Sustainability is only getting hotter and hotter. Europe now boasts six unicorns, from Tesla-rival Arrival to oat milk brand Oatly — both set to IPO in the coming months.
But who could be next?
We’ve cherrypicked the 100 most innovative startups across climate tech, cleantech, greentech and beyond — they’ve got sustainability at the heart of their mission and messaging and are providing very necessary tech solutions to the climate crisis.
12 of the companies launched in the last year, including smart construction company 011h and Sylvera, the platform investigating carbon offsetting initiatives.
We’ve by no means forgotten big players with big raises to match — like refurbished product marketplace Back Market, which raised €110m; or vertical farming startup Infarm, which raised $170m in 2020.
You can view the full list below.
(P.S The data (including valuation estimates) is from Dealroom. If anything is wrong, please let us know by email at [email protected]).
Key
Year founded
Amount raised
Last funding round
Valuation
Employees

Sifted Take
UK-based Tevva has raised a $12.5m round from undisclosed investors. The cash will help the startup — which has bagged big clients like UBS — boost the rollout of its zero-emission e-trucks.
2012
€24m
LATE VC
€45-68m
10-50
Sifted Take
UK-based Tevva has raised a $12.5m round from undisclosed investors. The cash will help the startup — which has bagged big clients like UBS — boost the rollout of its zero-emission e-trucks.

The Shellworks
Makes compostable materials from seafood waste
food / manufacturing
theshellworks.comLondon, UK
2019
BOOTSTRAPPED
N/A
1-10

The Shellworks
Makes compostable materials from seafood waste
food / manufacturing
theshellworks.comLondon, UK
2019
BOOTSTRAPPED
N/A
1-10

Tickr
Impact investment app built for the next generation of investors
fintech / investing
tickr.co.ukLondon, UK
2018
€5m
EARLY VC
€12-18m
10-50

Tickr
Impact investment app built for the next generation of investors
fintech / investing
tickr.co.ukLondon, UK
2018
€5m
EARLY VC
€12-18m
10-50

Tideal
Tideal is a community-led and data-inspired climate action platform. Currently in closed beta
education / enterprise software
tideal.appHelsinki, Finland
2019
BOOTSTRAPPED
N/A
1-10

Tideal
Tideal is a community-led and data-inspired climate action platform. Currently in closed beta
education / enterprise software
tideal.appHelsinki, Finland
2019
BOOTSTRAPPED
N/A
1-10

Tomorrow
Mobile banking goes sustainable
banking / fintech
tomorrow.oneHamburg, Germany
2017
€12m
SEED
€43m
50-100
Sifted Take
Launched in 2017, the German challenger bank claims to be the first mobile current account that centres around sustainability. Each transaction and payment helps a social business, a climate change initiative or a renewable energy project — kind of like the search engine Ecosia. Currently it’s only available in Germany, though rumour has it expansion is on the cards soon.
It works with fellow German fintech and infrastructure company solarisBank, was backed by the Environmental Technologies Fund in 2019, and recently raised €3m in a seed funding round led by Wiwin.
2017
€12m
SEED
€43m
50-100
Sifted Take
Launched in 2017, the German challenger bank claims to be the first mobile current account that centres around sustainability. Each transaction and payment helps a social business, a climate change initiative or a renewable energy project — kind of like the search engine Ecosia. Currently it’s only available in Germany, though rumour has it expansion is on the cards soon.
It works with fellow German fintech and infrastructure company solarisBank, was backed by the Environmental Technologies Fund in 2019, and recently raised €3m in a seed funding round led by Wiwin.

Too Good To Go
Mobile platform that connects users with delicious unsold food from a variety of shops and restaurants
food / food logistics & delivery
toogoodtogo.comCopenhagen, Denmark
2015
€39m
SERIES A
€113-169m
500-1000
Sifted Take
The Too Good To Go app connects customers with restaurants and shops that want to sell their surplus food for a 70% discount.
The startup claims to have saved 66.2m meals globally Mette Lykke, CEO of Too Good To Go recently told Sifted that “this translates intto 162,500 tonnes of CO2 emissions.”
Since being founded in 2015, the startup now operates in 15 markets in Europe as well as New York and Boston. It last wooed investors in January 2021 for its $31m Series A round.

