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Software · head to head

Letta vs Temporal

L

Letta

Software

Machines that learn

From
On request
Rated
-
Full reviewWebsite
Temporal logo

Temporal

Software

Durable execution platform for fault-tolerant workflows.

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Temporal has a free tier, so it costs nothing to try first.
  • Each has a real cost: Letta the Developer API plan charges $0.10 per active agent per month plus $0.00015 per second of tool execution on top of a $20 per month base and pay-as-you-go LLM usage, as of August 2026.; Temporal cloud pricing scales with action volume, with per-million overage fees ($50 per million initially)

Where they differ

Only the attributes on which Letta and Temporal actually diverge.

Attributes where Letta and Temporal differ
AttributeLettaTemporal
Starting priceOn requestFree
Pricing modelusage-basedfreemium
Free tierNoYes
PlatformsWebWeb, API, Self-hosted

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

What people use each for

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

Letta

No use cases recorded yet. See the Letta review.

Temporal

  • AI pipeline orchestration and long-running AI workflowsnot Letta
  • Distributed system workflows requiring state durabilitynot Letta
  • Complex backend processes with retry requirementsnot Letta
  • High-volume asynchronous task executionnot Letta
  • Microservices coordination with guaranteed state consistencynot Letta

Where each one falls short

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

Letta

  • The Developer API plan charges $0.10 per active agent per month plus $0.00015 per second of tool execution on top of a $20 per month base and pay-as-you-go LLM usage, as of August 2026.

Temporal

  • Cloud pricing scales with action volume, with per-million overage fees ($50 per million initially)
  • Enterprise customers incur additional storage costs beyond base allocations
  • Self-hosted deployments require operational expertise to deploy and maintain the Temporal Service
  • No native workflow UI builder; workflows must be defined in code
  • Free tier limited to self-hosted option only; no free cloud tier

Pricing, plan by plan

Letta

On request

No published plan breakdown. See the Letta review.

Temporal

Free
  • Open-sourceFree
    • Self-hosted deployment
    • Full platform functionality
    • Community support
  • Essentials$100/month
    • 1 million actions monthly
    • 1 GB active storage
    • 40 GB retained storage
  • Business$500/month
    • 2.5 million actions monthly
    • 2.5 GB active storage
    • 100 GB retained storage
  • Enterprise$null/month
    • 10 million actions monthly
    • 10 GB active storage
    • 400 GB retained storage

Which should you pick?

Choose Letta if

Nothing in the data separates Letta from Temporal on the points above - pick on price and on how each one feels to use.

Letta review

Choose Temporal if

  • You want to start without paying.
  • You work on Web, API, Self-hosted.
Temporal review

Questions people ask

Is Letta or Temporal better?
Neither clearly leads. Letta starts at On request and Temporal at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Letta or Temporal?
Temporal has a free tier; the other does not. Paid plans start at On request for Letta and Free for Temporal.
Does Letta or Temporal run on more platforms?
Letta runs on Web. Temporal runs on Web, API, Self-hosted.
Can I use Temporal for free?
Yes. Temporal has a free tier, so you can try it without paying. Letta starts at On request.

Answered from the vendors’ own pages

Temporal: What programming languages does Temporal support?

Temporal provides native SDKs for Go, Java, .NET, PHP, Python, Ruby, Rust, and TypeScript.

Source
Temporal: Can I run Temporal on-premises or self-hosted?

Yes. Temporal is available as open-source software under the MIT license, allowing self-hosted deployment. Temporal Cloud is also available as a managed service alternative.

Source
Temporal: What is included in the free tier?

$1,000 in free credits for new users to explore Temporal Cloud. Self-hosted Temporal is available free with full platform functionality.

Source
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