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semantic-kernel vs onyx

semantic-kernel and onyx share 8 technologies: OpenAI, AIOHTTP, azure-identity, MCP, defusedxml, jinja2, Pydantic, and OpenTelemetry. semantic-kernel is written in C# and onyx in Python.

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What they share and what sets them apart

microsoft

semantic-kernel

Integrate cutting-edge LLM technology quickly and easily into your apps

C#28.7kRead on November 8, 2026, at commit df1cb33What is semantic-kernel built with?

Only in semantic-kernel

  • Npgsql
  • Microsoft.Extensions.Hosting
  • EntityFramework
  • System.IdentityModel.Tokens.Jwt
  • Azure.AI.OpenAI
  • Microsoft.Extensions.AI.AzureAIInference
  • Microsoft.Extensions.AI.OpenAI
  • azure-ai-agents
  • Microsoft.Extensions.AI
  • azure-ai-projects
  • Microsoft.ML.OnnxRuntime
  • Handlebars.Net
  • YamlDotNet
  • DocumentFormat.OpenXml
  • Markdig
  • JsonSchema.Net
  • JsonSchema.Net.Generation
  • Microsoft.OpenApi
  • openapi-core
  • Microsoft.Extensions.Logging.Console
  • opentelemetry-api
  • Microsoft.Extensions.Logging
  • Microsoft.Extensions.Logging.Abstractions

In common

onyx-dot-app

onyx

Open Source AI Platform - AI Chat with advanced features that works with every LLM

Python33.3kRead on November 7, 2026, at commit a757433What is onyx built with?

Only in onyx

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
semantic-kernel538,799 lines written1,588 code files
onyx1,626,990 lines written3,906 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
semantic-kernel2.5% of its commits signed by AIWith GitHub Copilot, Claude Code, and Cursor
onyx11.7% of its commits signed by AIWith Claude Code, Devin, Cursor, CodeRabbit, GitHub Copilot, and Sweep
ActivityFrom GitHub and its history, on the day SeeRepo read it.
semantic-kernelLast push November 7, 20265,136 commits28,745 stars
onyxLast push November 7, 202611,391 commits33,270 stars
TestsThe files that test the code, and the share of code files a test imports.
semantic-kernel1,025 test files64.6% of its code files have a test that imports them
onyx3,158 test files45.7% of its code files have a test that imports them

Frequently asked questions

Which is bigger, semantic-kernel or onyx?
onyx, with 1,626,990 lines written; semantic-kernel has 538,799.

The proof: onyx-dot-app/onyx's code at commit a757433

Which has more GitHub stars, semantic-kernel or onyx?
onyx, with 33,270 stars; semantic-kernel has 28,745.

The proof: onyx-dot-app/onyx on GitHub

Which has more tests, semantic-kernel or onyx?
onyx, with 3,158 test files; semantic-kernel has 1,025.

The proof: onyx-dot-app/onyx's code at commit a757433

Which was updated more recently, semantic-kernel or onyx?
Both got their last push on November 7, 2026.

The proof: onyx-dot-app/onyx's commits on GitHub

Which has more commits signed by AI, semantic-kernel or onyx?
onyx: an AI signed 11.7% of its commits, with Claude Code, Devin, Cursor, CodeRabbit, GitHub Copilot, and Sweep; in semantic-kernel, 2.5%.

The proof: the commits each tool signed in onyx-dot-app/onyx

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