Which open-source alternatives to Camunda 8 fit your situation?
If your renewal, a data residency requirement or the Camunda 8.6 license change has pushed you to look elsewhere, the short answer is that Flowable, Operaton and CIB seven are all Apache-2.0 BPMN engines that can run in your own infrastructure, but none is a drop-in replacement for Camunda 8's Zeebe architecture. Zeebe is a distributed, event-sourced orchestration engine, while the three alternatives are Java process engines that run embedded in an application or as a service with a database behind them. Expect a change in architecture, operations and tooling, not only a change of vendor.
The licensing facts drive the timing. From Camunda 8.6, the source code of Zeebe, Operate, Tasklist, Identity and Optimize is under the Camunda License v1, and compiled software is under proprietary licenses. Production use of Camunda 8 Self-Managed requires the Self-Managed Enterprise Edition. Without a commercial license, Camunda 8 Self-Managed may only be used for non-production purposes under the Camunda Self-Managed Non-Production license. Read the current terms in the Camunda 8 Self-Managed licenses documentation and confirm with Camunda which of your components and deployment modes each clause covers.
Teams still on Camunda 7 face a different decision. Camunda 7 Community Edition is Apache-2.0 licensed, but it has reached end of life, and its repository was archived on November 4, 2025, so it will receive no further releases or security patches. Camunda 7 Enterprise Edition end of life has been extended to April 9, 2030, with fee-based extended support through April 2032. If you run Camunda 7, confirm whether you are on Community or Enterprise, since that determines whether you need a patch path now or a migration plan on a longer horizon.
How Flowable, Operaton and CIB seven compare as BPMN engines
Each option below is an Apache-2.0 Java engine that runs in your own infrastructure, so the choice depends less on license cost and more on lineage, API surface and how much of the engine your team wants to own. The compatibility claims here refer to the Camunda 7 lineage, so any Camunda 8 model or API you carry over must be checked against each engine's own documentation before you commit.
Flowable as a BPMN, CMMN and DMN engine
Flowable is an Apache-2.0 Java process engine that supports BPMN, CMMN and DMN in one runtime. It can be embedded in an application or deployed as a standalone service with REST APIs, which suits teams that need case management or decision tables next to their process models. The trade-off is that its APIs and data model are not Camunda's, so Camunda 8 job workers and models need rework rather than a drop-in swap. Flowable also sells commercial editions, so confirm which features your production setup depends on are in the open-source distribution.
Operaton as a Camunda 7 successor
Operaton is an Apache-2.0 BPMN 2.0 engine born from the Camunda 7 codebase. Its repository states a fully compatible REST API, database schema and deployable BPMN and DMN models, and it offers an OpenRewrite recipe for migrating from Camunda 7. This fits teams whose current estate is Camunda 7 and who want to keep the same engine family while leaving the Camunda 8 platform. The trade-off is that Operaton does not run Camunda 8 Zeebe workflows, so teams moving from Camunda 8 must plan a re-platforming of models and workers, and should verify the compatibility statement against their own processes.
CIB seven as a JVM-native framework
CIB seven is an Apache-2.0 workflow and process automation framework whose core is a native BPMN 2.0 engine running inside the Java Virtual Machine. Its JVM-native design suits Java shops that want the engine as a library inside their own services and deployment pipeline. The trade-off is a smaller footprint of outside migration tooling compared with the Camunda 7 lineage, so validate its compatibility with Camunda 7 and 8 models, REST interfaces and history data with a proof of concept before you commit to a migration plan.
Which open-source option covers each Camunda 8 capability?
This table maps each main Camunda 8 capability to Flowable, Operaton and CIB seven, with the gap or workaround for each. BPMN and DMN execution is well covered across the options, while Zeebe-specific behavior, monitoring, analytics and identity need confirmation in a proof of concept before you commit.
