Each AI platform has different sources it trusts. Show up where your target LLM is looking.
Here's something that surprised us on the show: OpenAI pays Reddit for a firehose of all their data. Reddit is a massive input to ChatGPT answers. If you don't have a presence on Reddit, you're functionally invisible in ChatGPT for a lot of queries.
HubSpot runs their own subreddit. They actively encourage customers to share experiences there. They participate in relevant industry subreddits. This isn't some abstract brand-building play—it directly feeds into how ChatGPT recommends them.
Where does each platform pull from?
Different platforms trust different sources:
- ChatGPT (OpenAI) — Reddit, web content, review sites, affiliate sites. Reddit is the big one here because of OpenAI's paid data partnership.
- Grok (xAI) — X/Twitter data. Grok has exclusive access to the full Twitter firehose, so your X presence directly feeds into Grok answers.
- Gemini (Google) — Google's web index and YouTube. If you're making video content, this is where it matters most.
- Perplexity — Broad web crawl, academic sources. The most platform-agnostic of the bunch.
- Claude (Anthropic) — Web content. Less Reddit-dependent than ChatGPT.
Why did Tenex score so differently across platforms?
This is why your AEO Grader scores might look wildly different across platforms. When we ran Tenex, we scored well on Perplexity but weak on OpenAI—because our entire presence was on X and LinkedIn (walled gardens) with nothing on Reddit. Meanwhile, we were getting a surprising amount of traffic from Grok precisely because of our X presence.
Kipp also flagged something most people miss: review sites, ranking sites, and affiliate sites have a real correlation with AEO performance. There's "some science there" between paid placements on those sites and how you show up in AI answers. It's not the whole picture, but it's a factor worth knowing about.
Pro Tip: Start with the platform where your target customers actually are. If your buyers live in ChatGPT, Reddit is your first priority. If they're power users on X asking Grok, that's a different play entirely.
Checkpoint: You know which AI platforms matter most for your audience, and you have a plan for the top source each one pulls from.