Ceph vs Amazon S3
A detailed comparison to help you choose between Ceph and Amazon S3.
Quick Verdict
4.1/5
Ceph
0 reviews
4.1/5
Amazon S3
0 reviews
Both Ceph and Amazon S3 are equally rated at 4.1/5. Open-source distributed storage system providing object, block, and file storage through a single cluster. Designed for organizations building cloud infrastructure or managing petabyte-scale data. AWS S3 stores and retrieves unlimited amounts of data via a simple web interface. Built for developers, enterprises, and anyone needing reliable, durable cloud storage with pay-as-you-go pricing.
Ceph Unified, scalable storage platform for objects, blocks, and files |  Amazon S3 Scalable object storage for any data size or type | |
|---|---|---|
| Overview | ||
| Rating | 4.1 (0 reviews) | 4.1 (0 reviews) |
| Pricing model | free | pay-as-you-go (per GB-month + per 1,000 requests + retrieval/transfer) |
| Starting price | Free✓ | From $0.023/mo |
| Best for | Enterprises and service providers building self-managed, large-scale storage with object, block, and file requirements on commodity hardware | Teams building on AWS who need durable, API-stable object storage for backups, data lakes, static content and archives — and who value tooling compatibility over the lowest per-GB rate |
| Features | ||
| IPv6 | ✓ | |
| DDoS protection | ✓ | |
| Automated backups | ||
| Snapshots | ✓ | |
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ||
| Free tier | ||
| Data-center locations | ||
| Regions | — | 39 AWS regions / 123-124 AZs |
| Tags | ||
| Tags | free tieropen sourceself hostables3 compatible | free tiers3 compatibleapi accessus datacentereu datacenterapac datacenterterraform provider |
| Visit Ceph → | Visit Amazon S3 → | |
Ceph
Pros
- + Unified object, block, and file storage from one self-healing cluster with no single point of failure
- + Free and open source (LGPL 2.1/3.0) under Linux Foundation governance
- + Proven at very large scale — CERN, OVH, DigitalOcean run production deployments
- + S3-compatible object API (RGW), erasure coding, replication, snapshots and clones built in
- + Strong Kubernetes story (Rook, Ceph CSI) and modern ops tooling (cephadm, dashboard, Prometheus)
Cons
- - Steep learning curve; incident response and tuning require real storage expertise
- - Practical minimum is a multi-node cluster (3+ monitors, ~4 GiB RAM per OSD, 10 Gb/s networking)
- - Total cost of ownership dominated by hardware and operations, not licenses
- - Vendor ecosystem in flux (SUSE exited Ceph-based products from 2021)
Amazon S3
Pros
- + Designed for 11 nines durability with cross-AZ replication by default and strong read-after-write consistency
- + The S3 API is the industry standard — code written in 2006 still works, and third-party compatibility is everywhere
- + 23x cost ladder from Standard down to Glacier Deep Archive at $0.00099/GB-month, with lifecycle automation
- + Deepest storage feature set available: versioning, Object Lock, replication, inventory, event notifications, access management
Cons
- - Egress at $0.09/GB and per-request pricing produce surprise bills for chatty or restore-heavy workloads
- - IA and Glacier classes add retrieval fees and latency — the restore path must be priced separately
- - Policy configuration (bucket policies, IAM, Block Public Access, KMS keys) is complex and historically error-prone
- - SLA (99.9%/99.0%) is far below the durability figure — availability and durability are different promises
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