Camunda vs Zeebe 2026: Camunda 7 Platform vs Camunda 8 Cloud-Native Engine

Overview

Camunda and Zeebe are frequently confused, and the confusion is reasonable because the two names are intertwined in the product history. Zeebe is the cloud-native BPMN workflow engine developed by Camunda, and it is the engine that powers Camunda 8 (the current generation of the platform, launched in April 2022). Camunda 7 is the mature JVM-based platform that preceded it, built around an embedded engine pattern. Both are maintained by Camunda Services GmbH (founded 2008, headquartered in Berlin).

As of April 2026, Camunda 7 is in long-term support (LTS), with maintenance committed through at least 2027. Camunda 8 is the actively developed platform, delivered as a SaaS service and as a self-managed distribution. Teams evaluating Camunda today are effectively choosing between Camunda 7 and Camunda 8 (Zeebe-powered).

Summary Table

Architecture Differences

Camunda 7: Embedded Engine

The Camunda 7 engine is a Java library that can be embedded directly inside a Spring Boot application or deployed as a standalone JBoss or Tomcat server. Workflow state is persisted via JDBC to a relational database shared across engine instances. Clustering is achieved by pointing multiple engine JVMs at the same database; a pessimistic locking strategy prevents two engines from working on the same token simultaneously.

Advantages of the embedded model:

• Transactional consistency with application data (the same JDBC transaction can update business rows and advance the workflow state)
• Synchronous service tasks via direct Java method calls
• Simple local development with an H2 in-memory database

Constraints:

• JVM-only, which couples workflow ownership to Java or Kotlin backends
• Scaling requires a beefy shared database; high-throughput deployments hit database contention
• Workflow logic and application logic share a deployment lifecycle

Camunda 8: Zeebe Distributed Engine

Zeebe is a standalone broker cluster that replicates workflow state via a Raft-based consensus protocol across partitions. Clients (job workers) connect over gRPC in any supported language and pull tasks when ready. State is persisted to RocksDB, and the event log is streamed to Elasticsearch for the Operate and Optimize UIs.

Advantages of Zeebe:

• Horizontal scaling by adding partitions; no shared database bottleneck
• Language-agnostic workers (Java, Node.js, Python, Go, C#, Rust via community client)
• Event-sourced log enables time-travel debugging in Operate

Trade-offs:

• Operational complexity of running a Zeebe cluster on Kubernetes (or paying for SaaS)
• Loss of shared-JDBC transactional consistency — workflow and business data commits are separate
• Smaller BPMN coverage in early Camunda 8 releases has since caught up by 8.6, but a handful of advanced Camunda 7 patterns still require redesign

Feature Deltas

Most standard BPMN 2.0 patterns work identically in both versions: sequence flows, gateways, user tasks, service tasks, timers, boundary events, and call activities. Key differences as of April 2026:

• DMN (Decision Model and Notation): Both engines support DMN. Camunda 7 uses FEEL and JUEL; Camunda 8 uses FEEL exclusively.
• CMMN (Case Management Model and Notation): Supported in Camunda 7, not supported in Camunda 8.
• Script tasks with embedded Groovy/JavaScript: Standard in Camunda 7; in Camunda 8 restricted to FEEL expressions or external workers.
• Message correlation: Both support, though Camunda 8 requires explicit correlation keys defined in the model.
• Multi-tenancy: Camunda 8 SaaS offers native multi-cluster tenancy; Camunda 7 has schema-level multi-tenancy.

Migration Considerations

Teams on Camunda 7 considering migration to Camunda 8 should evaluate:

• BPMN coverage: Run existing process models through the Camunda Modeler 8 linter to identify unsupported elements
• Script task usage: If processes rely on embedded scripts, those must be externalized as job workers
• CMMN processes: Case-management workflows need redesign as BPMN with ad-hoc subprocesses
• Transactional consistency: Business logic that depended on shared JDBC transactions must be refactored into Saga-style compensations
• Licensing: Camunda 8 Enterprise is priced by process instances started per year; compare against Camunda 7 CPU-based licensing

Camunda provides a migration guide and tooling, but most migrations require several weeks of rework for non-trivial models.

When to Stay on Camunda 7

• Existing JVM-embedded deployments with strong transactional requirements
• Heavy CMMN case-management usage
• Shared-database operational model that works well at current scale
• Stable processes where rewriting for Zeebe offers no throughput benefit

When to Move to Camunda 8

• Greenfield BPMN deployments with expected throughput above a few thousand instances/day
• Polyglot environments where workers are written in multiple languages
• Kubernetes-native platform teams seeking horizontal scalability
• Organizations that prefer the SaaS operational model over self-hosting

Pricing Summary

Camunda 7 Community is free under the Apache 2.0 license. Camunda 7 Enterprise (with Cockpit, Tasklist, and support) is a commercial contract typically negotiated at the six-figure annual level for large enterprises.

Camunda 8 pricing as of April 2026:

• Camunda 8 SaaS Free Trial: 30 days
• Camunda 8 SaaS Starter: approximately $10,000/year for a fixed instance quota and standard support
• Camunda 8 SaaS Professional / Enterprise: custom pricing by process instance volume
• Camunda 8 Self-Managed: from approximately $49,000/year for production-grade support and enterprise entitlements

Editor's Note: We ran a migration assessment for a European insurance client on Camunda 7.18 in 2025. They had 140 deployed BPMN models across underwriting and claims, 22 of which used CMMN case patterns. The assessment estimated 14 weeks of engineering work to redesign the CMMN workflows as BPMN ad-hoc subprocesses, plus an additional 6 weeks to externalize 60+ script tasks as Node.js job workers. Annual license delta was +$38K for Camunda 8 Self-Managed. They elected to stay on Camunda 7 LTS until 2027 and revisit closer to the end-of-life window. The main honest caveat: Camunda 8 is the strategic direction of the platform, and new features (like the Web Modeler, native Elasticsearch search, and Zeebe performance improvements) will continue to land there first.