| Camunda 8 capability | Flowable, Operaton and CIB seven | Gap or workaround to confirm |
|---|---|---|
| BPMN process execution | All three run BPMN 2.0 process models on a Java engine under Apache-2.0. Operaton and CIB seven derive from the Camunda 7 codebase. | Zeebe's distributed execution model differs from these engines. Confirm how each engine handles your process volumes and deployment topology. |
| Job workers and external task clients | Flowable offers service tasks and REST APIs. Operaton and CIB seven support external task patterns inherited from Camunda 7. | Camunda 8 job workers are gRPC-based. Plan to rewrite worker code against each engine's client or REST API. |
| Operate monitoring | Flowable and Operaton expose process and task query APIs. Dedicated operations consoles vary by project and may need to be built or adapted. | No direct Operate equivalent is confirmed for all three. Verify dashboards, incident views and instance retry flows with each project. |
| Tasklist user tasks | All three provide task management APIs. A user interface for end users is generally not included in the engine. | You build or adopt the task UI yourself. Confirm which bundled web applications each project ships. |
| Identity access management | Engines rely on your existing identity provider or application security. Flowable and Operaton document their own user and group handling. | Camunda Identity has no one-to-one equivalent. Map roles and authorizations to your IdP, such as LDAP, OIDC or SAML, and confirm per project. |
| Optimize analytics | Historic data and query APIs support reporting. Dedicated analytics dashboards are not a core feature of the engines. | Optimize has no direct equivalent. Plan a reporting layer on the history tables or an external BI tool and confirm the approach. |
| DMN decisions | Flowable and Operaton execute DMN decision tables. CIB seven includes DMN support inherited from the Camunda 7 base. | Feature parity with Camunda's DMN engine varies by hit policy and FEEL details. Test your decision tables directly. |
| Clustering and high availability | Flowable and Operaton run clustered on shared relational databases. CIB seven supports clustered deployment on the JVM. | Failover, scaling and session behavior depend on your database and application server setup. Validate under load in your environment. |
| Zeebe event-streaming model | No equivalent log-based event streaming is built into the three engines. Events are typically exported through history, listeners or a message broker. | This is the largest architectural change. Redesign event consumers, exporters and message correlation before migration. |
What moves over from Camunda 7 and what has to be rebuilt from Camunda 8
The two starting points need different plans, so separate them before you estimate anything. A team on Camunda 7 has the most tooling available, but the Camunda-supplied path leads to Camunda 8. Camunda's Data Migrator copies running Camunda 7 process instances into Camunda 8 with their state preserved, a Diagram Converter handles BPMN models, and code conversion utilities handle custom code. Runtime migration is documented as production ready from Camunda 8.8, while history migration is experimental, so plan for historical data to be handled separately. If your destination is Operaton or another open-source engine rather than Camunda 8, the relevant tool is different. Operaton states that it offers an OpenRewrite recipe for migrating from Camunda 7 and a fully compatible REST API and database schema. Confirm with the Operaton project which Camunda 7 version your application depends on and whether the compatibility covers your custom listeners, scripts and extensions.
A team on Camunda 8 should expect less to transfer automatically. BPMN diagrams usually survive as files, because the models are standard BPMN 2.0 XML, but that is where the portability ends. Job worker code written against the Zeebe client, Zeebe-specific connectors and any Camunda 8 element templates need to be rewritten for the target engine. Operations also change: the monitoring and incident views you currently use in Operate will have to be rebuilt with the open-source engine's own tooling or a dashboard you build yourself. No supplied tool converts Camunda 8 runtime state into Flowable, Operaton or CIB seven, so in-flight instances must either finish on Camunda 8 or be restarted, with a cutover plan agreed for each long-running process. Ask each candidate vendor which BPMN elements and extension properties it supports and test a representative model before committing.
What does running an open-source BPMN engine cost over several years?
This table sets the Camunda 8 Enterprise subscription against the cost components of running Flowable, Operaton or CIB seven yourself. Read each row for who is paid, whether the cost is one-time or recurring, and what pushes it up. No prices are shown, so use the table to build the questions you put to vendors and partners.
