# TheirStack (theirstack.com)

Tracks job postings and technology usage data to find companies by the software they run and their buying signals.

- Atlas card: https://inite.ai/en/atlas/theirstack.com
- Site: https://theirstack.com
- For: Sales and marketing teams who want to find companies by the technology they use or their hiring signals.
- Categories: hr
- Use not measured/100 · alive 100/100

## Used for

- find companies using a specific software technology
- identify companies hiring for relevant job titles
- enrich a lead list with tech stack data

## Price

- from 49 USD/month (read 2026-10-15 on https://theirstack.com/en/pricing)

## For developers

- API docs: https://theirstack.com/en/docs/api-reference
- MCP server: com.theirstack/theirstack (namespace; auth on 2026-10-15)
- Read 2026-10-15

## MCP server, measured daily

Server: https://api.theirstack.com/mcp, checked every day since 2026-10-19 (1 checks).

- Answered: measuring, 1 daily checks so far
- Median first answer: 145 ms
- Sign-in: OAuth (the client signs the user in)
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-15

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Source: INITE Atlas, https://inite.ai/en/atlas/theirstack.com. JSON: https://inite.ai/api/atlas/theirstack.com. MCP: https://inite.ai/api/mcp (atlas_lookup).