3D microprinting, also known as micro-scale printing, is a micro-fabrication technique that allows the design of very small sizes, at the micrometer scale and below. Particularly popular in the electronics industry, it is growing steadily, with more solutions available on the market. Micro 3D printers are therefore able to deposit successive layers of material to form a part that is both tiny and highly detailed. In addition to the electronics sector, where they are used to miniaturize devices, these machines are increasingly used in the health and optical sectors. This is a review of the 3D microprinters on the market, whether they are based on resins, powders or glass.