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Madaster

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Madaster is an award-winning platform helping construction track materials, cut carbon and protect value.

103%
 - 
Funded 30 Mar 2026
€600,005 target
€622,778 from 121 investors
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Business overview

Location Amsterdam, Netherlands
Social media
Website madaster.com/
Sectors Data & Analytics Digital B2B
Company number 78151562
Incorporation date 28 May 2020
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Investment summary

Type Equity
Valuation (pre-money) €10M
Equity offered 5.86%
UK tax relief N/A
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Business highlights

  • 1,800+ users across 10+ countries
  • €2M+ recurring subscription revenue*
  • EU regulations drive high demand for data
  • Backed and used by leading companies
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Key features

  • Secondary Market
  • Nominee investment min. €24.03 +

Pitch

About the Campaign

Madaster converts material data into actionable insight for net zero construction.

Market Opportunity

Most tools stop at projects. Madaster is a platform built for impact at scale - used across portfolios and multiple stakeholders, so that circularity and decarbonisation become a successful operation.

Traction & Key Accomplishments

33 in-house specialists across product, data, and built-environment expertise, focused on practical solutions that scale.

Use of Funds

Raising funds to drive the next growth phase.

The funds raised will be used over a period of 24 months to grow existing markets, while laying the foundation for further international expansion:

Please note that any discounts, rewards and/or offers listed by a company in its campaign are subject to the terms and conditions applied by that company. It is the company’s responsibility to honour such discounts, rewards and/or offers and Republic Europe does not take any responsibility for them.

Pitch DE

Über die Kampagne

Madaster stellt Materialdaten ins Zentrum für zukunftsfähiges und klimaneutrales Bauen.

Marktchance

Viele Tools enden auf Projektebene. Madaster ist eine Plattform die ihre Wirkung im Portfolio entfaltet. Mit Madaster werden die Vorteile der Dekarbonisierung und Ressourceneffizienz über mehrere Stakeholder hinweg genutzt.

Wichtigste Errungenschaften

33 internationale Spezialist:innen aus den Bereichen Daten, Architektur, Real Estate und Wirtschaft – fokussiert auf praktikable Lösungen, die skalierbar einsetzbar sind und Wirkung entfalten.

Verwendung der Mittel

Kapital für die nächste Wachstumsphase

Die eingeworbenen Mittel werden über einen Zeitraum von 24 Monaten eingesetzt, um in bestehenden Märkten weiter zu wachsen und gleichzeitig die Grundlage für eine weitere
internationale Expansion zu schaffen:

Bitte beachten Sie, dass alle von einem Unternehmen im Rahmen seiner Kampagne aufgeführten Rabatte, Prämien und/oder Angebote den jeweiligen Geschäftsbedingungen dieses Unternehmens unterliegen. Es liegt in der Verantwortung des Unternehmens, diese Rabatte, Prämien und/oder Angebote einzuhalten; Republic Europe übernimmt hierfür keine Haftung.

Key Information

Key information investment sheet

Key Investment Information Sheet is available by downloading the following documents:

Material debt

The Company has the following outstanding loans:

1. €60,000 loan from Provincie Utrecht with an interest rate of 2%. There are repayment obligations until the end 2026. From 2027 onwards, the repayment obligation is €20,000 per year.

The funds raised as part of this round will not be used to repay these loans.

Outstanding Convertibles

The company has the following outstanding convertible loans, which may convert to equity after this round and dilute existing shareholders:

1. Madaster Services B.V. (2018 Agreement)
€411,240.00 loan from Crowd investors via Symbid, with the following key terms:

• Interest rate: 6% per annum (simple interest), added to the principal annually.

• Conversion trigger:
- Issuance of shares to a third party for at least €1,000,000.
- Sale of a substantial part (>30%) of existing shares to a third party.
- Maturity of the loan.

• Conversion price: The lowest price per share paid by the third party, minus a discount based on timing:
- 15% discount if converted between 3 months and 1 year.
- 20% discount if converted between 1 year and 2 years.
- 30% discount if converted after 2 years.

