Letta Pricing: Plans & Cost Calculator 2026
Flat-rate pricing ranges from free to $20/mo across four plans, though self-hosting the open-source framework stays the cheapest route for developers.
Letta plans and pricing
Free
Get started at no cost
Pro
Personal use
API Plan
Teams building on the Letta API
Teams / Enterprise
Organizations with high volume / scale
Letta pricing: the quick answer
Letta is free for up to 3 agents and then charges $20/mo for two different paid plans as of July 8, 2026: Pro at $20/user/mo covers up to 20 stateful agents, while the API Plan is $20/account/mo but adds usage on top. On the API Plan you pay $0.10 per active agent each month and $0.00015 per second of tool execution, and LLM tokens pass through at the underlying model's cost. Teams and Enterprise are custom-quoted, and the open-source framework is free to self-host. Pro is the flat-fee route; the API Plan is the metered one.
- FreeFree
- Pro$20/mo
- API Plan$20/mo
- Teams / EnterpriseCustom
At $20/mo to start, Letta sits 31% below the $29/mo median across 10 ai agents tools we track.
Letta cost calculator
Letta Hidden Costs & Pitfalls
The API Plan's $20 is a base fee, not the whole cost. It meters agents, tool execution, and model tokens separately, so the real bill tracks how active your agents are.
Letta pricing, read against its live plans and category
Positioning
Letta enters the market well below the category median of $59/mo, offering two distinct entry-level tiers at $20/mo alongside a highly functional Free plan. The Pro plan at $20/mo targets users wanting centralized billing for OpenAI and Anthropic at standard API rates, while the API Plan at $20/mo shifts the focus to unlimited agents and usage-based tool execution. For developers building stateful agents, the Free plan is highly competitive as it allows up to 3 managed-state agents and external coding integrations without forcing an immediate upgrade. The $20/mo price point represents excellent value for developers looking to deploy long-term memory agents without paying a steep platform premium.
Cost drivers
- 1Pay-as-you-go overage charges apply for LLM usage on the Pro plan once weekly and monthly quotas are exceeded.
- 2Tool execution billing applies to the API Plan, which can scale up costs rapidly depending on agent activity.
- 3Bring-your-own-key (BYOK) support is restricted to the Free and Teams/Enterprise tiers, meaning Pro users are locked into Letta's centralized billing.
Watch-outs
The pricing structure forces a rigid choice between the Pro and API plans, both priced at $20/mo, meaning users must choose between capped stateful agents with centralized billing or unlimited agents with variable tool execution fees. There is also potential friction regarding how the platform positions itself against open-source memory alternatives.
Strengths
The Pro plan at $20/mo offers best framework for persistent memory agents.
- Best framework for persistent memory agents
- Open source and transparent
- Unique MemGPT architecture
What users say
“Letta took an afternoon to create an agent. Making the agent unique was 15 minutes.”
“Letta is very good at what they do - there”
Editor’s take
Individual developers and hobbyists should start with the Free plan to test the stateful agent framework, while production-focused developers should opt for the $20/mo API Plan to unlock unlimited agents. Teams requiring enterprise-grade SSO and custom model deployments will need to negotiate custom enterprise pricing. If you need a more established workflow automation platform with deep AI integrations, consider n8n starting at $20/mo.
Oleh KemFounder & Lead AnalystLetta price history
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Frequently asked questions
Sources & verification
| Source | What was checked | Last checked |
|---|---|---|
| Official Pricing Page | Source of verified tiers | July 8, 2026 |
| Official Website | Official vendor website | — |
| G2 | G2 verified user reviews · 3.9/5 · 1,317 reviews | — |
| PeerSpot | PeerSpot enterprise peer reviews | — |
Every fact on this Letta pricing page is tied to a named source and a verification date. Freshness-sensitive figures trace to the sources above; verify against the vendor before relying on them.
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