Russia Offers Su-57E Stealth Fighter with Source Code Access to India
In a dramatic move that could reshape India’s future air combat capabilities, Russia has proposed to supply its most advanced fifth-generation stealth fighter, the Su-57E, to India—along with full access to its source code. The offer, made on June 4, 2025, by Russia’s United Aircraft Corporation, has caught the attention of India’s defence and strategic circles, especially due to its unmatched level of technological transparency. If accepted, the deal would allow India to embed its own home-grown systems into the fighter, from mission computers to indigenous weapons, in alignment with the country’s "Atmanirbhar Bharat" and "Make in India" initiatives.
This development comes at a crucial time as New Delhi weighs its options for next-generation fighters, with the United States pushing its F-35A as a counter-offer. However, U.S. and European platforms have typically been rigid in allowing Indian-designed modifications due to restrictions on source code and deep system access. In contrast, Russia’s willingness to share the Su-57E’s software architecture marks a significant break from traditional arms export practices, giving India an opportunity to fully integrate its own technologies and weapons.
The Su-57E, developed by Sukhoi and produced by UAC, is Russia’s flagship stealth fighter for the export market. Designed with features like low radar visibility, supercruise capability, and advanced sensor fusion, it is a direct response to American and Chinese fifth-generation fighters such as the F-22, F-35, and J-20. The export variant offered to India will include a cutting-edge AESA radar built with Gallium Nitride technology and an Indian-developed mission computer, creating deeper synergy with India’s ongoing upgrades to the Su-30MKI fleet under the Super-30 program.
A key advantage lies in the Su-57E’s compatibility with Indian weaponry. This fighter could seamlessly carry Indian-developed missiles like the Astra Mk1 and Mk2, Rudram anti-radiation missiles, and various home-grown precision-guided bombs. That reduces India's reliance on foreign weapons systems and allows more control over maintenance and future upgrades. Compared to India’s current fleet of French Rafale jets, where lack of source code access has limited deeper Indian customisation, Russia’s offer stands out for its flexibility and long-term value.
Historically, India and Russia attempted a similar joint effort under the Fifth Generation Fighter Aircraft (FGFA) project, which eventually fell through. However, the new Su-57E offer comes with improved alignment to India’s defence goals, allowing the country to co-produce and co-develop without compromising on control and sovereignty.
From a strategic viewpoint, the offer arrives as India faces mounting security challenges in the Indo-Pacific, including the rise of China’s stealth-capable J-20 fighter fleet. Having an Indian-customized Su-57E could balance the equation, giving the Indian Air Force a potent counter in both technology and numbers. On the Russian side, this potential deal opens a critical export channel during a time when sanctions and isolation from Western markets have pressured Moscow to diversify its defence customers.
Though no official contract has been signed yet, reports suggest that serious negotiations are underway. Hindustan Aeronautics Limited (HAL) and several Indian private companies are being considered for co-production, which would strengthen domestic aerospace manufacturing. If the deal moves forward, India would become the most important export customer for the Su-57E, surpassing even Algeria, which has also shown interest in the aircraft.
In conclusion, Russia’s offer to India is not just about selling a fighter jet—it represents a deeper strategic partnership, a shift in the global defence landscape, and a potential leap in India's journey toward self-reliance in aerospace and defence.
