Kong Reviews
Kong Reviews

Startup tech stacks: what 74 products are built with

Products startups have built, with the stack each one runs on read from its public code, linked to what each service costs.

  • n8n: Visual workflow automation with code and AI agents. Built with Express, TypeORM, PostgreSQL, SQLite, Redis.
  • Open WebUI: A self-hosted interface for local and cloud AI models. Built with SvelteKit, FastAPI, SQLAlchemy, Socket.IO.
  • Excalidraw: A virtual whiteboard for hand-drawn diagrams. Built with React, Vite, Vercel, Firebase, Socket.IO.
  • Immich: Self-hosted photo and video backup. Built with Flutter, SvelteKit, NestJS, Kysely, PostgreSQL.
  • uptime-kuma: A fancy self-hosted monitoring tool. Built with Express.
  • Hoppscotch: Open-source API development: REST, GraphQL and realtime. Built with Vue, Vite, Tauri, NestJS, GraphQL.
  • AFFiNE: Docs, whiteboards and databases in one open-source workspace. Built with React, BlockSuite, Electron, Capacitor, Rust.
  • Penpot: Collaborative interface design and prototyping on the web. Built with ClojureScript, React, Clojure, PostgreSQL, Valkey.
  • Plane: Open-source project management: work items, cycles and wiki. Built with React Router, MobX, Django, Celery, PostgreSQL.
  • Twenty: The open-source CRM, an alternative to Salesforce. Built with React, NestJS, GraphQL, PostgreSQL, Redis.
  • nanobot: Ultra-lightweight, open-source, self-hosted personal AI agent framework in Pytho. Built with React.
  • Cal.com: Open-source scheduling for people and teams. Built with Next.js, Prisma, PostgreSQL, Upstash, Auth.js (NextAuth).
  • Jan: An open-source ChatGPT alternative that runs offline. Built with Tauri, Rust, React, Vite, OpenAI API.
  • Outline: A collaborative knowledge base for growing teams. Built with React, Koa, Sequelize, PostgreSQL, Redis.
  • Umami: Privacy-first web and product analytics. Built with Next.js, React, Prisma, PostgreSQL.
  • Chatwoot: A shared inbox for customer support across channels. Built with Vue, Ruby on Rails, Sidekiq, PostgreSQL, Redis.
  • homepage: A highly customizable homepage (or startpage / application dashboard) with Docke. Built with Next.js, React, Auth.js (NextAuth).
  • karakeep: A self-hostable bookmark-everything app (links, notes and images) with AI-based . Built with React, Next.js.
  • Actual Budget: Local-first budgeting with optional device sync. Built with React, Express, SQLite.
  • Plausible Analytics: Lightweight web analytics without tracking cookies. Built with Elixir, Phoenix, PostgreSQL, ClickHouse.
  • Reflex: Build full-stack web applications in Python. Built with Python, Socket.IO.
  • Monica: A personal CRM for remembering the people in your life. Built with Vue, Laravel, Laravel Sanctum.
  • Activepieces: Connect apps and build workflows with AI and automation. Built with Fastify, TypeORM, PostgreSQL, Redis.
  • Firefly III: Self-hosted personal finance with budgets and reports. Built with Laravel, Laravel Passport, MySQL, PostgreSQL.
  • Dub: Short links, conversion tracking and affiliate programs. Built with Next.js, Vercel, Prisma, PlanetScale, Upstash.
  • Linkwarden: Collect, annotate, and preserve bookmarks together. Built with Next.js, React, Auth.js (NextAuth), PostgreSQL, Meilisearch.
  • Bluesky: Open social media, built on the AT Protocol. Built with React Native, Expo, AT Protocol, GrowthBook, Bitdrift.
  • Windmill: Turn scripts into workflows and internal applications. Built with SvelteKit, Rust, PostgreSQL.
  • Trigger.dev: Durable background jobs, AI workflows, and task monitoring. Built with Remix, React, Express, PostgreSQL, Redis.
  • Documenso: The open-source DocuSign alternative. Built with React Router, Hono, tRPC, Prisma, PostgreSQL.
  • openship: Self-hosted deployment platform. Built with Next.js, React.
  • romm: A beautiful, powerful, self-hosted ROM manager and player.. Built with Vue.
  • Mealie: Manage recipes, meal plans, and shopping lists at home. Built with Vue, FastAPI, SQLAlchemy.
  • Formbricks: Open-source surveys and experience management. Built with Next.js, Prisma, PostgreSQL, Redis, BullMQ.
  • Inbox Zero: An open-source AI assistant for your email. Built with Next.js, Vercel, Prisma, PostgreSQL, Upstash.
  • Owncast: Run your own live-video streaming site and chat. Built with Next.js, React, Go, SQLite, WebSocket.
  • Dawarich: Your location history, maps, and trips on your own server. Built with Ruby on Rails, Sidekiq, PostgreSQL, PostGIS, Redis.
  • Typebot: Build conversational forms and chatbots visually. Built with Next.js, React, Auth.js (NextAuth), PostgreSQL, Redis.
