Softwr

Automation Integration · head to head

Flowise vs Letta

Flowise logo

Flowise

Automation Integration

Build AI Agents, Visually

From
Free
Rated
-
Full reviewWebsite
Letta logo

Letta

Automation Integration

Machines that learn

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Flowise enterprise tier requires custom pricing with no published rates; Letta free tier limited to 3 stateful agents
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Flowise and Letta actually diverge.

Attributes where Flowise and Letta differ
AttributeFlowiseLetta

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

What people use each for

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

Flowise

  • Building multi-agent systems with orchestrated workflowsnot Letta
  • Creating chatbots that retrieve knowledge from uploaded documentsnot Letta
  • Implementing human-in-the-loop approval for AI agent decisionsnot Letta
  • Deploying conversational AI without writing backend codenot Letta

Letta

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

Where each one falls short

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

Flowise

  • Enterprise tier requires custom pricing with no published rates

Letta

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

Pricing, plan by plan

Flowise

Free
  • FreeFree
    • 2 Flows & Assistants
    • 100 predictions per month
    • 5 MB storage
  • Starter$35/month
    • Unlimited flows & assistants
    • 10,000 predictions per month
    • 1 GB storage
  • Pro$65/month
    • 50,000 predictions per month
    • 10 GB storage
    • Unlimited workspaces

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

Which should you pick?

Choose Flowise if

  • You want to start without paying.
Flowise review

Choose Letta if

  • You want to start without paying.
Letta review

Questions people ask

Is Flowise or Letta better?
Neither clearly leads. Flowise starts at Free and Letta at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Flowise or Letta?
Flowise starts at Free and Letta at Free.
Does Flowise or Letta run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Flowise for free?
Both have a free tier, so you can try either at no cost before committing.
What is Flowise best used for?
Flowise is most often used for building multi-agent systems with orchestrated workflows, creating chatbots that retrieve knowledge from uploaded documents, implementing human-in-the-loop approval for ai agent decisions, deploying conversational ai without writing backend code. Of those, building multi-agent systems with orchestrated workflows and creating chatbots that retrieve knowledge from uploaded documents are not what Letta is typically brought in for.

Answered from the vendors’ own pages

Flowise: Does Flowise have a free tier?

Yes, Flowise offers a free plan with 2 flows and assistants, 100 predictions per month, 5 MB storage, and community support.

Source
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
Flowise: What is Flowise's Starter plan pricing?

The Starter plan costs $35 per month (first month free) and includes unlimited flows and assistants, 10,000 predictions per month, and 1 GB storage.

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
Flowise: How does Flowise charge for additional users?

Additional users on the Pro plan cost $15 per user per month. The Pro plan supports 5+ users with this per-user add-on pricing.

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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