Company lists · Data refreshed September 2026
Top 25 Cloud email services worldwide
RevenueBase identified 1,125 cloud email services worldwide as of September 2026 and tracks 171,185 professional contacts across them, including 15,130 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.
This list covers cloud email services 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 27, 2026. Country and city lists for cloud email services 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 cloud email services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 156,457 contacts → | ||||
Partial evidence “Launched in 2006, Amazon Web Services (AWS) began exposing key infrastructure services to businesses in the form of web services - now widely known as cloud computing.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 460 contacts → | ||||
Partial evidence “Noovle, within the TIM Group, aims to become the leader for Italian cloud services.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 305 contacts → | ||||
Partial evidence “E2E Cloud is amongst India's fastest growing accelerated computing platform in India.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 295 contacts → | ||||
Partial evidence “Fastmail is email, just better!” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 284 contacts → | ||||
Partial evidence “27+ Years of Excellence in providing Cloud Computing Solutions in India AWS DevOps, Microsoft Workload and Resiliency Competent AWS Premier Consulting Partner Among the top 10…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 282 contacts → | ||||
Partial evidence “Infiflex Technologies Private Limited was established in 2010 in Kolkata, India with a vision to transform information technology in the cloud environment.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 181 contacts → | ||||
Partial evidence “Synacor is a cloud-based software and services company headquartered in Buffalo, New York with offices across the globe.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 148 contacts → | ||||
Partial evidence “Titan is an email suite built specifically for professionals and small businesses.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 128 contacts → | ||||
Partial evidence “COMING is the first cloud provider in Serbia that has been providing cloud services since 2009.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 128 contacts → | ||||
Indirect evidence “Prezados clientes e amigos.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 113 contacts → | ||||
Partial evidence “AppRiver, an OpenText company, company, is a channel-first provider of cloud-enabled security and productivity services, with a 4,500-strong reseller community that protects…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 109 contacts → | ||||
Partial evidence “Azalio Technologies is a specialized Cloud, Automation, and OSS/BSS Solutions company with deep roots in Telecom.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 97 contacts → | ||||
Partial evidence “Exoscale is a European sovereign cloud service provider offering a full range of infrastructure solutions, including virtual machines, S3-compatible object storage, scalable…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 92 contacts → | ||||
Indirect evidence “OnduCloud es un proveedor de servicios de Nube Privada y Especialistas en ciberseguridad.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 86 contacts → | ||||
Partial evidence “We provide a wide variety of services for design and building, operation and maintenance, monitoring 24/7, technical support of the Cloud (AWS and GCP, Azure).” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 80 contacts → | ||||
Indirect evidence “Our general philosophy of business at eSky IT is that we provide our customers with what they exactly need, when they need it, nothing less but often more.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 79 contacts → | ||||
Partial evidence “We pride ourselves on our ability to provide businesses with secure, reliable, and cost-effective cloud solutions that can help them optimize their operations and achieve their…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 72 contacts → | ||||
Partial evidence “SKYLINE Cloud Services aggregates Small Business desktop software and cloud solutions, applies Digital Rights Management (DRM), integrates them, and delivers turn-key Cloud-based…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 71 contacts → | ||||
Partial evidence “At Cloud First, we are passionate about helping businesses succeed in the cloud.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 70 contacts → | ||||
Indirect evidence “Oktawave to polska platforma publicznej chmury obliczeniowej.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 69 contacts → | ||||
Indirect evidence “CBNCloud adalah virtualisasi dari infrastruktur, platform dan perangkat lunak melalui Internet, yang memungkinkan perusahaan untuk memiliki sumber-sumber daya yang fleksibel…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 66 contacts → | ||||
Partial evidence “Sixth Force Solutions: Empowering SMBs with Tailored Cloud Solutions.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 55 contacts → | ||||
Partial evidence “We are Revolgy - provider of flexible cloud solutions and a team of cloud experts who are here to help you improve your business with the latest technologies and innovations.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 51 contacts → | ||||
Partial evidence “Somos provedores de soluções em Cloud Computing, com o objetivo de aumentar a produtividade e segurança dos nossos clientes.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 51 contacts → | ||||
Partial evidence “Business Email Accounts, Calendaring, Contacts and Collaboration Services for Your Business from BlueTie.” Source: RevenueBase Database · checked Sep 27, 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: cloud email services. 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 cloud email services.
- Partial evidence
- Its own public description names part of cloud email services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name cloud email services. 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 1,125 cloud email services worldwide
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Cloud email services worldwide at a glance
As of Sep 27, 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 cloud email services, 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 cloud email services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “cloud email services”. 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 cloud email services), 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 cloud email services, 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, 15,130 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 27, 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.
Cloud email services by location
7 lists · largest firstEvery Cloud email services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Cloud email services based in the United States188
- Cloud email services based in India114
- Cloud email services based in Brazil60
- Cloud email services based in the United Kingdom51
- Cloud email services based in Canada36
- Cloud email services based in the Netherlands32
- Cloud email services based in Germany26
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 cloud email services, 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 cloud email services are there worldwide?
RevenueBase identified 1,125 cloud email services 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?
Amazon WEB Services AWS, headquartered in Seattle, tops this list with the largest team on record.
Which country has the most cloud email services?
The United States leads with 188 companies, followed by India (114) and Brazil (60). Every cloud email services list by country and city is linked on this page.
Which city has the most cloud email services?
Sao Paulo leads with 22 headquartered companies, followed by Mumbai (14) and London (13).
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 15,130 verified decision-maker contacts tracked across these 1,125 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 27, 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.