Softwr

Automation Integration · head to head

Camunda vs Letta

Camunda logo

Camunda

Automation Integration

BPMN process orchestration engine, now source-available rather than open source

From
On request
Rated
-
Full reviewWebsite
Letta logo

Letta

Automation Integration

Machines that learn

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Letta has a free tier, so it costs nothing to try first.
  • Each has a real cost: Camunda camunda 7 Community Edition stopped receiving security patches after the 7.24 release in October 2025, so free production deployments are now running unpatched software.; Letta free tier limited to 3 stateful agents
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Camunda and Letta actually diverge.

Attributes where Camunda and Letta differ
AttributeCamundaLetta
Starting priceOn requestFree
Pricing modelquotefreemium
Free tierNoYes
PlatformsWeb, Linux, Docker, KubernetesWeb

Identical on both: user rating (Not yet rated), category (Automation Integration).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Camunda

  • BPMN 2.0 execution
  • DMN decision tables
  • Zeebe engine
  • Operate console
  • Job workers
  • Optimize

Only in Letta

Nothing recorded that Camunda does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Camunda

  • Long-running business processes crossing several services where the state must be visible to non-developersnot Letta
  • Insurance claims or loan origination where the process model is itself a compliance artefactnot Letta
  • Replacing orchestration logic scattered across microservices with one engine that owns the state machinenot Letta
  • A regulated organisation that needs an auditable record of how each process instance actually executednot Letta

Letta

  • Building agents with memory for continuous learningnot Camunda
  • Enabling reflection during idle periods via sleep-computenot Camunda
  • Managing agent context and extracting learningsnot Camunda

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Camunda

  • Camunda 7 Community Edition stopped receiving security patches after the 7.24 release in October 2025, so free production deployments are now running unpatched software.
  • Camunda 8 Self-Managed is source-available under the Camunda License 1.0, not open source: production use requires a paid licence, and organisations that adopted Camunda for its Apache licence have to renegotiate that decision.
  • Migrating from Camunda 7 to 8 is a rewrite rather than an upgrade because the engine, the API and the persistence model all changed, and there is no in-place migration for running instances.
  • Camunda 8 Self-Managed has substantial infrastructure requirements including Zeebe brokers, Elasticsearch and Identity, which is a considerable operations burden compared with the single database that Camunda 7 needed.
  • Pricing is not published at all, so evaluating total cost requires a sales process, and there is no way to size a budget before committing engineering time to a proof of concept.

Letta

  • Free tier limited to 3 stateful agents
  • Pro tier capped at 20 stateful agents
  • API Plan usage charges apply beyond base tier

Pricing, plan by plan

Camunda

On request
  • Camunda 8$undefined/year
    • Self-Managed under Camunda License 1.0, production licence required
    • SaaS with a thirty day full trial
    • Free unlimited BPMN and DMN modelling after the trial

Letta

Free
  • FreeFree
    • Limited agents
    • Limited Letta Auto usage
    • Bring your own API keys
  • Pro$20/month
    • Weekly and monthly Letta Auto quota
    • Pay-as-you-go overage
    • Up to 20 stateful agents
  • API Plan$20/month
    • Unlimited agents
    • $0.10/active agent/month
    • $0.00015/second for tool execution
  • Teams Pro$20/month
    • Per seat pricing
    • Add teammates
    • Letta Auto quota

Which should you pick?

Choose Camunda if

  • You need bpmn 2.0 execution.
  • You work on Web, Linux, Docker, Kubernetes.
  • You also want dmn decision tables.
Camunda review

Choose Letta if

  • You want to start without paying.
Letta review

Questions people ask

Is Camunda or Letta better?
Neither clearly leads. Camunda starts at On request and Letta at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Camunda or Letta?
Letta has a free tier; the other does not. Paid plans start at On request for Camunda and Free for Letta.
Does Camunda or Letta run on more platforms?
Camunda runs on Web, Linux, Docker, Kubernetes. Letta runs on Web.
Can I use Letta for free?
Yes. Letta has a free tier, so you can try it without paying. Camunda starts at On request.
What is Camunda best used for?
Camunda is most often used for long-running business processes crossing several services where the state must be visible to non-developers, insurance claims or loan origination where the process model is itself a compliance artefact, replacing orchestration logic scattered across microservices with one engine that owns the state machine, a regulated organisation that needs an auditable record of how each process instance actually executed. Of those, long-running business processes crossing several services where the state must be visible to non-developers and insurance claims or loan origination where the process model is itself a compliance artefact are not what Letta is typically brought in for.
What can Camunda do that Letta cannot?
Camunda covers BPMN 2.0 execution, DMN decision tables, Zeebe engine, Operate console.

Answered from the vendors’ own pages

Camunda: Is Camunda still open source?

No. Camunda 8 Self-Managed ships under the Camunda License 1.0, which is source-available and requires a paid production licence.

Letta: How much does Letta cost?

Letta offers a free tier, then Pro plan at $20/month with up to 20 stateful agents, API Plan at $20/month base plus usage charges ($0.10/active agent/month, $0.00015/second for tool execution), and Teams Pro at $20/seat/month.

Source
Camunda: What happened to Camunda 7?

Its final feature release, 7.24, was in October 2025 and the Community Edition receives no further patches. Enterprise support runs to April 2030.

Letta: How many agents can I create on the free plan?

The free tier is limited to 3 stateful agents. Pro plan allows up to 20 stateful agents, while API Plan offers unlimited agents.

Source
Camunda: Can I upgrade from 7 to 8?

Not in place. The engine, API and persistence changed, so it is a rewrite of the integration layer.

Letta: Does Letta charge for tool execution?

On the API Plan, Letta charges $0.00015 per second for tool execution. The Pro and Teams Pro plans include execution in their monthly fee.

Source
Camunda: What does it cost?

Camunda does not publish prices. Both self-managed production and SaaS require a quote.

Share

Related pages

More on Camunda

More on Letta

Keep looking

Other head to heads