Otto Birnbaum

Founding Partner at Revent

📍 Berlin Metropolitan Area, Germany🔄 Updated September 2026💼 21 investments📅 11 years investing🗓 Last invested Jan 2024
VC🌍 Germany20+ investments
21
Total investments
15
Early stage
3
Mid stage
1
Late stage
11y
Years active

Portfolio

21 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Board Member
Jan 2024
Super Climate was founded in 2021 with a mission to address the underrepresentation of climate-aligned investments. Since its inception, it has evolved into the premier platform designed for General Partners (GPs) and Limited Partners (LPs) of venture capital funds dedicated to planetary health. A dynamic, community-driven initiative created by VCs for VCs, Super Climate has a clear and impactful goal: to foster collaboration, build connections between GPs and LPs, and drive meaningful global impact. Guided by a vision to create enduring value within planetary boundaries, Super Climate has grown into a vibrant platform for collaboration, attracting a diverse array of VC funds from around the world. Our commitment to driving positive change goes beyond hosting events. We aim to facilitate meaningful connections, inspire innovation, and shape the future of climate and deep tech investments—shifting more capital towards ventures that respect and operate within planetary boundaries.
Investor
May 2023
At CarbonPool, we help society reach NetZero by providing in-kind insurance for failure to achieve net zero commitments due to shortfalls, reversals, business interruptions and natural catastrophes that either reduce the amount of carbon dioxide removals contracted for or unintentionally add carbon dioxide back into the atmosphere.  CarbonPools team of insurance leaders, climate scientists, weather modellers, geographers, and engineers assesses each risk to build bespoke risk models. The premiums collected from each client are invested, alongside CarbonPools own capital, into high quality carbon removal projects, to be able to pay out in-kind.  Currently in the license application process for a Swiss regulated (re)insurance license, CarbonPool can already pre-underwrite your exposures - just reach out to ask for a quote! info@carbonpool.earth
early stageInsurance
Investor
Jan 2023
Powering access to eyecare for everyone by connecting opticians and ophthalmologists through our eye health software platform MIRA - leveraging Telemedicine, AI and a network of over 400 ophthalmologists in Europe
Investor
Dec 2022
We want to create a world where anyone can access the renewable energy they need, forever. We wont stop until thats done. In 2021 our team set out to revolutionise the way renewable energy is bought, sold and powered. We created Renewable Energy Direct (RED) to help any business bypass Big Energy and Big Energy prices. Our energy transactions platform uniquely matches businesses to multiple renewable energy generators at the right time, optimised to drive fairer prices for all and 100% traceability. Were passionate and beyond proud to be powering some of the UKs most exciting and fast-growing businesses in sport, hospitality and manufacturing, and to be saving more than £3.5 million in transaction costs so far (while putting more money back into the hands of renewable generators every time). Join tem and power the renewable energy movement from your doorstep. A bright RED future is ahead of us.
Investor
Jul 2022
Resourcify is on a mission to enable a zero-waste future and circular economy!!! ♻️ Through the digitisation of daily operations, our recycling platform enables all businesses to manage, track, and improve their recycling while having less administration, and saving up to 40% of the costs compared to conventional waste management. Resourcify is trusted by thousands of the most leading companies & organisations around the globe including : Cargill, McDonalds, Hornbach, Johnson & Johnson, Edeka, Frankfurt Airport, UK Bonn, and more! Our award-winning recycling platform improves the approach to sustainability as a best practice and enhances the recycling processes to reduce waste.
Investor
Jan 2022
Noscendo GmbH, a Duisburg (Germany) based molecular diagnostics company, changes the way infection causative microbes are identified. Introducing a paradigm shift using proprietary algorithms and software harnessing next generation sequencing of cell free nucleic acids isolated from patient samples Noscendo brings the concept of liquid biopsy into the field of infectious diseases. Noscendo’ s software solution is capable of differentiating infection from non-infectious signals and thereby aiding intensive care clinicians in their daily task to find the right decisions, enabling a targeted and successful treatment in an actionable timeframe.
