Alternatives
10 best Letta alternatives
Tools that cover the same task as Letta (code), ranked by how completely their pricing, free tier and API access are documented. Checked Oct 4, 2026.
- Letta starts at
- $20/mo
- Free plan
- Free plan
- API
- API available
- 01
Mem0
Mem0 provides persistent memory infrastructure for AI agents and applications so context survives across sessions, users, and agents. The platform offers hosted plans with SDK integration plus open-source options for developers building production agents that need durable recall.
Best for: Agent builders and app teams that need hosted memory layers with defined add and retrieval quotas.
- 02
Pre.dev
pre.dev is a long-horizon coding agent that plans, builds, and verifies software over extended runs in the browser or terminal. It connects to many SaaS tools, publishes previews, and sells separate RL coding tasks to AI labs through pre.dev Labs.
Best for: Developers and teams who want an autonomous coding agent with planning, verification, integrations, and optional enterprise RL task sourcing.
- 03
Freestyle
Freestyle provides full Linux VMs purpose-built for long-running AI agents with millisecond startup, live cloning, pause/resume, nested Docker, and custom networking. Developers use the VMs for coding agents, browser automation, and containerized workloads.
Best for: Teams building autonomous agents that need persistent Linux environments, previews, and Docker inside the VM.
- 04
GoCodeo
Plans scale premium model requests, autocompletions, and deployments for solo developers and teams.
Best for: Software engineers who want an IDE-integrated agent for building, asking, and testing code with tiered premium model access.
- 05
KERNEL
KERNEL provides cloud browser infrastructure for AI agents and web automations, spinning up sandboxed Chromium sessions with stealth, managed auth, GPU acceleration, live view, and telemetry. Developers connect via CDP, WebDriver BiDi, Playwright, OpenAPI, MCP, or official SDKs in TypeScript, Python, and Go.
Best for: Teams building QA, healthcare, e-commerce, or GTM agents that need reliable real-browser automation at scale.
- 06
Tiptap Editor 3.0 Beta
Tiptap is a headless rich-text editor framework with 100+ extensions and a paid Tiptap Platform for collaboration, comments, DOCX conversion, AI toolkit agents, and cloud documents. Developers embed the open-source editor or buy hosted platform tiers for production document apps.
Best for: Product teams building Notion-like, legal, or AI-native editors who need extensible React components plus optional hosted collaboration.
- 07
Cosine
Cosine, hosted at cosine.sh, is a sovereign AI lab training specialized coding agents and models for secure environments. It offers Lumen Scout, Outpost, and Sovereign models plus CLI and cloud surfaces with transparent credit-based plans for developers and regulated teams.
Best for: Developers and organizations that need frontier coding agents inside secure or air-gapped deployments with credit-based usage.
- 08
Defang
Defang helps engineering teams become AI-native while keeping sovereignty over cloud, models, data, and deployment. Its product line includes Defang Station for running agents, Defang Deploy for shipping to your own cloud accounts, and Defang Forge for building capability, framed around an AI-Native Maturity Model and ROI workflow.
Best for: Engineering leaders and platform teams who want to run and deploy AI agents and apps in AWS accounts they control rather than a black-box vendor runtime.
- 09
Kompy
Plans meter monthly credits with concurrency and request-rate limits for developers and AI agents.
Best for: Developers and agent builders who need structured Walmart catalog and pricing history without maintaining scrapers.
- 10
Langfuse
Langfuse is an open-source LLM engineering platform for tracing, evaluating, and improving AI agents with collaborative debugging and metrics. Langfuse Cloud offers hosted Hobby, Core, and Pro tiers metered in observability units.
Best for: AI engineers who need open-source-friendly observability and eval workflows without building tooling in-house.
Letta alternatives: common questions
What is the best free alternative to Letta?
Mem0 has an ongoing free plan. Hobby tier is free with unlimited end users, 10,000 add requests per month, and 1,000 retrieval requests per month. Free plans change, so check the vendor before relying on one.
What is the cheapest Letta alternative?
GoCodeo has the lowest listed starting price at $9/mo, compared with $20/mo for Letta.
Which Letta alternatives have an API?
Mem0, Pre.dev, Freestyle, KERNEL, Tiptap Editor 3.0 Beta mention API or developer access.