Early shift uncovered? Klacks suggests a replacement who fits. It checks rest periods before the plan goes out.
Klacks rosters shifts automatically, checks OWTA rest periods and documents planned and worked hours as a basis for Banded Hours applications — open source, installable on your own premises, and optionally with a locally hosted AI model.
No license fees under the AGPL.
- Your data stays with you
- AI with free choice of model
- 25 languages
- Open Source · AGPL-3.0 · no license fees
- Open to your AI agents (MCP)
Plan a week - Video 1 of 2
Note on the sample data: All names, places (for example Winterthur), addresses and figures in these recordings are fictitious demo data with a Swiss background, written in Latin script. They only illustrate the product – you do not need to know or be able to read them. In your own installation you enter your own data, and the interface is multilingual.
This is how you talk to Klacksy — you can see these sentences in the videos:
For small, medium-sized and large businesses
By company size
- Small · up to 50 employees You say what you need — Klacks plans, you confirm. Without license fees, on an office PC.
- Medium · 50 to 250 employees Fewer people, the same number of shifts: Klacks fills gaps in line with your rules and suggests a replacement who fits.
- Large · over 250 employees No license per employee, no user fees, no subscription — with 2,000 people the maths works out differently than with 20.
Built for shift- and field-based operations
One platform, many industries: Wherever staff are scheduled in shifts, in the field, and by qualification — Klacks adapts to you, not the other way around.
What Klacks covers in each industry
- Home Care
- Routes, qualifications, and care surcharges — scheduled automatically.
- Hospitals
- 24/7 coverage, rest periods, and hospital-grade data protection.
- Security
- Sites, patrols, and certifications reliably covered.
- Cleaning Services
- Site routes and rotating teams scheduled efficiently.
- Logistics
- Routes, working and rest times, and cross-border operations under control.
- Hospitality & Food Service
- Split shifts, premiums, and rest periods — scheduled with automatic rest-period checks.
- Another industry?
- Your operational rules — set up in a chat with Klacksy, automatically checked by the planning engine, no coding required.
Monday, 6:40 a.m. Someone is missing from the early shift.
You quickly assign a colleague who worked a late shift until 10 p.m. yesterday. Klacks flags it immediately: rest period too short — 9 hours instead of the configured 11. You see the problem before the schedule goes out, not only when someone works it out afterwards.
Watch in the video: rest period too shortEveryday scheduling in Irish businesses OWTA, Banded Hours and the question of data sovereignty
- Keeping the OWTA weekly working-time limit under control The Organisation of Working Time Act 1997 caps average working time at 48 hours a week, with a standard reference period of 4 months. An extension to 6 months applies only to specific activities such as security or healthcare — tracking this by hand is error-prone.
- Banded Hours & shift notice Under Section 18A OWTA, employees can apply for placement in a band of hours if their contracted hours don't reflect reality; the employer then has 4 weeks to respond. Section 17 OWTA also requires at least 24 hours' advance notice of start and finish times where the roster isn't fixed.
- Your own servers instead of a third-country cloud The Data Protection Act 2018 implements the GDPR in Ireland, with the Data Protection Commission (DPC) as the supervisory authority. Especially when it comes to AI features, many businesses have to ask whether staff data may go into a third-country cloud at all.
What Klacks can do — in real recordings
Short videos from the running app, sorted by topic. Choose a chapter; only the video of the open chapter ever plays.
Note on the sample data: All names, places (for example Winterthur), addresses and figures in these recordings are fictitious demo data with a Swiss background, written in Latin script. They only illustrate the product – you do not need to know or be able to read them. In your own installation you enter your own data, and the interface is multilingual.
- Klacksy helps you get it right in every one of these cases: describe your rule in the chat in your own words, for example “Sundays earn a 50% surcharge.” — Klacksy asks follow-up questions, shows a preview and only saves once you confirm.
- Klacksy also creates scenarios and starts planning inside them — tell it in the chat, for example: “Plan Winterthur from November 2 to 8.”
- Klacksy, the built-in AI assistant, can also do all of this for you on request — for example, tell it in the chat: “Add expenses of 24.50 for Mia on October 6.”
