Harp Renewables

What Harp Renewables does

Harp Renewables is an Irish-headquartered biotechnology company that designs, manufactures, and sells thermophilic aerobic biodigesters for on-site organic waste processing. Its proprietary technology combines a unique enzyme/additive blend with mechanical rotation and precise environmental controls (temperature, moisture, pH) to convert food and organic waste into nutrient-rich bio-fertiliser within 24 hours, reducing waste volume by up to 85% and diverting it from landfill. The product portfolio spans the CX Series (CX1 through CX100) addressing capacities from 142 L/day to over 50,000 L/week, the consumer-facing Harp Home Composter (€899), and the Harp Infusion Fertiliser sold as a circular-economy byproduct in 3kg–500kg SKUs. The company operates a hybrid go-to-market: enterprise field sales to hospitality groups (Kew Gardens, Valamar Group, Cashel Palace), agricultural operators (Finnegans Farm, Red Plains Butchery), waste management companies (WRT), and educational institutions (Penair School); direct-to-consumer e-commerce for the home composter and fertiliser; and distributor channels including an expanded partnership with Interzero for European market reach. In May 2026, Harp Renewables Limited filed for examiner appointment under Part 10 of the Irish Companies Act 2014, with Dessie Morrow of Azets Ireland appointed Interim Examiner — a formal restructuring event indicating financial distress and introducing material execution risk for the business going forward.

Name

Harp Renewables

Legal name

Harp Renewables Ltd.

Website

https://www.harprenewables.com/

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

51–100 employees

Short description

Harp Renewables is an Irish biotechnology company that designs and sells thermophilic aerobic biodigesters (CX1–CX100) and the Harp Home Composter for on-site organic waste processing, serving hospitality, agriculture, waste management, and education customers across Europe and the US.

Ownership category

akta.pro rank

Product category

Waste Management Equipment

NAICS

Nitrogenous Fertilizer Manufacturing (325311)

SIC

Farm Machinery & Equipment (3523)

akta.pro primary industry

Bio-based Fertilizers, Soil Amendments & Biostimulants (Digestate-derived, biochar-based inputs) (EUAAAIAH)

Keywords

• Aerobic biodigester systems
• Organic waste processing
• Food waste recycling equipment
• Thermophilic digestion technology
• Bio-fertiliser production

Headquarters

HQ city

Tustin

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Supply Chain, Personnel, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Biodigester Hardware Sales: Sale of commercial Harp CX Series biodigesters (CX1 through CX100) to enterprise and mid-market customers. Units are configured to customer waste volume and type requirements, with optional add-ons including shredders, hoppers, bin lifters, auto-feeding systems, load cells, and remote monitoring. Pricing varies by model and configuration.
2. Harp Home Composter Sales: Direct-to-consumer sale of the Harp Home Composter unit (€899 per unit) through the company's e-commerce storefront. Additional revenue from consumables such as starter packs and accessories.
3. Harp Infusion Fertiliser Sales: Sale of the Harp Infusion organic fertiliser product through multiple channels including e-commerce bundles (3kg buckets at €20.79, 10kg buckets at €35.99, 4×10kg bundles at €60.00), 500kg bulk bags at €275, and pallets for resellers at €305.36. Fertiliser is produced as a byproduct of the biodigestion process and sold as a circular-economy product.
4. Service, Maintenance & Support: Ongoing service, maintenance, and technical support for installed biodigester units. The company provides installation, operator training, and after-sales support. Some customers report direct engagement with Harp specialists for configuration and bulk bag enquiries.
5. Carbon Offsetting: The company references carbon offsets as part of its product offering, aligning with its environmental mission of reducing greenhouse gas emissions through organic waste diversion from landfill.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels7 records

Core offering

Harp Renewables manufactures and sells the Harp CX Series of aerobic biodigesters (CX1–CX100), on-site machines that use proprietary thermophilic biotechnology to convert food and organic waste into nutrient-rich bio-fertiliser within 24 hours. The portfolio also includes the Harp Home Composter for households, the Harp Infusion Fertiliser byproduct sold in consumer and bulk packs, plus related services in soil enhancement, carbon offsets, and electrical engineering.

