XOSTOR: Virtualization Storage Ledger 2026 Scorecard

	’26
Data services core
Resilience and HA
Performance and protocols
Hypervisor integration
Scale and topology
Data protection and DR
Security
Operations and automation
Hardware and deployment freedom
Kubernetes and containers

Part of the Virtualization Storage Ledger (edition 2026-10-16). How the scores work: methodology.

Snapshot

Type: product
Owner: Vates (Grenoble, France; founder-controlled; first outside funding of EUR 30 million from IRIS and Bpifrance announced 2026-10-06)
Engine: LINSTOR and DRBD from LINBIT, driven by the Vates LinstorSR storage driver in the XCP-ng storage manager (LGPL-2.1)
Licence: Commercial add-on of Vates VMS: XOSTOR Essential 2,400 per year (fixed, minimum three hosts, business days), Pro 800 per host per year, Enterprise 1,200 per host per year with 24/7 (price card read 2026-10-15, currency shown as both $ and euro); XCP-ng and Xen Orchestra are open source
Latest release: XCP-ng 8.3 LTS October 2026 Updates #1 (2026-10-05): automatic LINSTOR database backups, SR creation and RAW volume fixes; no XOSTOR version number is published
Support lifecycle: Supported only on up-to-date XCP-ng 8.3 pools; 8.3 LTS supported until 2028-11-30; XCP-ng 8.2 LTS ended 2025-09-16
Next milestone: XCP-ng 9.0 (no date); a next-generation platform covering storage, security and AI-related workloads funded in 2026-10, no dates
Hypervisors: XCP-ng 8.3 only, deployed and managed from Xen Orchestra (XOSTOR documentation, read 2026-10-15); platform-bound by design
Tier: Software-defined storage
Archetype: Dependable builder, young product
Evidence grade: B. The XOSTOR documentation, the XCP-ng release and lifecycle pages, the Vates price card and the funding and partner posts were read from Vates and XCP-ng sites. XOSTOR carries no version number of its own, so changes are dated by XCP-ng 8.3 update posts. Price history, the first public beta date and the LINSTOR and DRBD versions packaged were not found.

Scope of the scores: XOSTOR packages LINBIT's LINSTOR and DRBD (scored separately as linstor) for one hypervisor. The scores here cover what Vates ships and supports on XCP-ng 8.3, not the engine's wider capability. XOSTOR shipped as a beta in XCP-ng 8.3 (2024-10-07) and is scored from 2025, when Vates declared it supported (2025-06-16).

Scorecard

Dimension	Score	Direction
Capability today	44.9 / 100	higher is better
Momentum since 2025	+0.0 points	higher is better
Credibility	16.0 / 25	higher is better
Commercial risk	10.0 / 25	lower is better
Technical lock-in	7.5 / 25	lower is better
Integrator fit	10.0 / 20	higher is better
AI leverage	1.5 / 20	higher is better
Ledger Index	47.3 / 100	balanced weights; see the methodology

Capability by domain, 2015 to today

Scores 0 to 5 against fixed anchors; total is weighted to 100.

Domain (weight)	2015	2019	2022	Today
Data services core (15)	n/a	n/a	n/a	2
Resilience and HA (15)	n/a	n/a	n/a	3
Performance and protocols (12)	n/a	n/a	n/a	2
Hypervisor integration (12)	n/a	n/a	n/a	3
Scale and topology (10)	n/a	n/a	n/a	2
Data protection and DR (10)	n/a	n/a	n/a	2
Security (8)	n/a	n/a	n/a	1
Operations and automation (8)	n/a	n/a	n/a	3
Hardware and deployment freedom (5)	n/a	n/a	n/a	3.5
Kubernetes and containers (5)	n/a	n/a	n/a	0
Total / 100	n/a	n/a	n/a	44.9

Year by year: 2025: 44.9 · 2026: 44.9

Direction, 2023 to 2026

Each release item carries one theme and one driver (V vision, C customer need, M market window, U upstream, P portfolio).

Date	Item	Theme	Driver
2024-10	XCP-ng 8.3 ships XOSTOR as a beta	Packaging	C
2024-10	XCP-ng 8.3: QCOW2 for disks above 2 TB (preview), 4K native disks, vTPM	Data services	C
2025-06	XCP-ng 8.3 becomes LTS; XOSTOR officially supported on up-to-date pools	Packaging	C
2026-02	Vates 2026 Partner Program adds a distributor tier	Packaging	M
2026-03	Vates Alliance Network: public compatibility list and solution guides announced	Hypervisor integration	M
2026-05	QCOW2 GA in XCP-ng 8.3 for disks up to 16 TiB; XOSTOR stays on VHD with a 2040 GiB cap	Data services	C
2026-06	Vates and DataCore validate StarWind VSAN and SANsymphony as external storage for XCP-ng	Hypervisor integration	M
2026-10	October 2026 Updates #1: automatic LINSTOR database backups on the pool master and the DRBD volume, SR creation and RAW volume fixes	Resilience	C
2026-10	EUR 30 million from IRIS and Bpifrance for a next-generation platform covering storage, security, automation and AI-related workloads	Packaging	V
2026-10	XCP-ng 8.3 security update (2026-10-13)	Security	U