Uniform nationwide, split at the border
The Republic of Ireland has no public holidays at county or municipal level: all statutory holidays apply uniformly nationwide under the Organisation of Working Time Act 1997. For businesses with ties to Northern Ireland, though, what applies across the border still matters — a completely separate holiday regime is in force there.
- No patchwork within Ireland itselfUnlike many other countries, the Republic of Ireland has no public holidays at county or municipal level — the Organisation of Working Time Act 1997 sets all statutory holidays uniformly nationwide. Northern Ireland, as part of the United Kingdom, has an entirely separate regime.
- Combining the Republic and Northern IrelandA business in the border region — say, in Dundalk (County Louth) or Letterkenny (County Donegal) — or with locations in Dublin and Belfast keeps both calendars side by side: St. Brigid's Day (the first Monday in February) and the June bank holiday in the Republic, Orangemen's Day (12 July) in Northern Ireland.
- Active or informational onlyYou decide per calendar whether a holiday affects hours & surcharges — or simply appears as a reminder.
It all comes down to the settings
Klacks offers countless ways to calculate rules and hour credits for nights, weekends, public holidays and overtime — exactly the way your contracts and company agreements require.
- Nights and weekends You set the night window and the surcharge rates yourself, and choose up to three weekend days — as a multiplier that is added to the hours worked as a time credit in hours.
- Public holidays and overtime A separate public-holiday rate, and overtime per day or per week in up to three tiers. When several surcharges fall on the same hour, the highest one applies — or all of them add up.
- Your own calculation with a macro If that is not enough, a macro does the maths: a short script using weekday, time of day, public holidays and contract values — with conditions, loops and functions of your own.
- Scheduling rules Rest periods, maximum daily and weekly hours, consecutive working days, free Sundays or hour caps per period — each one as a warning or, in automatic planning, as a block.
Rule violations: Klacks warns you instantly
Klacks flags time collisions, rest periods that are too short, too many consecutive working days and work on holidays right as you plan — as an error or warning in the error list.
Rest period too short - Video 1 of 4
How Klacks takes the load off Irish businesses
From automatic rest-period checks to your own infrastructure — it all fits together.
Weekly working-time limit monitored automatically
Klacks monitors the rolling 48-hour average live over the reference period you have configured, as set out in OWTA Section 15, and warns before the limit is exceeded — including the sector-specific extension to 6 months for security and healthcare, if you configure it, correctly factoring in each employee's start date.
Read more
On request, Klacks blocks any breach in the automatic planning paths (e.g. wizard, suggestions, substitution); in manual planning, Klacks warns.
Rest periods observed automatically
The daily rest period of at least 11 consecutive hours (Section 11) and the weekly rest period of at least 24 hours (Section 13), which you set up as rules, are monitored in real time — Klacks makes any deviation visible immediately.
24-hour notice period as planning deadline
You store the 24-hour advance-notice period for start and finish times required by Section 17 OWTA as the minimum lead time; Klacks uses it to calculate by when the roster must be finished.
Read more
There is no automatic check at publication.
Banded Hours applications documented
Klacks records actual hours worked over 12 months, so an application for Banded Hours under Section 18A OWTA can be answered cleanly within the 4-week deadline.
Installed on your premises: data on your servers
Klacks runs on your own infrastructure, and you choose the AI model — with a locally hosted model, no AI request containing staff data goes to an external AI provider.
Klacksy: rule-based, not a black box
The built-in AI assistant Klacksy understands instructions in everyday language and controls Klacks; the rule-based planning engine calculates the plan — traceable through defined rules, not an opaque AI decision.
Test plan changes risk-free
Before a plan change goes live, you can run it through as an isolated copy — the 11-hour daily rest period (Section 11) and surcharges are calculated live exactly as in the real plan.
Read more
Only once everything checks out do you apply the variant; until then, your live schedule stays untouched. This lets you prepare a suitable scenario in advance for foreseeable situations — such as a staff member calling in sick or a sudden spike in orders — so you're ready to act immediately when it matters, instead of improvising under time pressure. There's no artificial limit on the number of scenarios — create as many as your planning needs.
