Softwr

Software · head to head

Inngest vs Letta

I

Inngest

Software

Unbreakable Agents. Invisible Infra.

From
On request
Rated
-
Full reviewWebsite
L

Letta

Software

Machines that learn

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Inngest the free Hobby tier pauses function execution entirely once its 50,000 monthly executions are used, rather than allowing pay-as-you-go overage, as of August 2026.; 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.

Where they differ

Only the attributes on which Inngest and Letta actually diverge.

Attributes where Inngest and Letta differ
AttributeInngestLetta

Identical on both: starting price (On request), pricing model (usage-based), free tier (No), platforms (Web), user rating (Not yet rated), category (Unknown).

Where each one falls short

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

Inngest

  • The free Hobby tier pauses function execution entirely once its 50,000 monthly executions are used, rather than allowing pay-as-you-go overage, as of August 2026.

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.

Pricing, plan by plan

Inngest

On request

No published plan breakdown. See the Inngest review.

Letta

On request

No published plan breakdown. See the Letta review.

Which should you pick?

Choose Inngest if

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

Inngest review

Choose Letta if

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

Letta review

Questions people ask

Is Inngest or Letta better?
Neither clearly leads. Inngest starts at On request and Letta at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Inngest or Letta?
Inngest starts at On request and Letta at On request.
Does Inngest or Letta run on more platforms?
Both run on Web, so platform support will not decide this one for you.
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