IIT Delhi Spin-Out IndigoTex Raises ₹5 Crore to Take Waterless Wool Finishing From Lab to Factory
IIT Delhi spin-out IndigoTex has raised ₹5 crore led by IAN Angel Fund, with SIDBI, FITT and IIT Delhi Angels, to build a Sonipat plant for its waterless wool finishing technology and launch IndiWool Denim and washable wool fabrics.
Textiles are rarely filed under deep tech, but the chemistry and process engineering behind how fabric is finished — and how much water and energy that takes — is a materials-science problem. IndigoTex, a start-up spun out of IIT Delhi, has raised ₹5 crore to commercialise its answer.
The round, reported on 6–7 October 2026, was led by IAN Angel Fund, with participation from SIDBI, FITT (IIT Delhi's Foundation for Innovation and Technology Transfer) and IIT Delhi Angels.
What IndigoTex makes
IndigoTex was founded in February 2024 by Satendra Singh, its CEO, together with Prof. B.S. Butola of IIT Delhi and Dilip Singh. Satendra Singh began working on the technology during his master's research at IIT Delhi under Prof. Butola.
The company describes itself as a deep-tech textile start-up developing waterless textile processing and finishing technologies, alongside high-performance wool and technical-textile products. Its lead products are:
- IndiWool Denim — a fabric that combines the durability and look of denim with the warmth and comfort of wool. According to a company interview, the idea came from Prof. Butola's experience of wearing cotton denim in freezing temperatures on a family trip to Ladakh.
- Washable wool and poly-wool fabrics — wool that can be laundered without the shrinkage and felting that normally require careful hand-washing or dry cleaning.
Conventional wool finishing — the treatments that make wool shrink-resistant and machine-washable — typically involves wet chemical processes that consume significant volumes of water and generate effluent. A waterless route addresses both cost and environmental pressure on mills, particularly as global brands tighten supply-chain sustainability requirements.
Use of funds
IndigoTex says the money will go towards:
- setting up its manufacturing and finishing facility at Rai Industrial Area in Sonipat, Haryana;
- expanding its sales and operations team;
- commercialising IndiWool Denim and its washable wool and poly-wool fabrics;
- further R&D and product certifications.
Research will remain at IIT Delhi's Research and Innovation Park. Reports also say the company has signed non-disclosure agreements with Ralph Lauren and France's Kering Group and is in discussions with other premium brands; these are company statements and do not indicate orders.
Why it matters
India is one of the world's largest textile producers and exporters, and the industry is a major employer. But much of the value in high-performance and sustainable fabrics sits with process technologies developed elsewhere. A university spin-out that owns a finishing process — rather than a fabric design — is a small example of Indian research moving into the part of the value chain where margins are higher.
Funding for this kind of company has traditionally been hard to find. Venture investors tend to favour software or high-profile hardware such as chips and satellites, while textile mills are reluctant to bet on unproven processes. Angel networks with a deep-tech mandate, together with institutional backers attached to universities, have stepped into that gap for early-stage manufacturing ventures, and a ₹5 crore cheque is sized to fund a first plant rather than a national roll-out.
The investor mix is also telling. SIDBI's participation reflects the government's interest in manufacturing-led start-ups, while FITT and IIT Delhi Angels represent the institutional support system that has grown around India's top technical institutes. IIT Delhi spin-outs have been more visible in semiconductors and energy; IndigoTex shows the same pipeline working in a traditional sector.
The next test is manufacturing. Moving from lab-scale finishing to consistent, certified output at a Sonipat plant — at a cost that mills and brands will accept — is where the technology will either prove itself or not.
Sources
- Entrackr — https://entrackr.com/snippets/ian-angel-fund-leads-rs-5-cr-round-in-deeptech-textile-startup-indigotex-12628381
- Indian Startup News — https://indianstartupnews.com/funding/waterless-wool-finishing-technology-startup-indigotex-raises-rs-5-crore-from-ian-angel-fund-12633657
- SiliconIndia — https://startup.siliconindia.com/startup-funding/indigotex-raises-rs-5-crore-in-funding-led-by-ian-angel-fund-nwid-55598.html
- InFashion Business — https://infashionbusiness.com/home/news_details/8663/9
- Apparel Resources — https://apparelresources.com/business-news/manufacturing/indigotex-raises-rs-5-crore-scale-textile-manufacturing-rd/
- IndianWeb2 — https://www.indianweb2.com/2026/10/ian-angel-fund-backs-indigotex-with-5.html
- Fibre2Fashion (interview with Satendra Singh) — https://www.fibre2fashion.com/interviews/industry-speak/indigotex/satendra-singh/14463
- YourStory daily roundup, 6 October 2026 — https://yourstory.com/2026/10/startup-news-and-updates-daily-roundup-october-6-2026
- IndigoTex — https://indigotex.in/about.html