Softwr

Automation Integration · head to head

Letta vs Temporal

Letta logo

Letta

Automation Integration

Machines that learn

From
Free
Rated
-
Full reviewWebsite
Temporal logo

Temporal

Automation Integration

Durable execution platform for fault-tolerant workflows.

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Letta free tier limited to 3 stateful agents; Temporal cloud pricing scales with action volume, with per-million overage fees ($50 per million initially)
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Letta and Temporal actually diverge.

Attributes where Letta and Temporal differ
AttributeLettaTemporal
PlatformsWebWeb, API, Self-hosted

Identical on both: starting price (Free), pricing model (freemium), free tier (Yes), user rating (Not yet rated), category (Automation Integration).

What people use each for

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

Letta

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

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

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

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

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

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$500/month
    • 2.5 million actions monthly
    • 2.5 GB active storage
    • 100 GB retained storage
  • Enterprise$undefined/month
    • 10 million actions monthly
    • 10 GB active storage
    • 400 GB retained storage

Which should you pick?

Choose Letta if

  • You want to start without paying.
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 Free 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?
Letta starts at Free and Temporal at Free.
Does Letta or Temporal run on more platforms?
Letta runs on Web. Temporal runs on Web, API, Self-hosted.
Can I use Letta for free?
Both have a free tier, so you can try either at no cost before committing.
What is Letta best used for?
Letta is most often used for building agents with memory for continuous learning, enabling reflection during idle periods via sleep-compute, managing agent context and extracting learnings. Of those, building agents with memory for continuous learning and enabling reflection during idle periods via sleep-compute are not what Temporal is typically brought in for.

Answered from the vendors’ own pages

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
Temporal: What programming languages does Temporal support?

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

Source
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
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
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
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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