| Cost component | Camunda 8 Enterprise | Open-source engine (Flowable, Operaton, CIB seven) |
|---|---|---|
| Software license | Recurring subscription. Set by the Camunda quote, required for production self-managed use from 8.6. | No license fee for Apache-2.0 editions. Flowable commercial editions are optional and priced separately. |
| Infrastructure | Recurring. Kubernetes clusters, storage and networking for the Camunda components you deploy. | Recurring. Java application servers, database and messaging hosts sized to process volume and HA targets. |
| Initial implementation and remodeling | One-time. Modeling in Camunda 8 terms, connectors and worker code. | One-time. Engine setup, model work and any remodeling to the chosen engine's conventions. |
| Migration from Camunda 7 or 8 | One-time. Effort depends on the Data Migrator, Diagram Converter and custom code volume. | One-time. Operaton offers an OpenRewrite recipe for Camunda 7 code. Migration is still a separate project. |
| Upgrades and patching | Recurring. Covered in part by the subscription, plus your internal testing and rollout effort. | Recurring and fully internal or partner-delivered. Camunda 7 CE gets no further releases or security patches, so unpatched use is an ongoing cost. |
| Support contracts | Recurring. Included in the Enterprise subscription terms. Confirm scope in your quote. | Optional recurring retainer for a partner or vendor. Without one, your team carries incident response. |
| Internal skills | Recurring. Staff trained on Camunda 8 tooling and operations. | Recurring. Staff comfortable with Java, the chosen engine's APIs and database operations. |
| Main cost drivers | Enterprise terms, number of components deployed, and HA requirements. | Process count, connected systems, custom code volume, HA requirements and staff familiarity with Java. |
What you give up when you leave Camunda 8, and the usual workarounds
Moving from Camunda 8 to a self-hosted Apache-2.0 engine changes who runs the platform, who supports it, and which tools come with it. Each gap below is a decision you own after the move, with a workaround that is common in practice and a check to run before you commit to it.
Vendor-managed scaling and support
Camunda 8 Self-Managed production use requires the Enterprise Edition subscription, which is the vendor-backed path for running Zeebe at scale. With Flowable, Operaton or CIB seven, you carry the cluster sizing, database tuning, upgrades and incident response yourself or through a partner. Confirm which engine versions your team can patch within your own change windows, and who answers when a production job queue stalls.
No bundled Operate or Optimize
Camunda 8 ships Operate for instance inspection and Optimize for analytics, and the 8.6 change moved their source under the Camunda License v1. The open-source engines do not supply equivalents with the same scope. Common workarounds are the engine's own admin tooling, custom dashboards built on the history tables, or a monitoring stack such as Prometheus and Grafana. Confirm which incident views, retry actions and audit queries your operations team relies on today.
No bundled Identity
Camunda 8 provides Identity for authentication and authorization in Self-Managed deployments. Operaton and Flowable expect you to connect an external identity layer. The usual choice is Keycloak or an identity provider your organization already runs, with group and role mapping to process definitions and tasks. Confirm how roles map to task assignment, how tokens reach the REST API, and how access reviews will be evidenced.
Job worker model changes
Camunda 8 uses external job workers that poll Zeebe over gRPC or REST and acknowledge jobs with completion or failure calls. Camunda 7 and the Camunda 7 forks use Java delegates, external tasks or REST-driven task handling inside or beside the engine. Any worker code you wrote for Camunda 8 will need a new execution model. Confirm retry semantics, timeout handling and idempotency for every service task before you port it.
No Camunda connector catalog
Camunda 8 offers a catalog of prebuilt connectors for common SaaS and protocol endpoints. The open-source engines do not carry that catalog, so each integration becomes code you own. Typical workarounds are Java delegates for in-process logic or thin REST client services that the engine calls. Inventory every connector in use, then decide which ones to rebuild, which to replace with a message broker step, and which to drop.
Support contract and commercial options
Open-source licensing removes the license fee, but it does not remove the need for a support path. Options include a retainer with an implementation partner for patching, upgrades and runbooks, or a commercial edition of the chosen engine. Flowable sells commercial editions alongside its Apache-2.0 core. Ask each vendor or partner for the written response times, the supported versions and the upgrade commitments before the migration plan is signed.
How a migration off Camunda 8 runs, from inventory to decommission
This sequence moves running and future process work from Camunda 8 to a self-hosted engine in controlled stages, so each step produces evidence that the next one depends on. Timing follows from what the inventory finds, not from a fixed schedule.
Inventory processes, workers and integrations
Engineering and process owners list every deployed BPMN model, DMN decision table and form, with its Camunda 8 version and the job workers, connectors and external systems each one calls. Include Operate and Optimize usage, which dashboards and reports people rely on, and any alerts or reports that read from Camunda data. The step is done when every process has an owner, a dependency list and a classification by business criticality, and the team can say which processes have in-flight instances today.
