Mates

Letta Agent

by Letta

Stateful agents with long-term memory that run locally or in Letta's cloud, work on schedules and join Slack or Telegram.

WebsiteChangelogGitHub
Pricedocs.letta.com/pricing
Free
Free with your own keys, up to 3 agents; Pro $20/mo
Licensegithub.com/letta-ai
Open source
Apache-2.0 (Letta Code)
Platformsletta.com/agent
Web, Command line, Slack, Messaging apps
Browser, terminal; Slack, Discord, Telegram
Launchedgithub.com/letta-ai
Oct 25, 2025
Letta Code repo created

What it can do

The same 11 checks for every agent, each linked to the page it came from.

Its own cloud computerYesRemote sandboxes on Pro, or bring your own deviceDocs: Pricing
Uses a web browserNot documentedThe maker's pages don't sayNo source says
Remembers between chatsYesAgent
Routines and schedulesYesScheduled and proactive tasksAgent
App connectors or MCPYesCustom skills and toolsAgent
Asks before risky actionsNot documentedThe maker's pages don't sayNo source says
Teams or several agentsYesShared agents across a teamDocs: Pricing
Works in iMessage, WhatsApp or TelegramYesTelegram, DiscordAgent
VoiceNot documentedThe maker's pages don't sayNo source says
Bring your own model or keyYesYour own API keys or coding plansAgent
Can be self-hostedYesRun locally or in the cloudAgent

How it differs from Mates

Open source and can run on your own machine with your own model keys; Mates is closed, hosted only, with a computer per mate.

See Mates' entry

Similar agents

Other AI teammates in the directory.

agentes.chatTeam chat where AI agents work in channels with a role, budget and owner, and ask a person before sensitive actions.Wesley (@wescld) · Invite only
AppuBotAI teammates that run on your own computer, work in its real apps and answer you on Telegram, using an AI plan you already pay for.Sarthak Gupta · Free
Claude TagClaude as a shared teammate in Slack channels that takes tasks, remembers channel context and schedules its own work.Anthropic · $20/mo
CraftBotAutonomous agent that does computer work, plans its own tasks and builds its own internal tools. Self-host or use the hosted CraftBot Live.CraftOS · Free

Checked against Letta's own pages.

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