Free Developer Tool

Company Tech Stack Lookup

Enter any GitHub organization name to explore their public repos, top programming languages, stars, and forks. Free, no signup required.

Uses GitHub's public API. 60 requests/hour per IP. Uses 2 API calls per lookup.

This tool uses GitHub's public API (60 requests/hour, 2 per lookup). For continuous monitoring of who's evaluating repos in your category, try LeadCognition.

How to Research a Company's Tech Stack

Understanding a prospect company's tech stack is foundational for developer-led sales. It lets you personalize outreach, identify capability gaps, and qualify whether your product is a natural fit. Here are the key research methods:

GitHub Org Exploration (this tool)

Look up their GitHub organization to see top repos, primary languages, and framework choices. Works for companies with public GitHub presence.

BuiltWith / Wappalyzer

Detect frontend frameworks, analytics tools, and CDN usage from their website. Good for marketing tech stack but limited for backend choices.

LinkedIn Job Postings

Engineering job descriptions reveal required tech stack. "Experience with PostgreSQL and Redis" tells you exactly what infrastructure they run — invaluable for database or caching tool sales.

GitHub Signal Monitoring

LeadCognition monitors GitHub events (stars, forks, PRs, issues) on repos in your category — the most reliable signal that a company is actively evaluating a technology.

Why Tech Stack Matters for Developer-Led Sales

For DevTool companies, tech stack is a qualification criterion as important as company size or industry. Here's why it drives conversion rates:

1

Stack compatibility = product fit

If a company uses Python and you sell a Python SDK, they're already qualified. If they use Java only and your product is Node.js-first, they're not — saving you both time. Tech stack signals let you prioritize accounts before spending credits on enrichment.

2

Personalization multiplies reply rates

Referencing a specific repo or language in your outreach signals genuine research. "I noticed your team built most of your backend in Go — our SDK has native goroutine support" dramatically outperforms generic cold email. Developer signal intelligence makes this personalization scalable.

3

Competitive displacement intelligence

If a company's repos show they're using a specific competitor tool (as a dependency or in README mentions), that's your opening. You know they're already paying for a solution in your category — they're buyable, just need a reason to switch.

4

Timing: catching evaluations in progress

When a developer forks a repo in your category or opens issues on a competitor tool, they're actively evaluating. LeadCognition surfaces these real-time signals so you can reach out while the evaluation is happening — not three months later.

Use this tool in your sales workflow

  1. 1. Look up a prospect's GitHub org here to understand their stack
  2. 2. Use GitHub Email Finder to look up their key developers
  3. 3. Check their Developer Signal Scores to prioritize who to contact
  4. 4. Set up LeadCognition to monitor their GitHub activity for real-time buying signals

Frequently Asked Questions

How do I find a company's tech stack from GitHub?
Enter the company's GitHub organization name in the tool above. It fetches their public org profile and top 10 repositories by stars, showing the primary programming language for each repo and aggregating them into a language breakdown. Most tech companies — DevTool, SaaS, software — have active GitHub organizations that reveal their core technology choices.
Why does tech stack matter for B2B sales?
A company's tech stack is one of the strongest indicators of what tools they're likely evaluating next. If a company's top repos are TypeScript-heavy, they're more likely to adopt TypeScript-native infrastructure tools. Stack knowledge enables personalized outreach that references their actual technology — dramatically improving reply rates compared to generic cold email.
What GitHub organizations can I look up?
Any GitHub organization with public repositories. Most technology companies have an official GitHub org — for example, facebook, google, vercel, stripe, supabase, prisma, openai. Consumer brands and non-tech companies may have private or no GitHub orgs. Try the company name, their product name, or search GitHub directly to find their organization handle.
Why does the language breakdown only show one language per repo?
GitHub's repository list API returns the primary language per repo — the language with the most code. A repo using TypeScript for the app and Go for tooling shows as TypeScript. This is a GitHub API limitation. For deeper analysis, LeadCognition cross-references tech stack signals with developer enrichment data for richer context.
Can I monitor when companies add new repos or switch tech stacks?
This tool provides a point-in-time snapshot. For continuous monitoring — tracking when a company forks your competitor's repo, opens issues on tools in your category, or hires developers who match your ICP — LeadCognition monitors GitHub events in real time and alerts you to high-intent signals.
How does this help with developer-led sales?
Understanding a company's tech stack lets you personalize outreach around their actual tools — referencing specific frameworks or identifying capability gaps your product fills. Combined with LeadCognition's GitHub signal monitoring, tech stack data enables highly targeted, contextual outreach to developers who are actively evaluating tools in your category.

Monitor Who's Evaluating Repos in Your Category

LeadCognition tracks GitHub stars, forks, and issues across your target repos — surfacing developers and companies actively evaluating tools in your space. Enriched with verified contact data and AI-personalized outreach.

Monitor Who's Evaluating These Repos — Try LeadCognition Free

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