AI Agent Builders

Agno vs Letta

Compare Agno and Letta side-by-side. See feature differences and pricing in the AI Agent Builders category.

by Agno

No reviews yet

Pricing: Free plan with a local control plane; Pro $150 a month billed monthly for 3 seats and 1 live connection; extra seat $30, connection $95; Enterprise by quote.

Agno is an open-source AI agent platform: a Python SDK, a self-hosted AgentOS runtime and a control plane, for engineering teams shipping agents to production.

17 /18 features Full profile

Letta

by Letta

No reviews yet

Pricing: Free plan; Pro $20/mo; API Plan $20/mo plus usage; Teams Pro $20 per seat/mo; Enterprise by quote. Billed monthly.

Letta is a code-first AI agent harness and SDK for developers building stateful agents with git-versioned memory, run on Letta's cloud or self-hosted.

13 /18 features Full profile

Feature Comparison

AI Agent Builders features side-by-side

Feature	Agno 17/18 features	Letta 13/18 features
Visual agent workflow canvas Assemble the agent's steps on a canvas.	Yes	No
Custom tool and function definitions Give the agent your own callable functions.	Yes	Yes
Model provider choice per agent Point different agents at different models.	Yes	Yes
Retrieval-augmented knowledge bases Attach documents the agent retrieves from at run time.	Yes	No
Multi-agent handoff and delegation One agent passes work to another.	Yes	Yes
Conversation state and checkpointing Resume a long run instead of restarting it.	Yes	Yes
Structured output schema validation Force replies into a schema and reject the rest.	Yes	Yes
Input and output guardrails Filter unsafe or off-policy content on both sides.	Yes	No
Human-in-the-loop approval steps Pause a workflow for a person to approve.	Yes	Yes
Built-in execution tracing See every step, tool call and token inside the builder.	Yes	No
Prompt versioning in the builder Change a prompt without redeploying, and roll it back.	Yes	Yes
Agent evaluation and test suites Score an agent against fixed cases before release.	Yes	Yes
MCP server support Connect tools over the Model Context Protocol.	Yes	Yes
Webhook and event triggers Start an agent from an external event.	Yes	Yes
Code-first SDK Define the agent in code as well as in the interface.	Yes	Yes
Deploy an agent as an API endpoint Call the finished agent over HTTP.	Yes	Yes
Embeddable agent chat widget Drop the agent into a site or app as a chat surface.	No	No
Self-hosted agent runtime Run the built agents on your own infrastructure.	Yes	Yes
Overall Rating	No reviews yet	No reviews yet

Agno 17/18 features

Visual agent workflow canvas: Yes
Custom tool and function definitions: Yes
Model provider choice per agent: Yes
Retrieval-augmented knowledge bases: Yes
Multi-agent handoff and delegation: Yes
Conversation state and checkpointing: Yes
Structured output schema validation: Yes
Input and output guardrails: Yes
Human-in-the-loop approval steps: Yes
Built-in execution tracing: Yes
Prompt versioning in the builder: Yes
Agent evaluation and test suites: Yes
MCP server support: Yes
Webhook and event triggers: Yes
Code-first SDK: Yes
Deploy an agent as an API endpoint: Yes
Embeddable agent chat widget: No
Self-hosted agent runtime: Yes

No reviews yet

Letta 13/18 features

Visual agent workflow canvas: No
Custom tool and function definitions: Yes
Model provider choice per agent: Yes
Retrieval-augmented knowledge bases: No
Multi-agent handoff and delegation: Yes
Conversation state and checkpointing: Yes
Structured output schema validation: Yes
Input and output guardrails: No
Human-in-the-loop approval steps: Yes
Built-in execution tracing: No
Prompt versioning in the builder: Yes
Agent evaluation and test suites: Yes
MCP server support: Yes
Webhook and event triggers: Yes
Code-first SDK: Yes
Deploy an agent as an API endpoint: Yes
Embeddable agent chat widget: No
Self-hosted agent runtime: Yes

No reviews yet

Pricing

Agno

Free plan with a local control plane; Pro $150 a month billed monthly for 3 seats and 1 live connection; extra seat $30, connection $95; Enterprise by quote.

See all plans

Letta

Free plan; Pro $20/mo; API Plan $20/mo plus usage; Teams Pro $20 per seat/mo; Enterprise by quote. Billed monthly.

See all plans

Explore Each Product

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