Top 6 of 15 researched candidates
Alternatives to OpenAI Agents SDK (Python)
Find a better fit for what you need. Compare alternatives to OpenAI Agents SDK (Python) with sourced features, strengths and trade-offs side by side.
On this page
Your reason for switching
What needs to be different?
Choose up to three requirements, or see the closest matches now ↓.
Evidence-backed shortlist
Closest researched alternatives to OpenAI Agents SDK (Python)
Ordered by the requirements met, strengths preserved, explicit trade-offs and research coverage. Sponsorship does not enter the order.
- 01
AgentsKit
Composable MIT-licensed TypeScript packages for agent runtime, tools, memory, RAG and chat UI.
From FreeWhy it's on this listWrites code · YesA bundled coder skill writes real multi-file TypeScript against scoped filesystem and allowlisted shell tools, so the agent you assemble authors code rather than snippets.Evidence ↗
Where it improves on OpenAI Agents SDK (Python)
- +Reviews code · YesA codeReviewer persona ships with the skills package and reviews diffs for bugs, security and style in pull-request comment format; you host the review loop yourself.Evidence ↗
- +Claude · YesA native Anthropic adapter covers the Claude family with streaming, tool calls, vision and long context, and the homepage demo configures Claude as the runtime adapter.Evidence ↗
Trade-offs against OpenAI Agents SDK (Python)
No disadvantages found in the criteria researched so far.
34/35 researched criteria · 1 not established - 02
Google Agent Development Kit (ADK)
Open-source framework for building, evaluating and deploying AI agents in Python, TypeScript, Go, Java or Kotlin.
From FreeWhy it's on this listClaude · YesClaude is supported in Python and Java, either through the registry wrapper on Google Cloud Agent Platform or directly against Anthropic with your own API key.Evidence ↗
Where it improves on OpenAI Agents SDK (Python)
- +Open models · YesOpen-weight models run through LiteLLM against local hosts such as Ollama, with separate documented paths for vLLM and on-device LiteRT-LM serving.Evidence ↗
- +MCP server · YesMCP works in both directions: agents consume external MCP servers as tools, and you can wrap ADK tools in an MCP server that any other MCP client can call.Evidence ↗
Trade-offs against OpenAI Agents SDK (Python)
No disadvantages found in the criteria researched so far.
34/35 researched criteria · 1 not established - 03
Pydantic AI
Open-source Python agent framework from the Pydantic team, with a typed agent loop and swappable models.
From FreeWhy it's on this listAnswers OpenAI Agents SDK's own durability gap directly: since its backwards-incompatible 2.0 release (2026-06-23), Pydantic AI wires into Temporal, DBOS, Prefect or Restate for real checkpointed, resumable execution — well past OpenAI's own manual RunState snapshots. The cost is operating that separate orchestrator yourself, and OpenAI's SDK ships an official TypeScript SDK where Pydantic AI is Python-only.
Where it improves on OpenAI Agents SDK (Python)
- +Claude · YesAnthropic is a first-class built-in provider with its own model class and install extra, selectable by a provider-prefixed model string like anthropic:claude-sonnet-4-6.Evidence ↗
- +Open models · YesOpen-weight models are reachable through OpenAI-compatible providers the docs enumerate, including local runtimes Ollama and vLLM as well as Hugging Face and Groq, so weights you host yourself are supported.Evidence ↗
- +In a browser · YesA browser chat interface ships in the package via Agent.to_web() or clai web, though the docs position it for local development and debugging rather than production use.Evidence ↗
Trade-offs against OpenAI Agents SDK (Python)
No disadvantages found in the criteria researched so far.
34/35 researched criteria · 1 not established - 04
Agno
Python SDK, open-source AgentOS runtime and hosted control plane for building and operating agents.
From FreeWhy it's on this listWrites code · YesShips a CodingTools toolkit whose documented job is editing files and running commands in a scoped project directory.Evidence ↗
Where it improves on OpenAI Agents SDK (Python)
- +Debugs and fixes · YesBug fixing is a documented pattern: reproduce, patch, rerun the failing tests.Evidence ↗
- +Reviews code · YesCode review over a diff is one of the documented coding-agent patterns.Evidence ↗
Trade-offs against OpenAI Agents SDK (Python)
- −Agent permissions · PartialRuns are unattended unless a tool is marked for approval; then the run pauses in your database until an admin resolves it.Evidence ↗
- −Open source · PartialSDK and AgentOS are Apache 2.0; the control plane is the commercial part and is not published as source.Evidence ↗
35/35 researched criteria - 05
Letta
Stateful agent harness, cloud and SDK for agents with persistent, git-versioned memory.
