Company lists · Data refreshed September 2026
Top 25 Open source cloud platforms worldwide
RevenueBase identified 156 open source cloud platforms worldwide as of September 2026 and tracks 2,845 professional contacts across them, including 198 with verified work emails. The United States is the largest market and San Francisco the largest hub.
This list covers open source cloud platforms worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026. Country and city lists for open source cloud platforms follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest open source cloud platforms worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 837 contacts → | ||||
Partial evidence “Railway’s mission is to build the cloud computing stack that unburdens you, so you can focus more on what matters to you.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 471 contacts → | ||||
Strong evidence “Yandex Cloud is a public cloud platform where companies can create and develop projects using Yandex's scalable computing power, advanced technologies, and infrastructure.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 218 contacts → | ||||
Partial evidence “At Annapurna Labs we are inventing the next generation of cloud computing infrastructure and the compute/machine learning/storage/networking industry as a whole.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 103 contacts → | ||||
Strong evidence “Linode is now Akamai Cloud, the world’s most distributed cloud platform.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 99 contacts → | ||||
Strong evidence “OpenStack is an open source software project Hosted by the OpenInfra Foundation for creating private and public clouds.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 89 contacts → | ||||
Indirect evidence “We are helping the world’s leading organizations drive accelerated time to market, increased product quality and operational efficiency by leveraging composability.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 50 contacts → | ||||
Strong evidence “OpenNebula Systems is the open source company behind OpenNebula, supporting its community and providing SLA-based support, consulting, and managed cloud services to corporate…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 30 contacts → | ||||
Strong evidence “Control Plane is a cloud virtualization platform that enables devops teams to compose any combination of cloud infrastructure - bare metal, VMs, k8s, AWS, GCP, Azure, OCI - into…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 23 contacts → | ||||
Partial evidence “Configr provides the easiest way to manage your servers and deploy your applications on your own private cloud; from anywhere you want, to anywhere it is.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 23 contacts → | ||||
Strong evidence “Kangaroot has more than 25 years Open Source Expertise.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 20 contacts → | ||||
Strong evidence “Datum is building the world’s first open network cloud, a neutral place where Alt Clouds, tech incumbents, and digital leaders can programmatically interact with their unique…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 19 contacts → | ||||
Partial evidence “Your data, your platform!” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 17 contacts → | ||||
Partial evidence “Open, Affordable, Predictable.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 16 contacts → | ||||
Partial evidence “OpenMetal delivers hosted private cloud and bare metal infrastructure that gives organizations a real alternative to building their own private cloud or committing to a…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 14 contacts → | ||||
Strong evidence “Open, free, and portable cloud” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 13 contacts → | ||||
Partial evidence “Skyloud est une entreprise spécialisée dans les nouvelles technologies Cloud.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 9 contacts → | ||||
Partial evidence “Welcome to 3HCloud - Your Trusted Cloud Partner Discover the power of OpenStack with 3HCloud, where we deliver industry-leading, flexible, and scalable cloud solutions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 9 contacts → | ||||
Partial evidence “Cloud Computing, la revolución ya está en marcha Los años 90 fueron la década del ordenador personal, el fue el boom de internet, la siguiente revolución es el Cloud Computing, si…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 9 contacts → | ||||
Partial evidence “Platina is the transformative solution that empowers your organization's hybrid cloud journey.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 8 contacts → | ||||
Partial evidence “VNPT Cloud - The comprehensive cloud computing ecosystem” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 7 contacts → | ||||
Partial evidence “HVE ConneXions was created to combine proven virtualization solutions with state of the art, best of breed hardware to support next-generation Cloud requirements.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 7 contacts → | ||||
Strong evidence “Our business philosophy is based upon getting the best out of free and open source software.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 6 contacts → | ||||
Partial evidence “MultiPortal is redefining how cloud infrastructure is managed.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 5 contacts → | ||||
Partial evidence “At Scaleblade we are developing a suite of cloud compute tools to help keep you (and your business) online.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 5 contacts → | ||||
Partial evidence “LayerStack is a reputable cloud service provider that offers a stable and high-performance infrastructure as a service (IaaS) cloud to help businesses achieve their goals.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: open source cloud platforms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names open source cloud platforms.
- Partial evidence
- Its own public description names part of open source cloud platforms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name open source cloud platforms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 156 open source cloud platforms worldwide
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Open source cloud platforms worldwide at a glance
As of Sep 29, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among open source cloud platforms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for open source cloud platforms are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “open source cloud platforms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names open source cloud platforms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among open source cloud platforms, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 198 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Open source cloud platforms by location
1 lists · largest firstEvery Open source cloud platforms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names open source cloud platforms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many open source cloud platforms are there worldwide?
RevenueBase identified 156 open source cloud platforms worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Railway, headquartered in San Francisco, tops this list with the largest team on record.
Which country has the most open source cloud platforms?
The United States leads with 37 companies. Every open source cloud platforms list by country and city is linked on this page.
Which city has the most open source cloud platforms?
San Francisco leads with 4 headquartered companies, followed by Toronto (3) and Amsterdam (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 198 verified decision-maker contacts tracked across these 156 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.