FDM is the most widely available 3D printing process, mainly used for low-cost prototyping and design verification with very fast turn around times.
SLA is most suitable for visual applications where an injection mold-like, smooth surface finish, and a high level of feature detail are required.
Polyjet produces parts of the highest dimensional accuracy with very smooth surface finish, used for visual prototypes.
SLS is used for both prototyping and small-batch production of functional plastic parts with good mechanical properties.
HP’s Multi Jet Fusion (MJF) can be used for both prototyping and small-batch-production of functional plastic parts.
DMLS produces high performance, end-use metal 3D printed parts for industrial applications in the aerospace, automotive and medical industries.