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100+ public transport authorities and 600+ companies trust the No. 1 carpool operator in Europe
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Karos : Europe's specialist for daily commuting carpooling
Cities, regions and public transport operators face the same challenges: rising demand, limited resources, and growing expectations to deliver mobility that is both sustainable and affordable. This is what daily carpooling provides, when fully integrated into public transport networks.
100+
Public authority partners
144 M €
Buying power generated
500k+
Monthly shared rides
From city centers to rural areas: we connect commuting routes
Daily carpooling fills gaps in your public transport network and integrate seamlessly into your mobility ecosystem.
Close mobility gaps across urban and rural areas
Improve access to jobs and key locations
Reduce commuter traffic and CO₂ emissions
Lower commuting costs for residents and employers
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Expand your mobility offer at lower cost
Carpooling makes use of what's already there: private cars, empty seats and everyday commuting routes. Extend your mobility coverage without new infrastructure.
Use existing transport capacity instead of adding new infrastructure
Extend coverage cost-efficiently in rural areas, business parks and off-peak hours
Complement public transport where fixed routes are expensive to operate
Measure impact through trips, coverage and cost per passenger-kilometre
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Companies in our region were struggling to recruit because of mobility issues. Today, we have a solution to offer them, especially since Karos takes care of promoting the service directly within companies.
Alain Scudellaro
Vice-President of the Communauté de communes de la Lomagne Gersoise
Carpooling combines financial relief with climate action: by creating our own carpooling service in the Frontonnais, we enable residents to achieve significant savings while reducing their carbon footprint.
Hugo Cavagnac
President of the Communauté de communes du Frontonnais
People can choose how they travel rather than having their journeys dictated by circumstance. At the same time, carpooling provides mobility in areas where a bus service would not be efficient.
Grégoire de Lasteyrie
Vice-President of Île-de-France Mobilités
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Our ambition is simple: to offer people working in our region a practical, affordable and environmentally friendly way to get to work. A resident commuting every day from Saint-Rémy-de-Provence to Avignon who chooses to carpool as a passenger can save around €1,300 per year on fuel alone. The benefits are very tangible: lower costs for residents, fewer cars on our roads and greater solidarity across our region.
Romain Thomas
President of the Communauté de communes Vallée des Baux-Alpilles
In some parts of our region, expanding the bus network is relatively straightforward. At the same time, other areas are very rural and sparsely populated. There, Karos complements the existing bus network.
Jérôme Dubois
Vice-President of Durance-Luberon-Verdon Agglomération
Transport connectivity at the GENDORF Chemical Park has long been an important issue for our site. With Karos (formerly goFLUX), we were able to create an accessible and flexible mobility solution for everyone working at the chemical park. We see the app as a valuable complement to public transport: it is even more flexible than a bus route, as colleagues travel the same commuting routes at many different times. That is why we can also recommend the solution to other companies in the region.
Alfred Sandner
Project Manager, InfraServ Gendorf
Our main goal was to give employees and apprentices from rural areas a reliable way to reach the chemical park. At the same time, we learned that a good mobility offer alone is not enough: personal engagement, on-site activations and continuous communication with employees are key.
Michaela Dufter
InfraServ Gendorf
For us, it is essential to future-proof our site while ensuring that all employees are part of the journey. The carpooling solution combines sustainability with tangible benefits for our employees: it helps ease parking pressure while fostering interaction and stronger connections across the workforce.
Andra Seidler
Transformation Manager at Siemens Switchgear Plant Frankfurt
One of the most important insights for us is that incentives significantly ease entry: they motivate people to try the app and actively connect with each other. This is crucial because without active usage there is no community – and without a community, new users cannot find a network to join. At the same time, we see a clear behavioural change: people who previously travelled alone are now more often forming car‑pooling groups because the app makes ride‑sharing easier and more attractive.
Brainport Bereikbaar
Local mobility broker and project partner in the Netherlands
Most of the kilometres we travel are for commuting, and the transport mode with the highest person‑kilometres in Germany is – the unused car seat. [...] We need complementary building blocks for the transformation of the transport sector: a functioning public transport system for short and long distances, physically separated bike lanes, and, yes, also the car – preferably fully occupied. And those who, on this path, also engage in conversation with their neighbours contribute not only to the mobile and energy transition but to something greater: a liveable future in a good neighbourhood.
