Both are offered as "regenerative" add-ons to microneedling and both are cell-derived. Beyond that, they are quite different products.
How each is made
Platelet-rich plasma is made in the clinic from the patient's own blood. Blood is drawn, spun in a centrifuge to concentrate platelets, and the platelet-rich fraction is applied or injected within minutes. The active ingredients are the growth factors the platelets release when activated.
Exosome preparations are made in a manufacturing facility from cultured donor cells. The vesicles are isolated from the culture fluid, purified, characterised and either freeze-dried or stabilised in liquid, then shipped to the clinic.
What each contains
PRP contains platelets, plasma proteins and, depending on the preparation, some white blood cells. On activation the platelets release a burst of growth factors including PDGF, TGF-beta and VEGF. It also contains platelet-derived vesicles, though these are not standardised or measured.
An MSC-derived exosome preparation contains vesicles carrying a defined set of proteins and microRNAs from the source cells. It contains no cells, no plasma and no platelets. Its composition is determined by the cell source and manufacturing process rather than by the patient.
Consistency
This is the main practical difference. PRP varies with the patient's age, health, hydration, medications and the centrifuge protocol; two patients, or the same patient on two days, do not get the same product. A manufactured exosome product is the same from vial to vial within a lot, and a good supplier will show you lot-to-lot data. That consistency is why some clinics have moved from PRP to exosomes for post-procedure use.
Regulation and route
PRP is autologous, meaning it comes from and returns to the same person, and is widely used by injection under existing rules. Exosome products in the United States are cosmetic-grade for topical use; injecting them is not approved. If your protocol requires injection, PRP remains the option with a regulatory pathway.
Cost and logistics
PRP needs a blood draw, a centrifuge and staff time on the day, with no product cost beyond consumables. Exosomes have a per-vial cost and need cold storage, but no draw and no processing. Many practices find that the time saved and the more predictable patient experience offset the product cost for topical protocols.
Where each fits
Use PRP where injection is part of the plan or where a patient prefers an autologous product. Use exosomes for topical post-procedure care where consistency and convenience matter. Some clinics use both. Neither replaces the procedure it is paired with, and neither is a treatment for disease.