Too Good To Go
Mobile platform that connects users with delicious unsold food from a variety of shops and restaurants
food / food logistics & delivery
toogoodtogo.comCopenhagen, Denmark
2015
€39m
SERIES A
€113-169m
500-1000
Sifted Take
The Too Good To Go app connects customers with restaurants and shops that want to sell their surplus food for a 70% discount.
The startup claims to have saved 66.2m meals globally Mette Lykke, CEO of Too Good To Go recently told Sifted that “this translates intto 162,500 tonnes of CO2 emissions.”
Since being founded in 2015, the startup now operates in 15 markets in Europe as well as New York and Boston. It last wooed investors in January 2021 for its $31m Series A round.

Vanilla Steel
E-commerce platform facilitating the transaction of excess steel produce between suppliers and buyers
construction / marketplace & ecommerce
vanillasteel.comBerlin, Germany
2020
BOOTSTRAPPED
N/A
10-50
Sifted Take
Steel is one of the most environmentally destructive resources, producing around 8% of global carbon emissions — and Vanilla Steel, though low on its sustainability messaging — is tackling the steel industry head on.
Its ecommerce platform allows suppliers and buyers to sell and buy non-prime steel (excess steel produce) — a market worth €9bn in annual gross merchandising value.
Between its launch in June 2020 and October that year, it handled 1k tonnes of steel. Currently bootstrapped, it’s primed for some investment this year.

Vanilla Steel
E-commerce platform facilitating the transaction of excess steel produce between suppliers and buyers
construction / marketplace & ecommerce
vanillasteel.comBerlin, Germany
2020
BOOTSTRAPPED
N/A
10-50
Sifted Take
Steel is one of the most environmentally destructive resources, producing around 8% of global carbon emissions — and Vanilla Steel, though low on its sustainability messaging — is tackling the steel industry head on.
Its ecommerce platform allows suppliers and buyers to sell and buy non-prime steel (excess steel produce) — a market worth €9bn in annual gross merchandising value.
Between its launch in June 2020 and October that year, it handled 1k tonnes of steel. Currently bootstrapped, it’s primed for some investment this year.

Verkor
Industrial company set to amplify battery cell production in Europe
energy storage / B2B
verkor.comGrenoble, France
2020
N/A
N/A
10-50
Sifted Take
If you measure success by association, Verkor's already big news — the startup's partnered with EIT InnoEnergy and Schneider Electric, and backed by the IDEC Group. It's focused on locally produced, low-carbon batteries to support a move toward electric vehicles in particular.
Verkor's another startup scaling fast — it's announced a gigafactory which is scheduled to start operations in 2023 and requires around €1.6bn in investment. According to Europa, demand in the 2020s for batteries will require two to three gigafactories in France alone.
Last month the company announced a partnership with software company and consultancy Capgemini to create data collection systems to make the factory über-efficient.

Verkor
Industrial company set to amplify battery cell production in Europe
energy storage / B2B
verkor.comGrenoble, France
2020
N/A
N/A
10-50
Sifted Take
If you measure success by association, Verkor's already big news — the startup's partnered with EIT InnoEnergy and Schneider Electric, and backed by the IDEC Group. It's focused on locally produced, low-carbon batteries to support a move toward electric vehicles in particular.
Verkor's another startup scaling fast — it's announced a gigafactory which is scheduled to start operations in 2023 and requires around €1.6bn in investment. According to Europa, demand in the 2020s for batteries will require two to three gigafactories in France alone.
Last month the company announced a partnership with software company and consultancy Capgemini to create data collection systems to make the factory über-efficient.

Vestiaire Collective
Circular fashion platform
marketplace & ecommerce / fashion
vestiairecollective.comParis, France
2009
€19m
SERIES G
€236-354m
500-1000
Sifted Take
Vestiaire Collective is now a hallmark of the European sustainable and ‘circular fashion’ subsector. Based in Paris, the company has received backing from Balderton Capital, Bpifrance and Condé Nast, the fashion-focused media company.
Its Series G round in April 2020 raised €59m from the latter two, as well as six other firms and angel investor Maximilian Bittner. It also told Sifted that despite an initial dip in sales during the first Covid-19 lockdown, sales have surpassed those before the pandemic. In April it experienced its biggest sales day since launching in 2009.
Vestiaire boasts over 9m users in 90 countries, but still, it’s competing against Lithuania’s Vinted and the UK’s Depop. It also dropped from La French Tech’s Next40 list (2020) to the FT120 in this year’s rankings.

