What is another word for

proven

Name: Working with Strategically has been an amazing experience. They are professional, hard-working, and extremely dedicated. I wouldn’t hesitate to recommend.
Item: Strategically Digital Marketing Ltd
Rating: 5
Author: WebsitePlanet

proven as in established beyond doubt

"a proven liar"
"a Soviet leader of proven shrewdness"

Synonyms

provedestablished beyond doubt