Centre of gravity: Packaging (4), Data services (2), Hypervisor integration (2)
Blind spots (no items): Performance, Scale, Data protection, Operations, Hardware, Kubernetes, Licensing, AI
Driver mix: Vision 10%, Customer need 50%, Market window 30%, Upstream 10%, Portfolio 0%
Idea-to-need index: 0.11 (0 = demand-pulled, 1 = thesis-pushed)

Credibility: 16.0 / 25

Criterion	Score	Basis
Cadence	3.5	XCP-ng 8.3 updates every few weeks with dated posts; XOSTOR changes ride on them without a version of their own
Roadmap transparency	3.5	Public documentation, GitHub and forum; no dated storage roadmap
Say-do	3	XOSTOR went from beta (2024-10) to supported (2025-06) in eight months; QCOW2 reached GA for XCP-ng but not for XOSTOR
Velocity	2.5	2026 brought fixes and database backups for XOSTOR; the storage feature work (QCOW2) landed outside it
Lifecycle stability	3.5	LTS until 2028-11-30 with a documented upgrade path from 8.2.1 pools; XCP-ng 9.0 undated

Commercial risk: 10.0 / 25 (lower is better)

Criterion	Score	Basis
Price and licence volatility	2	Published price card; a 2026 customer story mentions licensing changes without detail; no history on the record
Purchase constraints	2.5	Minimum three hosts, Essential tier at a fixed price, 24/7 only with a Vates VMS subscription; the open-source base is free
Channel and access	1.5	Open downloads and updates; partner programme open to MSPs, resellers, CSPs and distributors
Owner stability	2	Founder-controlled; first outside funding in 2026 from a growth fund and a public bank
Cost of staying supported	2	Updates free; support is an annual subscription; XOSTOR supported only on up-to-date pools

Technical lock-in: 7.5 / 25 (lower is better)

Criterion	Score	Basis
Formats	1	VHD on DRBD and LVM; convertible with standard tools
Export path	1.5	Xen Orchestra export of VHD and OVA; DRBD pools readable only through XCP-ng
Stack coupling	3	XCP-ng 8.3 only, deployed from the Xen Orchestra Appliance, replication factor fixed at creation
Hardware / cloud coupling	0.5	Any x86 server; no cloud attach
Skills and tooling coupling	1.5	XCP-ng and Xen Orchestra administration over standard Linux skills; LINSTOR and DRBD underneath

Integrator fit: 10.0 / 20

Criterion	Score	Basis
Partner programme openness	3.5	MSP, reseller, CSP and distributor types with a 2026 programme; terms not published
Multi-tenancy and self-service	2	Xen Orchestra resource sets and self-service at platform level (not re-verified); none in XOSTOR
API and infrastructure-as-code	2.5	Xen Orchestra REST and JSON-RPC API; Terraform and Ansible for Xen Orchestra not verified in this edition
Skills and certification	2	Vates training and support; no certification programme found

AI leverage: 1.5 / 20

How the product uses AI, scored per year like capability. Only GA counts.

Criterion	2019	2022	Today	Latest step
AI workload infrastructure	n/a	n/a	0	2025: None
AI platform stack	n/a	n/a	0	2025: None
AI-assisted operations	n/a	n/a	0	2025: None
Agent openness	n/a	n/a	1.5	2025: Managed through the Xen Orchestra API; no storage-specific API or MCP server

Year by year: 2025: 1.5 · 2026: 1.5

AI say-do, 2023 to 2026: 1 AI items announced; 0 GA, 0 still preview, 1 pending, 0 dropped. The one item is the 2026-10 funding statement that the next platform will cover AI-related workloads.

XOSTOR has no AI features and Vates has announced none for it beyond a funding statement about AI-related workloads on the next platform. Agents reach it only through the Xen Orchestra API.

Reading

XOSTOR scores as a young, narrow product: a supported way to get shared-nothing replicated storage on XCP-ng without a SAN, and little more. Resilience and operations are solid for its size, because DRBD quorum and Xen Orchestra deployment do the work, while data services, protocols, security and scale sit at the basic level with hard limits (2040 GiB per disk, three to seven hosts, no encryption at rest). Vates publishes its prices and dates and shipped the beta to supported status in eight months. A buyer should confirm that the VHD disk cap and the fixed replication factor fit their largest VMs before building a pool.

Open questions and items to re-score

First public XOSTOR beta date and the LINSTOR and DRBD versions packaged in XCP-ng 8.3 were not found.
The currency on the Vates price page is ambiguous and no price history was found.
Whether XOSTOR can be deployed without a Vates VMS subscription is not stated.
LINBIT says XCP-ng clusters can reach 31 nodes; the XCP-ng documentation says seven hosts per XOSTOR pool.
QCOW2 and larger disks on XOSTOR are not announced; TWINSTOR is a separate tech preview without a date.
Xen Orchestra Terraform and Ansible support and self-service were not re-verified for this edition.