The leading global inventory, reservation,
and ticketing system for public transport

S3 Passenger is a fully scalable and modular web-based platform, able to handle millions of transactions per day.
Sqills supports the public transport industry in becoming the customers’ preferred mode of transport.
Powerful and innovative to exceed your needs in the years to come, flexible enough through APIs
to connect with your existing infrastructure.

With more than 35 operators across 9 countries, we are just starting to develop our community
of users as S3 Passenger is the public transport industry’s system of choice.

Follow in the footsteps of leading operators such as SNCF, SJ, Eurostar, VIA Rail and choose S3 Passenger.

10.5 billion journey searches
85 ms response time
172.5 million passenger segments
89 Net promoter score

Unique Selling Points

  • Global leading SaaS reservation, inventory, ticketing, distribution product
  • Innovation and product evolution at its core, continuous product development to meet market expectations
  • New functionalities and updates constantly added (weekly releases)
  • Proven product mitigates operational risks
  • Cost efficient solution vs expensive bespoke software development and related maintenance and upgrades
  • Hands-on user training supported with over 10.000 pages of detailed functional and technical documentation
  • Powerful after sales functions such as service disruption management, rebooking, cancellations, and automated refunds help to restore customer satisfaction and save on operational costs
  • Wide range of API’s facilitating the integration in operator’s IT landscape
  • Strong customer involvement in product roadmap and prioritisation
  • Customers are pushing industry standardisation and interoperability

1 real time system 4 focus areas

  • Self-service. Provide operators' passengers easy and efficient self-services to create and change bookings

  • Best global system. Offers operators a powerful, flexible, and cutting edge-SaaS product to replace their legacy reservation systems and effectively battle for market share and customer preference

  • Collaboration. Leverage operator’s user experience and industry input in ongoing S3P innovations, to remain the public transport’s best in class and preferred product platform with several thousands out-of-the-box features and growing, every day

  • Quality, innovation, reliability and security are at the base of everything we do at Sqills

Customer Booking Flow Click to view more information Download product brochure

The S3P modules work together closely in a customer centric booking flow to guide customers through the ‘orientation’ phase. Customers select a journey with available inventory and products, choosing the price and conditions that match their preferences in the orientation phase.

This is followed by the ‘booking phase’ where the selection is converted to a reservation that can be completed or expanded with ancillary products and passenger information.

Finally the customer pays for the reservation, receives confirmation of the reservation, and their tickets are distributed. Activities are orchestrated by the S3P modules shown here:

Orientation phase

Booking phase

Retrieve travel options
Retrieve products
and prices
Store customer information (optional)
Fulfill purchased tickets
Retrieve availability
Create provisional booking + reserve seats
Register payment of
the booking
An S3 Passenger visual tour

We can imagine our comprehensive solution appears overwhelming. That's why we offer a brief visual tour to help you understand it even better...

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Constant evolution

Our industry, operator needs, and customer demands are constantly evolving, S3 Passenger can quickly adapt and evolve where needed to ensure that it meets current and future needs. Continuous deployment paired with SaaS means faster distribution, earlier access to new features to customer, smaller deliveries, and ensuring customers always have the latest bug fixes and improvements. In addition, current operators are involved in the evolution of the product through the User Story Marketplace.

Multi-channel distribution

  • The strength of S3P is represented by its core modules combined with sales and distribution API’s
  • All modules are managed through a single GUI back office environment (browser accessible), offering users an easy to use S3P platform.
  • Sales and distribution channel integration is facilitated with a standardised (and well-documented) set of API’s
  • Configurable prices, rules & conditions per distribution channel
  • Operators can create their own tailor-made (B2C) customer booking experience
  • S3P can be integrated with any client system based on web technology, mobile technology or other types of API driven (global) distribution channels such as ticket vending machines, station desk sales and B2B partner integrations.
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Latest updates
S3 Passenger is constantly evolving and improving, despite the fact that Sqills uses continuous deployment, these are a few of the key changes and highlights
Apr 2021
S3 Passenger 2021.04
Mar 2021
S3 Passenger 2021.03
Feb 2021
S3 Passenger 2021.02
Jan 2021
S3 Passenger 2021.01
Nov 2020
S3 Passenger 2020.7

Our customers

With a continuously growing list of S3 Passenger users, Sqills offers an internationally proven solution.


S3 Passenger 2021.04

The fourth group of updates for S3 Passenger in 2021 was no April's fools and brought a number of improvements in terms of booking creation, updates and cancellation and a new version of the Schedule change detection process.
  • New version of the Schedule change detection process;
  • New type of booking conflict in case the shift in departure and/or arrival times are significant;
  • Possible to see in the booking history that the schedule of services was updated after the booking was originally confirmed;
  • New push notification, that deals with the announcement of the creation, update or cancellation / expiry of provisional bookings or provisional items on already confirmed bookings.

S3 Passenger 2021.03

The third update of the year brought some interesting changes in terms of the parent-child relationship between a main product and one or several add-ons and improvements with the Aftersales Override profile.
  • Main products and add-on products can now be offered as a package deal by packaging their tariffs;
  • A parent-child tariff relationship will be created automatically during booking;
  • Aftersales Override profile supports multiple departure and arrival stations;
  • Complex changes to the seating algorithm.

S3 Passenger 2021.02

The second sequence of updates offers a number of different upgrades, many of them having to do with S3 Inventory and S3 Echo.
  • S3 Echo notifications after Bucket Update
  • Direct Booking Limit modifications via S3 Inventory
  • A more precise planning of when a batch re-accommodation job should start

S3 Passenger 2021.01

The first update of the year. Especially since the introduction of the latest / greatest versioning product suite versioning approach, these updates will provide a simple overview of the most impactful changes. There are changes in the
  • S3 Passenger now offers the possibility to sell multiple consecutive journey segments that offer different products in one booking;
  • A new booking horizon setting is introduced, booking horizon for service types;
  • A sales channel can be configured that repricing operations are not considered as after-sales operations;
  • In case of upgrading from a standard class seat reservation to a first class seat reservation and adding an add-on product during an upgrade after-sales operation to a booking with multiple segments, the add-on product will be added to that segment with non-cancelled items.

S3 Passenger 2020.7

This extraordinary year has come to an end. Covid-19 has changed the world and has had its impact on S3 Passenger as well. In this last release of the year, S3 Passenger introduces, amongst other things, features for pricing period strategies, extension of carriage restriction rules and agent payment profiles.
  • The Journey Search provides better support for “Required” interactions between tariffs that both belong to main products.
  • S3P added an additional business rule to offer bundles for a given product X that exclusively consist of tariffs that do not natively belong to that product X
  • Carriage restriction rules can be inherited from an equipment template or entered manually.
  • In the tariffs screen batch edit for “can be bundled with product” functionality is supported, making it easier to configure that functionality on a large range of tariffs at once.

SNCF selects S3 Passenger as their reservation platform

SNCF is the world’s second largest rail operator and already the 4th contract Sqills signed in 2021. Find out more about why SNCF selected S3 Passenger – the undisputed marketleader in inventory, reservation, and ticketing software.

Read more about it here