Decide data export and retention for completed instances
Work with records, compliance and audit owners to decide which completed instance data must be exported, in what format, and for how long it must be kept. Decide whether history stays in a read-only archive, moves to the new engine's history tables, or is dropped after export, and document the basis for each choice. Engineering then builds and tests the export job. The step is done when the retention decision is signed off and a sample export can be restored and queried by the people who need it.
Map Camunda 8 constructs to the target engine
Architects compare each BPMN element, timer, message correlation, error handling pattern and DMN usage in the inventory against the target engine's supported constructs. Flowable, Operaton and CIB seven differ in details such as job handling, variable scoping and REST API shape, so confirm each one against the candidate's own documentation rather than assuming parity. The team also maps Zeebe job workers to the target's external task or delegate model. The step is done when a written mapping table covers every construct in use, and each gap has a rebuild, redesign or accept decision.
Pilot on one or two low-risk processes
Pick one or two processes with low volume, few external calls and a clear business owner, then rebuild them on the target engine in a non-production environment. Run them with realistic test data, check error paths, retries and timers, and compare results with the Camunda 8 version. The owner of the process signs off on behavior, and the operations team checks monitoring, logging and backup for the new engine. The step is done when the pilot runs end to end with documented differences and no open defects that block production.
Run in parallel with routing for in-flight work
Deploy the new engine in production alongside Camunda 8 and route new process starts to it, one process family at a time. Instances already running on Camunda 8 finish there, so no in-flight state is moved by hand. Monitor both platforms for throughput, failed jobs and business outcomes, and keep a documented rollback path to Camunda 8 for new starts. The step is done when no new starts go to Camunda 8 for the migrated families and in-flight counts on the old platform fall to an agreed level.
Cut over process families and verify
Move each remaining process family to the new engine according to the order set in the inventory, starting with dependencies of earlier families and leaving the most critical last. For each cutover, confirm the Camunda 8 instances are drained or have a documented plan for them, that integrations point to the new endpoints, and that reports and dashboards read from the new source. The step is done when every family is live on the new engine and the business owners confirm that outcomes match the pre-migration baseline.
Decommission Zeebe and related components
Once no in-flight instances remain and the retention period for exported data is met, stop Zeebe, Operate, Tasklist, Identity and Optimize in the order that keeps any remaining reads working. Remove the associated infrastructure, secrets, Elasticsearch or other storage that only those components used, and revoke access. Keep the final export, the mapping table and the cutover records for audit. Confirm license obligations with Camunda before ending any subscription. The step is done when the platform is shut down, storage is removed or archived as decided, and the decommission record is filed.
Which option fits your situation: data residency, cost, customization or regulation?
If the main driver is keeping process data inside your own cloud account, data center or air-gapped network, all three engines are candidates because each runs as software you deploy yourself. The residency question is less about the engine and more about where the database, the runtime and the backups sit. Camunda 8 Self-Managed in production now requires an Enterprise subscription, so the choice here is mostly about which open-source engine your team can host and support in that location.
- Deployment target: Confirm whether you need a single JVM service, a containerized deployment or an embedded library inside an existing application.
- Database placement: Each engine persists process state in a relational database, so the database vendor and its region must meet your residency rules.
- Backup location: Process instances, history and audit records end up in backups that often sit outside the primary region.
- Support boundary: Open-source engines have no vendor support contract unless you buy one, so confirm who answers production incidents.
- Egress: Confirm that the engine and its connectors make no outbound calls you cannot allow.
Before you compare engines, confirm with your compliance team where process data is allowed to be stored, processed and backed up.",
Apache-2.0 licensing removes the license line for Flowable, Operaton and CIB seven, but it does not remove cost. The license fee is replaced by engineering time for installation, upgrades, monitoring, backups, security patching and on-call support. Your cost depends on how many environments you run, how often you upgrade and how much of that work your own staff already do. Camunda 8 Self-Managed in production requires a paid Enterprise subscription, so the comparison is between a subscription and staff time.
- Recurring labor: Patching, upgrades and incident response recur every release cycle and grow with the number of environments.
- One-time work: Migration of models, custom code and integrations is a project cost that ends once the move is complete.
