No. Private messaging goes against Scratch's model of having all site activity public. This has been suggested and rejected several times.

Private messaging is a feature frequently suggested by numerous Scratchers. This feature has been consistently rejected by the Scratch Team because of moderation issues, and it has been stated multiple times that the Scratch Team will not implement it.[1][2]


Alternatives

Alternatives to a PMing feature include other instant messaging services, calling, texting, or emails; however, giving away contact information or linking to unmoderated chat on Scratch is a violation of the Community Guidelines. The Scratch Team has encouraged users to report instances of this.

See Also

References