Sill vs Profound 2026
Head-to-head comparison of two AI visibility platforms. Profound (GenAI marketing intelligence platform) 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 | Profound | |
|---|---|---|
| Focus | AI visibility simulator with counterfactual analysis, daily SOV tracking across 6 platforms, GEO recommendations | GenAI marketing intelligence with Prompt Volumes (AI search demand data), visibility tracking across 10+ platforms, content generation via Actions and Agents |
| Founded | 2024 | 2024 |
| HQ | United States | San Francisco |
| Funding | Bootstrapped | $155M total (Seed through Series C; Lightspeed, Sequoia, Kleiner Perkins) |
| Customers | 139+ brands across 86 industries | 700+ enterprise customers, 10% of Fortune 500 |
At a glance
| Sill | Profound | |
|---|---|---|
| Starting price | $0/mo (free tier) | $99/mo (ChatGPT only, 50 prompts) |
| Mid-tier price | $90/mo (120 prompts, 6 platforms) | $399/mo (100 prompts, 3 platforms) |
| AI platforms included | 6 in all plans (ChatGPT, Gemini, AI Overviews, Perplexity, Claude, Grok) | 1 (Starter), 3 (Growth), 10+ (Enterprise) |
| Prompt volume at mid-tier | 120 | 100 |
| Free tier | Yes (5 prompts, 6 platforms) | No |
| GEO recommendations | Yes (748 generated across 62 brands) | Content briefs via Actions (Growth+) |
| Counterfactual simulation | In development | No |
| Prompt Volumes (demand data) | No | Yes (unique feature, Growth+) |
| Enterprise compliance | Roadmap | SOC 2 Type II, HIPAA, SSO |
| G2 reviews | Early stage | 140+ reviews, G2 Winter 2026 Leader |
Feature comparison
| Feature | Sill | Profound |
|---|---|---|
| SOV tracking | Daily across 6 platforms, all tiers | Daily across 1-10+ platforms depending on tier |
| Competitor benchmarking | Yes, all tiers | Yes, all tiers |
| Platform divergence analysis | Yes (55% of brands differ by 10+ points) | Not a named feature |
| GEO recommendations | Actionable on-site fixes (87% on-site) | Content briefs via Actions |
| Content generation | No | Yes, via Agents (auto-drafts articles, landing pages) |
| Prompt Volumes | No | Yes, proprietary panel data from hundreds of millions of prompts |
| AI agent/crawler analytics | No | Yes, Agent Analytics |
| Revenue attribution | No | Yes, via Partnerize partnership |
| Source citation tracking | Yes | Yes, with citation shift analysis |
| Multi-language support | Limited | Not a primary feature |
| Automated workflows | No | Yes, Workflows (public beta) |
| API access | Roadmap | Enterprise only |
Pricing comparison
| Tier | Sill | Profound |
|---|---|---|
| Entry tier | Free: $0/mo, 5 prompts, 6 platforms | Starter: $99/mo, 50 prompts, ChatGPT only |
| Mid tier | Basic: $90/mo, 120 prompts, 6 platforms | Growth: $399/mo, 100 prompts, 3 platforms |
| Upper tier | Pro: $225/mo, 360 prompts, 6 platforms | Enterprise: $2,000-5,000+/mo, custom, 10+ platforms |
| Annual discount | 20% (Basic: $72/mo, Pro: $180/mo) | Not publicly listed |
| Per-prompt cost at mid tier | ~$0.75/prompt | ~$3.99/prompt |
| Additional platform fees | None, all 6 included | Enterprise-only for Claude, Grok, Meta AI, DeepSeek |
Which platform fits your team
Choose Sill if you:
- +Want to start tracking for free before committing budget
- +Need all major AI platforms monitored without per-platform add-on fees
- +Want actionable GEO recommendations, not just visibility dashboards
- +Are mid-market ($1M-$50M revenue) and cannot justify $2K+/mo for meaningful multi-platform coverage
- +Want diagnostic insights into why your SOV looks the way it does, not just what it looks like
- +Value per-prompt cost efficiency ($0.75 vs $3.99 at comparable tiers)
Choose Profound if you:
- +Need Prompt Volumes data (what real users are asking AI platforms) for content strategy
- +Are a Fortune 500 company with a dedicated analytics team and $2K+/mo budget
- +Require SOC 2 Type II, HIPAA compliance, or SSO today
- +Want AI-generated content briefs and automated article drafting
- +Need revenue attribution connected to AI visibility (Partnerize integration)
- +Prioritize the deepest possible dataset and are willing to pay enterprise pricing for it
Verdict
Profound is the market leader in AI visibility monitoring with the deepest dataset, the most enterprise customers, and a unique Prompt Volumes feature that no competitor has replicated. It is built for and priced for large organizations with dedicated analytics teams. Sill is built for mid-market teams that need actionable diagnostic insights rather than observation-only dashboards, with all 6 major AI platforms included at every tier and a per-prompt cost that is 5x lower at comparable plan levels. The deciding factor for most teams is budget and what they need beyond monitoring: Profound offers the most data, Sill offers the most direct path from data to action.
See how AI search engines see your brand
Sill tracks AI Share of Voice daily across ChatGPT, Gemini, Google AI Overviews, Perplexity, and Claude. Start with 5 prompts free.
Get Your Report
Request your first analysis today to see where you stand.