Vestiaire Collective
Circular fashion platform
marketplace & ecommerce / fashion
vestiairecollective.comParis, France
2009
€19m
SERIES G
€236-354m
500-1000
Sifted Take
Vestiaire Collective is now a hallmark of the European sustainable and ‘circular fashion’ subsector. Based in Paris, the company has received backing from Balderton Capital, Bpifrance and Condé Nast, the fashion-focused media company.
Its Series G round in April 2020 raised €59m from the latter two, as well as six other firms and angel investor Maximilian Bittner. It also told Sifted that despite an initial dip in sales during the first Covid-19 lockdown, sales have surpassed those before the pandemic. In April it experienced its biggest sales day since launching in 2009.
Vestiaire boasts over 9m users in 90 countries, but still, it’s competing against Lithuania’s Vinted and the UK’s Depop. It also dropped from La French Tech’s Next40 list (2020) to the FT120 in this year’s rankings.

Vinted
The largest online international C2C marketplace in Europe dedicated to second-hand fashion
marketplace & ecommerce / fashion
vinted.comVilnius, Lithuania
2008
€232m
SERIES E
€1bn
500-1000
Sifted Take
Lithuanian startup Vinted tapped into the ever-trending second hand clothing market early on in 2008 — a critical space for the circular economy. It’s still growing steadily, with a 50% increase in its team and an additional 11m users across 12 markets in one year. We think it’s got a promising 2021 ahead, especially after acquiring Dutch competitor United Wardrobe in late 2020.

Vinted
The largest online international C2C marketplace in Europe dedicated to second-hand fashion
marketplace & ecommerce / fashion
vinted.comVilnius, Lithuania
2008
€232m
SERIES E
€1bn
500-1000
Sifted Take
Lithuanian startup Vinted tapped into the ever-trending second hand clothing market early on in 2008 — a critical space for the circular economy. It’s still growing steadily, with a 50% increase in its team and an additional 11m users across 12 markets in one year. We think it’s got a promising 2021 ahead, especially after acquiring Dutch competitor United Wardrobe in late 2020.

Volta Trucks
Creating an all electric truck specifically to be used in and around cities and urban areas
transportation / energy
voltatrucks.comSigtuna, Sweden
2019
€20m
EARLY VC
€73-109m
10-50

Volta Trucks
Creating an all electric truck specifically to be used in and around cities and urban areas
transportation / energy
voltatrucks.comSigtuna, Sweden
2019
€20m
EARLY VC
€73-109m
10-50

WeDontHaveTime
The world's largest social media network for climate action
social media / media
wedonthavetime.orgInverness, UK
2017
€1m
EARLY VC
€13-20m
10-50
Sifted Take
WeDontHaveTime claims to be the world’s largest social network for climate action — with 700k members.
In March 2021, it closed a $3m Series A that included angel investors Fabrice Grinda, Jan Ståhlberg and Marco Rodzynek. In 2020 it partnered with accelerator programme Sting to find climate ideas for its newest startup programme.
Based in Inverness, the ad-free app allows users to access climate news and contact climate leaders — and it runs on renewable energy.

WeDontHaveTime
The world's largest social media network for climate action
social media / media
wedonthavetime.orgInverness, UK
2017
€1m
EARLY VC
€13-20m
10-50
Sifted Take
WeDontHaveTime claims to be the world’s largest social network for climate action — with 700k members.
In March 2021, it closed a $3m Series A that included angel investors Fabrice Grinda, Jan Ståhlberg and Marco Rodzynek. In 2020 it partnered with accelerator programme Sting to find climate ideas for its newest startup programme.
Based in Inverness, the ad-free app allows users to access climate news and contact climate leaders — and it runs on renewable energy.

WindCity
Small wind and hydrocicles turbines
clean energy / manufacturing
windcity.it/enRovereto, Italy
2016
N/A
1-10

WindCity
Small wind and hydrocicles turbines
clean energy / manufacturing
windcity.it/enRovereto, Italy
2016
N/A
1-10

Winnow
Develops artificial intelligence tools to help chefs run more profitable and sustainable kitchens
food logistics and delivery / food
winnowsolutions.comLondon, UK
2013
€22m
DEBT
€44-65m
50-100

Winnow
Develops artificial intelligence tools to help chefs run more profitable and sustainable kitchens
food logistics and delivery / food
winnowsolutions.comLondon, UK
2013
€22m
DEBT
€44-65m
50-100

X1 Wind
Disruptive floating platform developing a floating wind platform for deep waters
energy / manufacturing
x1wind.comBarcelona, Spain
2017
€11m
EARLY VC
€16-24m
10-50

