#8 of 21 S3-compatible object storage products · Updated October 2026
VAST review 2026
VAST Data Platform · Real innovator, many items pending
VAST ranks #8 of 21 S3-compatible object storage products in the Object Storage Ledger 2026, with a Ledger Index of 59.5 out of 100. VAST's S3 shares one namespace with NFS, SMB and block: STS, both lock modes and fast releases on certified platforms, with many 2026 items pending.
Scores
Source: Object Storage Ledger 2026, edition 2026-10-16. How each score works: methodology.
Pros
- Durability and resilience4/5
- Performance and scale4/5
- Protocols beyond S34/5
Cons
- Ecosystem and openness2/5
- Deployment freedom2.5/5
- Lifecycle and tiering2.5/5
What the Ledger says
VAST scores highest of the three file-first platforms on capability because its S3 side is documented in detail: STS, SSE-C, CORS, conditional reads, lifecycle rules and both lock modes, beside NFS, SMB, block and an event broker. Its limits are documented just as clearly: Object Lock cannot be used on a view that is also open over SMB or NFS, versioning cannot be turned off, and nothing tiers off the flash. Most 2026 announcements (CNode-X, PolicyEngine, TuningEngine, DataEnclave) have no GA date, and because the release notes carry no dates the direction list leans toward those announcements more than the shipped work does. A buyer planning to land backups on it should ask VAST for the Cohasset report and a current Veeam listing for the release they will run, and check that the view design allows Object Lock.
VAST has the deepest AI stack of the file-first platforms here, with vector indexing and compute clusters in its documented release notes. The rest of its 2026 AI programme is dated only as "by the end of 2026" or not at all, and there is no AI in its own operations and no MCP server.
Capability by area
Buying, lock-in and release record
Buying and licence (commercial risk)(lower is better)
- Price and licence volatility2.5
- No public prices; no change found
- Purchase constraints3.5
- Certified platforms only; capacity subscription in 100 TB increments (secondary sources)
- Channel and access2.5
- Public documentation; sold direct and through Cosmos partners (resellers, integrators, distributors, cloud providers)
- Owner stability3
- Private and venture-backed at a USD 30 billion valuation (2026-04); an IPO is reported as under consideration
- Cost of staying supported3
- Support windows not found; subscriptions transfer across enclosures (secondary sources)
Technical lock-in(lower is better)
- Formats3
- Proprietary layout with similarity-based data reduction; data readable over NFS, SMB and S3
- Export path1.5
- NFS, SMB and S3 reads; no replication to an external S3 target found
- Stack coupling3.5
- Own stack spanning storage, database and compute
- Hardware / cloud coupling3
- Certified platforms from VAST, Supermicro, HPE and Cisco, or VAST on Cloud; no commodity software install
- Skills and tooling coupling3
- Vendor tooling and a platform model (views, tenants, DataEngine) specific to VAST
Release credibility
- Cadence3.5
- Minor releases and service packs (5.5.0 up to SP6) with published upgrade paths; dates not published
- Roadmap transparency2.5
- Public knowledge base with detailed release notes; direction only in conference announcements; no roadmap
- Say-do3
- Compliance mode and the Veeam qualification shipped; CNode-X, PolicyEngine, TuningEngine and DataEnclave have no confirmed GA, with PolicyEngine and TuningEngine due by the end of 2026
- Velocity4
- 5.5.0 alone brought S3 CORS, If-Match, NFSv4.2 extended attributes, mTLS, block async replication, vector indexing and capacity quotas
- Lifecycle stability3
- Rapid minor and service pack churn, upgrade paths limited to listed source releases, hardware platform names that change
Partners and services
- Partner programme openness3.5
- Cosmos programme unified 2026-02-25 for resellers, integrators, technology alliances, distributors and cloud providers; OEM partners Supermicro, HPE and Cisco
- Multi-tenancy and self-service3.5
- Tenants with per-tenant and identity policies, STS and IAM roles; Polaris adds a multi-tenant control plane for cloud deployments
- API and infrastructure-as-code3
- REST API, CLI and Kubernetes CSI; Terraform and Ansible not found
- Skills and certification2.5
- No public certification found
Alternatives to VAST
Questions about VAST
Is VAST any good?
VAST ranks #8 of 21 S3-compatible object storage products in the Object Storage Ledger 2026, with a Ledger Index of 59.5 out of 100. Its strongest areas are durability and resilience, performance and scale, protocols beyond s3. Its weakest are ecosystem and openness, deployment freedom, lifecycle and tiering.
What are the best alternatives to VAST?
The closest by Ledger Index are Versity S3 Gateway (59.6), ObjectScale (59.1), Cloudian (60), FlashBlade (58.9).
How is VAST licensed and sold?
No public prices; no change found.
How much lock-in does VAST bring?
VAST scores 14 out of 25 on technical lock-in (lower is better). Export path: NFS, SMB and S3 reads; no replication to an external S3 target found.
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