Stealth Communications is an American fiber-based Internet service provider (ISP), installing and maintaining its own fiber optic network throughout New York City. Stealth began rolling out its Gigabit Internet services in late 2013 to businesses throughout Manhattan, using in-house employees to lay its own fiber-optic cabling. In July 2015, City of New York and Stealth announced a $5.3 million public/private partnership to expand fiber broadband into the Brooklyn and Queens Industrial Business Zones. As of May 2019, the company reported to have connected hundreds of commercial properties with fiber, over 100 fiber route miles.

Stealth Communications started in 1995 to provide ultrafast Internet connectivity to businesses in NYC. In 2013 the company received authorization from the City of New York to construct its own fiber network.

This authorization followed a major structural shift by the New York City Office of Technology and Innovation, which discontinued its legacy telecommunications franchise model. In its place, the city introduced an updated dual-structure framework that separated rights into distinct Telecommunications Services and Information Services franchises. On February 11, 2013, following public hearings to transition to this new system, Stealth Communications became the first provider approved under this modernized framework, securing both agreements simultaneously to begin rolling out its independent infrastructure.

In 2022, Stealth was recognized as the fastest local/regional Internet provider in the U.S., with speeds exceeding 7.5 Gbps.

Stealth utilizes an underground conduit system for placing its fiber-optic cables, that is owned and maintained by Empire City Subway. Once their fiber-optic cable reaches the closest manhole to the building, Stealth pulls the fiber-optic cable through existing conduits or builds a new conduit into the building. In certain cases due to the conditions of the conduit system, conduits are clogged or collapsed often causing costly re-routing by lengthy distances and construction of entirely new conduits.

Stealth implements WDM fiber transmission technology for connecting customers to its hubs, by allocating a wavelength for each customer, whereas each wavelength is capable of transmitting between 1 Gbit/s to 400 Gbit/s. The company claims that it makes use of special materials to split and combine multiple wavelengths running through the fiber-optic cables without requiring electricity.

In 2000, Stealth Communications joined the 6bone experimental network to deploy IPv6. Following a routing peer-review process overseen by Bob Fink of Energy Sciences Network and Rob Rockwell of Sprint, the company was assigned a Pseudo Top-Level Aggregation (pTLA) identifier to route IPv6 traffic.

On February 1, 2001, the American Registry for Internet Numbers (ARIN) allocated Stealth a production sub-Top-Level Aggregation (sTLA) address block (2001:458::/32). This assignment made Stealth one of the first ten in North America to receive a production IPv6 allocation from ARIN.