High technology (high tech), also known as advanced technology (advanced tech) or exotechnology, is technology that is at the cutting edge: the highest form of technology available. It can be defined as either the most complex or the newest technology on the market. The opposite of high tech is low technology, referring to simple, often traditional or mechanical technology; for example, a slide rule is a low-tech calculating device. When high tech becomes old, it becomes low tech, for example vacuum tube electronics.

Startups working on high technologies (or developing new high technologies) are sometimes referred to as deep tech; the term may also refer to disruptive innovations or those based on scientific discoveries.

High-tech, as opposed to high-touch, may refer to self-service experiences that do not require human interaction.