monitoring

Sponsored Newsletter Finder

Discover newsletters in a target niche relevant to your ICP, evaluate audience fit, estimate reach and CPM, and output a ranked shortlist of sponsorship opportunities. Uses web search to find newsletters, then scores each against ICP alignment criteria. Use when a marketing team wants to reach an existing engaged audience for less than the cost of building their own, or when testing a new channel before committing.

Gooseby Athina AI
Run in Gooseworks
Install
Terminal
npx gooseworks install --claude

# Then in your agent:
/gooseworks <prompt> --skill sponsored-newsletter-finder
About This Skill

Sponsored Newsletter Finder

Find newsletters your ICP reads, evaluate their audience fit, and produce a ranked shortlist ready for outreach. Cheaper and faster than building your own list from scratch — newsletters already have the trust and the audience.

Best for: Seed/Series A teams with $500-5,000/month to test a paid distribution channel. Not for companies without budget or companies targeting a mass-market ICP.

When to Use

  • "Find newsletters I can sponsor to reach [ICP]"
  • "What newsletters does my target audience read?"
  • "I want to test newsletter sponsorship — where should I start?"
  • "Give me a ranked list of newsletters for [industry/role]"

Phase 0: Intake

  1. ICP definition — Target title, industry, company stage (e.g., "VP of Sales at Series A-C B2B SaaS companies")
  2. Monthly budget — Rough range for sponsorships (e.g., "$1,000-3,000/month")
  3. Geography — US only, global, or specific region?
  4. Campaign goal — Awareness (brand mention) or direct response (signup/demo)?
  5. Any newsletters you're already subscribed to or know about in this space? (Seeds the search)

Phase 1: Discovery via Web Search

Search for newsletters using multiple angles:

Search Queries to Run

"[ICP industry] newsletter" sponsorship
"[ICP role] newsletter" site:substack.com OR site:beehiiv.com
"best newsletters for [ICP role/industry]"
"[ICP industry] newsletter" "advertise" OR "sponsor"
"[competitor company] newsletter sponsorship" (find where competitors are already advertising)
newsletter directory "[ICP industry]"

Also search curated newsletter directories:

  • newsletter.directory for category browsing
  • paved.com for sponsorship marketplace listings
  • swapstack.co for newsletter ad network
  • sparkloop.co for referral partnerships

Collect: newsletter name, URL, estimated subscribers, topics covered, sponsorship page URL if found.

Phase 2: Evaluate Each Newsletter

For each discovered newsletter, score across 5 dimensions (1-5 each):

Scoring Criteria

Dimension135
Audience matchUnrelated audiencePartial overlapDirect ICP match
Reach<1,000 subscribers5,000-20,00020,000+
EngagementNo open rate data~30-40% open rate40%+ open rate
Niche specificityGeneric business newsletterIndustry newsletterRole-specific newsletter
Sponsor accessibilityNo sponsor info foundInquiry requiredClear pricing / marketplace listing

Total score: /25. Shortlist newsletters scoring ≥ 15.

Data Points to Find for Each Newsletter

Search for:

  • Subscriber count (often on the "About" or "Advertise" page)
  • Open rate (sometimes disclosed, often ~40-50% for niche newsletters)
  • CPM or flat sponsorship rate
  • Audience demographics (if disclosed)
  • Past sponsors (who's already buying? = validation)
  • Send frequency (weekly, daily, etc.)

For newsletters with no pricing page, estimate CPM from industry benchmarks:

  • Micro (<5k subs): $50-150 flat rate
  • Small (5k-20k subs): $100-500 flat rate
  • Mid (20k-50k subs): $500-2,000 flat rate
  • Large (50k+ subs): $1,000-10,000 flat rate

Phase 3: Competitive Intelligence

Check if known competitors are sponsoring newsletters in this space:

Search: "[competitor name]" "sponsored by" newsletter
Search: "[competitor name]" advertisement site:substack.com

If a competitor is sponsoring a newsletter, it's validated audience fit — flag it as high priority.

Phase 4: Output Format

# Newsletter Sponsorship Shortlist — [DATE]
ICP: [description] | Budget: [range] | Goal: [awareness/direct response]
 
---
 
## Tier 1 — High Priority (Score 20-25)
 
### 1. [Newsletter Name]
- **URL:** [url]
- **Subscribers:** [N] (~[source])
- **Open rate:** [X%] (disclosed/estimated)
- **Audience:** [description]
- **Send frequency:** [weekly/daily/etc]
- **Sponsorship type:** [dedicated / classified / banner mention]
- **Estimated cost:** $[X] per send
- **Estimated CPM:** $[X]
- **Past sponsors:** [list — competitive validation]
- **Score:** [X/25]
- **Fit rationale:** [1-2 sentences on why this is a strong match]
- **Sponsor page:** [url or "inquiry required"]
 
### 2. [Newsletter Name]
...
 
---
 
## Tier 2 — Worth Testing (Score 15-19)
 
### 1. [Newsletter Name]
...
 
---
 
## Tier 3 — Watchlist (Score 10-14)
(Monitor these — audience fit is good but reach or accessibility is limited)
 
---
 
## Where Competitors Are Already Advertising
 
| Newsletter | Competitor | Notes |
|-----------|-----------|-------|
| [Name] | [Competitor] | Validated ICP match |
...
 
---
 
## Budget Allocation Recommendation
 
Given budget of [X]/month and campaign goal of [goal]:
 
| Newsletter | Send frequency | Cost per send | Sends/month | Monthly cost |
|-----------|---------------|--------------|-------------|-------------|
| [Name] | Weekly | $[X] | 4 | $[X] |
| [Name] | Bi-weekly | $[X] | 2 | $[X] |
| **Total** | | | | $[X] |
 
**Recommended test:** Start with [Newsletter 1] for 2 sends to validate conversion rate before expanding.
 
---
 
## Outreach Templates
 
### Cold outreach to newsletter with no sponsor page:
 
Subject: Sponsoring [Newsletter Name] — [Your Company]
 
> Hi [Name],
>
> I'm [Name] from [Company] — we [one-line pitch]. We're fans of [Newsletter Name] and think our audience overlap is strong: [ICP match rationale].
>
> Would you be open to a sponsored mention or dedicated send? Happy to share what we're looking for and see if it's a fit.
>
> [Name]
 
### Request for media kit:
 
> Hi [Name] — big fan of [Newsletter Name]. Could you share your media kit and current sponsorship rates? [Your Company] is evaluating newsletter partnerships for Q[X].

Save to clients/<client-name>/intelligence/newsletter-sponsors-[YYYY-MM-DD].md.

Cost

ComponentCost
Web search (discovery phase)Free
All analysis and scoringFree (LLM reasoning)
TotalFree

Tools Required

  • web_search — for newsletter discovery and verification
  • No API keys required

Trigger Phrases

  • "Find newsletters I can sponsor to reach [ICP]"
  • "What newsletters does [title/industry] read?"
  • "Run newsletter sponsorship research for [client]"
  • "I want to test paid newsletter distribution — where should I start?"

What's included

·
"Find newsletters I can sponsor to reach [ICP]"
·
"What newsletters does my target audience read?"
·
"I want to test newsletter sponsorship — where should I start?"
·
"Give me a ranked list of newsletters for [industry/role]"
·
newsletter.directory for category browsing

Newsletter

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