Stripe
Spotify
Klarna is replacing its CRM now · 2h agoCompetitor displacement
Siemens has the base your product builds on · 5h agoPrerequisite technology
Walmart already buys in your category · 6h agoCategory adoption
Amazon is investing in the tool right now · 3h agoTech plus use case
Lovable has no tool for this yet · 5h agoStack gap
Why it works
Your product is easier to adopt when it plugs into a tool the company already runs: there is less to set up, and the team that owns that tool can judge your product quickly. It also gives your outreach a concrete opening, the tool they use every day.
How to act on it
Lead with "works with your stack" and route to the relevant integration proof point.
Integration fit: integrations with AI assistants, automations and CRMs
TheirStack works with the AI assistants, automation tools and CRMs you already use: ask Claude or ChatGPT through the MCP server, send new matches to Clay, n8n, Make or Zapier by webhook, and create leads in Salesforce or HubSpot.
AI assistants
Ask Claude, ChatGPT, Cursor or any MCP client to search jobs, companies and tech stacks through the TheirStack MCP server.
MCP server
https://api.theirstack.com/mcpAutomations
TheirStack sends every new matching company by webhook as soon as it finds it, to your automation platform or through it into your CRM and sales tools.
CRMs and sales tools
Run this signal from your own code
curl -X POST https://api.theirstack.com/v1/companies/search \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "company_technology_slug_and": ["snowflake","dbt"] }'
Claude
ChatGPT
Cursor
VS Code
Windsurf
Cline
OpenCode
Gemini
Hermes
OpenClaw
Clay
n8n
Make
Zapier
Databar
Salesforce
HubSpot
Attio
Pipedrive
Apollo
Instantly
ContactOutUse cases
- Outbound
Find companies that use the technology you work with
Find the companies running the platform you implement, integrate with or staff for, scoped to your market and company size.
See the use case →
Related signals
Competitor displacement
Companies already using a competing product, which means the category is validated and budget may already exist.
Example3 new job posts ask for HubSpot experience
They run a competitor today
Prerequisite technology
Companies using an underlying technology that often creates demand for your product.
ExampleKubernetes appears in 6 engineering roles
Observability tooling usually follows
Tech plus use case
Companies running a technology and hiring for the workflow it supports.
ExampleRuns Salesforce and posts 2 Salesforce Administrator roles
The tool is tied to an active project
Learn how
- Guide
How to Target Companies by the Technology They Use
Learn three proven strategies for targeting companies based on their tech stack — must-have technologies, competitor customers, and partner integrations — to build high-fit prospect lists.
They already run a tool you plug into.
Find the companies using the tools you integrate with, and open with how you fit their stack.
Start free: 200+ free credits.