Early shift uncovered? Klacks suggests a replacement who fits. It checks rest periods before the plan goes out.
Klacks schedules shifts automatically, monitors working time under the Working Time Regulations 1998, and can be controlled through an AI assistant — installed on your own premises, open source, with the AI model of your choice — optionally locally hosted.
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 UK businesses Working Time Regulations, rest periods and data protection
- Keeping the 48-hour week & opt-out under control The Working Time Regulations 1998 cap average weekly working time at 48 hours, calculated over a standard 17-week reference period — extendable by agreement. Staff can opt out in writing, which makes manual tracking even harder.
- Guaranteeing daily & weekly rest periods The WTR require at least 11 consecutive hours of rest per 24 hours and 24 uninterrupted hours per 7-day period (Reg. 10 & 11) — error-prone to track by hand across rotating shifts.
- Biometric time tracking as a data protection risk In February 2024, the ICO took enforcement action against Serco Leisure after facial recognition and fingerprint clocking systems at 38 sites processed data on over 2,000 employees without a lawful basis — a warning sign for any time-tracking solution.
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.”
A calendar for every nation
Bank holidays are anything but uniform across the United Kingdom: England & Wales, Scotland and Northern Ireland each observe their own set of statutory holidays, and individual councils add local holidays on top — such as Glasgow Fair Monday, the third Monday in July. Klacks handles exactly what simple tools get wrong.
- Three nations, three sets of holidays2 January and St Andrew's Day (30 November) are bank holidays only in Scotland; St Patrick's Day (17 March) and the Battle of the Boyne — known as "the Twelfth" (12 July) — only in Northern Ireland: pre-configured and ready to use.
- Mix calendarsA care, security or logistics business with sites in London, Edinburgh and Belfast runs all three calendars side by side — including bank holiday premiums and the reduced staff availability on days when nurseries and schools close in only one nation.
- Binding or purely informationalFor each calendar, you decide whether a bank holiday affects hours & premiums — 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 UK businesses
From automatic rest-period control to time tracking without biometrics — everything works together.
48-hour limit & opt-out kept in view
Klacks monitors the rolling 17-week average of working time live, correctly factoring in each employee's start date, and warns before the 48-hour limit under WTR Reg. 4 is exceeded — while flagging who is working beyond it under an opt-out.
Read more
On request, Klacks hard-blocks a breach in automatic planning; with manual planning it stays at a warning. Fully traceable for any inspection.
Rest periods checked automatically
The 11-hour daily rest and 24-hour weekly rest under WTR Reg. 10 & 11 are factored into every automatic shift plan — and any breach is immediately made visible.
Time tracking without the biometric risk
Klacks records working time without needing facial recognition or fingerprints — which removes the very trigger that led the ICO to step in at Serco Leisure.
Installed on your premises: data on your servers
Klacks runs on your own infrastructure, and you choose the AI model yourself — optionally locally hosted, so that no staff data goes to external AI providers.
Read more
This supports the requirements of UK GDPR and the Data Protection Act 2018.
Keeping an eye on the Employment Rights Act 2025
The Employment Rights Act 2025 received Royal Assent on 18 December 2025 and will in future govern advance notice periods for shifts and compensation for cancelled shifts — the exact thresholds have yet to be set.
Read more
You can already store a minimum notice period as a planning deadline today; Klacks uses it to calculate when the schedule must be ready. Klacks does not calculate compensation for cancelled shifts.
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 under WTR Reg. 10 and premiums 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
Klacksy isn't a bolted-on marketing chatbot — it's embedded directly in the Klacks interface. Staff and schedulers use chat to check shift times or clarify availability. A built-in skills and rules system ensures Klacksy always makes traceable suggestions — never a black-box decision. For businesses with strict data protection requirements, the AI model can also be hosted locally.
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 lets you keep staff data on your own infrastructure, with no biometric time tracking and with UK GDPR and the Data Protection Act 2018 in view.
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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: The 48-hour week and rest periods, at a glance
Klacks automatically detects when an employee is approaching the 48-hour limit in the rolling 17-week average or a rest period under WTR Reg. 10 would fall short, and suggests the adjustment straight away — no manual recalculating required.
See Klacks in your business
Try the Playground to see how Klacks checks Working Time Regulations limits and rest periods and records working time without biometrics — installed on your premises or in the Playground, no license fees and with no registration required.
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