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Software · head to head

Letta vs Dify

L

Letta

Software

Machines that learn

From
On request
Rated
-
Full reviewWebsite
D

Dify

Software

The Platform for Production-Ready Agentic Workflows

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Dify 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.; Dify the free Sandbox plan includes only 200 message credits total and one team member; the $590 per year Professional plan raises that to 5,000 message credits per month, as of August 2026.

Where they differ

Only the attributes on which Letta and Dify actually diverge.

Attributes where Letta and Dify differ
AttributeLettaDify
Starting priceOn requestFree
Pricing modelusage-basedfreemium
Free tierNoYes

Identical on both: 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.

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.

Dify

  • The free Sandbox plan includes only 200 message credits total and one team member; the $590 per year Professional plan raises that to 5,000 message credits per month, as of August 2026.

Pricing, plan by plan

Letta

On request

No published plan breakdown. See the Letta review.

Dify

Free

No published plan breakdown. See the Dify review.

Which should you pick?

Choose Letta if

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

Letta review

Choose Dify if

  • You want to start without paying.
Dify review

Questions people ask

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

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