Scenario
You’re building Extruct (company intelligence API) and you’ve closed 23 deals over the past 6 months. You want to analyze what these customers have in common and find more companies like them.Starting Prompt
won_deals.csv):
I’ve analyzed your 23 won deals. Here are the patterns I see:
Industry clusters:
- Sales/Marketing tech: 7 companies (30%)
- Fintech/Risk: 5 companies (22%)
- B2B Marketplaces: 4 companies (17%)
- Property/Real Estate tech: 3 companies (13%)
- Other: 4 companies (18%)
- 20-100 employees: 13 companies (57%)
- 100-300 employees: 8 companies (35%)
- 300+: 2 companies (8%)
- Enrichment/scoring workflows: 14 companies (61%)
- Search/discovery features: 7 companies (30%)
- Risk/compliance: 5 companies (22%)
- Matching/recommendation: 4 companies (17%)
- Larger companies (100+) → higher ACV ($4.8K avg)
- Enrichment use cases → higher usage volume
- What’s your core value proposition?
- Who sends these emails (name/role)?
- Preferred tone for outreach?
Based on the use_case field in your CSV, I see 4 core hypotheses:
#1 B2B Scoring Workflows
Companies building features that score, evaluate, or rank other businesses (vendors, partners, leads, tenants). They need structured company data but don’t want to build scrapers. Best fit: Sales tools, procurement platforms, marketplace platforms, property tech Search angle: “B2B scoring software”, “vendor evaluation platforms”, “lead scoring tools” #2 Enrichment at Scale
Sales and marketing tools that enrich inbound leads or CRM records with company data. High volume, need API reliability. Best fit: Sales intelligence, marketing automation, CRM enrichment Search angle: “lead enrichment software”, “CRM data enrichment”, “B2B data providers” #3 Risk & Compliance Screening
Fintech and financial services platforms screening counterparties, assessing credit risk, or verifying business legitimacy. Best fit: Fintech, lending platforms, payment processors, compliance tools Search angle: “business credit risk software”, “KYB verification platforms”, “financial risk assessment tools” #4 Discovery & Matching
Platforms that help users discover or match with relevant companies (investor-startup, buyer-supplier, job seeker-employer). Best fit: Marketplaces, VC platforms, recruiting tech, partner networks Search angle: “B2B marketplace platforms”, “company discovery tools”, “partner matching software” Sound right? Any to refine?
Companies building features that score, evaluate, or rank other businesses (vendors, partners, leads, tenants). They need structured company data but don’t want to build scrapers. Best fit: Sales tools, procurement platforms, marketplace platforms, property tech Search angle: “B2B scoring software”, “vendor evaluation platforms”, “lead scoring tools” #2 Enrichment at Scale
Sales and marketing tools that enrich inbound leads or CRM records with company data. High volume, need API reliability. Best fit: Sales intelligence, marketing automation, CRM enrichment Search angle: “lead enrichment software”, “CRM data enrichment”, “B2B data providers” #3 Risk & Compliance Screening
Fintech and financial services platforms screening counterparties, assessing credit risk, or verifying business legitimacy. Best fit: Fintech, lending platforms, payment processors, compliance tools Search angle: “business credit risk software”, “KYB verification platforms”, “financial risk assessment tools” #4 Discovery & Matching
Platforms that help users discover or match with relevant companies (investor-startup, buyer-supplier, job seeker-employer). Best fit: Marketplaces, VC platforms, recruiting tech, partner networks Search angle: “B2B marketplace platforms”, “company discovery tools”, “partner matching software” Sound right? Any to refine?
I’ll run lookalike searches from your top 5 customers (by deal size and recency),
then combine with semantic search for broader coverage.
