Indian-made drag sails that bring dead small satellites down on time
TL;DR Dragsail sells a bolt-on drag sail for small satellites. When a mission ends the sail opens, adds atmospheric drag and pulls the satellite down within a few years instead of decades. Indian satellite makers and operators pay per unit, plus a lifetime analysis that backs up their disposal plans.
India has committed to debris-free missions by 2030 for every Indian space actor, government or private. ISRO's version asks for a post-mission disposal success rate above 99%, with dead satellites brought down or moved to an orbit where they'll fall within five years[1].
That's hard for a small satellite with no propulsion, or one that fails before it can manoeuvre. And traffic is rising - ISRO counted 4,651 new objects added to orbit in 2025, and Indian satellites made 18 collision-avoidance manoeuvres that year[2].
Startups building the next wave of Indian satellites will have to show IN-SPACe a credible disposal plan, since it must follow international debris guidelines under the 2023 space policy[3].
What it does, in regulatory terms: a passive end-of-life disposal device and analysis service. Dragsail does not operate satellites, approach other objects or remove debris. The satellite operator stays responsible for authorisation and disposal compliance.
The product is a flat module, sized for CubeSats and satellites up to a few hundred kilograms, that bolts to one face. At end of life, or when a timer runs out because the satellite has gone quiet, booms unfold a thin sail. More drag means a faster fall. Alongside the hardware, Dragsail runs the orbital-lifetime numbers for each mission so the operator can show IN-SPACe when, and with what confidence, the satellite will come down.
I reframed the seed, which pitched fleets of robotic servicers clearing debris. That needs hundreds of crores and years of flight heritage, and an Indian servicing startup and ISRO are already working on servicing and capture[4][5]. A cheap device that stops new debris is a nearer, smaller sale.
Satellite makers pay when they build the craft, and operators pay through them. Early buyers are Indian startups and universities flying 10–200 kg satellites, followed by larger operators who want a backup in case propulsion fails. The main foreign product has no published price[6], so the unit price is mine to test against the cost of a launch slot.
DFSM went from announcement in April 2024 to implementation in mission planning from early 2025[1]. The ISSAR report for 2025, published in April 2026, put orbital crowding on the record with Indian numbers[2]. Private Indian satellites are now flying on POEM rides and, soon, on private rockets.
There's no public market figure for deorbit devices in India. The narrowest signal is policy - every Indian actor is covered by the 2030 goal[1], and ISRO tracked 53 operational Indian satellites in 2025[2], before the private wave.
Each new low-orbit smallsat without propulsion is a possible customer.
A US aerospace firm sells drag sails for CubeSats, smallsats and rocket stages[6]. In India the closest work is academic, such as one private university's deorbiter design[7]. The Indian servicing startup works on life extension and refuelling, which is a different job altogether[4].
I found no Indian company selling a flight-ready deorbit sail.
| Difficulty | Hard (57/100) |
| Starting capital | ₹3–6 Cr |
| Time to launch | 18–30 months |
The sail is simple in principle. Making it deploy reliably after years in orbit is a different story, and no customer will buy without flight heritage. Expect to fund your own demonstration flight and pass shock, vibration and vacuum tests before the first order, which is where a good chunk of that capital goes.
The sail needs no licence of its own, but your customers' authorisations lean on it.
Building this outside India? The categories above usually have a local equivalent, so check with your own regulator.
Don't trust AI-generated lifetime numbers without checking them against standard orbital analysis tools. Operators stake their authorisation on that figure.
Want to work out the AI layer for Dragsail? Talk to Yash →
Here's what can go south -
This is for a founder with spacecraft mechanisms experience and the patience for a long qualification cycle. If you need revenue in year one then don't go near it.
Prove first that three Indian satellite makers will sign a letter of intent conditional on a successful demonstration, and that IN-SPACe values a lifetime analysis in authorisation files.
Plan for roughly ₹3–6 Cr, with a good chunk going into qualification tests and your own demonstration flight.
The device needs no licence of its own. Your customers need IN-SPACe authorisation, and your own demo flight needs it too, along with frequency clearances.
Yes, a US aerospace firm already sells drag sails in the US. Space authorisation and export rules vary, so check yours before you sell abroad.
The free Dragsail validation kit has the line-by-line capital breakdown, the effort scoring, the debris-norm and authorisation checklist, a 14-day validation sprint with pass/fail targets, a 90-day launch plan, 10 interview questions for satellite makers, and 5 assumptions to test. Download the kit →
Thinking about building Dragsail or something close to it? The make-or-break work is funding a flight demonstration that gives buyers the heritage they ask for, and that's exactly the kind of plan I help founders put together. If you need a hand, you know where to find me. Talk to Yash →
For illustration only. Names are fictional and ideas hypothetical; sourced facts are real but may be out of date. Nothing here is legal, financial or professional advice, and Yash Khatri is not personally liable for any use of it. Read the full disclaimer.