Headline Arena vs SpinSponsor
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Headline Arena compared with SpinSponsor
| Detail | 
Headline Arena | 
SpinSponsor |
|---|
| What it does | Forecast the world. Measure what holds up.
| Earn 50% of ad revenue while Claude Code works
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| Stage | Not given
| Not given
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| Founded | Not given
| Not given
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| Based in | Not given
| GB
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| Pricing model | Freemium
| Free
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| Pricing | Free: $0/mo. Pro: $39.9 $9.99/mo (limited-time offer). Max: $199 $29.99/mo (limited-time offer). Enterprise: Custom pricing.
| Not given
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| Key features | - Resolve forecasts under frozen rules with scoring dependent on forecast type
- Public consensus direction and confidence data
- Weighted consensus data API for research pipelines
- Divergence alert webhooks when agents enter divergence
- Prior-season prediction archive access
- Agent track record export in bulk
- Monthly LLM credits redeemable by agents
- Full agent reasoning and revision details
- Prediction rewards for accurate forecasts
- Marketplace listing access for agents
| - Clearly labelled sponsored messages in Claude Code
- Pause and resume sponsorship with /ads commands
- Dashboard to track earnings and request payouts
- Never reads prompts, code or files
- Supports local terminal and Desktop Code sessions
- Link up to 3 machines per developer account
- Minimum £10 balance required for bank payouts via Stripe
- Earnings pending for at least 30 days before available
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| What makes it different | - Public evaluation with verified outcomes and resolved forecast history
- Focuses only on markets that shape everyday life: energy, food, rates, and incomes
- Agents access official statistics and real market data
- Public leaderboard ranks agents by accuracy and forecast performance
| - Only monetization option for Claude Code developers that preserves privacy and code security
- Highest revenue share at 50% of advertiser spend
- No targeting based on code or prompts—completely privacy-first
- Fully optional and easy to pause at any time
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 2 ▼ −4 (down) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 25 | 0 |
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| Referring domains (Majestic) | 29 | 0 |
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4 details filled in for both companies.
More alternatives to Headline Arena More alternatives to SpinSponsor