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Guides
Adding a technology or job filter to your company search
How to backfill a job board with TheirStack
How to fetch jobs periodically using the Jobs API
How to Automate Your Ad Chase as a Recruiting Agency
How to Avoid Downloading the Same Companies Twice
How to Build a Targeted Lead List Using Technographic Data
How to Check if a Technology or Keyword Is Available
How to Choose the Best Way to Access TheirStack Data
How to create a niche job newsletter with TheirStack MCP
How to Discover Any Company's Tech Stack
How to Enrich a Company List with Technographic Data
How to Exclude Specific Companies from a Search
How to Find Companies by Technology Stack
Find hidden candidates with niche technology experience
How to find old job postings
How to Find Promoted Jobs
How to Find Reposted Jobs
Identifying companies with problems your software solves
Monitor buying intent on a target account list
How to Monitor Competitor Hiring
How to monitor job postings automatically
Monitor tech stack changes on a target account list
Outreach companies actively hiring
How to Scrape Job Data for a List of Company Domains
How to Search Job Postings Across 328,000+ Sources
How to send a slack message for every new job found
Spotting your competitors' next moves
How to Target Companies by the Technology They Use
How Marketing Teams Can Use Hiring Data to Improve Targeting and Find Better Leads
Use job data for investment research
How to Build LinkedIn Audiences from Hiring Intent
How to Build LinkedIn Audiences from Technographics Data
Monitoring open jobs from current and past customers
Integration guide for sales intelligence software

How to Discover Any Company's Tech Stack

Step-by-step guide to finding what technologies any company uses — from backend infrastructure to internal tools — using TheirStack's job-posting-based technographic data.

You've got a target company and you want to know what technologies they use — their databases, cloud infrastructure, internal tools, DevOps stack, everything. Common reasons to look up a company's tech stack:

  • Sales preparation — Research a prospect's stack before a call so you can tailor your pitch to tools they already use.
  • Competitive intelligence — See what technologies a competitor relies on, from backend infrastructure to DevOps tooling.
  • Partner evaluation — Check whether a potential partner's stack is compatible with yours before investing in the relationship.

Most tech stack lookup tools only scan a company's website, so they only detect front-end technologies like analytics scripts, marketing pixels, and JavaScript frameworks. The backend — where the real technology decisions happen — stays invisible.

Job postings change that. When a company hires a "Senior Engineer with Snowflake and Kubernetes experience," they've just told you two technologies in their stack that no website crawler would ever find. TheirStack analyzes millions of job postings to build technology profiles for 12M+ companies, covering 32k+ technologies.

Look up a company in the app

The fastest way to check a single company's tech stack.

Open the search bar

Click on "Search companies..." in the sidebar, or press ⌘ K (Mac) / Ctrl K (Windows).

Search bar in TheirStack

Search by company name or domain

Type the company name or domain. The dropdown shows matching results with logo, domain, industry, employee count, number of jobs, and number of technologies detected.

Search results for Stripe

Browse the Technologies tab

Click a company to open its profile. The header shows firmographic data at a glance: industry, location, employees, revenue, funding, founded year, and funding stage.

The Technologies tab lists every technology detected for the company. For each technology you can see:

  • Confidence level (High / Medium / Low) — based on how often it appears relative to other technologies in the same category
  • Number of job postings where the technology was mentioned — click to view the actual jobs
  • Date range — when the technology was first and last detected in their job postings
  • Category — what type of technology it is (e.g., "Big Data as a Service", "Languages", "Containers")

Company profile showing technologies

Filter and search: Use the search box to filter by technology name. Use the Technology Category dropdown to see only technologies from a specific category — for example, filtering by "Big Data as a Service" might show that BigQuery was mentioned 35 times (HIGH confidence) while Snowflake only 5 times (LOW confidence).

Export and API: Click Export to download the full technology list as CSV or Excel. Click API to see the equivalent cURL command and JSON response — useful for building programmatic integrations.

Star your favourite technologies

Click the star icon next to any technology to add it to your favourites. Starred technologies are pinned to a "Starred" section at the top of the list, so you always see the signals that matter most without scrolling.

Favourites are saved to your account and appear first everywhere technologies are shown:

  • Company profiles — when you open a company directly
  • Company search modals — when you click a company in company search results
  • Job search modals — when you click a company name in job search results

Star the technologies your product integrates with, the tools your clients hire for, or your competitors — and you'll spot relevant companies faster across every workflow.

Access via the API

This data is also available programmatically. Click the API button in the company profile to see the equivalent cURL command and JSON response.

API button in company profile

curl -X POST "https://api.theirstack.com/v1/companies/technologies" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "company_domain": "stripe.com"
  }'

Each lookup consumes 3 API credits per company, regardless of the number of technologies returned. See the full Technographics API reference for all parameters and response fields.

Add to list: Click Add to list in the top-right corner to save the company to a company list for tracking and organization.

What you'll find — and why job postings reveal more

TheirStack detects technologies across categories that website crawlers simply cannot reach:

  • Backend and databases: PostgreSQL, MongoDB, Snowflake, BigQuery, Redis, Elasticsearch
  • DevOps and infrastructure: Kubernetes, Terraform, Docker, AWS/GCP/Azure services, CI/CD tools
  • Data engineering: Spark, Airflow, Kafka, dbt, Fivetran
  • Internal tools: Salesforce, Workday, ServiceNow, Jira, Confluence
  • Security: Okta, CrowdStrike, Splunk, HashiCorp Vault
  • Frontend and mobile: React, Angular, Swift, Kotlin (also detectable, but less unique to job-posting data)

Further reading

Company Lookup

Look up any company by name or domain to see their full technology stack, buying intent topics, job postings, and firmographic data.

How to Build a Targeted Lead List Using Technographic Data

Step-by-step guide to building targeted sales lead lists by filtering companies based on their tech stack using TheirStack's [[total_technologies]]+ technology database.

How to Find Companies by Technology Stack

Step-by-step guide to finding companies that use specific technologies. Build targeted lead lists by filtering companies based on their tech stack, combined with firmographic data like size, industry, and funding.

Technographic Data

Discover TheirStack's comprehensive technographic database with [[total_technologies]] technologies mapped across [[total_companies]] companies worldwide. Access real-time tech stack insights derived from millions of job postings with confidence scoring and complete data transparency.

How we source tech stack data

Discover how TheirStack extracts tech stack data from millions of job postings worldwide using confidence scoring to identify company technologies.

Technographics

This endpoint lists the technologies used by a company. For each technology, it returns the confidence level (`low`, `medium`, `high`), the number of jobs that mention the technology, and the first and last dates it was mentioned.

TheirStack vs BuiltWith

Compare TheirStack and BuiltWith to find the best technographic database for your needs. Learn how TheirStack offers broader technology coverage, real-time webhooks, and confidence scoring, while BuiltWith specializes in web technology tracking.

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How to create a niche job newsletter with TheirStack MCP

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How to Enrich a Company List with Technographic Data

Step-by-step guide to enriching your company lists with technographic data on TheirStack — from manual CSV uploads to automated API integration for CRM and sales workflows.

On this page

Look up a company in the appWhat you'll find — and why job postings reveal moreFurther reading