competitors like Calendly that restrict free users to one event type, cal.id offers unlimited scheduling with all features available at no cost Cal, which is particularly valuable for freelancers, creators, and solopreneurs. Built-in payment processing - The platform allows you to accept payments directly for meetings and appointments within the scheduling system, eliminating the need for separate payment solutions. Extensive integrations and white-label options - Cal.id connects with popular tools like Salesforce, Slack, and Zoom, and offers white-label embedding on your own domain with ISO, GDPR, and CCPA compliance included
  • Love this using and it's great for call booking and i can see the analytics as well. Thanks team to make it so great
  • Been using it for a while and can say this is fast and easy to setup and also have all the features that I require to start my therapy sessions.
  • Cal ID makes scheduling straightforward and practical. The setup is quick, the booking pages look clean, and calendar syncing works well for day-to-day use. I especially like that the core features are genuinely free, including multiple event types and team scheduling, which is rare compared to similar tools. It eliminates back-and-forth emails and works well for client calls, internal meetings, and basic team coordination without unnecessary complexity. and quick support over chat with live meeting also

Cons

  • So far, didn’t find anything which I didn’t like.
  • Newer, less established platform - As a relatively new entrant competing against established players like Calendly, it may have a smaller user base and potentially fewer third-party integrations or community resources available. Limited track record - Being a newer service means there's less long-term data on reliability, ongoing development, and whether the free model is sustainable, which could raise questions about future pricing or feature changes. Potential feature maturity - While it offers many features, some advanced capabilities or refinements that come with more mature platforms may still be in development or less polished compared to competitors that have had years to optimize their user experience.
  • it's too great, when you use it you will fall in love with it. so if you wanna fall in love with its feature go man and use it. Thanks team to make it so great
  • As of now nothing, as they are new and adding so many features speedily
  • Some advanced customization options and deeper workflow automation are limited compared to more mature enterprise tools. A few settings take time to discover, and documentation could be clearer for first-time users who want to fine-tune rules or integrations.

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Cal ID
United States
cal.id/

Company Information

Hubleto
Founded: 2026
Slovakia
www.hubleto.eu/en

Alternatives

Alternatives

Better Execute (DCE)

Better Execute (DCE)

Better Execute

Categories

Categories

Appointment Scheduling Features

Appointment Reminders
Automated Scheduling
Calendar Sync
Client Database
Group Scheduling
Mobile Access
Multi-Location
Online Booking
Online Payments
Recurring Appointments
Room Booking Management

Integrations

Basecamp
Discord
Element
FaceTime
Horizon Workrooms
Linear
PayPal
PostHog
Salesroom
Stripe
Sylaps Business
Tandem
Umami
Vimcal
WhatsApp
Whereby
Zapier Canvas
Zoho CRM Plus
Zoom
viaSocket

Integrations

Basecamp
Discord
Element
FaceTime
Horizon Workrooms
Linear
PayPal
PostHog
Salesroom
Stripe
Sylaps Business
Tandem
Umami
Vimcal
WhatsApp
Whereby
Zapier Canvas
Zoho CRM Plus
Zoom
viaSocket
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