Softwr

Automation Integration · head to head

Letta vs mParticle

Letta logo

Letta

Automation Integration

Machines that learn

From
Free
Rated
-
Full reviewWebsite
mParticle logo

mParticle

Automation Integration

The customer data platform for multi-channel marketing

From
$500/month
Rated
-
Full reviewWebsite

The short version

  • Only Letta has a free tier, so it costs nothing to try first.
  • Each has a real cost: Letta free tier limited to 3 stateful agents; mParticle no pricing is published at any level, and the page offers only a pricing request or a sales conversation
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Letta and mParticle actually diverge.

Attributes where Letta and mParticle differ
AttributeLettamParticle
Starting priceFree$500/month
Pricing modelfreemiumusage-based
Free tierYesNo
PlatformsWebWeb, Mobile
FoundedUnknown2013

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 Letta

Nothing recorded that mParticle does not also cover.

Only in mParticle

  • Data collection
  • Audience building
  • Segmentation
  • Data governance
  • Real-time sync
  • Privacy management
  • Analytics
  • 100+ integrations

What people use each for

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

Letta

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

mParticle

  • Collecting customer event data once and routing it to many destinationsnot Letta
  • Building a customer data platform across web, mobile and server sourcesnot 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

mParticle

  • No pricing is published at any level, and the page offers only a pricing request or a sales conversation
  • No free tier, minimum commitment or cost driver is stated anywhere on the pricing page

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

mParticle

$500/month
  • Starter$500/month
    • Basic features
    • Email support
  • Professional$1500/month
    • Advanced features
    • Priority support
  • Enterprise$5000/month
    • Custom solutions
    • Dedicated support

Which should you pick?

Choose Letta if

  • You want to start without paying.
Letta review

Choose mParticle if

  • You need data collection.
  • You work on Web, Mobile.
  • You also want audience building.
mParticle review

Questions people ask

Is Letta or mParticle better?
Neither clearly leads. Letta starts at Free and mParticle at $500/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Letta or mParticle?
Letta has a free tier; the other does not. Paid plans start at Free for Letta and $500/month for mParticle.
Does Letta or mParticle run on more platforms?
Letta runs on Web. mParticle runs on Web, Mobile.
Can I use Letta for free?
Yes. Letta has a free tier, so you can try it without paying. mParticle starts at $500/month.
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 mParticle is typically brought in for.
What can Letta do that mParticle cannot?
mParticle covers Data collection, Audience building, Segmentation, Data governance.

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
mParticle: How much does mParticle cost?

mParticle does not publish pricing on its website. The pricing page directs customers to request a quote or contact the sales team through their contact forms.

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
mParticle: What is mParticle's pricing model?

mParticle uses a quote-based pricing model. Interested customers can request pricing information through the contact form, but specific rates and billing options are not publicly disclosed.

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
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