---
title: "Letta Pricing, Features & Alternatives (2026)"
description: "Letta review: Agent Framework tool — Free tier, plans, pros & cons, and the best Letta alternatives compared for startups in 2026."
source: https://appstackbuilder.com/tools/letta
retrieved: 2026-08-24
---

![Letta logo](https://appstackbuilder.com/logos/letta.png)

[Agent Framework](https://appstackbuilder.com/categories/agent-framework)Free tier

# Letta: Pricing, Features & Alternatives

Agents with persistent memory — the MemGPT research, productised.

Category

Agent Framework

Pricing

Free tier available

Free tier

Yes

Best for

Agent Framework — memory, stateful

[Visit Letta official site](https://www.letta.com)

## Letta Pricing Plans (2026)

| Plan               | Price              | Highlights                                                                                   |
| ------------------ | ------------------ | -------------------------------------------------------------------------------------------- |
| Open sourcePopular | Free (self-hosted) | Persistent agent memory · Memory blocks and archival storage · Agent Development Environment |
| Cloud              | $20 / month        | Hosted agents · Managed memory storage · Usage dashboards                                    |

Pricing summary: Free · paid from $20/mo. Always confirm current pricing on the official site.

## Key Letta Features

* ✓Persistent agent memory
* ✓Memory blocks and archival storage
* ✓Agent Development Environment
* ✓REST API

### ✓ Pros

* +Memory is the design centre, not an add-on
* +Agents survive restarts with state intact
* +Comes from the MemGPT paper

### ✗ Cons

* −Younger project with a moving API
* −Memory model is opinionated

## Best Letta Alternatives

[Compare all ](https://appstackbuilder.com/tool-alternatives/letta)

[![Mastra logo](https://www.google.com/s2/favicons?domain=mastra.ai&sz=128)MastraFree](https://appstackbuilder.com/tools/mastra)[![Pydantic AI logo](https://www.google.com/s2/favicons?domain=ai.pydantic.dev&sz=128)Pydantic AIFree](https://appstackbuilder.com/tools/pydantic-ai)[![Vercel AI SDK logo](https://www.google.com/s2/favicons?domain=sdk.vercel.ai&sz=128)Vercel AI SDKFree](https://appstackbuilder.com/tools/vercel-ai-sdk)[![LangChain logo](https://www.google.com/s2/favicons?domain=langchain.com&sz=128)LangChainFree · paid from $39/mo](https://appstackbuilder.com/tools/langchain)[![LangGraph logo](https://www.google.com/s2/favicons?domain=langchain.com&sz=128)LangGraphFree](https://appstackbuilder.com/tools/langgraph)[![LlamaIndex logo](https://www.google.com/s2/favicons?domain=llamaindex.ai&sz=128)LlamaIndexFree](https://appstackbuilder.com/tools/llamaindex)

## Letta FAQ

What is Letta used for?⌄

Letta is a agent framework tool. Agents with persistent memory — the MemGPT research, productised.

Is Letta free?⌄

Yes — Letta has a free tier you can start with, and paid plans for more usage and features.

How much does Letta cost?⌄

Letta offers a free tier, with paid plans starting at $20/month.

What are the best Letta alternatives?⌄

Popular Letta alternatives include Mastra, Pydantic AI, Vercel AI SDK, LangChain, LangGraph. Compare pricing and features on our Letta alternatives page.

## Not sure if Letta fits your stack?

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