Prof. Dr. Helge Stein
Im Rahmen seiner Festrede beim 44. KS Energie- und Umweltpreis und der Auszeichnung von u.a. Karos Mobility in der Kategorie Mobilitätssysteme
Die App ist lediglich ein Werkzeug, um aus individueller Mobilität gemeinschaftlich organisierte Mobilität zu machen. Die Ergebnisse zeigen: Es funktioniert! Was als Pilotprojekt [im Ilm-Kreis] begonnen hat, ist innerhalb kurzer Zeit zu einem funktionierenden Mobilitätsangebot geworden. [...] Mobilität ist nicht ausschließlich Aufgabe von Staat, Verkehrsverbünden und Infrastrukturbetreibern. Mobilität entsteht auch dort, wo Unternehmen Verantwortung für die Wege ihrer Beschäftigten übernehmen und gemeinsam mit Kommunen praktikable Lösungen entwickeln.
Prof. Stefanie Bremer
Jurymitglied und Laudatorin beim 44. KS Energie- und Umweltpreis im Rahmen der Auszeichnung von Karos Mobility in der Kategorie Mobilitätssysteme
With Karos [ehem. goFLUX], we have a partner that provides an innovative component […] and continues to develop it together with us. Karos is far more than a service provider: it acts as a problem solver, thought partner and trusted advisor.
Denis Bischof
Stadtwerke Bonn GmbH,
Head of Business Development and Projects
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We are delighted to see SWB-Mitfahren delivering such strong results. What began in Bonn as an innovative partnership is becoming a model for cities and employers across Germany. In areas where buses and trains do not operate, or outside regular service hours, it is essential to offer people a flexible mobility option while reducing car traffic at the same time. Carpooling can make an important contribution to cutting CO₂ emissions.
Anja Wenmakers
Managing director of SWB Bus und Bahn / copyright picture: SWB/Marcus Müller Saran
Many of our long-serving employees commute up to 70 kilometres to N3 Engine Overhaul Services. It was important to us to support our team in this area. Carpooling helps reduce fuel costs and makes us a more attractive and accessible employer for new colleagues who do not have a suitable public transport connection.
Stefan Landes
Managing Director N3 Engine Overhaul Services
An integrated system: app and reporting platform
Everything you need for reporting and fact-based project management, all in one place, accessible at any time.
Frequently asked questions
Karos enables public authorities and employers to structure daily carpooling as a reliable mobility solution, fully complementary to public transport and designed to operate at territorial scale.
How quickly can we launch a pilot project?
A pilot can typically be launched within a few months, depending on the scope and local coordination. Our team handles the digital setup and supports communication, so the service can start activating commuter flows quickly, as demonstrated in our flagship deployments.
How do you measure and report the impact of a carpooling programme?
We provide a real-time reporting platform with key indicators such as number of shared rides, registered members, kilometres saved and estimated CO2 reduction. This gives public authorities transparent, evidence-based data to evaluate the programme and report to stakeholders.
How does Karos integrate with our existing public transport network?
Karos is designed to complement, not replace, your existing transport network. We integrate daily carpooling as an additional layer that connects underserved areas to existing rail and bus lines, activating unused seats in private cars. This extends the reach of your public transport system without requiring new infrastructure.
Can the carpooling service be customised to our territory's identity?
Yes. We can deploy a mobile application in the colours of your territory, with your branding and local information. This helps residents identify the service as part of their own public mobility offer rather than a generic third-party app.
What funding or subsidy models can we use to support carpooling?
Local authorities can subsidise rides to make carpooling attractive for residents, often funding a small per-trip incentive for drivers. Karos helps you design a model adapted to your budget and mobility goals, and provides the reporting needed to track public spending against measurable outcomes.
Let’s get in touch
Reduce commuting traffic and emissions
Improve access to jobs and key locations
Track results with live KPIs and impact reporting