# Letta review (2026): is the free plan enough? > Stateful agents with long-term memory, from the MemGPT team Checked Nov 12, 2026 ยท graded Nov 12, 2026 by ToolGPA. Letta is built by the creators of MemGPT and makes agents that keep memory between sessions and improve with use. The main product is Letta Code, an open-source agent harness run from a command-line tool, plus an Agent SDK for building stateful agents into your own apps. Hosted agents can also run in Slack and other channels. - **Category:** AI Agents - **Made by:** Letta, Inc. - **Website:** https://www.letta.com - **Runs on:** Web - **Who should skip it:** Tight if you stay free, because there is no included model usage and 3 agents is the cap. - **Facts last checked:** Nov 12, 2026 ## Pricing As of Nov 12, 2026, Letta has a free plan, and paid plans start at $20 per month. - **Pricing model:** Free plan - **Free plan:** Up to 3 stateful agents and 5 MiB per memory repository; bring your own API keys or an external coding plan. - **Free trial:** None listed. | Plan | Price | What you get | | --- | --- | --- | | Free | $0 per month | Up to 3 stateful agents; no included model usage, so bring your own keys or buy credits. | | Pro | $20 per month | Includes $20 of credits a month for any model and remote sandboxes, up to 20 stateful agents. | | Teams Pro | $20 per seat / month | Everything in Pro, plus teammates in an organization, shared agents and access control. | | Enterprise | Custom | Volume-based pricing with role-based access control, SAML/OIDC SSO and dedicated support. | Read from https://docs.letta.com/pricing on Nov 12, 2026. Prices change, so confirm with Letta before buying. ## Key features - **Persistent agent memory:** Agents are stateful: they carry memory across sessions, and memory repositories are versioned in git so changes can be tracked. - **Letta Code CLI:** An open-source harness installed with npm for coding agents, personal assistants and agents that work on local files, with skills and schedules. - **Agent SDK and app server:** Developers can embed stateful agents in their own applications, with a self-hosting option and a protocol for external tools. - **Channels and cloud agents:** Cloud-hosted agents connect to Slack and a GitHub integration; the channels guide also lists Telegram, Discord, WhatsApp and Signal. - **Bring your own keys:** All plans accept your own model API keys, and usage then goes through your provider account instead of using Letta credits. ## Good for - Developers building agents that need memory across sessions - Coding-agent users who already pay for ChatGPT or another coding plan - Teams that want shared agents with permissions ## Worth knowing - The free plan has no included model usage; you bring your own keys or buy credits. - Credits are spent by model usage at provider-based rates, and the pricing page says heavy coding use can run $100 to $200 a month or more. - Server-side tool time is billed at $0.00015 per second against credits, and web search and fetch tools also cost credits. - Adding members to an organization needs Teams Pro; Pro covers a single user. ## ToolGPA grades **GPA: 2.0 out of 4**, graded Nov 12, 2026. Letta builds agents that keep memory between sessions, with a free plan, a $20 Pro plan and an open-source coding CLI. The free plan includes no model usage, so you bring your own keys, and the pricing page says heavy coding use can run $100 to $200 a month or more. - **Value for money: C.** Pro is $20 a month with $20 of credits, around the category's $21 middle. Teams Pro is $20 a seat. - **Free plan and trial: C.** Free covers 3 stateful agents but no model usage, so you bring your own keys or buy credits. - **Features: C.** Persistent memory, a coding CLI, an SDK, and Slack and GitHub channels. Memory repositories are capped at 5 MiB on Free, and web search and tools spend credits. - **Ease of use: D.** No store rating, and the main route is an npm-installed CLI and SDK, so you work from a command line. - **Platforms and integrations: B.** Web plus a CLI and SDK, with Slack, GitHub, Telegram, Discord, WhatsApp and Signal channels. These are ToolGPA's own grades. Graded from this listing, whose facts were read from Letta's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews. ## Where it stands among AI agents - Letta's GPA of 2.0 is higher than 64 of the 178 other AI agents we grade, and level with 16. - It stands best on platforms and integrations (B, above 47 of 178) and worst on ease of use (D, above 0). - Its paid plans start at $20 a month, against a middle price of $25 for the category: 29 of the 98 others that charge start lower. - On features, ease of use and platforms it scores 2.0 out of 4. 26 tools score higher and cost less. The category's chart of price against score: https://toolgpa.com/charts/ai-agents ## Keep it, or make your own? **Keep it.** To replace Letta you would be making an AI agent, with the models and the safeguards behind it. That is not a weekend's work, with an AI app builder or without one. It costs $240 a year. Letta is open source, so there is a third way: take its code and run it yourself. - You could not: An AI agent, with the models and the safeguards behind it. - You could not: Connections to other products, each kept working as those products change. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. ## Works with Slack, GitHub, Telegram, Discord, WhatsApp, Signal **Tags:** AI agents, AI features, Open source, Public API, Workflow automation ## Alternatives - [Mem0](https://toolgpa.com/tools/mem0): Memory layer that lets AI agents remember across sessions. [Compare](https://toolgpa.com/compare/letta-vs-mem0) - [CrewAI](https://toolgpa.com/tools/crewai): Multi-agent platform to build, run and govern AI agents. [Compare](https://toolgpa.com/compare/crewai-vs-letta) - [OpenHands](https://toolgpa.com/tools/openhands): Open-source platform for AI coding agents and automations. [Compare](https://toolgpa.com/compare/letta-vs-openhands) - [Hermes Agent](https://toolgpa.com/tools/hermes-agent): Open-source AI agent with persistent memory and a messaging gateway. [Compare](https://toolgpa.com/compare/hermes-agent-vs-letta) - [Mastra](https://toolgpa.com/tools/mastra): TypeScript framework for building and running AI agents. [Compare](https://toolgpa.com/compare/letta-vs-mastra) ## Sources The prices, plans, platforms and features above were read from these pages on Nov 12, 2026: - https://www.letta.com - https://docs.letta.com/pricing - https://docs.letta.com/overview - https://www.letta.com/terms-of-service/ - https://github.com/letta-ai/letta-code Page: https://toolgpa.com/tools/letta Listed by ToolGPA (toolgpa.com).