Sill vs Bluefish 2026
Head-to-head comparison of two AI visibility platforms. Bluefish (AI marketing platform for enterprise brand perception) versus Sill (AI visibility simulator with counterfactual analysis and daily SOV tracking across 6 platforms). Here is what each platform does, where each is stronger, and which one fits your team.
Company overview
| Sill | Bluefish | |
|---|---|---|
| Focus | AI visibility simulator with counterfactual analysis, daily SOV tracking across 6 platforms, GEO recommendations | Enterprise AI marketing platform focused on brand perception, source influence diagnostics, and AI advertising for Fortune 500 brands |
| Founded | 2024 | 2024 |
| HQ | United States | New York |
| Funding | Bootstrapped | $24M total (NEA, Salesforce Ventures, Crane Venture Partners) |
| Customers | 139+ brands across 86 industries | Fortune 500 focus (80% of customers). Named: Adidas, Tishman Speyer, Omnicom |
At a glance
| Sill | Bluefish | |
|---|---|---|
| Starting price | $0/mo (free tier) | Quote-based (estimated $10K+/yr) |
| AI platforms tracked | 6 in all plans | 5 (ChatGPT, Gemini, Perplexity, AI Mode, AI Overviews) |
| Free tier | Yes (5 prompts) | No |
| Self-serve signup | Yes | No (sales-led, closed pilot) |
| Source influence diagnostics | Citation tracking | Yes (reveals which sources shape AI narratives about your brand) |
| GEO recommendations | Yes (748 across 62 brands) | Optimization measurement (ROI of optimization efforts) |
| AI advertising | No | Yes (emerging capability) |
| Sentiment analysis | Yes | Yes (safety, accuracy, favorability scoring) |
| Target market | Mid-market brands | Fortune 500, CPG, financial services, automotive |
| Founding team | -- | PromoteIQ (acquired by Microsoft) + LiveRail (acquired by Facebook) founders |
Feature comparison
| Feature | Sill | Bluefish |
|---|---|---|
| SOV tracking | Daily across 6 platforms | Visibility monitoring across 5 platforms |
| GEO recommendations | Actionable on-site fixes (87% on-site) | Optimization measurement and ROI tracking |
| Source influence analysis | Citation tracking | Deep source diagnostics (brand-owned vs third-party source attribution) |
| Competitive intelligence | Yes, all tiers | Yes, side-by-side views across identical prompts |
| Brand perception scoring | SOV score | Sentiment, safety, accuracy, favorability multi-dimensional scoring |
| AI advertising | No | Yes (targeted AI ad campaigns) |
| Counterfactual simulation | In development | No |
| Platform divergence analysis | Yes (55% of brands differ 10+ points) | Not a named feature |
| Research/reports | Benchmark data (139 brands, 86 industries) | Proprietary reports (Holiday AI Commerce Report, Super Bowl analysis) |
| Self-serve access | Yes | No (closed pilot, sales-led) |
Pricing comparison
| Tier | Sill | Bluefish |
|---|---|---|
| Entry | Free: $0/mo, 5 prompts, 6 platforms | Quote-based, estimated $99-299/mo (limited) |
| Mid | Basic: $90/mo, 120 prompts, 6 platforms | Quote-based, estimated $299-799/mo |
| Enterprise | Pro: $225/mo, 360 prompts | Custom enterprise pricing (primary tier) |
| Contract | Monthly billing, cancel anytime | Enterprise contracts (likely annual) |
| Transparency | Public pricing page | No public pricing |
| Access | Self-serve, instant | Sales conversation required, closed pilot reported |
Which platform fits your team
Choose Sill if you:
- +Want transparent, public pricing and self-serve signup
- +Are a mid-market brand that does not need Fortune 500 brand perception infrastructure
- +Need actionable GEO recommendations, not just brand perception scoring
- +Want to start free and evaluate with real data before budget conversations
- +Need 6 AI platforms tracked without enterprise pricing
- +Prefer a focused AI visibility tool over a broader AI marketing platform
Choose Bluefish if you:
- +Are a Fortune 500 brand managing complex brand narratives across AI platforms
- +Need deep source influence diagnostics (which specific sources are shaping how AI perceives your brand)
- +Want AI advertising capabilities alongside visibility monitoring
- +Need multi-dimensional brand perception scoring (safety, accuracy, favorability)
- +Have an enterprise budget and prefer a sales-led relationship with dedicated support
- +The founding team's track record (PromoteIQ/Microsoft, LiveRail/Facebook exits) matters for enterprise procurement
Verdict
Bluefish and Sill serve different market segments with minimal overlap. Bluefish is built for Fortune 500 brands that need deep brand perception analytics, source influence diagnostics, and emerging AI advertising capabilities. Its founding team (two successful exits to Microsoft and Facebook) and investor base (NEA, Salesforce Ventures) position it squarely for enterprise procurement. Sill is built for mid-market teams that need actionable AI visibility monitoring with transparent pricing and self-serve access. The source influence diagnostics that Bluefish offers are genuinely unique in the market and valuable for brands managing complex narratives. The GEO recommendations and counterfactual simulation approach that Sill offers are valuable for teams that need to act on visibility data, not just observe it. Most teams will self-select quickly: if you need a sales conversation to learn the price, Bluefish is targeting a different buyer than Sill.
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