String Bio
String Bio is a Bengaluru-based biotech company that uses proprietary gas fermentation to convert methane into protein feed ingredients, biostimulants, and sustainable biochemicals, serving animal nutrition, human nutrition, agriculture, and personal care markets globally.
- Company typePrivate
- Founded2013
- HeadquartersBangalore, India
- Headcount51–100
- GTM typeB2B
- OfferingHardware or Manufacturing
What String Bio does
String Bio Private Limited is a Bengaluru-based biotechnology company founded in 2013 that operates a proprietary gas fermentation platform to convert methane and other greenhouse gases into protein-rich ingredients and biochemicals. The company's core technology integrates synthetic biology, chemistry, process engineering, and fermentation to produce Single Cell Protein (SCP) from Methylococcus species via methane fermentation, yielding products with greater than 70% crude protein content. The platform has been scaled from laboratory to demonstration to pilot to commercial-scale production.
The company commercializes products across four verticals: Animal Nutrition (PRO-DG protein feed ingredient and PROmeium immunomodulator for aquafeed, poultry, swine, and pet food), Human Nutrition (fermented protein ingredients for food manufacturing and supplements), Agriculture (CleanRise and Impakt biostimulants delivering reported 20-30% yield improvements), and Personal Care/Packaging (methane-derived cosmetic peptides and biodegradable monomer molecules). Customers include major aquafeed companies BioMar and Skretting Australia, Indian poultry leader Srinivasa Farms, and farming cooperatives in India.
String Bio generates revenue through B2B one-time/license-style sales of protein ingredients and biostimulants to enterprise feed manufacturers, food companies, and agricultural distributors, with pricing undisclosed and trial programs offered via the company website. The company employs 51-100 people, has raised $20 million in a July 2022 Series B led by Woodside Energy Group (which also signed a strategic development agreement for methane recycling at industrial facilities), and operates across India, Australia, Singapore, France, and the UAE. Early investors include Ankur Capital and Kitven Fund; the company has accumulated multiple industry awards including World Economic Forum Technology Pioneer 2024.
String Bio firmographics
Firmographics- Name
- String Bio
- Legal name
- String Bio Private Limited
- Website
- https://stringbio.com
- Company type
- Private
- Founded year
- 2013
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- String Bio is a Bengaluru-based biotech company that uses proprietary gas fermentation to convert methane into protein feed ingredients, biostimulants, and sustainable biochemicals, serving animal nutrition, human nutrition, agriculture, and personal care markets globally.
- Ownership category
- akta.pro rank
String Bio industry classification
Industry- Product category
- Industrial Biotechnology / Alternative Protein Ingredients
- NAICS
- Food Manufacturing (311)
- SIC
- Food And Kindred Products (2000), Miscellaneous Food Preparations & Kindred Products (2090)
- akta.pro primary industry
- Proteins & Functional Nutrition Ingredients (Plant/Animal Proteins, Collagen, Amino Acids) (CRADAOAJ)
- akta.pro secondary industries
- Swine Specialty/Functional Feed (Gut Health, Probiotics, Acidifiers, Enzymes) (AFADABAI), Yeast Products & Fermentation Metabolites (Yeast Culture, MOS/β-Glucans) (AFADALAM), Cultures, Probiotics & Fermentation Ingredients (Starter Cultures, Yeast, Adjuncts) (CRADAOAI)
Keywords
Where String Bio is headquartered
LocationHeadquarters
- HQ city
- Bangalore
- HQ country
- India
- HQ region
- Asia
Offices1 record
Markets served
String Bio business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Operations, Personnel, Supply Chain, Marketing or Sales
Revenue model
- Animal Nutrition Products: Sale of protein-based feed ingredients (PRO-DG, PROmeium) to animal nutrition companies including aquafeed, poultry, swine, and pet food manufacturers. Products are sold directly to feed companies and farmers based on product performance and proven ROI.
- Agricultural Biostimulants: Sale of methane-derived biostimulant products (CleanRise, Impakt) to farmers and agricultural sector. Products are complementary to crop nutrition inputs and provide measurable yield improvements.
- Human Nutrition Ingredients: Fermented proteins and protein-based ingredients sold as clean and traceable replacement to plant and animal sources for food manufacturing applications.
- Personal Care Ingredients: Methane-derived functional peptides and chemical moieties for cosmetic sector, as well as monomer molecules for sustainable packaging applications.