Product overview

Harp Renewables offers a unified product portfolio centered on thermophilic aerobic digestion technology for organic waste management. The core CX Series (CX1 through CX100) provides scalable commercial biodigester solutions that process food and organic waste into nutrient-rich fertilizer within 24 hours, reducing waste volume by up to 85%. Supporting the commercial line, the Harp Home Composter brings the same biotechnology to household consumers. The Harp Infusion Fertiliser represents the valuable byproduct created from the biodigestion process, sold as a premium organic soil amendment. Additional services include soil enhancement, carbon offsets, electrical engineering, and LED lighting, creating a comprehensive circular economy solution for organic waste.

Differentiator

Problem solved

Functional benefit

Brands

• Harp Biodigester: Commercial-scale aerobic biodigester product line including CX1, CX2, CX3, CX5, CX10, CX20, CX50, and CX100 models for processing organic waste into bio-fertilizer.
• Harp Home Composter
• Harp Infusion Fertiliser
• Harp Electrical Engineering

Products and services

• Harp CX1 Biodigester

Quantifiable outcome

• Waste volume reduction of up to 85% in 24 hours (Kew Gardens case study confirms 80% reduction)
• +6 more outcomes

Named customers12 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• InterzerocoreStrategic or Co-development Partner · 25 March 2025Harp Renewables announced the expansion of its partnership with Interzero, described as 'a leading European provider of circular economy and waste management solutions' and 'a well-established sustainability partner across multiple European countries.' The expanded partnership aims to bring Harp Renewables' sustainable solutions to new European markets, leveraging Interzero's established network and circular economy expertise.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Anaergia: Anaergia is a publicly-listed engineering/operator in resource recovery with anaerobic digestion, organics processing, and landfill gas capture systems serving municipal and commercial waste-management customers in North America. Adjacent incumbent scope to Harp's Waste Management & Municipal segment with overlapping procurement lists (US, Canada).
• BioFerm Energy / Schmack Biogas (Viessmann): BioFerm (now part of Viessmann's Schmack biogas business) designs and operates anaerobic digestion / biogas plants at industrial scale for agricultural and food-waste streams in Europe. Same customer problem (organic waste treatment) but anaerobic rather than aerobic, and energy-yielding rather than fertiliser-producing.

Direct peers

• Oklin International: Oklin manufactures on-site food-waste composting machines (GG Series, OKO) for restaurants, hotels, hospitals and commercial kitchens in North America and Asia — directly comparable aerobic dewatering composter technology aimed at the same hospitality/institutional segments.
• BioHiTech Global: Formerly a Nasdaq-listed provider of on-site aerobic food waste digestion systems (the Eco-Safe Digester product line) sold into hospitality, healthcare, and university accounts in North America — directly comparable on technology (on-site aerobic digestion) and customer segments (food service, institutional, healthcare).
• Joraform / Jora (AB): Joraform manufactures thermophilic/insulated industrial and household composters used in kitchens, restaurants, and small commercial sites. Comparable aerobic-composting technology and overlapping residential and commercial customer segments; smaller capacity range than Harp's CX1-CX20.
• ORCA (by Ecogest): ORCA is a brand of on-site aerobic biodigesters distributed in Ireland and the UK competing head-to-head with Harp's CX1-CX5 units in the hospitality, retail, and education segments. Directly comparable technology stack and European customer overlap.
• Ecogest Group: Ecogest designs and supplies on-site food-waste biodigesters and aerated-bin systems aimed at hospitality, schools, and food processors in Ireland and the UK — a close competitor to Harp's CX series offering with overlapping product positioning and channel.
• Lomi (by Pela Earth): Lomi sells a premium home-composter that dehydrates and grinds household food waste into compost material. Closest direct competitor in the residential-ecomposter category to Harp Home Composter, with comparable D2C pricing and 24-hour processing narrative.
• FoodCycler (Food Cycle Science): FoodCycler sells countertop dehydrator-style in-home composters to households and small businesses. Comparable to Harp's Harp Home Composter (€899) on consumer proposition, decentralized food-waste processing, and circular-economy narrative.

Emerging players

• Cambrian Innovation: Cambrian Innovation develops biotech and water-recovery platforms for food/beverage processors and industrial customers, including on-site treatment of organic residuals. Comparable biotechnology-driven, on-site solution orientation for food/industrial waste streams; smaller scale and narrower US focus than Harp.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/harp_renewables
• YouTubeyoutube.com/channel/UCYqhfeLgaqHGSWGCymZ_3RA
• Facebookfacebook.com/HarpRenewables
• LinkedInlinkedin.com/company/harp-renewables

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Harp Renewables