AI SDK alternatives
AI SDK by Vercel costs Free (OSS) and is open source. If you need something cheaper, open source, self-hosted or simply different, here are 10 alternatives that do the same job, ranked by how widely they are used, with the differences that matter.
10 AI SDK alternatives, by popularity
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A framework for building LLM applications and agents from composable parts: model integrations, tools, retrievers and prebuilt agent abstractions. Available for Python and JavaScript.
- More widely used (Gid Score 77 vs 67)
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A low-level orchestration framework for building stateful agents as graphs, with durable execution, persistence and human-in-the-loop steps. Available for Python and JavaScript.
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An open-source SDK from AWS for building and controlling agents in Python and TypeScript.
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Anthropic's SDK that exposes the agent loop, tools and context management behind Claude Code, for building custom agents in Python and TypeScript.
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A TypeScript framework for building agents and AI workflows, with memory, evals, retrieval and observability built in.
- Less widely used (Gid Score 59 vs 67)
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A batteries-included agent harness built on LangGraph, with planning, a virtual file system and sub-agents for long-running tasks.
- Less widely used (Gid Score 57 vs 67)
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A full-stack SDK for agent-native application frontends with chat UI, generative UI, shared state and human-in-the-loop for React, Angular, Vue, React Native and chat channels; the team maintains the AG-UI protocol.
- Less widely used (Gid Score 57 vs 67)
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Cloudflare's SDK for building stateful agents that run on Workers and Durable Objects.
- Less widely used (Gid Score 56 vs 67)
- Growing fast: usage up 28% in 30 days
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OpenAI's lightweight framework for multi-agent workflows, with handoffs, guardrails, sessions and tracing. Available for Python and TypeScript.
- Less widely used (Gid Score 54 vs 67)
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A framework for programming language models with declarative modules and optimizers instead of hand-written prompts.
- Less widely used (Gid Score 54 vs 67)
AI SDK vs alternatives at a glance
| Agent | Price | Free to start | Open source | MCP | Local models | Gid Score |
|---|---|---|---|---|---|---|
| AI SDK | Free (OSS) | ✓ | ✓ | ✓ | ✓ | 67 |
| LangChain | Free (OSS) | ✓ | ✓ | ✓ | ✓ | 77 |
| LangGraph | Free (OSS) | ✓ | ✓ | ✓ | ✓ | 69 |
| Strands Agents | Free (OSS) | ✓ | ✓ | ✓ | ✓ | 63 |
| Claude Agent SDK | Free (OSS) | ✓ | ✓ | ✓ | ? | 60 |
| Mastra | Free (OSS) | ✓ | ✓ | ✓ | ✓ | 59 |
| Deep Agents | Free (OSS) | ✓ | ✓ | ✓ | ✓ | 57 |
| CopilotKit | Free + $39/mo | ✓ | ✓ | ✓ | ? | 57 |
| Cloudflare Agents SDK | Free (OSS) | ✓ | ✓ | ✓ | ? | 56 |
| OpenAI Agents SDK | Free (OSS) | ✓ | ✓ | ✓ | ? | 54 |
| DSPy | Free (OSS) | ✓ | ✓ | ✓ | ✓ | 54 |
Prices from the vendors' pricing pages; features from official docs (“?” means not documented). Full feature comparison · All prices
How teams use these tools
Run LangChain's Open Deep Research multi-agent pipeline locally
LangChain's open-source deep research agent, built on LangGraph, runs research sub-agents in parallel, compresses what they find and writes a final report. It works with many mode…
On Deep Research Bench, the default GPT-4.1 configuration scored 0.4309 and the GPT-5 configuration 0.4943.
How Cornerstone OnDemand cut database diagnosis time with Strands Agents on Amazon Bedrock
Cornerstone OnDemand's three-person Enterprise DataOps team built Orion AI, a multi-agent system on Amazon Bedrock and Strands Agents, in six months. It speeds up database inciden…
As reported by AWS, database diagnosis time dropped from 45 minutes to 10 minutes, a 78% reduction.
Build a CI-health monitoring agent with the Claude Agent SDK and GitHub MCP
In this Anthropic cookbook notebook, an agent gets the official GitHub MCP server and is told to look over recent CI runs. It reports failing jobs, flaky patterns and recommended …
A status summary of recent CI runs and what triggered them.
FAQ
What is the best alternative to AI SDK?
By usage, the closest alternative is LangChain, followed by LangGraph, Strands Agents, Claude Agent SDK.
Is there a free alternative to AI SDK?
None of the closest alternatives has a free tier.
Is there an open-source alternative to AI SDK?
Not among the closest alternatives we track.
How do these AI SDK alternatives compare on price?
LangChain: Free (OSS); LangGraph: Free (OSS); Strands Agents: Free (OSS); Claude Agent SDK: Free (OSS); Mastra: Free (OSS); Deep Agents: Free (OSS).
AI SDK: pricing, features and stats · All agent frameworks and SDKs · Find the right agent in 4 questions