# Seed 1: LeadEnrich (sales intelligence)
curl -X GET "https://api.extruct.ai/v1/companies/leadenrich.com/similar?limit=100"
# Seed 2: MarketCompass (market research)
curl -X GET "https://api.extruct.ai/v1/companies/marketcompass.com/similar?limit=100"
# Seed 3: PartnerMatch (marketplace)
curl -X GET "https://api.extruct.ai/v1/companies/partnermatch.io/similar?limit=100"
# Seed 4: RiskView (fintech risk)
curl -X GET "https://api.extruct.ai/v1/companies/riskview.io/similar?limit=100"
# Seed 5: SupplierIQ (procurement)
curl -X GET "https://api.extruct.ai/v1/companies/supplieriq.io/similar?limit=100"
# Query 1: B2B scoring/evaluation
curl -X GET "https://api.extruct.ai/v1/companies/search" \
-d '{
"q": "B2B software that scores, evaluates, or ranks companies for vendor assessment, lead qualification, or risk screening",
"filters": {"include": {"employee_count": ["11-50", "51-200", "201-500"]}},
"limit": 150
}'
# Query 2: Sales/marketing enrichment
curl -X GET "https://api.extruct.ai/v1/companies/search" \
-d '{
"q": "sales intelligence and lead enrichment platforms that provide company data for B2B outreach",
"limit": 150
}'
# Query 3: Marketplace/matching platforms
curl -X GET "https://api.extruct.ai/v1/companies/search" \
-d '{
"q": "B2B marketplace or matching platforms connecting buyers and sellers or partners",
"limit": 100
}'
I’ll design columns to identify which of your 4 hypotheses each company matches:
Column 1: B2B Scoring Feature
Type: select
Options: Yes - core feature, Yes - secondary, No, Unclear
Prompt: Does offer features for scoring, evaluating, or ranking companies (vendors, leads, partners, etc.)? Column 2: Use Case Category
Type: multiselect
Options: Lead enrichment, Vendor evaluation, Risk screening, Partner matching, Market research, Other
Prompt: Which use cases does serve based on their product description? Column 3: Data Integration Signals
Type: grade (1-5)
Prompt: How API/data integration-forward is ? Look for: API docs, data partnerships, integration pages, mentions of third-party data. Column 4: Target Customer Segment
Type: text
Prompt: Who are ‘s primary customers? (e.g., sales teams, procurement departments, fintech companies, etc.) Column 5: Recent Funding or Product News
Type: text
Prompt: Find recent funding announcements, product launches, or expansion news for from the last 12 months. These columns let us match companies to hypotheses and find personalization hooks. Approve?
Type: select
Options: Yes - core feature, Yes - secondary, No, Unclear
Prompt: Does offer features for scoring, evaluating, or ranking companies (vendors, leads, partners, etc.)? Column 2: Use Case Category
Type: multiselect
Options: Lead enrichment, Vendor evaluation, Risk screening, Partner matching, Market research, Other
Prompt: Which use cases does serve based on their product description? Column 3: Data Integration Signals
Type: grade (1-5)
Prompt: How API/data integration-forward is ? Look for: API docs, data partnerships, integration pages, mentions of third-party data. Column 4: Target Customer Segment
Type: text
Prompt: Who are ‘s primary customers? (e.g., sales teams, procurement departments, fintech companies, etc.) Column 5: Recent Funding or Product News
Type: text
Prompt: Find recent funding announcements, product launches, or expansion news for from the last 12 months. These columns let us match companies to hypotheses and find personalization hooks. Approve?
curl -X POST "https://api.extruct.ai/v1/tables/tbl_win_case_lookalike/columns" \
-d '{...5 column configs...}'
curl -X POST "https://api.extruct.ai/v1/tables/tbl_win_case_lookalike/run"
Enriching 682 companies × 5 columns = 3,410 cells
Estimated time: 18-22 minutes [Progress bar…] Enrichment complete ✓
Estimated time: 18-22 minutes [Progress bar…] Enrichment complete ✓
## Win Case Lookalike Campaign - Segmented
### By Hypothesis:
- #1 B2B Scoring: 247 companies (36.2%)
- #2 Enrichment at Scale: 189 companies (27.7%)
- #3 Risk & Compliance: 98 companies (14.4%)
- #4 Discovery & Matching: 86 companies (12.6%)
- Multi-hypothesis: 42 companies (6.2%)
- Unmatched: 20 companies (2.9%)
### Tier 1 — 68 companies (10.0%)
Strong hypothesis match + API-forward (grade 4-5) + recent news/hook
| Company | Domain | Hypothesis | Hook Signal |
|---------|--------|------------|-------------|
| VendorScore | vendorscore.io | #1 B2B Scoring | Raised Series A ($8M) 2 months ago for "vendor intelligence" |
| ProspectIQ | prospectiq.com | #2 Enrichment | Blog: "Why we're moving from Clearbit to..." |
| FraudGuard | fraudguard.ai | #3 Risk & Compliance | Launched "Business Verification API" last quarter |
### Tier 2 — 436 companies (63.9%)
Medium fit, standard templated outreach
### Tier 3 — 178 companies (26.1%)
Low data quality or weak hypothesis fit, hold
Since you have 4 distinct hypotheses with different value props, I’ll create
4 email prompt templates — one per hypothesis. Each will have:
- Hypothesis-specific P1 openers
- Tailored example queries
- Relevant social proof from your win cases
claude-code-gtm/prompts/win-case-lookalike/
├── h1_b2b_scoring_template.md
├── h2_enrichment_scale_template.md
├── h3_risk_compliance_template.md
└── h4_discovery_matching_template.md
# Email Prompt: Hypothesis #1 - B2B Scoring Workflows
## P1 Opener
If {{b2b_scoring_feature}} = "Yes - core feature":
"I saw [Company] offers [specific feature] for scoring/evaluating companies.
