Letta review (2026): is the free plan enough?
Stateful agents with long-term memory, from the MemGPT team
Black Friday: is there a Letta sale?
Letta report card
Fair · out of 4.0 · graded Nov 12, 2026
Best for developers building agents that remember across sessions
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.
Who Letta is for
- Fits if you are a developer who wants agents that keep their memory between runs
- Works for people who already pay for a coding plan and can bring that key
Who Letta is not for
- Tight if you stay free, because there is no included model usage and 3 agents is the cap
- Pricey if you code heavily, as the pricing page says $100 to $200 a month or more of usage
- Watch out: server tool time is billed at $0.00015 a second against your credits
- Watch out: more than one person needs Teams Pro, since Pro covers a single user
Why Letta gets a 2.0
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- CValue for moneyPro is $20 a month with $20 of credits, around the category's $21 middle. Teams Pro is $20 a seat.
- CFree plan and trialFree covers 3 stateful agents but no model usage, so you bring your own keys or buy credits.
- CFeaturesPersistent 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.
- DEase of useNo store rating, and the main route is an npm-installed CLI and SDK, so you work from a command line.
- BPlatforms and integrationsWeb plus a CLI and SDK, with Slack, GitHub, Telegram, Discord, WhatsApp and Signal channels.
What these grades rest on. 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. How we review and grade.
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<a href="https://toolgpa.com/tools/letta#review"><img src="https://toolgpa.com/badge/letta.svg" alt="Letta: 2.0 GPA on ToolGPA" width="196" height="56"></a>Where Letta stands among AI agents
Letta's GPA of 2.0 is higher than 26 of the 101 other AI agents we grade, and level with 9.
It stands best on platforms and integrations (B, above 20 of 101) and worst on ease of use (D, above 0).
Its paid plans start at $20 a month, against a middle price of $22.13 for the category: 20 of the 65 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4. 17 tools score higher and cost less.
Each grade against the category
Every bar is all 102 AI agents we grade, cut by the letter each got. Letta’s own letter is outlined.
- CValue for moneyAbove 17 of 101, level with 56
- CFree plan and trialAbove 28 of 101, level with 53
- CFeaturesAbove 1 of 101, level with 67
- DEase of useAbove 0 of 101, level with 13
- BPlatforms and integrationsAbove 20 of 101, level with 71
Price against what you get
Each dot is one of 70 AI agents. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Letta, 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.
That makes this kind of software worth paying for, not this one in particular: 66 of the 101 other AI agents grade higher. It costs $240 a year. Letta is open source, so there is a third way: take its code and run it yourself.
What you could not
- An AI agent, with the models and the safeguards behind it.
- Connections to other products, each kept working as those products change.
What this rests on. Letta’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Letta?
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.
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.
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.
Letta pricing
As of Nov 12, 2026, Letta has a free plan, and paid plans start at $20 per month.
- Starts at
- $20 per month
- 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 | $0per month | Up to 3 stateful agents; no included model usage, so bring your own keys or buy credits. |
| Pro | $20per month | Includes $20 of credits a month for any model and remote sandboxes, up to 20 stateful agents. |
| Teams Pro | $20per 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 docs.letta.com on Nov 12, 2026. Prices change, so confirm with Letta before you buy.
Works with
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- Letta vs Mem0
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- Letta vs CrewAI
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- Letta vs OpenHands
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- Letta vs Hermes Agent
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- Letta vs Mastra
Free plan · from $25/mo
Common questions
Does Letta have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Letta is listed for Web.
Does Letta have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Letta is listed for Web.
Is Letta open source?
Yes. Letta is open source, according to its own site.
Does Letta have an API?
Yes. Letta offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.