Go-to-market motion2 records
Distribution channels4 records
Marketing channels6 records
String Bio product offering
Product offeringCore offering
String Bio operates a proprietary methane gas fermentation platform that converts methane (a greenhouse gas) into protein-based ingredients, biostimulants, and biochemicals for industrial use. The company manufactures and sells four product categories: Animal Nutrition products (PRO-DG protein feed ingredient, PROmeium immunomodulator), Agriculture biostimulants (CleanRise, Impakt), Human Nutrition fermented protein ingredients, and Emerging Markets ingredients (cosmetic peptides, biodegradable packaging monomers). Products are sold B2B to feed manufacturers, food companies, farmers, and personal care ingredient buyers.
Product overview
String Bio operates as a biotechnology company offering a portfolio of products across four verticals: Animal Nutrition (PRO-DG, PROmeium), Human Nutrition (fermented protein ingredients), Agriculture (CleanRise, Impakt biostimulants), and Emerging Markets (cosmetic ingredients and biodegradable packaging). The company is built on a proprietary gas fermentation platform that converts methane—a potent greenhouse gas—into protein-based solutions and biochemicals. The platform enables scalable manufacturing of alternative proteins and bio-based ingredients, positioning String Bio as an integrated solution provider for sustainable nutrition and ingredient markets.
Differentiator
Problem solved
Functional benefit
Brands
- PROmeium: Next generation immunomodulator for animal health which increases stress tolerance and improves health status.
- PRO-DG
- CleanRise
- Impakt
Products and services
- PRO-DG High-quality protein feed ingredient with uniform product quality, ideal amino acid profile, low fat content, and optimal mineral composition for animal nutrition applications including aquafeed, poultry feed, swine feed, and pet food.
- PROmeium Next-generation immunomodulator for animal health that increases stress tolerance and improves health status in livestock, offered to animal nutrition and feed customers.
- CleanRise Innovative methane-derived biostimulant that creates a healthy bioactive complex enabling robust vegetative growth, helping plants reach maximum yield potential with high-quality and clean produce for farmers and agricultural cooperatives.
- Impakt Unique methane-derived protein-based solution that nourishes plants, improves plant cell metabolism and signalling processes, resulting in enhanced photosynthetic rate, yield, and produce quality for farmers.
- Fermented Protein Ingredients Fermented proteins and protein-based ingredients for the human nutrition sector, providing clean, traceable, and sustainable protein alternatives to plant and animal sources with optimal nutritional benefits and high amino acid bioavailability for food manufacturers, supplement producers, and alternative protein product companies.
- Cosmetic Ingredients Functional peptides and diverse chemical moieties derived from methane for the cosmetic sector, offering ingredients with optimal performance and improved carbon footprint as alternatives to chemically synthesized cosmetic ingredients.
- Biodegradable Packaging Solutions Polymer and monomer molecules developed through fermentation and biology expertise for biodegradable and functional packaging solutions using organic acids and alkanoates, addressing microplastic and sustainability concerns.
Quantifiable outcome
- 20-30% yield increase in flower crops (marigold)
- +4 more outcomes
Companies that use String Bio
Customer profileNamed customers4 records
Segments4 records
Ideal customer profiles4 records
String Bio technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
String Bio partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered core and minor.
- BioMarcoreBioMar, a major aquafeed company, validated String Bio's sustainable protein ingredient through their testing protocols. This validation represents a significant endorsement of String Bio's product quality and performance from a leading industry player in the aquaculture nutrition sector.
- Skretting AustraliacoreString Bio partnered with Skretting Australia, a global leader in aquafeed manufacturing, to conduct fish feeding trials. This collaboration validates String Bio's protein ingredients for aquaculture applications and supports market entry in the Asia-Pacific region.
- Srinivasa FarmscoreSrinivasa Farms, led by Dr. Suresh Chitturi (Vice Chairman & Managing Director and Chairman of International Egg Commission), partnered with String Bio for commercialization of sustainable protein ingredients. The collaboration focuses on bringing environmentally sustainable and traceable protein to the feed industry, representing a major step in String Bio's commercial expansion.
- Biocon LimitedminorDr. Kiran Mazumdar-Shaw, Founder of Biocon Limited, has provided endorsement of String Bio's technology platform, calling it an innovative gas fermentation platform from India for global markets. While not a formal commercial partnership, this represents strategic industry validation from a leading Indian biotech figure.
Scale indicators4 records
Recent moves6 records
Expansion highlights6 records
String Bio competitors and assessment
Company assessmentDirect peers
- Calysta (Unibio): Calysta/Unibio produces FeedKind single cell protein via methane gas fermentation for aquafeed and animal nutrition. It is the most direct competitor to String Bio in terms of feedstock (methane), organism class (methanotrophs), and target market (aquafeed/feed ingredients).