• Valuation Cap: €30,000,000.

• Share class: Certificates of Shares (Certificaten van Aandelen) via a Stichting Administratiekantoor (STAK), carrying financial rights but no voting rights.

• Repayment date: 5 years from issuance, unilaterally extendable by the borrower by 2 years.

2. Madaster Holding B.V. (2025 Agreement)
€76,000.00 loan from Crowd investors via Eyevestor, with the following key terms:

• Interest rate: 8.5% per annum (simple interest), payable at the end of the term.

• Conversion trigger:
- Issuance of shares to a third party for at least €5,000,000.
- Sale of a substantial part (>30%) of existing shares to a third party.
- Maturity of the loan.

• Conversion price: The lowest price per share paid by the third party, minus a discount based on timing:
- 15% discount if converted between 3 months and 1 year.
- 20% discount if converted between 1 year and 2 years.
- 30% discount if converted after 2 years.

• Valuation Floor ("Ondergrens"): €27,500,000 based on the total market value of all shares.

• Share class: Certificates of Shares (Certificaten) via Madaster STAK.

• Repayment date: 5 years from issuance, unilaterally extendable by the borrower by 2 years (max 7 years total).

Majority Investor Owned

The Company is majority investor owned, with the largest stake being held by Early Stage BV. The Management team owns 19% of the shares via their personal holding company.

Group structure

Investors in this round are investing into and will become shareholders of Madaster Holding BV (KVK 78151562). This is the holding company for the group. The group structure is as follows:

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Only shareholders can access this page

If you successfully purchase a share lot of this business, you will be granted access.

Buy shares

Only shareholders can access this page

If you successfully purchase a share lot of this business, you will be granted access.

Buy shares

Only shareholders can access this page

If you successfully purchase a share lot of this business, you will be granted access.

Buy shares

Only shareholders can access this page

If you successfully purchase a share lot of this business, you will be granted access.

Buy shares

Investing involves risks, including loss of capital, illiquidity, lack of dividends and dilution, and should be done only as part of a diversified portfolio. Please read the Risk Warnings before investing. Investments should only be made by investors who understand these risks. Tax treatment depends on individual circumstances and is subject to change in future.

This campaign for Madaster has been approved by Seedrs Limited (trading as Republic Europe) ("Republic Europe", "us" or "we"), as of 10 February 2026 as a financial promotion. Republic Europe is authorised and regulated by the Financial Conduct Authority with firm reference number 550317. In approving this campaign, Republic Europe has concluded that the information, taken as a whole, is "fair, clear and not misleading." This means that for factual statements we have reviewed evidence of their accuracy, and that for aspirational statements we believe they are phrased appropriately in light of their speculative nature. You should note that in the case of factual statements, the evidence we review is provided by the business, and we do not audit it, which means that we may not be able to identify forged or altered evidence. You should further note that in the case of aspirational statements, the nature of the type of businesses presented on the Republic Europe platform is such that they are likely to have high ambitions, and we may approve statements that convey those ambitions even where we do not believe, or we do not have a view on whether it is likely, that they will be fully realised. The pre-money valuation and investment sought in the campaign are those set by the business: they are not reviewed or established by us, and the valuation is not an independent view of what the business is worth. Given the nature and type of businesses presented on the Republic Europe platform, it is possible that the business has very little cash remaining prior to receiving this investment, and the investment sought may be necessary for the business's on-going existence.

Republic Europe does not make investment recommendations to you. No communications from Republic Europe, through this website or any other medium, should be construed as an investment recommendation. Further, nothing on this website shall be considered an offer to sell, or a solicitation of an offer to buy, any security to any person in any jurisdiction to whom or in which such offer, solicitation or sale is unlawful. Republic Europe does not provide legal, financial or tax advice of any kind. If you have any questions with respect to legal, financial or tax matters relevant to your interactions with Republic Europe, you should consult a professional adviser.

