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What is Letta?

Letta empowers you to create, deploy, and manage agents on a substantial scale, facilitating the development of production applications that leverage agent microservices through REST APIs. By embedding memory functionalities into your LLM services, Letta significantly boosts their advanced reasoning capabilities and offers transparent long-term memory via the cutting-edge technology developed by MemGPT. We firmly believe that the core of programming agents is centered around the programming of memory itself. This innovative platform, crafted by the creators of MemGPT, features self-managed memory specifically tailored for LLMs. Within Letta's Agent Development Environment (ADE), you have the ability to unveil the comprehensive sequence of tool calls, reasoning procedures, and decisions that shape the outputs produced by your agents. Unlike many tools limited to prototyping, Letta is meticulously designed by systems experts for extensive production, ensuring that your agents can evolve and enhance their efficiency over time. The system allows you to interrogate, debug, and refine your agents' outputs, steering clear of the opaque, black box solutions often provided by major closed AI corporations, thus granting you total control over the development journey. With Letta, you are set to embark on a transformative phase in agent management, where transparency seamlessly integrates with scalability. This advancement not only enhances your ability to optimize agents but also fosters innovation in application development.

What is EverOS?

EverOS is a persistent memory platform for AI agents that combines long-term context, multimodal ingestion, self-evolving skills, and cross-platform compatibility. The system is designed to sit inside an existing agent loop and retrieve relevant context before each large language model call. Rather than sending an entire conversation or knowledge history into the model every time, EverOS selects the most relevant stored memories for the current task. Its memory architecture is built to support low-latency retrieval while reducing token usage and maintaining continuity across sessions. EverOS also introduces self-evolving skills, which turn successful task executions into cases that can later be consolidated into reusable procedural knowledge. Repeated successful patterns can be promoted into shared skills that are available to multiple agents without requiring manual curation or brittle workflow logic. The platform accepts multimodal sources including PDFs, images, spreadsheets, documents, slides, URLs, and Markdown and automatically parses, chunks, and indexes them for retrieval. EverOS works with agent environments and interfaces such as Claude Code, Codex, OpenClaw, Hermes, MCP, and OpenAI- and Anthropic-compatible SDKs. Its Markdown-first portability model allows organizations to export memories in a readable, version-controllable format and move between hosted and self-managed deployments. Teams can start with EverOS Cloud or deploy the Apache 2.0 open source version on their own infrastructure using the same API and memory format. EverOS is designed for developers, AI infrastructure teams, and enterprises that want agents to retain context, learn reusable procedures, and operate more efficiently across tools and environments. EverOS achieves 93.05% on the LoCoMo long-term memory benchmark (research: arXiv:2601.02163).

Media

Media

Integrations Supported

BAND
ElectroNeek

Integrations Supported

Tanka

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Free Version

Pricing Information

Free
Free: $0/month. 3 Memory Spaces, 50,000 MCU/month, 100,000 Retrieval API calls/month.
Pro: $25/month (free during Early Access). 8 Memory Spaces, 250,000 MCU/month, 500,000 Retrieval API calls/month, includes Self-Evolving Skills.
Enterprise: Custom pricing. Custom limits, dedicated account manager, private deployment available.
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS
On-Prem

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

Letta

Company Location

United States

Company Website

www.letta.com

Company Facts

Organization Name

EverMind

Date Founded

2025

Company Location

United States

Company Website

evermind.ai/everos

Categories and Features

Agentic AI

Not specified

AI Agent Builders

Not specified

AI Agent Frameworks

Not specified

AI Agents

Not specified

AI Memory Layers

Not specified

Categories and Features

AI Memory Layers

Not specified

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