- KnipBio: KnipBio develops single cell protein from methanotrophic bacteria (Methylococcus and related strains) for aquafeed applications. Direct technological and customer-overlap peer to String Bio's PRO-DG platform.
- Deep Branch Biotechnology: UK-based gas fermentation company converting CO2 and hydrogen into single cell protein (Proton) for animal feed. Closely comparable platform architecture (gas fermentation → protein) and target end markets.
- NovoNutrients: US-based company using gas fermentation to convert industrial CO2 emissions into microbial protein ingredients for aquafeed and animal feed. Directly comparable technology stack and end-market positioning.
- Circe (Circe Biotechnology): Circe uses gas fermentation to convert CO2 and hydrogen into fats and oils via acetogens. Comparable platform to String Bio's methane fermentation, though focused on lipid outputs; represents the broader gas-fermentation-for-ingredients category.
Broad incumbents
- LanzaTech: US-based, well-capitalized gas fermentation company converting industrial off-gases (including methane) into fuels and chemicals via acetogens. Larger and broader in scope than String Bio, with overlapping platform technology but a primary focus on fuels rather than feed ingredients.
Emerging players
- Nature's Fynd: Uses fungal fermentation to produce Fy Protein, a meat and dairy alternative ingredient. Comparable in that both are fermentation-derived alternative protein platforms, but Nature's Fynd focuses on human food rather than animal feed.
- Perfect Day: Uses precision fermentation to produce dairy-identical whey protein. Comparable as a fermentation-based functional protein ingredients company targeting the human nutrition segment; complementary to String Bio's animal feed focus.
- Solar Foods: Produces Solein, a single cell protein from CO2, hydrogen, and electricity. Comparable as a fermentation-derived SCP platform with adjacent technology approach (electro-biological vs. methanotrophic) and overlapping target markets in sustainable protein ingredients.
- Air Protein: Uses hydrogen-oxidizing bacteria to convert CO2 into protein ingredients for food. Comparable as a gas-fermentation-style microbial protein platform targeting human nutrition; partial overlap with String Bio's human nutrition vertical.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks1 record
Key highlights7 records
Customer concentration
String Bio social profiles
Digital presenceString Bio financial estimates
Financial estimateRevenue estimate
Valuation estimate
String Bio leadership team
Management profileNumber of profiles
Profiles12 records
String Bio funding detail
Funding detailFunding overview
Funding rounds3 records
Investors11 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
String Bio M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about String Bio
What does String Bio do?
String Bio operates a proprietary methane gas fermentation platform that converts methane (a greenhouse gas) into protein-based ingredients, biostimulants, and biochemicals for industrial use. The company manufactures and sells four product categories: Animal Nutrition products (PRO-DG protein feed ingredient, PROmeium immunomodulator), Agriculture biostimulants (CleanRise, Impakt), Human Nutrition fermented protein ingredients, and Emerging Markets ingredients (cosmetic peptides, biodegradable packaging monomers). Products are sold B2B to feed manufacturers, food companies, farmers, and personal care ingredient buyers.
Is String Bio a public or private company?
String Bio is a private company. It is classified as venture growth investor backed and is currently operating.
When was String Bio founded?
String Bio was founded in 2013. It employs 51 to 100 people.
Where is String Bio based?
String Bio is headquartered in Bangalore, India, in the Asia region.
How does String Bio make money?
Four revenue lines are on record. Animal Nutrition Products are the primary driver. The others are agricultural Biostimulants, human Nutrition Ingredients and personal Care Ingredients.
Who are String Bio's main competitors?
Direct peers on record are Calysta (Unibio), KnipBio, Deep Branch Biotechnology, NovoNutrients and Circe (Circe Biotechnology). LanzaTech is listed as a broad incumbent. Emerging players are Nature's Fynd, Perfect Day, Solar Foods and Air Protein.
Does String Bio have an API?
No public API is recorded for String Bio.
What industry is String Bio in?
String Bio's product category is Industrial Biotechnology / Alternative Protein Ingredients. Its primary akta.pro industry code is CRADAOAJ, Proteins & Functional Nutrition Ingredients (Plant/Animal Proteins, Collagen, Amino Acids), with a secondary code of AFADABAI, Swine Specialty/Functional Feed (Gut Health, Probiotics, Acidifiers, Enzymes). Its NAICS code is 311 and its SIC code is 2000.