Rent Hav

What Rent Hav does

Rent Hav is a Danish non-profit association (forening) founded in August 2020 and headquartered in Copenhagen, dedicated to stopping the discharge of untreated wastewater into Denmark's seas, lakes, and fjords. The organization was originally established as 'Rent Øresund' in response to a 2020 disclosure that utility HOFOR had been permitted to discharge untreated wastewater into the Øresund for five days, and was later rebranded to Rent Hav to pursue a national policy agenda targeting the Folketinget and the Environmental Minister. Its core deliverables are two data-transparency tools: the Kemikort (Chemical Map), which visualizes 6,185 exceedances of environmental quality standards for harmful substances aggregated from Danmarks Miljøportal, and the Lorte-kortet (Poop Map), a Google Maps-based tool showing the locations of sewage overflow discharge points across Denmark.

The organization is structured as a member-governed association with four annual membership tiers ranging from 75 DKK (students, unemployed, pensioners) to 1,050 DKK (SuperDuper supporters), granting voting rights at general assemblies and board eligibility. It employs 7 people, governed by a board led by Chairman Lars Vestergaard, with a marketing/campaign focus reflected in the leadership composition. Significant non-donor revenue comes from a 2M+ DKK grant from Velux Fonden (2023) used to fund the SKID I HAVET campaign, which was nominated for a European environmental campaign award.

Its go-to-market is community-led, combining direct e-commerce membership sales, partnerships with rowing and winter swimming clubs, social media (Facebook), petitions, and high-visibility public campaigns. The operating geography is exclusively Denmark, with delivery limited to the domestic market via DAO, Post Nord, or GLS. Core products (the membership program, the two mapping tools, and the SKID I HAVET campaign assets) are distributed free or paid through renthav.dk, positioning the organization as a hybrid advocacy-and-data-transparency non-profit rather than a traditional software or services company.

Name

Rent Hav

Legal name

Rent Hav

Website

https://renthav.dk

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

1–10 employees

Short description

Rent Hav is a Danish non-profit association that advocates to stop untreated wastewater discharge into Danish waters, operating member-funded mapping tools (Kemikort, Lorte-kortet) and public campaigns targeting national environmental policy.

Ownership category

akta.pro rank

Headquarters

HQ city

Copenhagen V

HQ country

Denmark

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Marketing or Sales, Personnel, Operations, Technology or R&D

Revenue model

1. Membership Fees: Annual membership fees with tiered pricing: 75 DKK for students/unemployed/pensioners, 350 DKK for fixed income members, 550 DKK for super members, and 1,050 DKK for superduper members. Members receive voting rights at annual general meetings and can run for the board.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels6 records

Core offering

Rent Hav is a Danish non-profit environmental advocacy organization that campaigns to stop the discharge of untreated wastewater into Danish seas, lakes, and fjords. It operates interactive pollution mapping platforms (Kemikort and Lorte-kortet) that visualize chemical contamination and sewage overflow data, sells annual memberships to fund advocacy work, and runs public awareness campaigns targeting national policy change.

Product overview

Rent Hav is an environmental advocacy organization (not a traditional product company) offering a suite of tools to combat sewage pollution in Danish waters. Its core products include the Kemikort (Chemical Map) and Lorte-kortet (Poop Map) - interactive mapping tools that visualize pollution data from Danmarks Miljøportal and sewage overflow locations. The primary service offering is the Membership Program, which provides supporters voting rights and board eligibility in exchange for annual fees. Supporting offerings include awareness campaigns like the SKID I HAVET initiative. The organization functions as a membership-based advocacy group focused on policy change rather than commercial product delivery.

Differentiator

Problem solved

Functional benefit

Products and services

• Kemikort (Chemical Map)
• Lorte-kortet (Poop Map)
• Membership Program (Medlemskab) Annual membership program providing voting rights at general assemblies and eligibility to run for the board. Four tiers: student/unemployed/pensioner (75 DKK/year), standard income (350 DKK/year), super (550 DKK/year), and super-duper (1,050 DKK/year). Targeted at individuals who support marine conservation advocacy.

Quantifiable outcome

• Over 34 billion liters of untreated sewage discharged annually into Danish waters
• +2 more outcomes

Named customers3 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature1 record

Partnerships

Three partnerships are on record, tiered minor.

• Danmarks MiljøportalminorOthersData source for the chemical pollution map. Rent Hav aggregates measurement data from the Danish Environmental Portal and compares it against Miljøstyrelsens quality criteria.
• Lyngby MunicipalityminorOthersLyngby Municipality has installed advanced treatment technology for removing environmentally harmful substances from sewage - cited as an example of successful implementation that other municipalities should follow.
• Herning MunicipalityminorOthersHerning Municipality has implemented biological treatment methods - cited as an example of successful sewage treatment technology implementation alongside Lyngby.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Oceana: Large international ocean-conservation advocacy organization focused on policy change. Comparable to Rent Hav in centering policy advocacy and data-driven campaigns around ocean health, though with far greater geographic and financial scope.
• WWF Denmark (Verdensnaturfonden): Established Danish arm of a global environmental NGO with a broad portfolio spanning oceans, climate, and wildlife. Comparable as a Denmark-based environmental advocacy organization, though with substantially larger resources and a wider mandate than Rent Hav's water-pollution focus.
• Greenpeace Denmark: Danish office of Greenpeace, a global environmental advocacy organization using public campaigns and direct action. Comparable in advocacy style (high-profile campaigns, public mobilization) and constituency overlap, though Greenpeace's scope is far broader than Rent Hav's sewage focus.

Direct peers

• Surfrider Foundation: Grassroots environmental organization dedicated to the protection and enjoyment of oceans, waves, and beaches. Comparable to Rent Hav in targeting water-user communities (surfers, swimmers), running beach-water-quality advocacy, and publishing interactive pollution maps.
• Waterkeeper Alliance: International nonprofit network of community-based water advocates focused on protecting rivers, lakes, and coastal waters from pollution. Directly comparable to Rent Hav in mission (water-pollution advocacy), grassroots member structure, and use of mapping/data tools to document pollution.
• Danmarks Naturfredningsforening (Danish Society for Nature Conservation): Denmark's largest environmental membership NGO with a national mandate across biodiversity, climate, and water-quality issues. Directly comparable as a Danish member-driven environmental advocacy organization competing for the same constituency and donor pool as Rent Hav.
• NOAH (Friends of the Earth Denmark): Danish environmental advocacy organization focused on pollution, climate, and resource issues. Closely comparable to Rent Hav as a smaller, issue-driven Danish NGO using public campaigns and political advocacy to drive environmental policy change.

Regional players

• Plastic Change: Denmark-based NGO focused on plastic pollution in oceans. Comparable as a Danish water-pollution advocacy organization with similar grassroots mobilizing tactics, though its focus is specifically on plastic rather than sewage and chemical contamination.

Emerging players

• The Ocean Cleanup: Nonprofit developing technology to rid oceans of plastic. Comparable as a high-profile water-pollution-focused NGO that combines advocacy with a distinctive technical/data asset, similar to Rent Hav's Kemikort mapping tool.
• Plastic Bank: Social enterprise addressing ocean plastic by building collection infrastructure in coastal communities. Comparable to Rent Hav in being a mission-driven water-pollution organization using technology and partnerships, though structured as a social enterprise rather than a membership NGO.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/RentHavDK
• LinkedInlinkedin.com/company/renthav

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 Rent Hav