12 alternatives to Cloudflare Agents SDK that we cover: Mastra, OpenAI Agents SDK, LangGraph, Semantic Kernel, Langflow, Botpress, Gumloop, Lindy, Microsoft Copilot Studio, Pydantic AI, Relevance AI, Voiceflow. The table shows the evidence behind each entry and whether its pricing has been verified.
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MIT-licensed TypeScript SDK for stateful agents on Durable Objects, with MCP, scheduling and browser tools.
Cloudflare's agents package runs each agent as a Durable Object with its own state, storage and lifecycle. Since late October it has shipped weekly: 0.31.0 (Oct 27) made the MCP packages optional peers, 0.32.0 (Oct 29) rebuilt Agent Skills loading, and 0.33.0 (Nov 3) moved the Pi harness to Pi 1.5 with no rollback.
What it does well: MIT licence; Each agent keeps its own state and storage and hibernates when idle, per the README; Detailed release notes with upgrade steps; Built-in MCP, scheduling, workflows and a browser tool.
Where it falls short: Pre-1.0 with frequent breaking changes (0.31.0, 0.32.0 and 0.33.0 all break something); Pi 1.4 to 1.5 storage migration cannot be rolled back; Tied to Cloudflare Workers and Durable Objects.
Latest version we cover: agents@0.33.0 (Nov 3, 2026). Vendor: Cloudflare.
When to look beyond Cloudflare Agents SDK
Skip Cloudflare Agents SDK if:
You need a stable API: the package is pre-1.0 and three of the last four releases had breaking changes
Evidence labels: Reported means written from official sources; Tested means a small smoke test with its scope stated. See methodology. Pricing status shows how well we could verify prices; open each tool page for the note.
Verdict: A strong TypeScript option if you are building agents in a Node stack; read the breaking-change note on sessions before upgrading.
Pick Mastra if: TypeScript and Next.js teams building agents; Teams that need observability and tracing out of the box.
For agent building: Mastra is #6, Cloudflare Agents SDK is not ranked.
Latest release we cover: Mastra @mastra/core@1.79.0 on Oct 21, 2026. Cloudflare Agents SDK agents@0.33.0 on Nov 3, 2026.
Evidence: Mastra: Tested (smoke test, 2026-10-25, local 3B model (Qwen2.5-3B)). Cloudflare Agents SDK: Reported (not run by us).
Strength: Mastra: TypeScript-native. Cloudflare Agents SDK: MIT licence.
Main caveat: Mastra: Breaking change to agent controller sessions in this release. Cloudflare Agents SDK: Pre-1.0 with frequent breaking changes (0.31.0, 0.32.0 and 0.33.0 all break something).
Verdict: Pick it if you want a small, official framework for multi-agent flows on the OpenAI API; the update is incremental.
Pick OpenAI Agents SDK if: Python developers building agents on OpenAI models; Teams that want MCP tools plus approvals and sessions.
For agent building: OpenAI Agents SDK is #2, Cloudflare Agents SDK is not ranked.
Latest release we cover: OpenAI Agents SDK v0.24.0 on Oct 15, 2026. Cloudflare Agents SDK agents@0.33.0 on Nov 3, 2026.
Evidence: OpenAI Agents SDK: Tested (smoke test, 2026-10-25, local Qwen2.5-3B-Instruct, not vendor models). Cloudflare Agents SDK: Reported (not run by us).
Strength: OpenAI Agents SDK: MIT license, official OpenAI project. Cloudflare Agents SDK: MIT licence.
Main caveat: OpenAI Agents SDK: Releases are mostly dependency bumps and fixes. Cloudflare Agents SDK: Pre-1.0 with frequent breaking changes (0.31.0, 0.32.0 and 0.33.0 all break something).
Verdict: A dependable foundation for stateful agents; this release is a routine fix, so only update if the RemoteGraph or recursion fixes affect you.
Pick LangGraph if: Developers who want explicit control over agent state and flow; Teams running long-lived, resumable agents.
For agent building: LangGraph is #3, Cloudflare Agents SDK is not ranked.
Latest release we cover: LangGraph 1.2.17 on Oct 24, 2026. Cloudflare Agents SDK agents@0.33.0 on Nov 3, 2026.
Evidence: LangGraph: Tested (smoke test, 2026-10-25, local 3B model (Qwen2.5-3B)). Cloudflare Agents SDK: Reported (not run by us).
Strength: LangGraph: MIT license, large community. Cloudflare Agents SDK: MIT licence.
Main caveat: LangGraph: More concepts to learn than simpler SDKs. Cloudflare Agents SDK: Pre-1.0 with frequent breaking changes (0.31.0, 0.32.0 and 0.33.0 all break something).
Verdict: Microsoft's model-agnostic SDK for building AI agents; its README calls Microsoft Agent Framework the enterprise-ready successor.
Pick Semantic Kernel if: Existing .NET and Azure shops already on Semantic Kernel.
For agent building: neither Semantic Kernel nor Cloudflare Agents SDK has an editorial rank in this category.
Latest release we cover: Semantic Kernel python-1.47.0 on Nov 5, 2026. Cloudflare Agents SDK agents@0.33.0 on Nov 3, 2026.
Evidence: Semantic Kernel: Reported (not run by us). Cloudflare Agents SDK: Reported (not run by us).
Strength: Semantic Kernel: MIT license. Cloudflare Agents SDK: MIT licence.
Main caveat: Semantic Kernel: Successor product exists. Cloudflare Agents SDK: Pre-1.0 with frequent breaking changes (0.31.0, 0.32.0 and 0.33.0 all break something).
