Macron's accusation was made when Moldova's President Maia Sandu visited Paris on Monday.
Sandu was sworn in as president for a second term in the former Soviet republic, but the election was marred, according to observers, by attempts from Moscow to influence the outcome.
We have decided to once again strengthen our cooperation to strengthen Moldova's resilience to foreign influence, said Macron.
The two heads of state signed an agreement on cooperation to detect and stop digital disinformation campaigns at the Élysée Palace.
Moldova borders Ukraine and lives under the threat of Russian aggression being directed against the country.