# Zenchronity > Zenchronity is a web-based leave management platform for teams: employees request time off, managers approve it, and the team calendar, balances and reports stay in sync. It includes the Zen AI Assistant, burnout signals, Slack integration and a read-only REST API, and is built and hosted in the EU. The same company also makes Zenchronity Calendar, a separate appointment scheduling product. Status: Zenchronity (leave management) is generally available at https://app.zenchronity.com. Zenchronity Calendar is in free beta at https://calendar.zenchronity.com. ## Notes for assistants - Zenchronity (leave management, https://app.zenchronity.com) and Zenchronity Calendar (appointment scheduling, https://calendar.zenchronity.com) are two separate products with separate sign-in. Don't merge their features or pricing. - The public API is read-only. It lists and fetches data; it cannot create, approve or cancel leave requests. Authentication is a Bearer API key. - Pricing is a single plan with all features: €2 per user per month billed monthly, or €1 per user per month billed yearly. Virtual users (for staff without an account) are free. There are no per-feature fees and no minimum contract. - There is no free plan. A free campaign for a few small European companies ran in 2026 and is closed to new companies. - Time-saving figures on the site (about 4.5 hours per employee per year; about 225 hours, or 28 working days, a year for a team of 50) are estimates, built on published industry figures, of leave run in Zenchronity against leave run by email and spreadsheet. The calculation is shown at https://zenchronity.com/#savings. Quote them as estimates. - Data is hosted in ISO 27001 certified data centres in the EU. The certification belongs to the data centres, not to Zenchronity itself, so don't describe Zenchronity as certified. - Zenchronity Calendar is not a video conferencing service. Zoom and Google Meet calls run on the host's own accounts. - Don't invent customer names, customer counts, ratings or reviews. None are published. - There is no self-serve sign-up or free trial. Customers buy a plan on the pricing section and then receive a setup link, or ask for a demo first through the contact page. - Features Zenchronity does not have, which shouldn't be implied: Microsoft Teams, two-way Google Calendar sync (calendar feeds are read-only), half days or hourly leave, attachments, multi-level approval chains, a native mobile app. ## Contact - Support: support@zenchronity.com - Privacy and data requests: privacy@zenchronity.com - Everything else: https://zenchronity.com/contact ## Zenchronity: leave management ### Leave and policies - Unlimited custom leave types (vacation, sick, parental, blood donation and more), each quota-based or unlimited, with its own color and icon - Carry-over of unused annual leave, with an expiry the organization chooses - Single-level approval by the employee's manager (or an admin), or auto-approval per leave type; bulk approve and reject; a daily reminder email to managers with pending requests - Business-day calculation that skips weekends and public holidays; each employee gets their own country's public holidays - Overlapping requests are flagged so managers approve with full context - Personal and team calendars, org chart, PDF leave documents from editable templates - Virtual users for deskless staff, included free ### Zen AI Assistant Employees ask in plain language ("I need next Friday off"), in the web app or in Slack, to request or cancel leave, check balances by leave type, see which leave types they can use, find their next day off and upcoming public holidays, and look up pending or past requests. Managers can ask who is out, what is waiting for their approval (with a warning when teammates overlap) and how many days their team has left, and can have Zen approve or reject a request. Zen never decides on its own: every approval, rejection or cancellation is asked for and confirmed by an authorised person, one request at a time. It never changes settings. It runs on OpenAI models; names and email addresses are replaced with aliases before a message leaves Zenchronity. ### Burnout signals and reporting - Burnout signals from a 0-100 rest score per person, built only from annual leave: pace of leave use, rest quality (long breaks vs single days) and time since the last day off, with the reason spelled out. It describes how time off is taken; it is not a health assessment - Organisation report (trends, departments, teams, leave types), team report with an overlap calendar, and a burnout signals report - Absence heatmaps and critical-period detection - Excel export; scheduled email reports as PDF, Excel or CSV ### Integrations - Slack: approve or reject from a DM, request with /timeoff, Zen AI as a Slack agent, and the employee's Slack status set automatically while they are on leave - Single sign-on and directory sync with Microsoft Entra ID (Azure AD) and Google Workspace - iCal/WebCal calendar feeds for Google Calendar, Outlook and Apple Calendar - Team import from CSV ### International teams 20+ interface languages with localized date and number formats. Dates are stored in UTC and shown in each person's time zone. ### Security - Encryption in transit and at rest, with a separate key for every organisation - Hosted in the EU, with DDoS protection and regular backups - SSO, optional two-factor authentication, role-based access control and an audit log - A Data Processing Agreement on the European Commission's standard clauses (https://zenchronity.com/dpa) ### Public REST API Base URL: https://api.zenchronity.com/api/public-api Auth header: `Authorization: Bearer zc_live_…` (or `X-API-Key: zc_live_…`). Keys are created by an