SeaweedFS vs Cloudflare R2
Both are alternatives to Amazon S3. Here's how they stack up — verified facts, no spin.
Also searched as Cloudflare R2 vs SeaweedFS — same comparison, one verdict.
SeaweedFS
Built for billions of small files, where most object stores struggle.
SeaweedFS is a distributed file and object store designed around a specific weakness in the others: enormous numbers of small files. Its architecture keeps metadata lookups fast where conventional object stores slow down, which makes it a strong fit for image, thumbnail and document workloads at scale. Apache-2.0, around 34k stars, with an S3-compatible gateway and tiered storage to cloud back-ends. It is less known than MinIO and that is the main caution — fewer worked examples when something goes wrong.
Cloudflare R2
S3-compatible with zero egress fees — the direct answer to the complaint.
R2 is Cloudflare's object store and its defining feature is a deliberate attack on S3's pricing: storage around $0.015 per GB per month and no egress charges whatsoever. For anything read frequently over the internet — media, assets, public datasets — that single difference can turn a four-figure monthly bill into a two-figure one. It is S3-API compatible, so migration is largely a config change. It is proprietary and hosted, which is the honest trade, and it makes Cloudflare rather than Amazon the party you depend on.
Side by side
| SeaweedFS | Cloudflare R2 | |
|---|---|---|
| Sovereignty Score | 93 | 40 |
| Open source | Yes | No |
| Self-hostable | Yes | No |
| Local-first | Yes | No |
| License | Apache-2.0 | Proprietary (hosted service) |
| Pricing | Free and open source. You supply the hardware. | About $0.015/GB/month storage. No egress charges. Free tier included. Checked 2026-08-04. |
SeaweedFS edges it on the Sovereignty Score, but the right pick depends on the trade-offs below.
SeaweedFS
Strengths
- +Handles billions of small files where other object stores degrade
- +Apache-2.0 — more permissive than MinIO's AGPL
- +S3-compatible gateway plus a real filesystem interface
- +Tiered storage to cloud back-ends for cold data
Trade-offs
- −Smaller community and fewer worked examples than MinIO
- −More moving parts — master, volume and filer servers
- −Documentation is thinner
- −Less battle-tested at enterprise scale
Cloudflare R2
Strengths
- +Zero egress fees — the single biggest cost difference in this category
- +S3-compatible API, so migration is mostly configuration
- +Cheaper storage than S3 as well
- +Integrates with Cloudflare Workers and the CDN
Trade-offs
- −Proprietary and hosted — you have swapped one vendor for another
- −Fewer surrounding services than S3's ecosystem
- −No deep-archive tier comparable to Glacier
- −Ties you into Cloudflare's platform decisions
Related alternative guides
Facts verified 2026-08-04. Licenses and pricing change — spotted something out of date? That's a correction we want.