The number of subscribers to Charlie Hebdo, which was hit by a deadly jihadist attack last month, has risen from 10,000 before the assault to more than 200,000, the magazine’s co-manager said Tuesday.

After terrorists’ bullets tore through the staff of France’s satirical magazine Charlie Hebdo magazine 10 years ago, the people of France spoke with one voice: “Je suis Charlie.” In the days since an ...