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co2online gGmbH

Berlin, Berlin Reg: R003308 (Vereinsregister) Sign up to see website
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47
Integrity Assessment
Partial transparency
47/100 · methodology

About co2online gGmbH

As a non-profit consulting company based in Berlin, co2online has been committed to energy efficiency and climate protection since 2003. With target group-specific information campaigns, online-based advisory services (e.g. interactive energy saving checks, energy savings account), practical tests and competitions, co2online motivates us to use energy resources more efficiently, use climate protection technologies and deal with climate protection issues in everyday life, the consequences of climate change. The impulses for action, which co2online triggers, are demonstrably contributing to the CO2 reduction. In recent years co2online has carried out more than 15 million individual consultations and thus initiated the prevention of more than 8.8 million tons of CO2 emissions. For the purpose of the representation of interests, discussions are conducted with …

Als gemeinnützige Beratungsgesellschaft mit Sitz in Berlin engagiert sich co2online seit 2003 für Energieeffizienz und Klimaschutz. Mit zielgruppenspe­zifischen Informationskampagnen, onlinebasierten Beratungsangeboten (z. B. interaktive EnergiesparChecks, Energiesparkonto), Praxistests und Wettbewerben motiviert co2online dazu, Energieressourcen effizienter zu nutzen, Klimaschutztec­hnologien einzusetzen und sich im Alltag mit Klimaschutzthemen, den Folgen des Klimawandels zu beschäftigen. Die Handlungsimpulse, die co2online auslöst, tragen nachweislich zur CO2-Minderung bei. In den vergangenen Jahren hat co2online mehr als 15 Millionen Einzelberatungen durchgeführt und damit die Vermeidung von mehr als 8,8 Millionen Tonnen CO2-Emissionen angestoßen. Zum Zwecke der Interessenvertretung werden Gespräche mit Abgeordneten des Deutschen Bundestages sowie Vertreter*innen der Bundesministerien geführt. Inhalt dieser Gespräche sind die Erläuterungen von Änderungsnotwe­ndigkeiten hinsichtlich der deutschen Gebäude- und Energieeffizie­nzpolitik, die im Hinblick auf die notwendige …

Translated from German by GiveRadar.

Founded
Headquarters
Berlin, Berlin
Size
small

Focus areas & reach

· What they work on and where

How it stacks up against peers

· vs. 8 similar environment in Germany
Integrity Assessment This charity: 47
Peer average: 62

Concerns

· None found
No red flags found
Screened for Tax-authority revocation, Open investigations, Governance scandals, Related-party deals, Excessive exec comp.

GiveRadar Analysis

Original analysis from GiveRadar's dataset of comparable organizations

Based on the records currently verified by GiveRadar, co2online gGmbH has a substantially complete profile, cross-referenced across 3 independent sources.

  • GiveRadar has verified financial records for only 2% of environment charities in Germany, and this is one of them. See national comparisons
  • It is one of the better-documented environment charities in Germany GiveRadar currently tracks, because GiveRadar has verified its governance and its contact details. Most of those have little verified data on record yet. View this cohort
  • It has more complete contact information than nearly all similar organizations, with a verified website, email, phone and address on record. See national comparisons
GiveRadar has verified
  • government registration
  • financial records
  • disclosed leadership
  • a website
  • a contact email
  • a donation page
Not yet verified by GiveRadar
  • third-party accreditation
  • an owner-submitted profile claim

Analysis based on GiveRadar's benchmark dataset of 2026-07-03. It describes what GiveRadar has verified, not a judgment of the organization itself.

Common questions

· Auto-generated from filings + methodology

co2online gGmbH is a registered environment nonprofit based in Berlin, Berlin, Germany. It is registered with the German Vereinsregister (Association Register). It was founded in 2003 and has been operating for 23 years. Its registration number is R003308. GiveRadar's Integrity Assessment for the organization is 47/100, which reflects how much public information is available, not whether the charity is legitimate. The organization reports €5K in annual revenue.

co2online gGmbH's official registration number is R003308, as recorded in the national registry of Germany.

co2online gGmbH has a GiveRadar Integrity Assessment of 47/100. This score combines five components: Registration (20 pts), Financial Transparency (30 pts), Governance (20 pts), Contact Availability (10 pts), and Data Recency (20 pts), with negative adjustments for any red flags. A score of 47 ('Partial transparency') means some public data is on file but key signals are missing - worth a closer look before donating. For comparison, the average integrity assessment for environment charities in Germany is 62/100.

co2online gGmbH is located in Berlin, Berlin, Germany. The organization was established in 2003 and has been active for 23 years.