From FreeWhy it's on this listFixes a different limitation than checkpointing: OpenAI's Sessions persist conversation history per thread, but Letta agents are stateful, durable server objects whose memory, tools and identity persist across every run instead of resetting between sessions. The cost is a much smaller ecosystem (23.9K+ GitHub stars) and a single, smaller seed round behind it.
Where it improves on OpenAI Agents SDK (Python)
- +Writes code · YesAgents edit and create files in your repository, including from GitHub issues and PRs.Evidence ↗
- +Debugs and fixes · YesVendor states coding agents debug failures and run test suites.Evidence ↗
- +Reviews code · YesReviews diffs on demand or on every PR via the GitHub action's prompt input.Evidence ↗
Trade-offs against OpenAI Agents SDK (Python)
- −MCP server · NoMCP runs inbound only: Letta sessions consume stdio, HTTP and SSE MCP servers; no Letta MCP server is published.Evidence ↗
- −Audit log · NoNo administrative audit log is published; the Enterprise list stops at RBAC, SSO, quotas and dedicated support.Evidence ↗
35/35 researched criteria - 06
Mastra
Open-source TypeScript framework for building AI agents, with a hosted platform for running and observing them.
From FreeWhy it's on this listNot a lighter OpenAI SDK — a different ecosystem entirely: the only framework in this category built TypeScript-first rather than Python-first with a JS port, unifying agents, durable typed workflows and memory in one Apache-2.0 package. The trade-off is a much younger ecosystem (26.5K GitHub stars) and its deepest enterprise controls sit behind a separate source-available licence, not the open core.
Where it improves on OpenAI Agents SDK (Python)
- +Done-for-you service · PartialYou run the software, but Mastra sells professional services (Concierge, forward-deployed engineering) and enterprise support covering planning, prototyping and workshops.Evidence ↗
- +Claude · YesAnthropic is a named first-class provider in the model router; models are selected as provider/model-name strings.Evidence ↗
- +Open models · YesOpen-weight models run against any OpenAI-compatible endpoint on your own hardware; the vendor names gpt-oss, Qwen3 and DeepSeek.Evidence ↗
Trade-offs against OpenAI Agents SDK (Python)
No disadvantages found in the criteria researched so far.
35/35 researched criteria
Full datasheet
Compare OpenAI Agents SDK (Python) with the shortlist
Replace any candidate, show every criterion, or keep only differences and unknowns.
Compare alternatives to OpenAI Agents SDK (Python)
Keep OpenAI Agents SDK (Python) as the baseline and choose up to three alternatives. Differences and unanswered criteria appear first.
The digest
Done comparing? Watch the field move. Which agents actually ship, one short email, every Tuesday.
Advertisement
Sponsor this page. Alternatives pages are read by buyers actively choosing an agent, first-party inventory, clearly labelled, sold by the week.
Sponsor this page →Featured · top of your category →Method
How the shortlist is calculated
Comparable first. We consider listings in the same category as OpenAI Agents SDK (Python) and alternatives previously researched for this page.
Requirements first. We prioritise your selected needs, then shared strengths, fewer documented trade-offs, more complete research and finally alphabetical order.
Unknown remains unknown. Missing evidence is never converted into a benefit or a trade-off. Every improvement shown above comes from the same sourced criterion as the listing.
Independent order. Payment does not affect selection or ranking. Paid placements are labelled Advertisement.
Where next? Back to the full research, deeper into the category, or get your own agent into the index.
Advertise here
Reach buyers mid-decision. Reach builders choosing their next agent. Promote your brand with a display placement or bring your listing into focus with Featured.
Explore owner options →Advertise on this page →The digestFree
Which agents actually ship.
What we re-checked, what got added, and one number from the index. Tuesdays.
One-click unsubscribe