/ writing / sales

What stack are they running? What are they hiring for?

2026-07-28 · cynix · 4 min read

You're evaluating a competitor, a prospect, or an acquisition target. You need to know: what's their tech stack? What engineers are they hiring? What does that tell you about their architecture, scaling challenges, and strategic direction?

You could manually check BuiltWith, Wappalyzer, their careers page, LinkedIn job posts... or you could run Company Tech Stack & Hiring Intelligence once and get structured intelligence.

Three modes

Mode	Input	Output
`techStack`	Company domains/URLs	200+ technologies detected from HTML, headers, JS bundles, DNS, SSL certs. Categories: frontend, backend, cloud, database, analytics, marketing, payment, security, devops, AI/ML, CDN, monitoring, testing, mobile, CRM.
`hiringSignals`	Company domains/URLs	Job postings from career pages + ATS boards (Greenhouse, Lever, Ashby, Workable, etc.) with extracted tech requirements, hiring velocity, role seniority.
`competitorLandscape`	Industry + stage filters	Discovers companies from YC, BuiltIn, WelcomeToTheJungle, etc., then runs techStack + hiringSignals on each.

Technology detection (200+ signatures)

Each detection includes category, confidence score (0-1), and evidence (HTML pattern, header, DNS record, JS import). Categories:

Frontend: React, Next.js, Vue, Nuxt, Svelte, Astro, Remix, Gatsby, Angular, Alpine, HTMX, Livewire
Backend: Node.js, Python, Go, Ruby, PHP, Java, Elixir, Rust, .NET — plus frameworks (Express, Fastify, NestJS, Django, Flask, FastAPI, Rails, Spring, Laravel, Phoenix, Actix, Gin)
Cloud: AWS, GCP, Azure, Vercel, Netlify, Cloudflare, DigitalOcean, Heroku, Railway, Render, Fly.io
Databases: PostgreSQL, MySQL, MongoDB, Redis, Elasticsearch, DynamoDB, Cassandra, CockroachDB, TimescaleDB, PlanetScale, Supabase, Neon, Firebase
Analytics: GA4, GTM, Segment, Mixpanel, Amplitude, Heap, Hotjar, FullStory, PostHog, Plausible, Matomo
Marketing/CRM: HubSpot, Intercom, Drift, Zendesk, Salesforce, Marketo, Pardot, Braze, Customer.io
Payments: Stripe, PayPal, Braintree, Adyen, Square
Security: Sentry, Datadog, New Relic, LogRocket, Bugsnag, Rollbar, Honeybadger, reCAPTCHA, hCaptcha, Cloudflare WAF, Auth0, Clerk, Firebase Auth, NextAuth, Lucia
DevOps: Docker, Kubernetes, Terraform, Ansible, GitHub Actions, GitLab CI, CircleCI, Jenkins, ArgoCD, Flux, Helm, Prometheus, Grafana
AI/ML: OpenAI, Anthropic, LangChain, LlamaIndex, Hugging Face, Pinecone, Weaviate, Qdrant, Milvus, W&B
CDN/Edge: Cloudflare, CloudFront, Fastly, Akamai, Bunny.net, KeyCDN
Monitoring: Sentry, Datadog, New Relic, Honeycomb, Grafana Cloud, PagerDuty, Opsgenie
Testing: Jest, Vitest, Cypress, Playwright, Puppeteer, Testing Library, Storybook
Mobile: React Native, Flutter, Swift, Kotlin, Expo, Capacitor, Ionic

Input

{
  "mode": "techStack",
  "companies": ["stripe.com", "vercel.com", "linear.app"],
  "techCategories": ["frontend", "backend", "cloud", "analytics", "devops", "payment", "security"],
  "includeHiringData": true,
  "jobSources": ["career-page", "greenhouse", "lever", "ashby"],
  "deepScan": true,
  "includeConfidence": true
}

Output (per technology, outputFormat: "technology")

{
  "mode": "techStack",
  "company": "Stripe",
  "domain": "stripe.com",
  "technology": "React",
  "category": "frontend",
  "confidence": 0.95,
  "evidence": ["HTML: __REACT_DEVTOOLS_GLOBAL_HOOK__", "HTML: react.production.min.js"],
  "version": "18.2.0",
  "firstDetected": "2024-01-15",
  "lastDetected": "2026-07-28",
  "fetchedAt": "2026-07-28T10:00:00Z"
}

Hiring intelligence (outputFormat: "job")

{
  "mode": "hiringSignals",
  "company": "Vercel",
  "jobTitle": "Senior Software Engineer, Platform",
  "jobUrl": "https://vercel.com/careers/eng-123",
  "jobDescription": "Build the next generation of Vercel's deployment platform...",
  "techRequirements": ["TypeScript", "Go", "Rust", "Kubernetes", "gRPC", "PostgreSQL", "Redis", "GraphQL"],
  "hiringVelocity": 3.2,
  "fetchedAt": "2026-07-28T10:00:00Z"
}

What the signals tell you

Signal	Implies
React + Next.js + Vercel	Modern frontend, edge-first, serverless functions
Go + Rust + Kubernetes + gRPC	High-throughput backend, microservices, performance-critical
Hiring: React, TypeScript, GraphQL	Frontend-heavy product, likely building complex UIs
Hiring: Rust, distributed systems, eBPF	Infrastructure/tooling company, systems-level work
Stripe + Vercel + Segment + PostHog	PLG SaaS, product analytics, self-serve billing
Salesforce + Marketo + HubSpot + Outreach	Enterprise sales motion, heavy outbound
Sentry + Datadog + PagerDuty + Honeycomb	Mature observability, on-call culture
Cloudflare Workers + D1 + R2 + D1	Edge-native, serverless-first architecture

Use cases

Competitive intelligence — "What stack is Linear using? What are they hiring for?" → techStack + hiringSignals.
Sales targeting — "Find all fintechs using Plaid + AWS + hiring Go engineers" → competitorLandscape + filters.
Technical due diligence — acquisition target stack audit, hiring velocity as growth proxy.
Recruiting — "Which companies use our stack and are hiring?" → reverse lookup.
Market mapping — "All AI companies in Series A using Python + PyTorch + Kubernetes" → competitorLandscape.

Why not BuiltWith / Wappalyzer?

No rate limits — runs on your Apify schedule, unlimited.
Hiring data included — job postings with extracted tech requirements, not just static detection.
Confidence scores — evidence-based, not binary yes/no.
Extensible — add custom signatures in the code, re-deploy.
Webhook ready — push changes to Slack, pipeline, CRM.

Try it: Company Tech Stack & Hiring Intelligence on Apify — 200+ tech signatures, job extraction, competitor discovery.