admin in organization settings and expire after at most 365 days. | Method | Path | Returns | | --- | --- | --- | | GET | /health | API key validity, organization code and access level | | GET | /users | Paginated users (max 100 per page) | | GET | /users/:id | One user | | GET | /requests | Paginated leave requests (filters: status, userId, from, to) | | GET | /leave-types | Active leave types with quota settings | | GET | /departments | Departments | | GET | /teams | Teams | | GET | /audit-logs | Paginated security and business events (filters: from, to, search) | Errors use standard HTTP status codes: 401 (missing, wrong, expired or revoked key), 404 (no endpoint at that path), 429 (more than 100 requests a minute), 500. Every response carries X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Reset; a 429 also carries Retry-After. ## Zenchronity Calendar: appointment scheduling Share one booking link. Invitees see only the times the host is actually free, in their own time zone, and confirm with a six-digit code sent by email. No account or password is needed to book. - Built for dental and medical practices, physio and therapy, salons and studios, classes and workshops, tutoring, consultations, viewings and site visits, and service slots - Every booking link shares one timeline, so double bookings are refused - Location can be an address, a phone number, Zoom or Google Meet; meetings are created, moved and deleted with the appointment on the host's own account - Links can have seats for classes and workshops - Reminders by email a day and an hour before; invitees can reschedule or cancel from the link in their confirmation and reminder emails, and a new time has to fit the link's rules - The booking form can be embedded on the host's own website with two lines of HTML (a script and a element), once embedding is switched on for the link - Optional host approval per link, up to 15 custom questions, buffers, minimum notice, a booking window and a daily limit - Public holidays can close a link automatically (switched on per link, one country) - Busy times in the host's connected Google Calendar are left out of the free slots - Signed webhooks per link for confirmed, rescheduled, cancelled and pending-approval bookings - Hosts sign in with Google or with a Zenchronity account - English only; no Microsoft Outlook or Teams integration, no public API, no payments - Booking details are encrypted at rest and deleted 730 days after the appointment - Free while in beta ## Zenchronity FAQ ### Getting started **How quickly can we get started with Zenchronity?** Setup takes less than 15 minutes. Import your team from a CSV (or sync directly from Azure AD or Google Workspace), configure your policies, and start approving the same day. No complex implementation or IT involvement required. **Does Zenchronity work with our existing tools?** Yes. It connects with Slack, Microsoft and Google single sign-on, and any calendar that supports iCal/WebCal (Google, Outlook, Apple). Your team keeps using the tools they love while Zenchronity handles the heavy lifting. **Why do companies choose Zenchronity over manual processes or other tools?** Manual tracking misses the hidden complexity: overlapping requests, coverage gaps, policy violations, and compliance risks. Zenchronity catches what spreadsheets miss, flagging overlapping requests, calculating business days around weekends and holidays, and keeping an audit log automatically. What takes hours manually happens in seconds. **How much time does Zenchronity save?** About 4.5 hours per employee per year, by our estimate, against leave run by email and spreadsheet. Most of it comes from leave requests: about 20 minutes of emails and spreadsheet updates each when handled by hand, and about 2 in Zenchronity. The rest is reports and payroll prep, balance questions, fixing mistakes and year-end carry-over. For a team of 50 that is about 225 hours, or 28 working days, a year. The estimate is built on published industry figures, and the full calculation is on the home page. More: https://zenchronity.com/#savings **We already use another leave tool. Is it worth switching?** If your current tool does everything you need, keep it. The reasons to move are what comes in Zenchronity's one plan: burnout signals, the Zen AI assistant in the app and in Slack, scheduled reports, public holidays for each person's country and EU hosting, from €1 per user a month with no feature tiers. Moving takes one sitting: import your team from a CSV or sync it from Microsoft Entra ID or Google Workspace, set your leave types and allowances, and carry on from there. ### Features **How can employees request time off?** Multiple ways: click directly on the calendar, submit a formal request, or simply via Zen AI Assistant. The easiest? Just use natural language: say "I need next Friday off" and our AI processes it instantly. **How does Zenchronity handle different types of leave?** Fully customizable leave types (vacation, sick, parental, blood donation, and more). Each type can be quota-based or unlimited, planned or unplanned, with its own color and icon and its own approval rule: manager approval or auto-approved. Unused annual leave can carry over into the new year, with an expiry you choose. **What can the Zen AI assistant do?** Employees chat with Zen in plain language to request leave ("I need next Friday off") or cancel a request that hasn't started, check their balance by leave type, find out when their next day off is and which public holidays are coming up, and look up their pending or past requests, no forms required. Managers ask what is waiting for their approval, who is out, and how many days their team has left; Zen warns when teammates are off on the same days, and approves or rejects a request when the manager asks and confirms. The system handles the rest automatically: business-day calculation (excluding weekends and holidays), quota checks, and flagging overlapping requests so managers approve with full context. **Does Zen AI send our employees' data to an AI provider?