The city functions as the corporate headquarters for the vast majority of Iran's major domestic industries and modern tech startups.
* **Automotive:** Iran Khodro and SAIPA, two of the largest car manufacturers in the Middle East, are headquartered here. * **Energy:** The National Iranian Oil Company (NIOC), central to the nation's economy, operates from its central Tehran headquarters. * **Tech & E-commerce:** Snapp! (the leading ride-hailing app) and Digikala (the largest e-commerce platform in the country) represent the city's massive tech presence. * **Telecommunications:** MCI (Mobile Telecommunication Company of Iran) and Irancell manage the nation's mobile networks from the capital.