Officials including Paris Deputy Mayor Jean-Louis Missika and Valerie Pecresse, head of the wider Ile-de-France region, met with representatives of firms based in the City, London's financial district.
Many banks and other firms are considering moving jobs from London once the UK leaves the 28-nation bloc and its single market in goods and services.
Frankfurt is also trying to woo companies away from Britain, but Pecresse says Paris has the advantage in culture and lifestyle. She asked reporters: "When was the last time you took your partner off for a weekend in Frankfurt?"
Some companies say France's robust labour protections and tough regulations are a deterrent, but Missika said "we have started to change our regulations".
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"We are here to show what Paris has to offer, we are also here to listen," he said.
Britain's Conservative government plans to trigger two years of EU exit talks by March 31, and says it wants to retain the closest possible trade ties with the bloc once it leaves.
Pro-EU lawmakers in Britain fear the government has made that impossible by insisting on a "hard Brexit" in which the UK leaves the EU single market and customs union in order to halt the free movement of people from other member states to Britain.
But lawmakers voted overwhelmingly to back the bill in its first House of Commons test last week, and it is unlikely many will change their minds when it comes up for vote again on Wednesday.
Prime Minister Theresa May said today that lawmakers should respect voters' choice to leave the EU.
"Our European partners now want to get on with the negotiations. So do I, and so does this House," she said.