Smart inorganic polymers (SIPs) are inorganic polymers with tunable (smart) properties such as stimuli responsive physical properties (shape, conductivity, rheology). While organic polymers are often petrol-based, the backbone of SIPs is made from elements other than carbon which lessens the burden on scarce non-renewable resources or even provide alternatives to them (sustainability). Discoveries in the past decades revealed the potential of inorganic polymers for broad applicability in diverse fields.[1][2][3] Inorganic polymers may provide greater consumer safety owing to improved properties and environmental compatibility (no need for plasticizers, intrinsically flame-retardant properties), technological and economic advancement (solid polymer electrolytes for consumer electronics based on polymers with a low glass-transition temperature), molecular electronics with non-metal elements as improvement and replacement for metal-based conductors and electronic circuits. Recent developments in the field of Smart Inorganic Polymers have been summarized in a themed collection in the scientific journal Chemical Society Reviews.[4]