Lovable
Klarna is replacing its CRM now · 2h agoCompetitor displacement
Stripe runs the stack you plug into · 4h agoIntegration fit
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
Why it works
A company that fits your profile but shows no tool in your category may still handle the work by hand or in spreadsheets. With no incumbent to replace, the conversation is about the problem instead of a switch. It works best when the company also shows the need, for example by hiring the team that would use your product.
How to act on it
Run a greenfield education play instead of a replacement play.
Stack gap: 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 '{ "min_employee_count": 100, "max_employee_count": 1000, "company_country_code_or": ["US"], "company_technology_slug_not": ["amplitude","mixpanel"] }'
Claude
ChatGPT
Cursor
VS Code
Windsurf
Cline
OpenCode
Gemini
Hermes
OpenClaw
Clay
n8n
Make
Zapier
Databar
Salesforce
HubSpot
Attio
Pipedrive
Apollo
Instantly
ContactOutUse cases
- Enrichment
Enrich a company list with technographic data
Add technology columns to the companies in your CRM or list, to segment, score and personalize outreach.
See the use case →
Related signals
Category adoption
Companies using tools in the broader category you serve.
ExampleJob posts name two different CDPs
The category is in use, no vendor has won
They fit your profile and run nothing like you.
Find the companies in your market with no tool in your category yet, and be the first one they evaluate.
Start free: 200+ free credits.
Frequently asked questions
A greenfield account is a company that fits your ideal customer profile but has no tool in your category yet, so you sell it a new solution and have nothing to replace. TheirStack finds these accounts by excluding every company whose job posts name a tool in your category.
TheirStack finds stack gaps by excluding every company that has named a tool in your category in its job posts. Add your profile filters, list the category's tools in the Technology filter with is not any of, and what remains are companies that fit and have shown no tool.
A tool missing from job posts in TheirStack often points to a real gap, though a company that isn't hiring in the area or never names its tools can still have one. Pair the gap with a sign of need, such as a new role that owns the problem. How we source tech stack data
TheirStack applies your profile filters, such as HQ Country, Employees and Industry, in the same search that excludes the tools in your category. Set Company type to direct employer as well, so recruiting agencies that mention tools for their clients don't distort the gap list. Company Search
Pitch a greenfield account on the problem first: explain what it costs them today and what solving it is worth before you talk about your product. With no incumbent to replace, migration and price comparisons carry little weight, so education and a clear first step do more work.