rclone/docs/content/tiers.md

title, description

title	description
Backend Support Tiers	A complete list of supported backends and their stability tiers.

Tiers

Rclone backends are divided into tiers to give users an idea of the stability of each backend.

Tier	Label	Intended meaning
{{< tier tier="Tier 1" >}}	Core	Production-grade, first-class
{{< tier tier="Tier 2" >}}	Stable	Well-supported, minor gaps
{{< tier tier="Tier 3" >}}	Supported	Works for many uses; known caveats
{{< tier tier="Tier 4" >}}	Experimental	Use with care; expect gaps/changes
{{< tier tier="Tier 5" >}}	Deprecated	No longer maintained or supported

Overview

Here is a summary of all backends:

{{< tiers-table >}}

Scoring

Here is how the backends are scored.

Features

These are useful optional features a backend should have in rough order of importance. Each one of these scores a point for the Features column.

• F1: Hash(es)
• F2: Modtime
• F3: Stream upload
• F4: Copy/Move
• F5: DirMove
• F6: Metadata
• F7: MultipartUpload

Tier

The tier is decided after determining these attributes. Some discretion is allowed in tiering as some of these attributes are more important than others.

Attr	T1: Core	T2: Stable	T3: Supported	T4: Experimental	T5: Incubator
Maintainers	>=2	>=1	>=1	>=0	>=0
API source	Official	Official	Either	Either	Either
Features (F1-F7)	>=5/7	>=4/7	>=3/7	>=2/7	N/A
Integration tests	All Green	All green	Nearly all green	Some Flaky	N/A
Error handling	Pacer	Pacer	Retries	Retries	N/A
Data integrity	Hashes, alt, modtime	Hashes or alt	Hash OR modtime	Best-effort	N/A
Perf baseline	Bench within 2x S3	Bench doc	Anecdotal OK	Optional	N/A
Adoption	widely used	often used	some use	N/A	N/A
Docs completeness	Full	Full	Basic	Minimal	Minimal
Security	Principle-of-least-privilege	Reasonable scopes	Basic auth	Works	Works