deltaglider.com

What It Is

DeltaGlider is an open-source S3-compatible storage proxy from Beshu Tech, designed to add enterprise-grade capabilities in front of object storage services such as Hetzner, Wasabi, MinIO, and AWS. It preserves the same S3 API and SigV4 access method, so in theory applications can adopt it without code changes. The product is licensed under GPL-3.0, and the software itself can be self-hosted for free.

Core Features and Architecture

Its key selling point is transparent delta compression: for versioned binary objects, it stores differences rather than full copies, reconstructs the original bytes on read, and verifies them with SHA-256. The documentation claims up to 10×–100× compression, but real-world savings depend on file type and how similar the versions are. Beyond that, it also provides per-user IAM, ABAC, OAuth/OIDC SSO, group mapping, lifecycle rules, cross-cloud/cross-bucket replication, pause and resume, AES-256-GCM encryption at rest, and multi-backend routing. The Admin UI covers file browsing, users, bucket policies, soft quotas, replication, backend configuration, Prometheus dashboards, and analytics.

Pricing and Trial

Pricing is fairly transparent: the open-source edition is free, includes the full product, and has no capacity limits; paid plans mainly cover production support. The 30-day Production support trial is free, requires no credit card, and does not auto-charge. It includes engineering Slack access, a 4-hour business-hours response SLA, and one architecture review. Formal support is tiered by compressed stored footprint: Starter at $2.5k/year, Growth at $7.5k/year, Scale at $15k/year, and 250TB+ requires contacting sales. If you want to embed it in a proprietary product or avoid GPL-3.0 obligations, a commercial license is required.

Pros and Cons

The advantages are S3 compatibility and low migration friction. Open-source self-hosting reduces lock-in risk, while permissions, replication, compression, and encryption are consolidated into a single control layer. For highly repetitive binary workloads such as build artifacts, versioned packages, and artifact repositories, the cost benefits could be significant. The downsides are that the product is relatively new, and the production credibility cited in the main materials mainly comes from the same team’s ReadonlyREST rather than DeltaGlider itself. The free edition has no production SLA, and the trial is not a managed service; it does not include root-level managed operations or 24/7 on-call support.

Who It’s For and Access from China

DeltaGlider is better suited to DevOps, SRE, platform engineering, and storage teams with infrastructure operations capabilities, especially enterprises that need multi-cloud object storage governance, cross-cloud migration, low-cost backend abstraction, or lower artifact storage costs. Access from mainland China is not discussed in the main materials. GitHub access, image pulls, Slack support, and connectivity to overseas object storage may affect the experience and should be tested directly; payment methods are also not disclosed. Alternatives worth evaluating include MinIO, Ceph RGW, SeaweedFS, cloud provider object storage replication/lifecycle solutions, Cloudflare R2, Backblaze B2, Wasabi, and others.