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Metaflow vs ZenML

A side-by-side comparison of Metaflow and ZenML across 26 workflow orchestration capabilities. Metaflow fully supports 12 of them and ZenML fully supports 13; of the 12 mandatory features, Metaflow covers 9 and ZenML covers 9.

Metaflow

Metaflow is an open-source Python framework, originally developed at Netflix, for building and operating ML and data science workflows from prototype to production.

Features fully supported12 / 26
Mandatory features: 9 / 12View profile

ZenML

ZenML is an open-source MLOps framework that lets teams write ML and AI pipelines in Python once and run them on any orchestrator and infrastructure stack.

Features fully supported13 / 26
Mandatory features: 9 / 12View profile

Feature comparison

4 of 26 capabilities differ between Metaflow and ZenML.

Change tools
CapabilityMetaflowZenML
DAG-based workflow definition
Define dependencies and execution order
Mandatory		YesYes
Code-first workflows
Versionable, testable workflows
Mandatory		YesYes
Declarative workflow model
Predictability, reproducibility
Mandatory		PartialPartial
Task dependency resolution
Correct execution order
Mandatory		YesYes
Persistent workflow state
Crash recovery, observability
Mandatory		YesYes
Task retries
Handle transient failures
Mandatory		YesYes
Retry policies (backoff, limits)
Avoid cascading failures
Recommended		PartialYes
Scheduling (cron / time-based)
Automated recurring workflows
Depends		PartialPartial
Event-driven execution
React to external systems
Depends		PartialPartial
Backfills / replays
Reprocess historical data
Depends		PartialNo
Idempotency support
Safe retries & replays
Mandatory		PartialPartial
Exactly-once semantics
Correctness for business workflows
Optional		NoNo
Long-running workflows (days/months)
Business processes, approvals
Depends		PartialPartial
Human-in-the-loop steps
Approvals, manual actions
Optional		NoPartial
Dynamic workflows at runtime
Conditional execution
Depends		PartialPartial
Workflow versioning
Safe evolution over time
Recommended		YesYes
Distributed execution
Scalability
Mandatory		YesYes
High availability scheduler
Production reliability
Recommended		PartialPartial
Fault-tolerant execution
Crash safety
Mandatory		PartialPartial
Observability (logs, states, UI)
Debugging & ops
Mandatory		YesYes
Workflow-level visibility
Understand end-to-end runs
Mandatory		YesYes
Task isolation
Failure containment
Mandatory		YesYes
Native Kubernetes support
Modern infra compatibility
Depends		YesYes
Multi-language SDKs
Polyglot systems
Optional		PartialNo
Deterministic replay
Safe recovery & correctness
Optional		NoNo
Pluggable execution backends
Flexibility
Recommended		YesYes

* To be considered a complete workflow orchestration tool, a tool must implement the features marked as mandatory according to our assessment.

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Learn more

Read the full profiles, including pros and cons, installation and alternatives.

MetaflowZenML

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