---
title: TheirStack vs ThomsonData
description: Compare TheirStack and ThomsonData for technology intelligence. While ThomsonData sells static B2B data lists, TheirStack provides real-time technographic data and job intelligence via a self-serve API. See which approach fits your needs.
url: https://theirstack.com/en/comparisons/theirstack-vs-thomsondata
---

ThomsonData and TheirStack both help you find companies using specific technologies — but they take fundamentally different approaches. ThomsonData sells pre-built static data lists. TheirStack provides a real-time API and platform for live technology and [job data](/en/docs/data/job) intelligence.

## Quick Decision Guide

#### Choose TheirStack if

-   ✓You need real-time, continuously updated data — not a static snapshot
-   ✓You want an API for programmatic access with 40+ filters and webhooks
-   ✓You want one-time purchases available — buy credits once without any subscription or recurring commitment
-   ✓You need to trace technology signals back to their source for verification
-   ✓You want job data and hiring intent signals alongside technographic data
-   ✓You need transparent methodology — know exactly how technologies are detected
-   ✓You want self-serve access with a free tier to evaluate data quality first

#### Choose ThomsonData if

-   ✓You need pre-packaged contact data (email, phone) alongside company data in a single list
-   ✓You prefer browsing a catalog of pre-segmented lists rather than running custom queries

## Feature comparison

### Access & Data Model

| Feature | TheirStack | ThomsonData |
| --- | --- | --- |
| Data access | ✓Real-time API + UI | Static list purchase |
| Pricing | ✓Free tier + plans from $59/mo, one-time purchases available | Quote-based (per list) |
| Data freshness | ✓Updated every few minutes | Unknown update frequency |
| Free tier / trial | ✓Yes — 50 company credits/month | No |

### Data & Capabilities

| Feature | TheirStack | ThomsonData |
| --- | --- | --- |
| Jobs API | ✓Yes — real-time, 40+ filters | No |
| Technology detection | ✓Job posting analysis (transparent) | Methodology not documented |
| Contact data | Via integrations (Apollo, ContactOut, LinkedIn) | Included in lists (email, phone) |
| Hiring intent signals | ✓Yes — from job postings | No |
| Custom filtering | ✓40+ filters with regex support | Pre-segmented lists only |

### Integration & Developer Experience

| Feature | TheirStack | ThomsonData |
| --- | --- | --- |
| API | ✓Yes — sub-second response | No API |
| Webhooks | ✓Yes — real-time notifications | No |
| Documentation | ✓Public, comprehensive | Not available |
| Job deduplication | ✓Yes — built-in | N/A |

## What is ThomsonData?

ThomsonData is a B2B data provider that sells pre-built email lists and contact databases segmented by technology usage, industry, job title, and geography. If you want a list of "companies using Salesforce" with decision-maker contact details, ThomsonData provides that as a static, one-time purchase.

TheirStack is fundamentally different — it's a real-time data platform. Instead of buying a static list, you query a live database of millions of job postings and companies through an API or web interface, with data updated every few minutes.

### Static lists vs. real-time intelligence

This is the core difference between ThomsonData and TheirStack:

**ThomsonData** sells a snapshot — a list that was accurate at some point in the past but begins decaying the moment you receive it. Contacts leave companies, technologies change, and companies grow or shrink. There's no way to refresh this data without purchasing a new list.

**TheirStack** provides living data. Every time you make an API call, you get the latest information. Set up [webhooks](/en/docs/webhooks) to be notified instantly when a company starts hiring for a technology you care about. The data never goes stale because it's continuously updated from 336k [job sources](/en/docs/data/job/sources).

TheirStack also offers a free tier with 50 [company credits](/en/docs/pricing/credits)/month. And if you only need data once, TheirStack offers **one-time credit purchases** — no subscription required. You buy a credit pack, use it within 12 months, and you're done. This gives you the same flexibility as a static list purchase, but with real-time data and full API access.

### Data transparency and methodology

ThomsonData does not publicly document how it determines which companies use which technologies, how frequently data is updated, or what accuracy metrics it achieves.

TheirStack's methodology is fully transparent: we analyze job postings. When a company mentions PostgreSQL in a job listing, we capture that signal with a [confidence score](/en/docs/data/technographic/how-we-source-tech-stack-data). You can click through to the actual job posting to verify any technology signal.

### Filtering and customization

ThomsonData provides pre-segmented lists — you choose from available segments but can't run custom queries with complex filter logic.

TheirStack offers 40+ filters that you can combine freely:

-   **Company filters:** Industry, size, country, revenue, funding, URL, LinkedIn slug, etc.
-   **Job filters:** Title, description, country, city, remote options, salary, etc.
-   **Regex support** on title, description, and location fields for precise matching

### Job data and hiring signals

ThomsonData does not provide job data. TheirStack gives you real-time access to job postings from 336k sources with built-in deduplication, webhooks, and historical data back to 2019. Hiring data provides a powerful intent signal — [companies actively hiring](/en/job-lookup) for a technology are actively investing in it.

### UI and contact data integrations

-   Beyond the API, TheirStack provides a rich UI where you can run company and job searches and quickly [find people](/en/docs/app/contact-data/find-people) contacts from selected companies.
-   We integrate with leading [contact data](/en/docs/app/contact-data) providers (Apollo, ContactOut) and LinkedIn (Free, Recruiter, Sales Navigator) to streamline outreach from search results.

### When to choose each

Choose **ThomsonData** if you need a quick, one-time email list for a specific campaign and don't need ongoing data access or real-time updates.

Choose **TheirStack** if you need real-time technology intelligence, job data, hiring intent signals, and a programmable API for continuous prospecting and monitoring.