Investor
May 2021
Avelios offers a state-of-the-art HIS of the future: Treatment process-oriented digitization, a modular microservices platform & fully structured data. With Avelios you treat more patients - better! The fully modular Avelios software platform digitizes and optimizes all hospital workflows in a user-friendly way. In doing so, the highly innovative software additionally generates fully structured treatment data in an automated manner and enables data-driven research, business intelligence, workflow automation and the development & integration of unique AI algorithms. Our goal is to enable first-class patient care for everyone! At Avelios creativity and smart thinking is at the core of our work. We are constantly stepping outside of our comfort zone to stay ahead and deliver outstanding results to our customers every day. Our clear goal is to be a leading software company in the healthcare sector and our motivated colleagues make the difference on our way to achieve that.
Investor
Nov 2020
Net Purpose is the platform for sustainable and impact investors. We stream facts on the social and environmental outcomes of companies and investment portfolios, to help investors launch, grow and report on sustainable and impact funds. $120 trillion is now committed to investing sustainably or for impact. Net Purpose has built the highest-quality sustainability dataset in the market, and powers the world’s most sophisticated sustainable and impact funds. Backed by clients with over $5 trillion in assets under management and leading investors like ETF Partners, Illuminate Financial and Former Chair of Goldman Sachs Asset Management Jim O’Neill, Net Purpose is on a mission to mobilise trillions of dollars to achieve the Sustainable Development Goals.
Investor
Oct 2020
Sylvera is a leading carbon data provider. Our mission is to incentivize investment in real climate action. To help organizations ensure theyre making the most effective investments toward net zero, we build software that independently and accurately automates the evaluation of carbon projects that capture, remove, or avoid emissions. With Sylveras data and tools, businesses and governments can confidently invest in, benchmark, deliver, and report real climate impact. Were backed by renowned investors like Balderton Capital, Index Ventures, Insight Partners, LocalGlobe, and Salesforce Ventures.
Investor
Sep 2020
The world’s most comprehensive electricity data platform Electricity Maps provides global access to electricity mix, prices and carbon intensity. Available in real-time, historically and forecasted.
Investor
Sep 2020
Banking for a better future ⏳Open an account in a few minutes via app 🌱Not a single cent invested in fossil energy 🦓 more than 120,000 customers Bank services by Solaris SE https://www.tomorrow.one/en-de/
Investor
Dec 2019
Offer investments to your end users via our Investment API. Regulatory licenses included.
Investor
Jul 2019
Founded in late 2019 by Katrin Alberding, Clemens Raemy and Bruno Pires, kenbi is a homecare focused HealthTech company based in Berlin. Driven by the vision to create a world, where everyone is cared for, kenbi is building the first proprietary digital ecosystem around its own nurse agencies and the wider care network. Their technology reliefs nurses from administrative tasks through automation and serves patients and their families with full-circle homecare solutions accessible online. Only four years in, the company is already among the biggest private homecare solution providers in Germany, employing over 1000 nurses across West and East Germany, extending over 120,000 products & services per month. --- kenbi wurde Ende 2019 von Katrin Albering, Clemens Raemy und Bruno Pires gegründet und ist ein auf ambulante Pflege ausgerichtetes HealthTech-Unternehmen mit Sitz in Berlin. Mit der Vision, eine Welt zu schaffen, in der jede:r gut versorgt ist, baut kenbi das erste digitale Ökosystem um seine Pflegestandorte und das breitere Pflegenetzwerk herum auf. Seine Technologie entlastet das Pflegepersonal durch Automatisierung von Verwaltungsaufgaben und bietet Patientinnen, Patienten und ihren Familien online zugängliche Komplettlösungen für die Pflege zu Hause. Innerhalb von nur vier Jahren hat sich das Unternehmen zu einem der größten privaten Anbieter von ambulanten Pflegelösungen in Deutschland entwickelt und beschäftigt über 1.000 Pflegekräfte in West- und Ostdeutschland, die monatlich mehr als 120.000 Produkte & Dienstleistungen erbringen.