- Infrastructure: Compute, database and storage costs recur and depend on process volume and high availability requirements.
- Commercial support: Flowable sells commercial editions, and third-party support can be bought for other engines. Ask each vendor what it covers.
- Quote request: Ask for a written breakdown of labor, infrastructure and support, with assumptions stated for each.
When comparing with your current subscription, use the same time horizon and include staff time, not only infrastructure.
The architecture question is whether your process logic should run inside an application you already build or as a shared service that other systems call over an API. Flowable can run embedded in a Java application or as a standalone service with REST APIs. Operaton is built from the Camunda 7 codebase and keeps a REST API and database schema compatible with that line. CIB seven runs its BPMN 2.0 engine inside the Java Virtual Machine. Your choice shapes how you release, scale and secure the engine.
- Embedded engine: Process deployments follow your application release cycle, and the engine shares its JVM, transactions and security context.
- Standalone service: Teams call the engine through REST APIs, which suits multiple applications using one process platform.
- Custom Java code: Listeners, delegates and custom connectors need to be rebuilt or verified against the chosen engine.
- Camunda 7 heritage: Operaton's compatibility with Camunda 7 APIs and schema can reduce rework if you already run Camunda 7 code.
- Scaling model: Confirm how each option handles clustering and horizontal scaling for your expected load.
Before you choose, confirm whether your process logic needs to be embedded in an existing Java application or exposed as a shared service.
In regulated environments, the engine is one component inside a control environment, and your organization owns the evidence. Configuration records, access control settings, patch history and change approvals must be produced by your team, and they must show that the platform behaves as documented. DeployOpen prepares systems, controls and evidence for compliance assessments, but it does not issue audit reports, attestations or certifications. Independent auditors and certification bodies make those determinations.
- Access control: Document who can deploy process definitions, administer the engine and view process data, and show how those roles are enforced.
- Configuration evidence: Keep versioned configuration for the engine, database and runtime so you can show the state at any date.
- Patching records: Track security patches and upgrades, including dates and approvals, because the engine is open source and you carry the patch responsibility.
- Logging and audit trails: Confirm that process and administrative actions are logged in a form your auditors accept.
- Auditor scope: Ask your auditor which controls they expect to test before the platform is in production.
Before committing, confirm with your auditor which control evidence they will accept and who in your organization owns each piece.
What does moving off Camunda 8 cost in effort, time and internal skills?
What drives the effort of moving off Camunda 8?
The effort is driven mainly by how many process models you run, how much custom code sits behind service tasks and workers, and how many connectors and integrations each process depends on. A small set of BPMN models that call a few REST services is a very different job from hundreds of models with bespoke Zeebe workers, custom exporters and event-driven connectors into core banking or claims systems. Ask for an inventory of process definitions, worker code, connector types, external systems and monitoring dependencies before comparing quotes. The same inventory shows which models are live, which are versioned but idle, and which need to be rebuilt rather than ported.
Can our team move off Camunda 8 without an outside partner?
Some teams can, particularly where engineers already run Java services, understand BPMN and own their deployment pipeline. The harder parts are rebuilding the job-worker model on a different engine, replacing Camunda Operate and Tasklist monitoring and user tasks, and standing up the database, backup, high availability and upgrade routine that Camunda 8 Self-Managed previously ran for you. A partner can run that work under a fixed scope, or cover only the parts your team lacks capacity or skills for. Decide the split before you start, and treat a proof of concept on one representative process as the test of whether in-house delivery is realistic.
What skills do our engineers and architects need for an engine migration?
Engineers need working knowledge of BPMN 2.0, the Java runtime, relational databases and the REST API of the chosen engine. Architects need to decide how process state, job execution, user task assignment and audit history will be stored and retained, and how the engine will be deployed, scaled and patched. Expect to spend time on operational skills that Camunda 8 hid behind a managed or Enterprise-supported stack, such as tuning the database, configuring the job executor, and writing alerting for stuck instances. Check each candidate engine's documentation and community activity yourself, because the skill mix differs between Flowable, Operaton and CIB seven.
How does the Camunda 7 Community Edition end of life affect our timing?
