  We propose a scenario with string theory in the deep ultraviolet, an
intermediate asymptotically safe scaling regime for gravity and matter, and the
Standard Model in the infrared. This could provide a new perspective to tackle
challenges of the two models: For instance, the gravitational Renormalization
Group flow could connect a negative microscopic to a positive macroscopic
cosmological constant, potentially rendering string theory on an anti-de Sitter
background observationally viable. Further, the unitarity of a string-theoretic
ultraviolet completion could be inherited by an asymptotically safe fixed
point, despite the presence of higher-order interactions. We discuss necessary
conditions on the scale of asymptotic safety and the string scale for our
scenario to be viable. As a first test, we explore the weak-gravity conjecture
in the context of asymptotically safe gravity.