We've worked with similar platforms on the data layer for these workflows."
If {{recent_funding_news}} mentions scoring/evaluation:
"I saw [Company] recently [funding/product news]. We've helped similar
platforms add company intelligence to their scoring features."
## P2 Example Query
"Find B2B software vendors in supply chain with 50-200 employees,
founded after 2018, with recent funding"
## P3 Social Proof
Choose based on {{use_case_category}}:
- If Vendor evaluation → "A procurement platform uses this to auto-score supplier stability."
- If Lead scoring → "A sales intelligence tool uses this to qualify enterprise leads."
- If Partner matching → "A marketplace platform uses this to verify partner companies."
## P4 Proof Point
"PS. The API is free for search (unlimited). Enrichment starts at $59/mo for 1K credits."
...
Claude uses email-generation to generate emails, routing to the appropriate prompt template based on hypothesis.
for each company in segmented_list:
if tier == 1 or tier == 2:
template = load_template_for_hypothesis(company.hypothesis_number)
email = generate(template, company.enrichment_data)
save_to_csv(email)
Subject: Company intelligence for vendor scoring
Hi [First Name],
I saw VendorScore raised $8M for vendor intelligence features. We've worked
with procurement platforms on the company data layer for similar workflows.
Extruct is an API for company search and intelligence. Example query for
vendor scoring:
"Find logistics software vendors in North America with 50-200 employees,
founded after 2018, with recent funding rounds"
A procurement automation platform uses this to auto-score supplier stability
before manual due diligence.
Worth exploring?
Danny
Extruct
PS. API is free for search (unlimited). Enrichment starts at $59/mo for 1K credits.
claude-code-gtm/csv/output/win-case-lookalike/
├── emails_h1.csv (247 emails for Hypothesis #1)
├── emails_h2.csv (189 emails for Hypothesis #2)
├── emails_h3.csv (98 emails for Hypothesis #3)
└── emails_h4.csv (86 emails for Hypothesis #4)
# Campaign 1: Hypothesis #1 - B2B Scoring
curl -X POST "https://api.instantly.ai/api/v1/campaign/create" \
-d '{
"name": "Win Case Lookalike - B2B Scoring",
"from_email": "[email protected]"
}'
# Upload leads for Campaign 1
for each lead in emails_h1.csv:
curl -X POST "https://api.instantly.ai/api/v1/lead/add" ...
# Repeat for Campaigns 2-4
Final Artifacts
Campaign Results (4 weeks)
| Hypothesis | Sent | Replies | Reply Rate | Positive | Demos |
|---|---|---|---|---|---|
| #1 B2B Scoring | 186 | 27 | 14.5% | 12 | 5 |
| #2 Enrichment | 143 | 19 | 13.3% | 8 | 3 |
| #3 Risk & Compliance | 76 | 8 | 10.5% | 3 | 1 |
| #4 Discovery | 99 | 6 | 6.1% | 2 | 0 |
| Total | 504 | 60 | 11.9% | 25 | 9 |
- Hypothesis #1 (B2B Scoring) was strongest: 14.5% reply rate, 48% of positive replies
- Company size matters: 100-200 employee companies had 2x reply rate vs 20-50
- “API-forward” enrichment was predictive: Grade 4-5 companies replied at 16.2% vs 7.8% for grade 2-3
- Recent funding = strong hook: 19 of 25 positive replies were from companies with funding/product news in last 6 months
Next Steps
- Update context file with campaign results (use context-building feedback loop mode)
- Promote Hypothesis #1 to “Validated” status
- Run follow-up campaign focused on H1 with 2x list size
- Add “API integration readiness” as enrichment column for future campaigns (strong signal)