OpenSpec vs dify
OpenSpec and dify share 3 technologies: Tailwind CSS, yaml, and Zod. OpenSpec is written in TypeScript and dify in Python.
LinkedInWhat they share and what sets them apart
Fission-AI
OpenSpec
Spec-driven development (SDD) for AI coding assistants.
TypeScript74kRead on November 5, 2026, at commit 3e4d5f0What is OpenSpec built with?Only in OpenSpec
- Inquirer
- ora
In common
langgenius
dify
Build Agentic workflows, RAG pipelines, with rich AI model and tool support on one collaborative workspace. Deploy on cloud, VPC, or self-hosted, so teams move from prototype to production without rebuilding the stack.
Python160.4kRead on November 4, 2026, at commit 1ac9aa0What is dify built with?Only in dify
- net/http
- Flask
psycopg2-binary
- Celery
- Redis
- Postgres
- SQLite
- MySQL
- Resend
- Sentry
werkzeug
- Hono
- React
- Vite
- Next.js
- pyjwt
- langsmith
markdown-it-py
- bleach
- Pydantic
- boto3
- js-yaml
- Ajv
@hono/node-server
class-variance-authority
- cn
- Base UI
@xmldom/xmldom
- sharp
- next-themes
lexical
react-sortablejs
@floating-ui/react
echarts
- react-textarea-autosize
- @tanstack/react-virtual
@monaco-editor/react
- @pierre/highlights
embla-carousel-autoplay
elkjs
motion
- pele
@heroicons/react
- streamdown
- dompurify
- unist-util-visit
- html-to-image
katex
mediabunny
- qrcode.react
remark-directive
Side by side
OpenSpecdify
SizeLines written by people and agents, without generated ones; code files, without tests.
OpenSpec144,693 lines written218 code files
dify2,369,007 lines written6,557 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.
OpenSpec28.9% of its commits signed by AIWith Claude Code, Codex, CodeRabbit, Cursor, Mistral Vibe, GitHub Copilot, Qwen Code, and Crush
dify5.1% of its commits signed by AIWith GitHub Copilot, Claude Code, Gemini CLI, Codex, Jules, Devin, Cursor, and Warp
ActivityFrom GitHub and its history, on the day SeeRepo read it.
OpenSpecLast push November 4, 2026967 commits73,952 stars
difyLast push November 4, 202614,820 commits160,382 stars
TestsThe files that test the code, and the share of code files a test imports.
OpenSpec245 test files74.3% of its code files have a test that imports them
dify4,748 test files67.4% of its code files have a test that imports them
Frequently asked questions
Which is bigger, OpenSpec or dify?
dify, with 2,369,007 lines written; OpenSpec has 144,693.
The proof: langgenius/dify's code at commit 1ac9aa0
Which has more GitHub stars, OpenSpec or dify?
dify, with 160,382 stars; OpenSpec has 73,952.
The proof: langgenius/dify on GitHub
Which has more tests, OpenSpec or dify?
dify, with 4,748 test files; OpenSpec has 245.
The proof: langgenius/dify's code at commit 1ac9aa0
Which was updated more recently, OpenSpec or dify?
Both got their last push on November 4, 2026.
The proof: Fission-AI/OpenSpec's commits on GitHub
Which has more commits signed by AI, OpenSpec or dify?
OpenSpec: an AI signed 28.9% of its commits, with Claude Code, Codex, CodeRabbit, Cursor, Mistral Vibe, GitHub Copilot, Qwen Code, and Crush; in dify, 5.1%.
The proof: the commits each tool signed in Fission-AI/OpenSpec
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