  We address the notorious metastability of the standard model (SM) and promote
it to a model building task: What are the new ingredients required to stabilize
the SM up to the Planck scale without encountering subplanckian Landau poles?
Using the SM extended by vector-like fermions (VLFs), we chart out the
corresponding landscape of Higgs stability. We find that the gauge portal
mechanism, triggered by new SM charge carriers, opens up sizeable room for
stability in a minimally invasive manner. We also find models with Higgs
criticality, and Yukawa portals opening up at stronger coupling. Several models
allow for VLFs in the TeV-range, which can be searched for at the LHC. For
nontrivial flavor structure severe flavor-changing neutral current constraints
arise which complement those from stability, and push lower fermion masses up
to $\mathcal{O}(10^3\,\text{TeV})$.