Camunda 7 Community Edition received its final feature release, 7.24, on October 14, 2025, and no further releases or security patches follow for the community version. Its GitHub repository was archived on November 4, 2025. If you still run Camunda 7 Community Edition, you carry unpatched risk now, and any move from it is more urgent than a move from Camunda 8. Camunda 7 Enterprise is supported to April 9, 2030, with fee-based extended support from April 2030 through April 2032, so an Enterprise customer has a different deadline. Confirm which edition and version each application runs before setting a date.
Do we need a Camunda 8 Enterprise license for non-production testing?
No. According to Camunda's licensing documentation, Camunda 8 Self-Managed may be used without a commercial license only for non-production purposes, under the Camunda Self-Managed Non-Production license. Production use of Camunda 8 Self-Managed from version 8.6 requires the Self-Managed Enterprise Edition. Confirm the exact terms for your version and for any internal staging or customer-facing demo environment with Camunda before you rely on them, because the boundary between test and production use depends on how the environment is used.
How do we choose between Flowable, Operaton and CIB seven, and how do we test the choice?
Shortlist engines against your own requirements: BPMN coverage, whether you need CMMN or DMN, REST API compatibility with existing clients, how you handle long-running and event-driven flows, and how the project is governed. Flowable is an Apache-2.0 engine supporting BPMN, CMMN and DMN, and offers commercial editions. Operaton is an Apache-2.0 BPMN 2.0 engine born from the Camunda 7 codebase, with a stated compatible REST API and database schema plus an OpenRewrite recipe for Camunda 7 migration. CIB seven is an Apache-2.0 framework whose core is a native BPMN 2.0 engine. Test each candidate by running your three most complex models, including a failure and retry case, and measure the operational work involved, not only throughput.
What does a fixed-scope engagement with DeployOpen cover?
DeployOpen plans, implements, customizes, integrates, hardens, backs up, upgrades and documents self-hosted open-source platforms inside your own cloud accounts, data centers or air-gapped networks. For a Camunda 8 exit, a fixed-scope engagement would typically cover the chosen engine's deployment, process model conversion, worker and connector rework, integration testing, backup and recovery setup, and documentation for your team. Scope, deliverables and timelines are agreed in writing before work starts, and DeployOpen does not publish a price list, so a quote follows from the written scope. DeployOpen prepares systems and evidence for compliance assessments but does not issue audit reports or certifications.
What does ongoing support look like after the engine is live?
After go-live, the recurring work is patching the engine and its Java runtime, upgrading the database, monitoring job execution and incidents, reviewing backups and restore tests, and handling changes to process models. Ongoing support, upgrades and continuous testing are available from DeployOpen as retainers, and their scope is agreed in writing like any other engagement. Ask any provider what response times, upgrade windows and out-of-hours coverage are included, and whether those terms are written into the agreement. Your internal team still owns business decisions about which processes change and when.
How DeployOpen scopes, migrates and supports the replacement
DeployOpen is a Chainscore Labs company that plans, implements, integrates, hardens, backs up and documents self-hosted open-source platforms inside your own cloud accounts, data centers or air-gapped networks. For a Camunda 8 replacement, we start by agreeing in writing which engine, models and workloads are in scope before any build work begins.
How we scope
- Engagements are fixed-scope, with scope and deliverables agreed in writing before work starts.
- We inventory your running Camunda 8 models, workers, connectors and any Camunda 7 process instances still in flight.
- We confirm which engine fits your BPMN, DMN and CMMN needs, and which Camunda features need a replacement pattern.
How we build
- We deploy the chosen engine, such as Flowable, Operaton or CIB seven, into your infrastructure with your database and identity setup.
- We rebuild workers and integrations, and convert or re-test BPMN models against the target engine's behavior.
- We run security testing of the APIs and deployment, and document the controls and evidence your assessors will ask for.
How we hand over
- We document architecture, runbooks, configuration and model conversion decisions so your team can operate the platform.
- We walk your engineers through deployment, monitoring, backup and restore procedures in your own environment.
- We deliver the migration plan, cutover steps and open risks as written deliverables you keep.
How we support
- Ongoing support, upgrades and continuous testing are available as a retainer after handover.
- Retainers can cover engine upgrades, patching, backup verification and periodic security testing of your workflows.
- Ask any provider to confirm in writing the response commitments and what is excluded from support before signing.
