All businesses optimize for ChatGPT and Google but only a few brands even consider Claude, Grok, and Copilot, and this makes these three worth your attention in every way possible.
They are no longer niche. Pew Research found that among US adults, Copilot reaches 17 percent, Grok 8 percent, and Claude 6 percent, and all three retrieve and cite live web content. Better still, they lean on infrastructure you can influence, so getting visible across them is largely one playbook with three add-ons rather than three separate rebuilds.
How do Claude, Grok, and Copilot compare?
All of these engines extract information available on the internet, attributing it appropriately, but they have different ways of obtaining this information. This is the aspect that your optimization process has to take into consideration.
| Engine | Owner | Where it retrieves from | Your main lever |
|---|---|---|---|
| Claude | Anthropic | Its own search crawlers plus a third-party search backend | Crawler access and authority |
| Grok | xAI | The live X post graph plus the open web | Presence on X plus strong web pages |
| Copilot | Microsoft | The Bing index plus OpenAI models | Bing indexation |
What follows will take each technique one at a time, and then share common techniques useful for all.
How to optimize for Claude
Claude has been equipped with the real-time web search capability in 2025. It became available free of cost across all packages starting in May of that year, thus ensuring a broad reach. To be recognized by Claude, you must first perform a search and then become a clearly recognizable source.
How does Claude search and cite?
Claude does not browse on every question. In normal chat it answers mostly from its trained knowledge and searches situationally, for current events, post-cutoff facts, or when you ask it to look something up. When it does search, it provides direct citations so users can fact-check the sources.
There are reports that state that the web search run by Claude employs Brave as its retrieval backend which is an important fact to know as it states that doing well in other independent indexes aside from Google increases Claude visibility. Meanwhile, Claude shows preference for pages with reliable sources, reliable information, the pages which can be directly quoted.
What are Claude's three crawlers?
Anthropic operates three different bots, with each one being operated independently by robots.txt. This accomplishment is the most significant Claude option at your disposal.
| User agent | Purpose | Blocking it means |
|---|---|---|
| ClaudeBot | Crawls content that may train Anthropic's models | Your content is kept out of training |
| Claude-User | Fetches a page when a user's question needs it | Claude cannot pull your page to answer a live question |
| Claude-SearchBot | Crawls to improve Claude's search results | You lose visibility in Claude-powered search |
In reviewing the situation, it is important to note that these are distinct instructions. Blocking ClaudeBot will not necessarily lead to the blocking of the other directives. If you aim to utilize AEO without providing it with your training data, you need to allow Claude-SearchBot and Claude-User to operate freely while deciding separately whether to block ClaudeBot.
How to optimize for Grok
Grok, the chatbot from xAI, is one that relies most heavily on recency data of the three chatbots. According to the reports by Reuters, it was found that its chatbot market share increased to a value approximating 18 percent in the US by the start of 2026, thus making it the third most popular chatbot in the nation.
How does Grok's real-time search work?
Grok has a system that uses two source methods of retrieving information from networked devices. It connects to both the latest X post graph and the internet and compiles the results. Its developers have released writing about this tool and how it works with keywords, semantic searches, and user searches to obtain threads.
For recent or opinion-driven queries, Grok leans on very fresh X posts and often quotes them directly. For factual queries, the open web carries more weight. Its DeepSearch mode goes further, running an iterative, multi-step research loop before composing a cited answer.
Why does your X presence matter, and its crawler does not?
Grok's defining trait is that X posts are a first-class source, refreshed continuously through an internal firehose rather than web crawling. So a genuine, substantive presence on X, where credible accounts engage with your content, directly feeds what Grok can surface.
There is one caution that should be clearly mentioned. xAI does not provide any formal documentation for crawlers, and the Grok user-agent strings found on other sites have not been confirmed. You will not be able to completely restrict Grok access to robots.txt, so it is very important to make your website easy to crawl by any crawlers but to concentrate on creating your good X footprint.
How to optimize for Copilot
Microsoft Copilot spans Windows, Edge, Bing, and its own app, and Microsoft reported roughly 150 million monthly active users in early 2026. For public-web visibility, Copilot is the most straightforward of the three, because it runs on one index you already know.
Why is Bing indexation the whole game?
Copilot grounds its answers in Bing's index. It can only cite what Bing has crawled, indexed, and ranks, which makes the equation simple: Bing SEO is Copilot AEO. Microsoft's own webmaster team says keeping your site crawlable, fresh, and fully indexed matters more than ever for AI answers.
Two Microsoft tools make this concrete. IndexNow lets you push new and changed URLs to Bing instantly, speeding the crawl-to-citation pipeline.
And in early 2026 Microsoft launched an AI Performance report in Bing Webmaster Tools, which shows how often Copilot cites you and the exact queries that retrieved you. It is the only first-party citation dashboard any of these three engines offers, so use it.