Investor
Jun 2019
CoachHub is the global leader in digital and AI coaching that enables organizations to create personalized, measurable and scalable coaching programs for their entire workforce, regardless of department and seniority level. As the leading talent development platform, organizations who use CoachHub benefit from increased employee engagement, higher levels of productivity, improved job performance and greater retention. Alongside its development and implementation of AI coaching, CoachHub has a global pool of over 3,500 certified business coaches in 90 countries across six continents, with coaching sessions available in over 80 languages. Serving more than 1,000 clients worldwide, CoachHub’s leading digital and AI coaching programs are based on proprietary scientific research, AI insights from renowned academics and development from its Innovation Lab. CoachHub is backed by leading tech investors, including Sofina, SoftBank Vision Fund 2, Molten Ventures, Speedinvest, HV Capital, Partech and HSBC Innovation Banking. CoachHub was certified as a carbon-neutral company and consistently measures, reduces, and implements strategies to minimize its environmental impact. Are you a coach? Find out all of the information about our coach network at https://www.coachhub.com/for-coaches/
Investor
May 2018
alphin is the leading marketing platform for local businesses in Europe. alphin provides local business owners with easy and affordable software solutions to centralize and automate their full customer lifecycle management. Currently, 1000+ local businesses in Austria, Germany, Israel and the UK rely on alphin, when it comes to winning and retaining clients through all relevant online channels. Digital marketing offers local companies unprecedented opportunities to grow quickly and sustainably. With alphin 80+ digital native and local loving people from all over the world made it their mission to ensure that every single local business can benefit from it. And that every local business owner can thereby focus on what they really love: their business. Interested in some hard facts? alphin was founded in 2017, is headquartered in Berlin and generates a 7-figure ARR already today.
Show all 21 investments ↓
Experience · 24 entries
All (24)
Investments (21)
Board (1)
2024
Board Member
Jan 2024
Super Climate was founded in 2021 with a mission to address the underrepresentation of climate-aligned investments. Since its inception, it has evolved into the premier platform designed for General Partners (GPs) and Limited Partners (LPs) of venture capital funds dedicated to planetary health. A dynamic, community-driven initiative created by VCs for VCs, Super Climate has a clear and impactful goal: to foster collaboration, build connections between GPs and LPs, and drive meaningful global impact. Guided by a vision to create enduring value within planetary boundaries, Super Climate has grown into a vibrant platform for collaboration, attracting a diverse array of VC funds from around the world. Our commitment to driving positive change goes beyond hosting events. We aim to facilitate meaningful connections, inspire innovation, and shape the future of climate and deep tech investments—shifting more capital towards ventures that respect and operate within planetary boundaries.
2023
Investor
May 2023
At CarbonPool, we help society reach NetZero by providing in-kind insurance for failure to achieve net zero commitments due to shortfalls, reversals, business interruptions and natural catastrophes that either reduce the amount of carbon dioxide removals contracted for or unintentionally add carbon dioxide back into the atmosphere.  CarbonPools team of insurance leaders, climate scientists, weather modellers, geographers, and engineers assesses each risk to build bespoke risk models. The premiums collected from each client are invested, alongside CarbonPools own capital, into high quality carbon removal projects, to be able to pay out in-kind.  Currently in the license application process for a Swiss regulated (re)insurance license, CarbonPool can already pre-underwrite your exposures - just reach out to ask for a quote! info@carbonpool.earth
early stageInsurance
Investor
Jan 2023
Powering access to eyecare for everyone by connecting opticians and ophthalmologists through our eye health software platform MIRA - leveraging Telemedicine, AI and a network of over 400 ophthalmologists in Europe
2022
Investor
Dec 2022
We want to create a world where anyone can access the renewable energy they need, forever. We wont stop until thats done. In 2021 our team set out to revolutionise the way renewable energy is bought, sold and powered. We created Renewable Energy Direct (RED) to help any business bypass Big Energy and Big Energy prices. Our energy transactions platform uniquely matches businesses to multiple renewable energy generators at the right time, optimised to drive fairer prices for all and 100% traceability. Were passionate and beyond proud to be powering some of the UKs most exciting and fast-growing businesses in sport, hospitality and manufacturing, and to be saving more than £3.5 million in transaction costs so far (while putting more money back into the hands of renewable generators every time). Join tem and power the renewable energy movement from your doorstep. A bright RED future is ahead of us.
Investor
Jul 2022
Resourcify is on a mission to enable a zero-waste future and circular economy!!! ♻️ Through the digitisation of daily operations, our recycling platform enables all businesses to manage, track, and improve their recycling while having less administration, and saving up to 40% of the costs compared to conventional waste management. Resourcify is trusted by thousands of the most leading companies & organisations around the globe including : Cargill, McDonalds, Hornbach, Johnson & Johnson, Edeka, Frankfurt Airport, UK Bonn, and more! Our award-winning recycling platform improves the approach to sustainability as a best practice and enhances the recycling processes to reduce waste.
Show all 24 entries ↓
Investment activity
2015–2024 · 21 investments
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