X1 Wind
Disruptive floating platform developing a floating wind platform for deep waters
energy / manufacturing
x1wind.comBarcelona, Spain
2017
€11m
EARLY VC
€16-24m
10-50

Xampla
A natural plastic alternative entirely made from peas
energy / manufacturing
xampla.comCambridge, UK
2018
€10m
SEED
€29-43m
N/a
Sifted Take
The plant protein market is developing fast, with companies developing plant-based products in all sorts of ways.
Xampla, a three-year-old Cambridge University spinout, is creating a plant-protein alternative to single-use plastics. It kicked off 2021 with £6.2m of fresh funds in a round led by Horizon Ventures.

Xampla
A natural plastic alternative entirely made from peas
energy / manufacturing
xampla.comCambridge, UK
2018
€10m
SEED
€29-43m
N/a
Sifted Take
The plant protein market is developing fast, with companies developing plant-based products in all sorts of ways.
Xampla, a three-year-old Cambridge University spinout, is creating a plant-protein alternative to single-use plastics. It kicked off 2021 with £6.2m of fresh funds in a round led by Horizon Ventures.
Ynsect
Transforms insects into nutrient resource for agriculture
food / innovative food; agritech
ynsect.comÉvry, France
2011
€214m
DEBT
€500-750m
100-500
Sifted Take
Growing global demand for food is putting a squeeze on available land and one French startup says it has the answer: indoor insect farming.
In 2020, Ynsect raised $224m from investors including Hollywood star Robert Downey Jr.’s Footprint Coalition to build a second insect farm in Amiens in northern France.
The company breeds mealworms that produce proteins for livestock, pet food and fertilizers, and will use the funds to build what it says will be the world’s largest insect farm.
The idea of eating bugs has been getting some consumer traction with a few supermarkets stocking grub-based food. But Ynsect has its sights mainly on the more prosaic $500bn animal feed market at the moment.
The challenge for Ynsect is regulation (weirdly the rules on what animals are allowed to eat are even stricter than the ones for humans) but also economics, as for now it’s reasonably expensive as a protein source.
Ynsect’s market at the moment is mainly hypoallergenic dog food because pampered pets are an area where the cost of the product is less of a consideration.
Further reading: Ynsect CEO Antoine Hubert on entrepreneurship & edible insects
Insect-farming startup Ÿnsect extends Series C funding to $372m
Ynsect
Transforms insects into nutrient resource for agriculture
food / innovative food; agritech
ynsect.comÉvry, France
2011
€214m
DEBT
€500-750m
100-500
Sifted Take
Growing global demand for food is putting a squeeze on available land and one French startup says it has the answer: indoor insect farming.
In 2020, Ynsect raised $224m from investors including Hollywood star Robert Downey Jr.’s Footprint Coalition to build a second insect farm in Amiens in northern France.
The company breeds mealworms that produce proteins for livestock, pet food and fertilizers, and will use the funds to build what it says will be the world’s largest insect farm.
The idea of eating bugs has been getting some consumer traction with a few supermarkets stocking grub-based food. But Ynsect has its sights mainly on the more prosaic $500bn animal feed market at the moment.
The challenge for Ynsect is regulation (weirdly the rules on what animals are allowed to eat are even stricter than the ones for humans) but also economics, as for now it’s reasonably expensive as a protein source.
Ynsect’s market at the moment is mainly hypoallergenic dog food because pampered pets are an area where the cost of the product is less of a consideration.
Further reading: Ynsect CEO Antoine Hubert on entrepreneurship & edible insects
Insect-farming startup Ÿnsect extends Series C funding to $372m

ZEG Power AS
Creating carbon zero hydrogen through carbon sequestration
energy / B2B
zegpower.comFornebu, Norway
2008
N/A
N/A
10-50

ZEG Power AS
Creating carbon zero hydrogen through carbon sequestration
energy / B2B
zegpower.comFornebu, Norway
2008
N/A
N/A
10-50

Zeleros
Zeleros is leading the hyperloop development, already considered as "the fifth means of transportation"
transportation / vehicle production
zeleros.comValencia, Spain
2016
€7m
EARLY VC
€28-42m
10-50

Zeleros
Zeleros is leading the hyperloop development, already considered as "the fifth means of transportation"
transportation / vehicle production
zeleros.comValencia, Spain
2016
€7m
EARLY VC
€28-42m
10-50
Logos provided by Clearbit