A startup called Profound just raised $96 million at a billion-dollar valuation. They’re 18 months old. Their product? Tracking whether AI chatbots mention your brand when people ask questions.
That’s the state of things. A company that didn’t exist in 2024 is now worth ten figures because Google, ChatGPT, and Perplexity changed how people find information. And most brands haven’t caught up.
SEO vs AEO: Different Games
SEO is about ranking. You optimize a page, build backlinks, hit position one, get clicks. You know the drill.
AEO — Answer Engine Optimization — is about getting cited. When someone asks ChatGPT “what’s the best project management tool for remote teams,” does your brand show up in the answer? That’s AEO.
The difference matters because AI answers don’t work like search results. Here’s the data point that should worry you: fewer than 10% of sources cited in ChatGPT, Gemini, and Copilot responses actually rank in Google’s top 10 for the same query. You can dominate Google and be invisible to AI.
The rules are different too. SEO rewards backlinks, keyword density, and domain authority. AEO rewards clarity, structured data, and being the kind of source an LLM can actually parse and trust. The ideal AEO-optimized answer is 30-60 words: direct enough for AI to extract, detailed enough to cite.
The Numbers Behind the Shift
The scale of AI search is hard to ignore:
- ChatGPT: 810 million monthly active users, 5.6 billion visits/month, 2.5 billion daily prompts
- Perplexity: 33 million monthly active users, 780 million queries in 2025, 66% year-over-year growth
- Google AI Overviews: Appearing on up to 25% of queries at peak, now settled around 16%
- Gemini: 346 million monthly active users, referral traffic up 388% year-over-year
And then there’s zero-click searches. 58.5% of U.S. Google searches now end without a click to any website. On mobile, that number hits 77%. By the end of 2025, estimates put zero-click at over 70% of all searches.
When an AI Overview appears on a search page, organic click-through rates drop 62.5%. From 1.6% average to 0.6%. Paid search takes a similar hit: 13% CTR drops to 6%.
Real publishers are feeling this. The Planet D, a travel blog running since 2008, lost half its traffic after AI Overviews launched and eventually shut down. Charleston Crafted saw a 70% traffic decline in two months. Stereogum lost 70% of ad revenue in 2025.
The Billion-Dollar Startup: Profound
Profound is the company that made AEO a category. Founded in mid-2024, they hit a $1B+ valuation by February 2026 across three rounds:
- June 2025: $20M Series A led by Kleiner Perkins
- August 2025: $35M Series B led by Sequoia Capital
- February 2026: $96M Series C led by Lightspeed, with Sequoia and Kleiner Perkins following
Total raised: $155 million. 700+ enterprise customers. Roughly 10% of the Fortune 500, including Target, Walmart, Ramp, MongoDB, U.S. Bank, and Figma.
What Profound actually does: it sends thousands of structured prompts to major AI assistants every day, tracks how they respond, and tells you where your brand shows up (and where it doesn’t). Their data shows that up to 90% of sources cited in AI answers change over time, and different models use almost entirely different source sets. You can’t optimize once and walk away.
They also launched Profound Agents, which help brands generate content aligned with how AI systems parse and cite information. Moving from measurement to action.
The Competitors
Profound isn’t alone.
Peec AI (Berlin) hit $4M ARR in 10 months with 1,300 companies on the platform. They raised $21M in November 2025 at a $100M+ valuation. Their approach: prompt-based tracking instead of keyword-based. You define prompts that mirror real user queries, and Peec runs them across AI engines to show who gets cited and how often. They call the metric “Share of AI Voice.” Pricing starts at $87/mo.
Otterly.AI has 20,000+ marketing professionals using its platform. Recognized by G2, OMR, and Gartner. They track brand mentions across Google AI Overviews, ChatGPT, Gemini, Copilot, and Perplexity. Starts at $29/mo, which makes it the most accessible entry point.
Semrush added an AI Visibility Toolkit to their existing SEO suite. If you already pay for Semrush, this is the easiest path to start tracking AI mentions without adding another tool. Semrush is in our directory.
The GEO (Generative Engine Optimization) software market is projected to hit $1.089 billion in 2026 and grow at 40.6% CAGR to $17.1 billion by 2034. The U.S. market alone: $365 million in 2026.
What Changes for Marketers
If you’re running content marketing or SEO today, here’s what AEO means for you:
Structure content for extraction. AI needs clear, concise answers. Front-load direct responses. Use atomic paragraphs that stand on their own. Think FAQ-style formatting: question as header, 30-60 word answer immediately below.
Schema markup matters more. Structured data helps AI systems understand what your content is about, who wrote it, and whether it’s trustworthy. If you’re not using schema, you’re invisible to half the discovery layer.
Track your AI visibility. You probably track Google rankings. Start tracking whether ChatGPT, Perplexity, and Gemini mention your brand. Clearscope and Surfer SEO both added AI visibility tracking. Dedicated tools like Otterly.AI and Peec AI go deeper.
AI traffic converts differently. Early data shows AI-sourced traffic converts at roughly 2x the rate of traditional organic, with one-third the sessions needed to convert. Users who arrive from an AI citation are further along in their buying process. They already got the context. They’re ready to act.
Don’t abandon SEO. AEO doesn’t replace SEO. Google still sends the most traffic. AI Overviews still link back to sources. The brands that win will do both: rank in Google and get cited in AI. Think of it as two visibility layers, not a choice between them.
The Takeaway
A year ago, “answer engine optimization” wasn’t a phrase anyone used. Now there’s a billion-dollar company built on it, a $17B projected market, and Fortune 500 brands scrambling to figure out whether ChatGPT knows they exist.
The shift isn’t coming. It’s here. If your content strategy stops at Google rankings, you’re optimizing for half the picture. The other half is whether AI can find you, understand you, and recommend you.
Start with the basics: structure your content for extraction, add schema markup, and track your mentions across AI platforms. The tools exist. The data is there. The question is whether you move now or wait until your competitors have already locked in their share of AI voice.