Open source focus

Open Source Alternatives to Ark Climate

9 open source Climate Tech options similar to Ark Climate, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.

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United Manufacturing Hub Systems54
ManufacturingCologne, Germany$5.4M
An open-source data platform for manufacturers to access and structure machine data.
Open source · Self-hostable
Cardano55
Blockchain
A secure, scalable, and sustainable proof-of-stake blockchain platform for decentralized applications and smart contracts.
Open source · Self-hostable
Mozilla Firefox54
InternetSan Francisco, United States$2.3M
Open-source web browser focused on privacy, user control, and an open internet.
Open source · Self-hostable
Nextcloud52
Cloud ComputingNuremberg, Germany$63.0M
Open-source, self-hosted file sync and share and collaboration platform.
Open source · Self-hostable
Arduino46
Open SourceSomerville, United States$54.0M
Open-source hardware and software company providing microcontrollers and kits for digital devices.
Open source · Self-hostable
Apache HTTP Server18
Open SourceWakefield, United States
A free, open-source, cross-platform web server software managed by the Apache Software Foundation.
Open source · Self-hostable
EU
Eurostack10
SoftwareEurope
A European enterprise contributing to the development of sovereign digital infrastructure.
Open source · Self-hostable
EU
Euro-Office10
SoftwareEurope
A sovereign, open-source office suite for European enterprises and public administrations.
Open source · Self-hostable
XWiki2
SoftwareParis, France
Open-source enterprise wiki and collaboration software.
Open source · Self-hostable

Company	Sector	License	HQ	Funding	Score
United Manufacturing Hub SystemsAn open-source data platform for manufacturers to access and structure machine data.	Manufacturing	Open source · Self-hostable	Cologne, Germany	$5.4M	54
CardanoA secure, scalable, and sustainable proof-of-stake blockchain platform for decentralized applications and smart contracts.	Blockchain	Open source · Self-hostable	—	—	55
Mozilla FirefoxOpen-source web browser focused on privacy, user control, and an open internet.	Internet	Open source · Self-hostable	San Francisco, United States	$2.3M	54
NextcloudOpen-source, self-hosted file sync and share and collaboration platform.	Cloud Computing	Open source · Self-hostable	Nuremberg, Germany	$63.0M	52
ArduinoOpen-source hardware and software company providing microcontrollers and kits for digital devices.	Open Source	Open source · Self-hostable	Somerville, United States	$54.0M	46
Apache HTTP ServerA free, open-source, cross-platform web server software managed by the Apache Software Foundation.	Open Source	Open source · Self-hostable	Wakefield, United States	—	18
EUEurostackA European enterprise contributing to the development of sovereign digital infrastructure.	Software	Open source · Self-hostable	Europe	—	10
EUEuro-OfficeA sovereign, open-source office suite for European enterprises and public administrations.	Software	Open source · Self-hostable	Europe	—	10
XWikiOpen-source enterprise wiki and collaboration software.	Software	Open source · Self-hostable	Paris, France	—	2