Verdict: MIT-licensed visual builder for AI agents and MCP servers with a very large GitHub following.
Pick Langflow if: Visual prototyping of RAG and agents; Exposing flows as MCP servers.
For agent building: neither Langflow nor Cloudflare Agents SDK has an editorial rank in this category.
Latest release we cover: Langflow (no version recorded) on Oct 26, 2026. Cloudflare Agents SDK agents@0.33.0 on Nov 3, 2026.
Evidence: Langflow: Tested (smoke test, 2026-10-26, no LLM involved). Cloudflare Agents SDK: Reported (not run by us).
Strength: Langflow: MIT license. Cloudflare Agents SDK: MIT licence.
Main caveat: Langflow: Hosted pricing not read. Cloudflare Agents SDK: Pre-1.0 with frequent breaking changes (0.31.0, 0.32.0 and 0.33.0 all break something).
Verdict: Agent builder for teams; plans start at $37 per month with 20k included credits.
Pick Gumloop if: Teams letting non-engineers build agents with IT controls.
For agent building: neither Gumloop nor Cloudflare Agents SDK has an editorial rank in this category.
Latest release we cover: Gumloop (no version recorded) on Oct 25, 2026. Cloudflare Agents SDK agents@0.33.0 on Nov 3, 2026.
Evidence: Gumloop: Reported (not run by us). Cloudflare Agents SDK: Reported (not run by us).
Strength: Gumloop: Credits transparent. Cloudflare Agents SDK: MIT licence.
Main caveat: Gumloop: No permanent free plan seen. Cloudflare Agents SDK: Pre-1.0 with frequent breaking changes (0.31.0, 0.32.0 and 0.33.0 all break something).
Verdict: AI 'employee' builder that connects to your tools; Free plan with $50 in credits that last 7 days, then credit-based plans.
Pick Lindy if: Non-technical teams automating assistant-style work.
For agent building: neither Lindy nor Cloudflare Agents SDK has an editorial rank in this category.
Latest release we cover: Lindy (no version recorded) on Oct 25, 2026. Cloudflare Agents SDK agents@0.33.0 on Nov 3, 2026.
Evidence: Lindy: Reported (not run by us). Cloudflare Agents SDK: Reported (not run by us).
Strength: Lindy: Quick start. Cloudflare Agents SDK: MIT licence.
Main caveat: Lindy: Free credits expire after 7 days. Cloudflare Agents SDK: Pre-1.0 with frequent breaking changes (0.31.0, 0.32.0 and 0.33.0 all break something).
Verdict: Microsoft's platform for creating and managing custom agents, workflows and apps with no code.
Pick Microsoft Copilot Studio if: Microsoft 365 organizations building internal agents.
For agent building: neither Microsoft Copilot Studio nor Cloudflare Agents SDK has an editorial rank in this category.
Latest release we cover: Microsoft Copilot Studio (no version recorded) on Oct 25, 2026. Cloudflare Agents SDK agents@0.33.0 on Nov 3, 2026.
Evidence: Microsoft Copilot Studio: Reported (not run by us). Cloudflare Agents SDK: Reported (not run by us).
Strength: Microsoft Copilot Studio: Microsoft ecosystem. Cloudflare Agents SDK: MIT licence.
Main caveat: Microsoft Copilot Studio: Pricing not read. Cloudflare Agents SDK: Pre-1.0 with frequent breaking changes (0.31.0, 0.32.0 and 0.33.0 all break something).
Verdict: Platform for specialist AI agents for sales, customer success, marketing and HR, with an embedded deployment team.
Pick Relevance AI if: Go-to-market teams wanting managed agent rollout.
For agent building: neither Relevance AI nor Cloudflare Agents SDK has an editorial rank in this category.
Latest release we cover: Relevance AI (no version recorded) on Oct 25, 2026. Cloudflare Agents SDK agents@0.33.0 on Nov 3, 2026.
Evidence: Relevance AI: Reported (not run by us). Cloudflare Agents SDK: Reported (not run by us).
Strength: Relevance AI: Deployment help. Cloudflare Agents SDK: MIT licence.
Main caveat: Relevance AI: Pricing not read. Cloudflare Agents SDK: Pre-1.0 with frequent breaking changes (0.31.0, 0.32.0 and 0.33.0 all break something).
Verdict: Platform for chat and voice AI agents for customer experience teams.
Pick Voiceflow if: CX teams building chat and voice agents.
For agent building: neither Voiceflow nor Cloudflare Agents SDK has an editorial rank in this category.
Latest release we cover: Voiceflow (no version recorded) on Oct 25, 2026. Cloudflare Agents SDK agents@0.33.0 on Nov 3, 2026.
Evidence: Voiceflow: Reported (not run by us). Cloudflare Agents SDK: Reported (not run by us).
Strength: Voiceflow: Chat and voice. Cloudflare Agents SDK: MIT licence.
Main caveat: Voiceflow: Pricing not read. Cloudflare Agents SDK: Pre-1.0 with frequent breaking changes (0.31.0, 0.32.0 and 0.33.0 all break something).
FAQ
What are the best alternatives to Cloudflare Agents SDK?
Mastra, OpenAI Agents SDK, LangGraph, Semantic Kernel, Langflow, Botpress, Gumloop, Lindy, Microsoft Copilot Studio, Pydantic AI, Relevance AI, Voiceflow. Each is covered with a verdict on this site.
When should I use something other than Cloudflare Agents SDK?
Skip Cloudflare Agents SDK if: You need a stable API: the package is pre-1.0 and three of the last four releases had breaking changes; You do not want to run on Cloudflare.
