# Companies using ext3

170 companies in our data use ext3, and 85 of them name it in job posts they wrote.

Data as of November 9, 2026. Source: Sumble.

## Which companies name ext3 in the most job posts?

The companies with the most job posts naming ext3 are DXC Technology (15), HCLTech (14) and Newfold Digital (12). DXC Technology is the newest of the five companies in the table, with its first job post naming it in September 2024.

| Company | Job posts | Recent job post |
|---|---:|---|
| [DXC Technology](https://sumble.com/orgs/dxc-technology) | 15 | "Storage and Filesystems (VXFS, ZFS, EXT3, EXT4, XFS, UFS, SVM)" (linux engineer, Nov 7, 2025) |
| [HCLTech](https://sumble.com/orgs/hcltech) | 14 | "…and Operating system related issue Administer and configure various FS like JFS,ext2, ext3, OCFS & Pseudo FS Capacity planning and fine tune system for optimal performance Work Experience in NAS…" (SOLUTION ARCHITECT, Apr 15, 2024) |
| [Newfold Digital](https://sumble.com/orgs/newfold-digital) | 12 | "lsof, strace, ps/top/atop/dstat, grub boot config & systems rescue, fstab/disk labels, ext3/ext4, IPtables…" (System Admin Support Associate, Jun 29, 2025) |
| [Path Infotech Ltd.](https://sumble.com/orgs/path-infotech) | 8 | "File systems management (ext3 and ext4)." (Hiring for System administrator, Dec 17, 2023) |
| [Like Minded Labs](https://sumble.com/orgs/like-minded-labs) | 8 | "Strong knowledge on storage technologies: (NTFS, HPFS, Ext3, Ext4, xfs, Samba/CIFS, NFS, iSCSI, S3, zfs, CEPH, Swift, etc)" (Sr. IT Specialist, Dec 17, 2023) |

## How do we know which companies use ext3?

The evidence for ext3 is close to even: 50% of these companies name it in job posts, and 50% come from employees' profiles. 5 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name ext3 | 85 | 50% |
| Employees' profiles list ext3 | 85 | 50% |

## What size are the companies that use ext3?

Big companies stand out among ext3 users: companies with more than 5,000 employees are 35% of them, against 23% on the typical tech page. 30 of its companies have fewer than 50 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 18% | 22% |
| 50 to 999 | 30% | 38% |
| 1,000 to 5,000 | 17% | 17% |
| Over 5,000 | 35% | 23% |

## Where are ext3 companies based?

ext3 is concentrated in the United States, home to 52% of the companies that use it. India is second, at 12%.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 83 | 52% | 43% |
| India | 19 | 12% | 6.9% |
| United Kingdom | 8 | 5% | 6.4% |
| Canada | 7 | 4.3% | 3.6% |
| France | 6 | 3.7% | 4.6% |
| Japan | 6 | 3.7% | 0.63% |

## About this data

Sumble built this page. Sumble gives sales, marketing and other GTM teams technographics and hiring signals for the companies they sell to: the technologies each company uses, which teams are hiring and for what, and who reports to whom. That helps a team know who to contact, why now, and what to say.

Sumble covers more than 3.6 million companies, 93 million job posts collected since 2022 and 194 million employee profiles, and tracks more than 37,000 technologies. It finds which technologies a company uses by reading its job posts and its employees' public profiles.

Sumble has a free plan, and the same data is available through its API and MCP server.

A company counts when its own job posts or its employees' public profiles name the technology. Hiring is that technology's share of all job posts collected each month. Quotes are copied word for word from the companies' job posts.

Every figure on this page comes from Sumble's own analysis, and you won't find it outside Sumble.