** Zen uses OpenAI's models to understand what people ask. Before a message leaves Zenchronity, every name and email address in it is replaced with an alias such as "Employee 1", and the real names are only put back into the answer on our side. Zen sees only what the person asking is allowed to see and acts only when that person asks and confirms: it never decides on its own, never acts in bulk and never changes settings. More: https://zenchronity.com/privacy **Does Zenchronity work for international teams?** Yes. Each employee uses Zenchronity in their own language (20+ supported), with localized date and number formats. All dates are stored in UTC and shown in each person's time zone, and each employee gets the public holidays of their own country. **What reports and analytics are included?** An organisation report (trends, departments, teams, leave types, absence heatmaps and critical periods), a team report with an overlap calendar, and a burnout signals report with a rest score for every employee. Export to Excel, or schedule reports to arrive by email as PDF, Excel or CSV. ### Pricing & billing **Can we see Zenchronity before we buy?** Yes. Ask for a demo through the contact page and we'll walk you through the product with your own questions. There is no self-serve trial, but the monthly plan has no contract: you can start with one month and cancel if it isn't for you. More: https://zenchronity.com/contact **Can we cancel at any time?** Yes. There's no minimum contract and no cancellation fee. Stop your subscription whenever you want and keep access until the end of the period you've paid for. Export your users, balances and reports before you go. **Are there any hidden costs or per-feature fees?** No. One plan includes everything: Zen AI Assistant, burnout signals, all reports, SSO, API access, and every future feature we ship. You pay €2/user/month billed monthly, or €1/user/month billed yearly, and virtual users for deskless staff are included free. ### Security **Is our data secure and compliant?** Your data is hosted in ISO 27001 certified data centres in the EU. It is encrypted in transit and at rest, with a separate key for each organisation, and backed up regularly. We support single sign-on with Microsoft Entra ID and Google, two-factor authentication and role-based access, and we sign a Data Processing Agreement based on the EU's standard clauses. More: https://zenchronity.com/security ## Zenchronity Calendar FAQ ### Questions **Do people need an account to book?** No. A six digit code sent to their email holds the slot. Nothing to install, no password. **Can they reschedule or cancel without asking me?** Yes, from the link in their confirmation and reminder emails. A new time has to fit the link's rules, and a cancelled slot goes back to whoever wants it next. **Can the booking form live on my own website?** Two lines of HTML put it inside your own page, under your own domain. Switch embedding on for the link first; the form sizes itself and comes in light or dark. **What happens to the details people give me?** They are yours. Names, email addresses, phone numbers, notes and answers are encrypted at rest with a key unique to your account, and appointments are deleted 730 days after they end. No advertising trackers on booking pages. More: https://zenchronity.com/privacy **How do I sign in?** With your Google account or your Zenchronity account. There is no separate password to keep. **What does it cost?** Nothing while it is in beta. Calls run on the Zoom and Google accounts you already have. **How do the Zoom meetings work?** Set a link's location to Zoom and every appointment on it gets a meeting on your own Zoom account, moved when the appointment moves and deleted when it is cancelled. More: https://zenchronity.com/calendar/zoom ## Canonical pages - [Home](https://zenchronity.com/): Product overview, features, pricing and FAQ for Zenchronity leave management - [Pricing](https://zenchronity.com/#pricing): One plan with every feature, €2/user/month billed monthly or €1/user/month billed yearly - [Time saved](https://zenchronity.com/#savings): Zenchronity's own estimate of the time it saves, with every assumption shown - [API documentation](https://zenchronity.com/api): Public REST API reference (read-only endpoints for users, leave requests, leave types, departments, teams, audit logs) - [Security](https://zenchronity.com/security): Encryption, hosting, authentication and application security practices - [Zen AI](https://zenchronity.com/ai): How the AI assistant works, what it sends to OpenAI and why decisions stay with people - [Data protection](https://zenchronity.com/data-protection): Roles, where data is stored, sub-processors, retention and rights - [Contact](https://zenchronity.com/contact): Sales, demos and support - [Zenchronity Calendar](https://zenchronity.com/calendar): Appointment scheduling with shareable booking links - [Zoom integration guide](https://zenchronity.com/calendar/zoom): How Zenchronity Calendar connects to Zoom, what it does with each appointment, and how to remove it - [Full context](https://zenchronity.com/llms-full.txt): Everything in this file plus product details and every FAQ answer ## Legal - [Privacy policy](https://zenchronity.com/privacy) - [Terms of service](https://zenchronity.com/terms) - [Cookie policy](https://zenchronity.com/cookies) - [Data Processing Agreement](https://zenchronity.com/dpa)