Based on official tax filings, co2online gGmbH has €5K in annual revenue. Its revenue is below the peer average of €489K. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.

co2online gGmbH is classified as an Environment organization, registered in Germany. By size, it is categorized as a small organization. It has €5K in annual revenue.

According to GiveRadar's records, co2online gGmbH is registered with the German Vereinsregister (Association Register) and overseen by the local Amtsgericht (district court). You can donate directly through their official donation page linked on their GiveRadar profile. GiveRadar provides data for research and does not endorse any organization. A GiveRadar Integrity Assessment reflects how much public data is available, not whether an organization is safe to donate to, so it is always smart to do your own research before giving.

As a non-profit consulting company based in Berlin, co2online has been committed to energy efficiency and climate protection since 2003. With target group-specific information campaigns, online-based advisory services (e.g. interactive energy saving checks, energy savings account), practical tests and competitions, co2online motivates us to use energy resources more efficiently, use climate protection technologies and deal with climate protection issues in everyday life, the consequences of climate change. The impulses for action, which co2online triggers, are demonstrably contributing to the CO2 reduction. In recent years co2online has carried out more than 15 million individual consultations and thus initiated the prevention of more than 8.8 million tons of CO2 emissions. For the... co2online gGmbH is classified as an environment organization registered in Germany. The organization was founded in 2003.

Among environment charities registered in Germany: Its annual revenue of €5K is below the peer average of €489K.

co2online gGmbH is a registered nonprofit in Germany. Donations to recognized charitable organizations (gemeinnuetzige Organisationen) are tax-deductible up to 20% of your total income. You will need a donation receipt (Zuwendungsbestaetigung) from the organization for your tax return.

You can verify co2online gGmbH's charitable status in several ways. First, check the Zuwendungsempfaengerregister (ZER) at https://www.bzst.de/DE/Unternehmen/Zuwendungsempfaengerregister_organisation/zuwendungsempfaengerregister_organisation_node.html - the BZSt maintains this federal register of all organisations eligible to receive tax-deductible donations in Germany. Second, you can look up the association in the Vereinsregister (association register) at the local Amtsgericht (district court) via https://www.handelsregister.de/ - this confirms the legal form, registered address, and board members. Third, check whether the organisation holds the Freistellungsbescheid (tax-exemption notice) from its local Finanzamt - the notice is re-issued every three years and confirms the 'gemeinnuetzig' status under the Abgabenordnung. Legitimate charities publish this on their website or provide it on request.

You can donate to co2online gGmbH directly through its donation page (https://www.co2online.de/spenden/?mtm_campaign=meta-menu-link&mtm_kwd=spenden&mtm_source=co2online). German charities typically accept SEPA bank transfer (Ueberweisung) to the organisation's IBAN, SEPA direct debit (Lastschrift/Einzugsermaechtigung) for recurring donations, PayPal, credit card payments, and online payment processors like Stripe or Mollie. Many German charities use platforms like betterplace.org, GoFundMe, or their own Spendenseite (donation page). International donors can give via SEPA transfer (Germany is in the eurozone) or PayPal. For your donation to be tax-deductible, you need a Zuwendungsbestaetigung (donation receipt) from the organisation - for amounts up to 300 euros, a bank statement showing the transfer is sufficient.

co2online gGmbH is based in Berlin, in Berlin, Germany's capital and largest city. Germany is a federation of 16 states (Bundeslaender). Charitable status ('Gemeinnuetzigkeit') is granted by the local Finanzamt and recognised nationwide - the organisation can solicit tax-deductible donations from donors anywhere in Germany.

Annual revenue
Under €10K
Source: Bundestag Lobbyregister why this matters
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Taxes

Tax-deductibility for donors

German donations are deductible if co2online gGmbH holds a Freistellungsbescheid (recognition as a charitable purpose) and issues a Zuwendungsbestätigung receipt.