Tax Relief (SEIS)

This business is eligible for SEIS relief - providing qualifying investors with income tax relief of 50% of their investment and certain other tax reliefs. Tax treatment depends on individual circumstances and is subject to change in future. Click to learn more.

Tax Relief (EIS)

This business is eligible for EIS relief - providing qualifying investors with income tax relief of 30% of their investment and certain other tax reliefs. Tax treatment depends on individual circumstances and is subject to change in future. Click to learn more.

Valuation (pre-money)

Valuation rounded from €10,005,860

This is the fully-diluted pre-money valuation of the business (i.e. before the new investment comes in and including issued options and other equity interests). In contrast, the post-money valuation is based on inclusion of the new investment in the value.

It is calculated as the pre-money valuation plus the amount of new investment. e.g. If Company A is ascribed a pre-money valuation of £1,200,000 by prospective investors investing £300,000, its post-money valuation is £1,500,000.

The investee business is responsible for setting its own valuation, it has not been prescribed by Republic Europe.

Pitch type

Investing in a regular equity campaign is the simplest and most common way to invest in a startup. You decide which business you want to invest in, and if the campaign hits its funding target then you will become one of their shareholders. As the company becomes more valuable, so do your shares; allowing you the opportunity to share in the future success of the business.

Learn more about pitch type on Republic Europe

Equity Offered

The equity offered is the percentage of the company’s shares being issued in return for the amount of investment raised.

When the amount raised is less than 100%, the equity offered is based on the target raise. Once the company has raised over 100% it is based on the total raised.

In some scenarios, entrepreneurs may accept additional direct investment after closing their Republic Europe campaign. Provided this is within 6 months of the closing and on the same terms, we do not typically offer pre-emption rights on that extra investment (where you have the opportunity to invest again to maintain your percentage shareholding).

Learn more about investing and pre-emption rights.

Nominee investment

This shows if you are able to choose, when making an investment, that you be represented by, and your shareholding be managed by, the Nominee investment.

Find out more

Custodian

If you invest in this Campaign, Republic Europe will act as Custodian rather than provide our standard nominee service. This is due to the fact that the business is not directly involved in the share sale and Republic Europe will not benefit from any rights under a shareholder agreement. As a result, Republic Europe will handle administrative tasks as we do normally, but you will not have information or voting rights, updates from the business, preemption on future fundraising, or ongoing support about business trading activity.

Learn more about Custodian here

Secondary market

This shows if the business has opted-in or opted-out of allowing its shares to be bought and sold on the secondary market.

Find out more

Direct investment

If available, this is an option to invest and hold shares 'directly' in the company (rather than via the Nominee investment). This option is only available to those investing over the threshold amount, which is determined by the fundraising company.

If you choose to hold your shares directly, you will be responsible for any contractual or administrative arrangements with the company you are investing in.

Find out more

Payment options

We are not able to accept card payments for investments into this sector. You can pay for your investment by creating a bank transfer, using funds in your investment account or create a Pay by Bank payment. Your investment will only be completed once the funds have reached our account.

Business Involvement

This Campaign offers shares for sale in business that is not directly involved in this Campaign or the sale. As a result, the Campaign and post-investment experience, including investor rights, will differ from a business-led campaign on Republic Europe. Most notably, the business will not engage with investors in the discussion forums both during and after the sale or provide any updates to investors.

Learn more here

Payment options

We are not able to accept Pay by Bank payments for investments into this sector. You can pay for your investment with a card payment, by creating a bank transfer or by using funds in your investment account. Your investment will only be completed once the funds have reached our account.

Drawdowns

This campaign offers the ability to pay for an investment by drawdowns.

Security Token

A security token is a digital asset that represents ownership or other rights. It is a digital form of traditional investments. In the future, you may be able to trade your investment through compatible exchanges.

Warning

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None of the information in constitutes part of the campaign and it has not been approved or reviewed by Republic Europe.

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