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semantic-kernel vs llama_index

semantic-kernel and llama_index share 11 technologies: OpenAI, AIOHTTP, azure-identity, azure-ai-agents, azure-ai-projects, MCP, defusedxml, jinja2, Pydantic, opentelemetry-api, and OpenTelemetry. semantic-kernel is written in C# and llama_index 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
  • Microsoft.Extensions.AI
  • Microsoft.ML.OnnxRuntime
  • Handlebars.Net
  • YamlDotNet
  • DocumentFormat.OpenXml
  • Markdig
  • JsonSchema.Net
  • JsonSchema.Net.Generation
  • Microsoft.OpenApi
  • openapi-core
  • Microsoft.Extensions.Logging.Console
  • Microsoft.Extensions.Logging
  • Microsoft.Extensions.Logging.Abstractions

In common

run-llama

llama_index

LlamaIndex is the document processing platform for AI

Python52.9kRead on November 10, 2026, at commit fe107aaWhat is llama_index built with?

Only in llama_index

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
semantic-kernel538,799 lines written1,588 code files
llama_index473,236 lines written2,055 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
llama_index0.2% of its commits signed by AIWith Claude Code, Cursor, and GitHub Copilot
ActivityFrom GitHub and its history, on the day SeeRepo read it.
semantic-kernelLast push November 7, 20265,136 commits28,745 stars
llama_indexLast push November 8, 20267,964 commits52,863 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
llama_index1,607 test files46.5% of its code files have a test that imports them

Frequently asked questions

Which is bigger, semantic-kernel or llama_index?
semantic-kernel, with 538,799 lines written; llama_index has 473,236.

The proof: microsoft/semantic-kernel's code at commit df1cb33

Which has more GitHub stars, semantic-kernel or llama_index?
llama_index, with 52,863 stars; semantic-kernel has 28,745.

The proof: run-llama/llama_index on GitHub

Which has more tests, semantic-kernel or llama_index?
llama_index, with 1,607 test files; semantic-kernel has 1,025.

The proof: run-llama/llama_index's code at commit fe107aa

Which was updated more recently, semantic-kernel or llama_index?
llama_index: its last push was on November 8, 2026, and semantic-kernel's on November 7, 2026.

The proof: run-llama/llama_index's commits on GitHub

Which has more commits signed by AI, semantic-kernel or llama_index?
semantic-kernel: an AI signed 2.5% of its commits, with GitHub Copilot, Claude Code, and Cursor; in llama_index, 0.2%.

The proof: the commits each tool signed in microsoft/semantic-kernel

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