Klacksy: the assistant built into your team's workflow
Klacksy isn't a bolted-on marketing chatbot — it's embedded directly in the Klacks interface. Staff and schedulers ask about shift times via chat or clarify availability. A built-in skills and rules system ensures Klacksy only ever makes transparent suggestions — never a black-box decision. For businesses with strict data protection requirements, the AI model can also be hosted locally, which matters with the DPC in mind too.
Note on the sample data: All names, places (for example Winterthur), addresses and figures in these recordings are fictitious demo data with a Swiss background, written in Latin script. They only illustrate the product – you do not need to know or be able to read them. In your own installation you enter your own data, and the interface is multilingual.
Workforce scheduling where you stay in control.
That way staff data is stored on your own servers; the legal assessment towards the Data Protection Commission (DPC) remains with you.
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Open source under AGPL-3.0
The source code of the backend and the interface is public. Your IT team can check what Klacks does with personnel data — and keep running Klacks independently of us.
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Data on your servers
Klacks runs on your own servers. Personnel data is held in your infrastructure; the data-protection assessment under the laws of your country remains with you.
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Your choice of AI model
Klacksy works with the model of your choice — from external providers to a model you run yourself. You decide on cost, data protection and provider.
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No lock-in with big cloud providers
Your data lives in your own database (PostgreSQL), the code is open, and you switch the AI provider in the settings.
No license fees does not mean no costs. Servers, operation and maintenance cost money, and so does an external AI model — what you do not pay is a fee per employee.
Your data is stored on your own servers. For address lookup and route calculation, Klacks uses public services based on OpenStreetMap by default; addresses and coordinates are sent there without names. The documentation lists which other external services Klacks calls.
Your AI agents work directly with Klacks
Klacks speaks MCP (Model Context Protocol), the open standard through which AI agents work with software. Any agent that speaks the open standard MCP — such as Claude, Cursor or your own agents — can work directly with Klacks: with the tools Klacksy uses as well, and only with the rights of the connected user.
Operating steps in the interface and sensitive functions such as managing access tokens stay locked, and an agent never receives more than supervisor rights.
How to connect your agentKlacks in numbers Facts, not promises
- 100% open-source code Your IT team can check every line.
- 25 languages Schedulers work in their own language.
- 6+ industry solutions Templates for Home Care, Hospitals, Security, Cleaning Services, Logistics and Hospitality & Food Service – and for any other industry Klacksy sets up your own rules in a dialogue.
- 30+ countries Public holidays and rules preconfigured for your country.
Also in Klacks:Shift planningRoute optimizationAI assistantScenariosAbsencesRules & surchargesInstalled on your premisesOpen Source
In practice: 24 hours' notice, one view
A roster changes at short notice. Klacks checks the 11-hour rest period live; whether the 24-hour advance-notice period under Section 17 OWTA is met is not checked automatically by Klacks — but you no longer have to recalculate the rest period by hand.
Experience Klacks in your business
Try the Playground to see how Klacks automates OWTA working-time limits, rest periods and Banded Hours — installed on your premises or in the Playground, no license fees and without registration.
Klacks is open source under the AGPL-3.0. Host it yourself, keep your data with you, pay no license fees — you stay in full control.
How it works Your finished shift plan in three steps
- Install Klacks is installed on your own infrastructure — via Docker; allow about half an hour for the first start.
- Adjust rules Public holidays and rest periods come preconfigured for your country, surcharges where defined for your country — and you can adjust them anytime.
- Plan automatically Klacks builds shift plans, flags conflicts and optimizes routes — with an AI assistant if you want.
Get started right away Try it. Download it. Get going.
No demo appointments, no sales calls: try Klacks right in your browser — or install it on your own server or an office PC.
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Try it in the Playground
A public Klacks instance with sample data — right in your browser, no installation, no registration.
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Install it on your own server or PC
The installation package contains the installer and the configuration for the database and HTTPS; the installer pulls the Docker images from the registry at startup. One command starts the installation.
Download the installation package -
Source code on GitHub
Klacks is open source under the AGPL-3.0. Backend, frontend, and Docker images are public — inspect it, fork it, contribute.
View the repository