About us

We are innovators in
international trade security
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Leveraging more than 10 years of R&D in data fusion, we provide best-in-class technological platform tackling international trade security challenges.

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Our vision

The rapid growth in the global economy has made international trade a key stake for various actors. But international trade implies complex logistics flows with a real difficulty to get a real-time overview of the status of goods that are being transported.

This situation is not comfortable for all companies whose value is based on international bought-in goods and supplies. Conversely, the opacity of international trade facilitates trafficking in all its forms: money laundering, terrorism financing and evading sanctions regulations or other restrictions.

In this context, our purpose is to collect and analyse relevant data to analyse and secure international trade transactions in order to guarantee their original soundness.

Lestr is delivered by Semsoft, a high tech company leveraging more than 10 years of R&D with INRIA and Orsay University in the realms of Big Data and semantic web technologies.
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Who we are

Lestr – pronounced Lester – is Semsoft solution created to help its customers mitigate risks related to international trade transactions.

Founded in 2009 by François Paulus, Semsoft is a software editor leveraging more than 10 years of R&D in the realms of semantic web technologies to automate data fusion from multiple sources. Its purpose is to turn the Big Data promises into operational concrete benefits for its customers.

Lestr started as an HSBC project to reduce the time spent to check international trade transactions and to improve its capabilities to detect and prevent financial crimes. Lestr is today used by several major banks and law enforcement agencies.

Lestr brings together a multidisciplinary team of Semsoft employees and their number is only growing! Semsoft is based in Rennes, Brittany, a region historically related to maritime trade.


We work on a daily basis to turn suspicious situations or proven cases of fraud or trafficking into risk indicators or effective controls so that we can prevent and detect them.

For this to happen, we analyse all disclosed criminal and fraudulent practices in order to identify all the elements allowing to bring them to light.

We see ourselves as investigators and use our recognised expertise in data fusion and cross-checking to track illicit activities operated under the guise of international trade.

Lestr is the result of this approach.
Lestr relies on a recognised technology of data fusion to revolutionise the way to prevent, detect and manage risks inherent to international trade.
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Ready to start securing your
trade operations smarter ?

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Semsoft SAS – 14 C rue Patis Tatelin – 35700 Rennes – France – Phone +33 2 99 12 19 86
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