Tech Stack Qualifier

Tech Stack Qualifier is a Claude skill that checks one company against a technology rule. You say which tools it must run and which rule it out. It answers Qualified, Partial, Disqualified or Not enough data.

What it does

You give Claude a domain and a rule, for example "acme.com must run HubSpot and must not run Salesforce". The skill reads the technologies LeadOcean detected on the company's website and compares them to your rule.

It then sizes the market that runs the same stack, which is free, and lists the buyers at the account. The reply is a fixed shape, so you can paste it into a note or a CRM field.

Technologies come from the company's own site. Only crawled companies have them, about 7.8M of the 63M in the database. If a company has none on file, the skill says "Not enough data" and stops before it spends a buyer record.

How it works

The skill is a SKILL.md file. It tells Claude which tools to call and in what order.

1. list_enum_values with name: "tech_category" resolves a category such as CRM to its exact string. Free. Runs only if you give a category.
2. count_leads sizes the mailable buyers at companies that run your must-have technologies. Free.
3. count_leads with the domain sizes the buyers at this one account. Free.
4. get_company returns the technologies list, industry, headcount and HQ. 1 record.
5. Claude marks each technology Found, Missing, Clear or Present and picks the verdict. No tool call.
6. search_leads lists up to 3 buyers at the domain by default, only for Qualified or Partial. 1 record per person returned.

A run on a company with no technologies on file stops after step 4.

How to use it

1. Download the zip: Download tech-stack-qualifier.zip.
2. Unzip it and add the tech-stack-qualifier folder as a skill in Claude.
3. Connect LeadOcean at https://api.leadocean.io/mcp and sign in.
4. Ask: "Does acme.com run HubSpot and not Salesforce?" Add a buyer function if you want one: "Show me the Sales leaders."

You need a LeadOcean account. The free plan gives you 1,000 records, one-off, no card.

Sample output

The free sizing step works for any technology. We ran count_leads and list_enum_values on 1 October 2026.

The count covers mailable people only: verified, catch_all_valid and catch_all. The category count comes from the 7 September 2026 crawl, so treat it as a snapshot.

The verdict needs get_company and search_leads, which spend records, so no real company run is pasted here. This is the shape of the reply, with placeholder values.

Output format (placeholder values)

Tech stack check: Acme (acme.com)
As of 1 October 2026

Verdict: Qualified

## Stack
| Technology | Rule | Result |
| HubSpot | must have | Found |
| Salesforce | must not have | Clear |

Other technologies seen on site: Cloudflare, Google Analytics, Stripe

## Company
- Industry: Software | Size: 201-500 employees | HQ: US

## Market
- Mailable C-Team and VP (Sales & Business Development) at companies running HubSpot: 69,495
- Mailable buyers at this account: 40

## Buyers to start with
| Name | Title | Level | Function | LinkedIn |
| Jane Doe | VP Sales | VP | Sales & Business Development | https://www.linkedin.com/in/janedoe |

Records spent: 4

The skill replies in this shape and nothing else. The title line is a Markdown H1 and each section title is an H2. Any field it cannot find reads "not on file".

Records per run

The free plan's 1,000 records cover 250 default runs. On Pro ($499 a month) there is no per-record price. Fair use applies, as described on the pricing page.

Related skills

• ICP Qualifier: check a company against industry, size, country, funding and tech together.
• Account Researcher: the buying committee and work emails for one domain.
• Lookalike Companies: companies that resemble a seed account.
• All Claude skills

Background reading: the best tech stack lookup tools, the free tech stack checker and the company tech stack enrichment.

FAQ