  • kaneo: 🎯 All you need. Nothing you don't. Open source project management that works fo. Built with React, Next.js.
  • Papermark: Share documents and data rooms, with page-by-page analytics. Built with Next.js, Vercel, Vercel, Prisma, PostgreSQL.
  • Wealthfolio: Track investments and net worth with local-first software. Built with React, Rust, Tauri, SQLite.
  • Workout.cool: Plan workouts and track strength-training progress. Built with Next.js, React, Prisma, PostgreSQL.
  • gpt-load: Self-hosted AI gateway for multi-channel, multi-credential setups — API keys and. Built with Vue.
  • bookorbit: BookOrbit: Your Reading Space. Built with Vue, Fastify.
  • ArcReel: AI Agent 驱动的开源可自部署视频工作台：将小说与剧本转为角色、场景、道具资产、分镜、视频和剪映草稿，支持跨镜头一致性、多供应商与费用追踪 | Self-. Built with FastAPI, React.
  • Rallly: Group scheduling polls without the back-and-forth. Built with Next.js, Vercel, Hono, tRPC, Prisma.
  • qui: A fast, single-binary qBittorrent web UI: manage multiple instances, automate to. Built with React.
  • grimmory: A self-hosted library for your ebooks, comics, and audiobooks. Built with Angular.
  • Observal: Observal is self-hosted registry for your coding agent extensions with a built i. Built with FastAPI, React.
  • dagu: Self-hostable workflow orchestrator for teams whose main work isn't orchestratio. Built with React.
  • pipeshub-ai: The open-source context layer for AI agents. PipesHub turns your company's knowl. Built with Next.js, React, FastAPI, Express.
  • harnessrouter: HarnessRouter Community Edition: the self-hosted, Apache-2.0 edition of the unif. Built with FastAPI, Next.js, React.
  • Omnara: The open-source managed agent platform. A self-hostable alternative to Claude Ma. Built with React.
  • SnapOtter: Open-source, self-hosted file-processing tool. Convert, compress, OCR, transcrib. Built with Fastify, React.
  • open-wearables: Self-hosted platform to unify wearable health data through one AI-ready API.. Built with FastAPI.
  • brightbean-studio: Open-source, self-hostable social media management platform. Schedule, publish, . Built with Django.
  • Django-CRM: BottleCRM: free, open-source (MIT) CRM with sales, support tickets and invoicing. Built with Django.
  • c15t: Open-source cookie consent manager and GDPR cookie banner for React, Next.js, Vu. Built with React, Next.js, Vue, Svelte.
  • paca: AI-native, free, open-source alternative to Jira, Trello, ClickUp & Monday. Buil. Built with React.
  • borg-ui: Replace complex Borg Backup terminal commands with a beautiful web UI. Create, s. Built with FastAPI, React.
  • ovis: Ovis (formerly herdr web UI): free, open-source browser and phone client for her. Built with React.
  • mailcheap: Newsletters where you pay for the emails you send, not for dormant subscribers, . Built with Next.js, React.
  • talorys: Your personal AI agent in your own Cloudflare account. Chat, memory, tasks, note. Built with React.
  • commonly: Open-source room for humans + cross-vendor AI agents. Every agent gets its own n. Built with Express, React.
  • zealot: Self-hosted Beta App Distribution for Android, iOS, macOS, Linux and Windows app. Built with Ruby on Rails.
  • tapflow: Self-hosted iOS & Android simulator streaming for the whole team. Built with React.
  • distr: The Open Source control plane for self-hosted, BYOC, and on-prem deployments. Ev. Built with Angular.
  • HistoryHub: HistoryHub：个人多平台历史记录中心，Chrome 扩展连接本地或自托管后端，支持网页历史与 B 站观看记录。. Built with FastAPI, Vue.
  • peekaping: Best Uptime Kuma Alternative. Built with Express, React.
  • VoidAccess: Self-hosted dark web OSINT platform. Automated threat intelligence from query to. Built with FastAPI, Next.js, React.
  • Snitch: Real-time network monitor + outbound firewall — see & block every connection. Pr. Built with FastAPI, React.
  • OnKey: Learn to sing the songs you love. A free, open-source singing trainer for Mac th. Built with Next.js, React.
  • Argus- open source security platform to protect against agentic attacks: Open-source agentic security operations platform:. Built with FastAPI.
  • Enzyme: Local-first compile step for knowledge bases. Save 350x cost, 1000x speed vs. fr. Built with React.

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  • Vercel
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  • Stripe
  • Clerk
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  • Neon
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  • PostHog

317 services listed across 36 categories. 70 priced in full, plan by plan.

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