# Companies using btrfs

241 companies in our data use btrfs, and 130 of them name it in job posts they wrote. From October 2025 to August 2026, 109 job posts named it. It comes up most in Data Center Engineer job posts.

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

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

Oracle and NCR Voyix have the most job posts naming btrfs, with 89 and 47. NCR Corporation has named it in job posts the longest of the five companies in the table, since February 2023.

| Company | Job posts | Recent job post |
|---|---:|---|
| [Oracle](https://sumble.com/orgs/oracle) | 89 | "Storage and Filesystems (iSCSI, Fibre Channel, NFS, ZFS, Btrfs, block layer, and filesystem layer)" (Senior Principal Platform Software Engineer, Aug 27, 2026) |
| [NCR Voyix](https://sumble.com/orgs/ncrvoyix) | 47 | "Storage and file systems such as ZFS, DRBD, RAID, LVM, btrfs, or CEPH" (Linux Shift Senior Support, Oct 22, 2026) |
| [NCR Corporation](https://sumble.com/orgs/ncr) | 46 | "Resilient and redundant file systems (ideally ZFS and DRBD, alternatively advanced knowledge of similar such as btrfs, LVM, RAID, CEPH, clustering solutions etc.)" (Professional Services Engineer – Virtualization, Jan 21, 2026) |
| [DCI Solutions](https://sumble.com/orgs/dci-solutions) | 17 | "Experience with ext4, XFS, Btrfs and knowing when to use each Knowledge of RAID levels and disk management techniques Experience deploying…" (Storage Engineer with Security Clearance, Jun 3, 2026) |
| [Cohere Technology Group](https://sumble.com/orgs/cohere-technology-group) | 17 | "…file formats (e.g., ELF), file system internals (e.g., NTFS, ext2, btrfs), OS-specific mandatory and discretionary access control mechanisms…" (Android Developer with Security Clearance, Jul 27, 2026) |

## Is hiring for btrfs growing?

0.03 in every 10,000 job posts named btrfs from June to August 2026, against 0.08 from March to May. These are small numbers of job posts, so a few companies can move them.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 5 | 1,413,673 | 0.04 |
| Nov 2025 | 12 | 1,822,119 | 0.07 |
| Dec 2025 | 7 | 1,236,103 | 0.06 |
| Jan 2026 | 13 | 1,828,002 | 0.07 |
| Feb 2026 | 8 | 1,856,647 | 0.04 |
| Mar 2026 | 15 | 1,850,711 | 0.08 |
| Apr 2026 | 14 | 1,728,886 | 0.08 |
| May 2026 | 16 | 1,821,509 | 0.09 |
| Jun 2026 | 6 | 1,909,496 | 0.03 |
| Jul 2026 | 6 | 1,815,180 | 0.03 |
| Aug 2026 | 7 | 1,835,698 | 0.04 |

## How many companies named btrfs in a job post for the first time in recent months?

From June to August 2026, 7 companies posted their first job naming btrfs; 12 did from March to May. Over the 11 months from October 2025, 31 companies posted their first job naming it.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 12 |
| June to August 2026 | 7 |
| October 2025 to August 2026 | 31 |

Companies whose first job post naming it appeared in that period. Recruiters, staffing firms and job boards are left out.

## How do we know which companies use btrfs?

Employees' profiles add 111 companies to the 130 that name btrfs in job posts. 6 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name btrfs | 130 | 54% |
| Employees' profiles list btrfs | 111 | 46% |

## What size are the companies that use btrfs?

33% of btrfs users are companies with 50 to 999 employees, close to the mix on the typical tech page. 60 of its companies have fewer than 50 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 25% | 22% |
| 50 to 999 | 33% | 38% |
| 1,000 to 5,000 | 15% | 17% |
| Over 5,000 | 28% | 23% |

## Where are btrfs companies based?

More than half of btrfs companies are in the United States (51%). Germany is second, at 9.4%.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 114 | 51% | 43% |
| Germany | 21 | 9.4% | 4.4% |
| France | 16 | 7.1% | 4.6% |
| United Kingdom | 14 | 6.2% | 6.4% |
| Canada | 8 | 3.6% | 3.6% |
| India | 7 | 3.1% | 6.9% |

## Which roles mention btrfs most?

Data Center Engineer is the most common role, in 17% of job posts naming btrfs. Mobile Developer is second, at 15%.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Data Center Engineer | 17% | 18 | 5 | 2 |
| Mobile Developer | 15% | 16 | 10 | 3 |
| Infrastructure Engineer | 13% | 14 | 7 | 2 |
| Software Engineer | 7.3% | 8 | 2 | 1 |
| Customer Engineer | 6.4% | 7 | 3 | 3 |
| IT Support | 5.5% | 6 | 2 | 2 |

## Which companies started naming btrfs in job posts recently?

10 companies with 50 or more employees picked up btrfs in their job posts from April to August 2026.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [indurad](https://sumble.com/orgs/indurad) | 2 |
| Commercial | [Cast AI](https://sumble.com/orgs/cast-ai) | 1 |
| Commercial | [Aqovia](https://sumble.com/orgs/aqovia) | 1 |
| Mid-market | [Commvault](https://sumble.com/orgs/commvault) | 2 |
| Mid-market | [Hyve Solutions](https://sumble.com/orgs/hyve-solutions) | 2 |
| Mid-market | [Argonne National Laboratory](https://sumble.com/orgs/argonne-national-laboratory) | 1 |
| Mid-market | [NCC Group](https://sumble.com/orgs/ncc-group) | 1 |
| Enterprise | [Altran](https://sumble.com/orgs/capgemini-engineering) | 1 |
| Enterprise | [University of Pennsylvania](https://sumble.com/orgs/university-of-pennsylvania) | 1 |
| Enterprise | [Crédit Agricole CIB](https://sumble.com/orgs/credit-agricole-cib) | 1 |

Companies that named btrfs in a job post for the first time between April and August 2026, ranked by their job posts in those months. AI-native companies get a group of their own, whatever their size. Recruiters and job boards are left out.

## What else do btrfs companies use?

Btrfs companies are 600 times as likely as similar companies to use ext4: 38% of them, against 0.06%. XFS is 439 times as common as usual, at 35%.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| ext4 | 26 | 38% | 0.06% | 600 times |
| XFS | 24 | 35% | 0.08% | 439 times |
| Oracle ZFS | 35 | 51% | 0.21% | 238 times |
| NVMe | 16 | 23% | 0.15% | 155 times |
| UEFI | 10 | 14% | 0.1% | 149 times |
| SATA | 13 | 19% | 0.13% | 143 times |
| WinDbg | 11 | 16% | 0.13% | 127 times |
| BIOS | 13 | 19% | 0.18% | 105 times |

Shares are out of the 69 companies whose job posts name btrfs, not counting firms whose job posts name almost every technology.

## 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.