Consumer Copilot vs Microsoft 365 Copilot: what is the difference?
It's important to distinguish between the two types of surface. Consumer Copilot is tied to the public Bing index, and therefore all that has been said before is pertinent to it. Microsoft 365 Copilot, on the other hand, is different, since it relies on the organization's internal data that is collected by the Microsoft Graph: emails, documents, and internal files.
Public-web AEO doesn't affect answers of Microsoft 365 Copilot. The issue is that this surface is dominated by its internal content, permission, and metadata so it's important to be realistic in regard to your expectations of it.
What is the shared playbook for all three?
Most of what helps across Claude, Grok, and Copilot is the same disciplined work that helps on any AI engine. These are the moves with the broadest payoff.
The cross-engine checklist
- Get fully indexed in Bing. Submit sitemaps and use IndexNow. This powers Copilot directly and any other Bing-grounded surface.
- Allow the right AI crawlers. Permit Claude-SearchBot and Claude-User for Claude, and keep Bingbot open for Copilot. Treat training crawlers as a separate decision.
- Build a real presence on X. Post substantive content and earn engagement from credible accounts, since Grok grounds heavily on live X posts.
- Lead with the answer. Open each section with a direct answer, then support it, so all three can extract a clean, attributable passage. Our guide on structuring content that AI engines cite goes deep on this.
- Keep content fresh and dated. Update timestamps and sitemaps, since freshness governs how fast updates reach AI answers, and Grok weights recency even harder.
- Earn third-party corroboration. Mentions and citations on independent authoritative sites help every retrieval engine trust and repeat your claims.
- Rank in non-Google indexes. Optimize for Bing and independent engines like Brave, not just Google, because Copilot and Claude draw from those.
- Strengthen entity clarity. Consistent naming and schema markup for AI search help each engine resolve who you are and match you to queries.
The through-line is that these are the same fundamentals behind getting cited by ChatGPT and ranking in Perplexity. Once your content is answer-first, crawlable, fresh, and corroborated, you are competitive across the whole field, which is the core promise of answer engine optimization.
Frequently Asked Questions
Does optimizing for Bing help me appear in Copilot?
Yes, directly. Copilot grounds its answers in Bing's index and can only cite what Bing has crawled and ranked, so being fully indexed in Bing is the single biggest lever for Copilot visibility. Microsoft's own guidance ties comprehensive indexing and freshness to its AI-powered answers, which is why Bing SEO effectively is Copilot AEO.
How do I get cited by Claude?
First make sure the query triggers a search, which happens on fresh or specific questions, then be a crawlable, authoritative, directly quotable source. Allow Claude-SearchBot and Claude-User in your robots.txt so Claude can reach and index you. Since Claude's search reportedly uses Brave, ranking in independent indexes rather than only Google helps as well.
Does Grok only use Twitter and X?
No. Grok uses a dual source, searching the live X post graph and the open web in parallel. X dominates for recent and opinion-driven queries, where Grok often quotes posts directly, while websites carry more weight for factual questions. So both a genuine X presence and strong web pages matter for Grok visibility.
Which crawlers should I allow for AI visibility?
For proper visibility, you should enable Bingbot for Copilot and Claude-SearchBot, in combination with allowing Claude-User for Claude. Training crawlers like ClaudeBot are a separate, optional decision. You can't reliably gate Grok, since xAI provides no official crawler user agent, so just keep your website crawlable.
Can I block AI training but still get cited?
For Claude, yes. Since Anthropic's bots work separately from each other, it is possible to stop ClaudeBot from functioning while still keeping Claude-SearchBot and Claude-User operational. In this way, you can remain visible in Claude's citations without your own material undergoing training.
How do I measure whether these engines cite me?
Copilot is the only one with first-party measurement today, through the AI Performance report in Bing Webmaster Tools, which shows citation counts and the grounding queries that retrieved you. Claude and Grok have no citation dashboard, so most teams track brand mentions and citations across AI answers using a dedicated share-of-voice approach.
Where Unveilr fits
Claude, Grok, and Copilot are moving too quickly. Versions of models change, crawlers are named differently, and the way that Copilot cites is constantly changing in relation to Bing. Consequently, tracking visibility among these entities becomes an ongoing concern.
Essentially, what Unveilr does is that it runs a loop across every engine: it observes how every assistant responds to your key queries, finds out what is missing, modifies the crawler settings, content, and signals that enable bridging the gap, and then scans the results once more to confirm that they are effective.
A case study conducted internally has shown that a D2C brand moved from the 9th most-quoted domain to the most-quoted overall source in terms of AI responses, while ChatGPT's visibility rose from 3.3 percent to 44.7 percent.
In order to understand the complete cross-engine situation, combine this with our guide to optimizing for ChatGPT Search and Google Gemini and evaluate your positioning using measuring your AI share of voice.