Letta
letta.com
Platform for building stateful agents with long-term memory.
Quick Information
- Category:
- AI Agents & Automation
- Pricing:
- Freemium
- Platforms:
- Web, API
- Free Plan:
- Yes
- API Available:
- Yes
- Last Verified:
- October 2026
What Is Letta?
Letta, built around the MemGPT research, is a platform for stateful agents with long-term memory. Trackers describe the mid-2026 plans as a Free tier, two $20-a-month plans and custom Enterprise pricing. Free is limited, with bring-your-own API keys and limited Letta Auto usage, and one listing says up to 3 agents with managed state. Pro at $20 a month is for personal use, with a Letta Auto weekly and monthly quota, pay-as-you-go overage and up to 20 stateful agents.
The API Plan, also $20 a month plus usage, is aimed at teams building on the Letta API. Per the official docs it includes unlimited agents with a per-active-agent monthly fee and a per-second charge for tool execution, and LLM tokens at the underlying model's cost. One source gives rates of $0.10 per active agent a month and $0.00015 per second of tool execution. The docs list a Teams Pro tier at $20 per seat per month, which conflicts with aggregators saying contact sales. The open-source framework is reported as free to self-host. Aggregators partly describe older lineups, so use docs.letta.com/pricing.
Letta suits developers who need agents that remember across sessions. Compare Mem0, Zep and LangGraph. Browse the AI Agents & Automation tools directory for more.
What Can You Use Letta For?
Agents with memory
Persistent state across sessions.
Building on an API
Production agent backends.
Letta Features
- Stateful agents — Managed memory.
- Letta Auto — Quota-based model access.
- Open-source framework — Free to self-host (one source).
Who Is Letta For?
- AI developers — Memory-first agents.
- Product teams — API-based deployment.
Letta Pros & Limitations
What We Like
- Memory built in
- Low entry price
- Open-source option
Limitations
- Pricing structure shifted and sources conflict
- Several usage meters
- Tokens billed at model cost
Letta Pricing
| Plan | Price | Main Features |
|---|---|---|
| Free | $0 | Limited agents and Letta Auto; bring your own keys |
| Pro | $20/month | Personal use, up to 20 stateful agents, pay-as-you-go overage |
| API Plan | $20/month plus usage | Unlimited agents, about $0.10 per active agent a month and $0.00015 per second of tool execution |
| Teams / Enterprise | Teams Pro $20/seat/month per docs; Enterprise custom | Conflicting sources |
Pricing was last verified October 2026. Check the official website for the latest pricing.
AI Listing Jungle Ranking
- Global Rank:
- #153
- Overall Score:
- 78.6/100
- Monthly Users:
- –
- Rank Change:
- ▼ 38
This ranking reflects AI Listing Jungle's own independent scoring methodology and is not an endorsement by Letta or its company. How Our Rankings Work
Frequently Asked Questions
Is Letta free?
There is a limited free tier and a free self-hosted framework.
How much is Pro?
$20 a month.
How is the API Plan billed?
$20 a month plus per-agent and per-second charges and model tokens.
What was Letta called?
MemGPT.
Our Take
Letta puts agent memory at the centre.
Check the official docs for current plans.
Letta Alternatives
Letta Comparisons
Ready to try Letta?
Visit the official website to get started.
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