Always confirm tax treatment with the charity directly or your tax advisor before donating.

Leadership

TA
Tanja L••••
Managing Director

Latest news

From global news sources

1 article found

From news sources and the organization. Shown for transparency; news never affects the integrity score.

Activity timeline

Filings and press mentions, merged

App ecoGator von co2online gewinnt wichtigsten europäischen Umweltpreis / App ... - Presseportal
Jun 2015
www.presseportal.de

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Cause areas in Germany

How many charities work in each area, with this charity's area highlighted.

Community Development 333,723
Education 91,396
Social Services 57,991
Arts & Culture 55,916
Health 33,744
International 29,261
Youth Development 20,117
Environment this charity 16,305
See all cause areas in Germany

Most common causes in Germany

Causes charities work on most.

Community Development 66,182
Education 55,923
Foster Care 51,710
Arts & Culture 43,294
Eldercare & Aging 26,255
International Development 15,257
Health 14,436
Disability 13,265

Sources and verification

Registration and legal identity
Bundesanzeiger (German Federal Gazette)
Financial filings
Bundesanzeiger annual disclosures
News and media coverage
GDELT Project + Google News

Data freshness

Last updated
Jun 12, 2026
Registry checked
Jun 7, 2026
Profile completeness
60%

What we know and don't know

Exactly which public data we hold on this charity. Our score reflects transparency, not impact.

On record · 7
  • Financial data · Annual revenue figure on record
  • Named leadership · Lead officer named
  • Government registration · Registered with an official registry
  • Official website · On record
  • Headquarters address · On file
  • Direct contact · Email or phone published
  • Founding date · 2003
Not available · 4
  • Executive pay
    Top-officer pay not disclosed
  • Mission statement
    No self-published statement of purpose
  • Programs & activities
    No named programs listed by the charity
  • Tax-deductibility
    Not verified

Methodology

GiveRadar builds each profile primarily from official government charity registries, supplemented where available by third-party nonprofit databases and news archives, and combines it into a single 0-100 integrity assessment. The exact sources for this charity are listed above. We don't take a cut of any donation, ever.

Read full methodology

Are you the owner or a board member?

If you represent this organization and want to correct or update its data, you can claim this listing to edit details yourself, or email [email protected] with the correct information. We review every request and respond within 30 days.

Quick facts about co2online gGmbH

What is co2online gGmbH?
co2online gGmbH is a environment nonprofit organization based in Berlin, Germany. As a non-profit consulting company based in Berlin, co2online has been committed to energy efficiency and climate protection since 2003. With target group-specific information campaigns, online-based advisory services (e.g. interactive energy saving checks, energy savings account), practical tests and competitions, co2online motivates us to use energy resources more efficiently, use climate protection technologies and deal with climate protection issues in everyday life, the consequences of climate change. The impulses for action, which co2online triggers, are demonstrably contributing to the CO2 reduction. In recent years co2online has carried out more than 15 million individual consultations and thus initiated the prevention of more than 8.8 million tons of CO2 emissions. For the purpose of the representation of interests, discussions are conducted with representatives of the German Bundestag and representatives of the federal ministries. The content of these discussions are the explanations of need for change regarding German building and energy efficiency policy, which are of great importance in view of the necessary heat and energy transition in Germany and thus for the objectives of the non-profit organization.
When was co2online gGmbH founded?
co2online gGmbH was founded in 2003.
Who leads co2online gGmbH?
Tanja Loitz serves as Managing Director.
Where is co2online gGmbH located?
Headquartered in Berlin, Berlin, Germany.
What is co2online gGmbH's annual budget?
Annual revenue is approximately Under €10K.
Is co2online gGmbH trustworthy?
co2online gGmbH has a GiveRadar Integrity Assessment of 47 out of 100 (Partial transparency). The score reflects public-data transparency: registration, financial disclosure, governance, contact details, and how recently data was refreshed. It does not measure program impact.
What is co2online gGmbH's registration number?
Registration: R003308 (Germany).
What is co2online gGmbH's website?
https://www.co2online.de
Are donations to co2online gGmbH tax-deductible?
Donations may be tax-deductible for residents of Germany under local rules. US donors should check whether the charity has an equivalency-determination letter or a US-based fiscal sponsor before claiming a deduction.