Letta vs Ray
A side-by-side look at Letta vs Ray: pricing, free plans and features, taken from each official website. Prices change often, so check the linked sources.
| Feature | Letta | Ray |
|---|---|---|
| Type | Tool · Automation & Agents | Tool · Automation & Agents |
| Made by | unknown | unknown |
| What it does | Platform for stateful agents: AI with advanced memory that can learn and self-improve over time. | Ray is an AI compute engine. Ray consists of a core distributed runtime and a set of AI Libraries for accelerating ML workloads. |
| Pricing model | Free | Free |
| Free tier | unknown | unknown |
| Current prices | unknown | unknown |
| Modalities | unknown | unknown |
| Key features | ai ai-agents llm llm-agent | data-science deep-learning deployment di |
| Context window | unknown | unknown |
| API | unknown | unknown |
| License | Proprietary service | Proprietary service |
| Web app | unknown | unknown |
| Mobile apps | unknown | unknown |
| Desktop app | unknown | unknown |
| Links | Website ↗Deekoya listing | Website ↗Deekoya listing |
Letta vs Ray: pricing and features
Letta
Letta is a platform for building stateful agents that have advanced memory and can learn and self-improve over time. It offers tools for creating AI assistants, coworker bots, and automated workflows.
Pricing
The official site lists several plans: $0 /month for limited agents with 5 MiB of storage per memory repository; $20 /month for Letta Auto with weekly and monthly quotas; $20 /month for unlimited agents at $0.10 /active agent / month; Teams Pro at $20 /seat /month; and an API Plan where tool execution is billed at $0.00015 /second. These figures were read from the official site.
Key features
- Stateful agents with shared memory
- Cloud agents and sandboxes
- Slack and GitHub integrations
- Dynamic workflows
- Self-hosting capability
- CLI for quick setup
Source: official homepage, official pricing page · checked 2026-10-26
Ray
Ray is an open source AI compute engine that provides a core distributed runtime and AI libraries for accelerating machine learning workloads. It is designed to manage, execute, and optimize compute needs across a variety of AI tasks.
Pricing
The official site lists the pricing as "Free" and also mentions a "Try Ray with $100 credit" offer. This information was read from the official site.
Key features
- Core distributed runtime
- AI libraries for ML acceleration
- Parallel Python code execution
- Multi-modal data processing
- Model training and serving
- Batch inference and reinforcement learning
Source: official homepage · checked 2026-10-26
FAQ
Which is free, Letta vs Ray?
Letta: has a free plan or trial per its official site; Ray: has a free plan or trial per its official site.
What is the difference between Letta vs Ray?
Letta: Letta is a platform for building stateful agents that have advanced memory and can learn and self-improve over time. Ray: Ray is an open source AI compute engine that provides a core distributed runtime and AI libraries for accelerating machine learning workloads.