# ChatGPT vs Perplexity: Which AI Search Engine Should You Optimize For?

> Source: Show Up On AI · https://showuponai.com/compare/chatgpt-vs-perplexity
> Updated: April 2026

ChatGPT and Perplexity are the two most-discussed AI search engines, but they work very differently under the hood. The right GEO tactics for each are not the same.

## At-a-glance comparison

| Dimension | ChatGPT | Perplexity |
|---|---|---|
| Monthly users | 883 million | 45 million |
| Underlying search index | Bing | Custom real-time crawl + multiple sources |
| Top-cited single source | Bing top results (~87%) | Reddit (~6.6%) |
| Crawler user-agents | GPTBot, OAI-SearchBot, ChatGPT-User | PerplexityBot, Perplexity-User |
| Freshness handling | Mixed parametric + live search | Real-time crawl, strong recency bias |
| Best for | Enterprise/general consumer queries | Research, comparison, recent events |
| Optimizing for it means | Strong Bing SEO + entity authority | Fresh content, Reddit presence, ranking lists |

## How to optimize for ChatGPT

ChatGPT Search piggybacks on Bing. Verify your site in Bing Webmaster Tools, submit your sitemap, and prioritize Bing-specific signals (clean schema, fast pages, declarative content). Allow GPTBot for training-data inclusion and OAI-SearchBot for live search visibility. Build entity authority through reviews, niche directories, and trade publication mentions.

## How to optimize for Perplexity

Perplexity's bias toward freshness and editorial recommendation lists changes the playbook. Allow PerplexityBot in robots.txt. Update content frequently. Get into independent ranking-style lists. Engage authentically in relevant Reddit communities — Perplexity's single largest citation source.

## Should you optimize for both?

Yes. The base layer (clean technical SEO, schema, citation-worthy content, entity authority) is identical. The platform-specific differences are additive, not contradictory.

## Related

- AI Search Platforms: https://showuponai.com/guide/ai-search-platforms
- GEO Checklist: https://showuponai.com/geo-checklist
- Backlinks for GEO: https://showuponai.com/guide/backlinks-for-geo