#1 of 21 S3-compatible object storage products · Updated October 2026
Ceph RGW review 2026
Ceph RADOS Gateway (RGW, upstream) · Dependable builder
Ceph RGW ranks #1 of 21 S3-compatible object storage products in the Object Storage Ledger 2026, with a Ledger Index of 66.3 out of 100. The open-source S3 and Swift gateway inside IBM Storage Ceph and OpenShift Data Foundation: deep multisite durability, no vendor or support of its own.
Scores
Source: Object Storage Ledger 2026, edition 2026-10-16. How each score works: methodology.
Pros
- Durability and resilience5/5
- S3 API fidelity4.5/5
- Ecosystem and openness4.5/5
- Performance and scale4/5
Cons
No domain scores 2.5 or lower out of 5. Check the lock-in and buying notes below.
What the Ledger says
Ceph RGW has the highest capability score of the open-source engines because nearly every object feature a packaging vendor sells already exists upstream: active-active multisite, per-bucket placement, stretch mode, IAM accounts, Swift and cloud tiering. Immutability stays at 3.5 because no backup vendor has validated upstream RGW; the Cohasset assessment from 2023 is the strongest compliance evidence. Security stops at 4: there is no FIPS validation, and the 2026-08-19 releases fixed a CephX bypass and an STS token flaw that require every key to be renewed. A buyer running it without a vendor should check which stable series they run, because Squid reaches end of life around 2026-10-31, and who will patch the cluster and renew keys when the next advisory lands.
Ceph RGW has no AI in its own operation; its AI role is as the object store under other platforms. S3 Vectors in the documentation is the only AI-specific item, and its release status is still open.
Capability by area
Buying, lock-in and release record
Technical lock-in(lower is better)
- Formats2.5
- Objects are striped into RADOS objects on BlueStore and cannot be read as plain files without Ceph
- Export path1
- S3 and Swift reads, multisite sync to another Ceph cluster, cloud sync module, rclone
- Stack coupling3
- Needs a whole Ceph cluster with monitors and OSDs
- Hardware / cloud coupling0
- Any x86 or Arm server, fully offline
- Skills and tooling coupling2.5
- Ceph administration is a specialised and scarce skill; the tooling is open
Release credibility
- Cadence3.5
- One named release a year with dated point releases and published end-of-life dates; the named release has landed between August and November (Reef 2023-08-07, Squid 2024-09-26, Tentacle 2025-11-18)
- Roadmap transparency4
- Open tracker, public release notes and documentation; no dated roadmap and no date for the next series
- Say-do4
- Few promises; deprecations are announced a release ahead with a removal floor (STS Lite no sooner than V)
- Velocity3.5
- Steady RGW additions: IAM accounts in Squid, GetObjectAttributes and lock on existing buckets in Tentacle
- Lifecycle stability3.5
- About two years per series with two series supported; tenant IAM and STS Lite are being removed and Pacific cannot jump straight to Reef
Partners and services
- Partner programme openness4
- Anyone may package, support and resell it; Ceph Foundation membership is open in tiers; no vendor programme with margins
- Multi-tenancy and self-service4
- Tenants, User Accounts with IAM, user and bucket quotas, usage logs; no portal
- API and infrastructure-as-code3.5
- Admin Ops API, Rook CRDs and cephadm; Terraform and Ansible content is community-maintained
- Skills and certification2
- No vendor-neutral certification found; training comes from the packaging vendors
Alternatives to Ceph RGW
Questions about Ceph RGW
Is Ceph RGW any good?
Ceph RGW ranks #1 of 21 S3-compatible object storage products in the Object Storage Ledger 2026, with a Ledger Index of 66.3 out of 100. Its strongest areas are durability and resilience, s3 api fidelity, ecosystem and openness.
What are the best alternatives to Ceph RGW?
The closest by Ledger Index are MinIO AIStor (64.1), IBM Storage Ceph (62.9), SeaweedFS (61.6), StorageGRID (61.3).
How much lock-in does Ceph RGW bring?
Ceph RGW scores 9 out of 25 on technical lock-in (lower is better). Export path: S3 and Swift reads, multisite sync to another Ceph cluster, cloud sync module, rclone.
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