When buyers ask AI what to pick, the answer is assembled from sources the engine can read. In fintech, one source towers over the rest.
These communities appeared as cited sources in our panel's answers:
| Subreddit | Appearances |
|---|---|
| r/Accounting | 1 citation in our panel |
| r/ynab | 1 citation in our panel |
| r/AusFinance | 1 citation in our panel |
| r/Ramp | 1 citation in our panel |
| r/investing | 1 citation in our panel |
We keep a curated list of these communities with self-promo rules: best subreddits for fintech audiences.
Three data points explain the mechanism. First, 40.1% of the sources large language models cite come from Reddit (Semrush, 150K citations). Second, 99% of ChatGPT's Reddit citations point to individual threads, not brand pages (Profound). Third, our own 1,000-run study found that an engine whose index cannot read Reddit cited it exactly 0 times out of 500 answers: access to threads is the whole game, and the big engines (ChatGPT, Google, Perplexity) have that access.
Beyond Reddit, the sources AI leaned on for fintech were youtube.com (53.8%), nerdwallet.com (28.2%), airwallex.com (15.4%), g2.com (15.4%), google.com (12.8%). You cannot buy placement in any of them. You can, however, be genuinely present in the threads.
AI assistants build shopping answers from the sources they can read, and Reddit is the heaviest one: 25.6% of AI answers to fintech buying prompts in our July 2026 panel cited Reddit. The practical path is to be helpfully present in the exact threads AI engines read: answer real buyer questions in the communities listed above, add value first, and mention your product once.
We ran 40 real buying prompts for the fintech category (best-of, versus, is-it-worth-it, alternatives) through Perplexity Sonar, an AI answer engine with native citations, and counted the cited sources. 39 answers returned sources. We re-run the panel monthly.
Directionally, yes. ChatGPT has a licensing deal with Reddit and third-party studies show Reddit is its most-cited domain: 40.1% of LLM citations point to Reddit according to Semrush's 150K-citation study. Our own 1,000-run study also showed an engine WITHOUT Reddit access cited it exactly zero times: access to Reddit threads is the mechanism.