The Kolkata-class destroyers, also known Project 15A or Project 15 Alpha, is a class of three VLS-equipped stealth guided-missile destroyers constructed for the Indian Navy. The class comprises three ships – Kolkata, Kochi and Chennai, all of which were built by Mazagon Dock Limited (MDL) in India, and are the largest destroyers to be operated by the Indian Navy. Due to delays in construction and sea trials, the initial commissioning date of the first ship of the class was pushed back from 2010 to 2014.

The destroyers are a follow-on of the Project 15 Delhi-class destroyers, but are considerably more capable due to major improvements in the design, the addition of substantial land-attack capabilities, the fitting-out of modern sensors and weapons systems, and the expanded use of net-centric capability such as Cooperative Engagement Capability.

The Kolkata class share similar dimensions to the previous Delhi class, however they have 2,363 modifications which include major upgrades in weaponry, sensors and helicopter systems. With a standard displacement of 6,800 t (6,700 long tons; 7,500 short tons) and a full-load displacement of 7,400 t (7,300 long tons; 8,200 short tons), they are the largest destroyers ever operated by the Indian Navy. Some media reports have even given a full-load displacement of 7,500 t (7,400 long tons; 8,300 short tons). These are the first stealth destroyers built by India and marked a significant development in India's shipbuilding technology. The ships incorporate modern weapons and sensors, and have an advanced information warfare suite, an auxiliary control system with a sophisticated power distribution architecture, and modular crew quarters.

The class have a length of 163 m (534 ft 9 in), a beam of 17.4 m (57 ft 1 in) and a draught of 6.5 m (21 ft 4 in). The ship's power and propulsion features a combined gas and gas system utilizing four DT-59 reversible gas turbines. This configuration allows the ship to reach speeds in excess of 30 knots (56 km/h; 35 mph). Aviation facilities include a large flight deck, which was re-designed to handle larger helicopters than the Delhi class, and an enclosed hangar for up to two maritime helicopters.

The primary radar sensor of the class is the EL/M-2248 MF-STAR multi-mission AESA. It is also equipped with Thales LW-08 long range volume search radar. Thales LW-08 will later be replaced by Indra - TASL Lanza-N L-band air surveillance radar.

The ship's main air-defence armament is composed of four eight-cell vertical launching systems (VLS) allowing for up to thirty-two Barak 8 / MRSAM air defence missiles.

The class is designed for network-centric warfare such as Cooperative Engagement Capability, where they operate wide-area air defense, distributing assets and control over different platforms and locations, and harnessing multiple sensors & effectors into a single air defense system. In May 2019, 2 ships of the class conducted the maiden cooperative engagement firing of the Barak 8 / MRSAM by using the Joint Taskforce Coordination (JTC) mode to intercept several simultaneous aerial targets involving two complex scenarios at extended ranges. With it, the Indian Navy became the second naval service in the world after the United States, and the first in Asia to have developed and deployed it. The capability is to be rolled out on all future major warships of the Indian Navy.

Four AK-630 CIWSs are fitted for close-in defence.^{[citation needed]}