Agentic Index
Agno vs Letta (2026)
Choose Agno for a general purpose high performance agent runtime and choose Letta when persistent, inspectable memory is the defining requirement. That verdict is the Agentic Index coverage score, graded from each vendor's own published materials.
Agno runs from 150 dollars a month with a free tier under Apache 2.0, while Letta offers a free tier, a Pro plan at 20 dollars a month, a usage based API, and an Apache 2.0 self host path. Note that Letta's product momentum has concentrated in Letta Code, its coding agent, so teams adopting it as pure memory infrastructure should pilot against the current roadmap before committing.
On the Agentic Index agent infrastructure ranking, Agno clears the bar and Letta does not. Agno documents all five production contract capabilities in full; Letta documents two of the five in full. 34 of the 186 vendors in the lane clear it. See the agent infrastructure ranking
This comparison is published by Agentic Index, an independent agentic AI vendor research platform. Agno and Letta are each graded against the same 14 capability Agentic Index taxonomy, from the vendor's own public materials under the Agentic Index verification standard, alongside 956 researched vendors. No vendor pays for placement and no vendor has reviewed this page. How this evidence is graded
Choose Agno if
- You want a fast, straightforward runtime for many kinds of agents
- Multi agent coordination with built in memory covers your state needs
- Predictable plan pricing beats metered credit consumption for your usage
Choose Letta if
- Agents that remember, learn, and persist across sessions are the product
- You want to inspect and edit agent memory state directly rather than trust a black box
- The MemGPT research lineage and stateful architecture match your technical bet
| At a glance | Agno | Letta |
|---|---|---|
| Category | Agent infrastructure | Agent infrastructure |
| Entry price | From $150/mo · free tier | Free tier · Pro $20/mo · API plan $20/mo plus usage · self-host free |
| Free / trial | Free tier | Free account, no card (up to 3 agents with managed state; BYOK unlimited locally) |
| Pricing confidence | public exact | public exact |
| Feature | A Agno |
L Letta |
|---|---|---|
| Action & orchestration | ||
|
Integrations & Tool Calling Ability to connect agents to real systems through native integrations, OAuth-authenticated actions, custom tools, APIs, webhooks, or MCP-compatible tools. |
Full / Explicit | Full / Explicit |
|
Workflow Orchestration Ability to sequence, branch, retry, route, and combine deterministic workflow nodes with autonomous agent steps. |
Full / Explicit | Full / Explicit |
|
Triggers & Channel Coverage How agents wake up and where they work: schedules, webhooks, message events, CRM events, inbox events, chat, email, voice, and collaboration tools. |
Full / Explicit | Full / Explicit |
| Knowledge & context | ||
|
Knowledge Grounding & RAG Ability to ground agent behavior in company data through document ingestion, retrieval, external knowledge APIs, semantic search, or RAG layers. |
Full / Explicit | Partial |
|
Memory & State Persistence Ability to persist context across a run, conversation, workflow, user, team, or longer-term memory layer. |
Full / Explicit | Full / Explicit |
| Control & trust | ||
|
Human Oversight & Guardrails Approval steps, consent checkpoints, escalation rules, structured guardrails, policy constraints, and pause/resume controls. |
Full / Explicit | Full / Explicit |
|
Security, Identity & Governance RBAC, SSO, auditability, encryption, least-privilege tool access, compliance posture, and data handling policy. |
Full / Explicit | Partial |
|
Observability & Auditability Traces, logs, execution histories, metrics, audit events, and debugging detail for production agent behavior. |
Full / Explicit | Partial |
|
Deployment & Data Residency Deployment modes and options, including SaaS, dedicated cloud, VPC, on-prem, hybrid, local runtime, and self-hosting. |
Full / Explicit | Full / Explicit |
| Solution readiness | ||
|
Prebuilt Agents, Templates & Packs Ready-made workflows, packaged employees, templates, blueprints, industry solutions, and role-specific agents that reduce time-to-value. |
Full / Explicit | Partial |
| Platform extensibility | ||
|
Model Flexibility & Routing Ability to work across multiple foundation models, route tasks to different models, or let buyers bring their own providers and keys. |
Full / Explicit | Full / Explicit |
|
APIs, SDKs & MCP Extensibility Composability layer: stable APIs, SDKs, MCP tool consumption/serving, custom tools, and integration into internal systems. |
Full / Explicit | Full / Explicit |
|
Testing, Debugging & Optimization Testing, debugging, scoring, retries, fallbacks, quality gates, and optimization loops for improving agent workflows before and after deployment. |
Full / Explicit | No / Not documented |
| Specialist automation | ||
|
Browser & Computer Use Browser, desktop, or remote/local computer control for workflows that cannot be handled through stable APIs alone. |
No / Not documented | No / Not documented |
Pricing snapshot
Sourced from the Index pricing dataset · open each vendor's profile for full detail.
| Pricing | A Agno |
L Letta |
|---|---|---|
|
Entry price Lowest public entry point |
From $150/mo · free tier | Free tier · Pro $20/mo · API plan $20/mo plus usage · self-host free |
|
Pricing confidence How public the numbers are |
Public, exact | Public, exact |
|
Billing Primary billing axis |
flat | usage |
|
Variable cost Workload / overage exposure |
Low variable cost | High variable cost |
|
Free tier / trial Try before you buy |
Free tierTrial
|
Free tier
|
|
Buying motion Self-serve vs sales call |
Mixed | Mixed |
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