YouGov Survey: Claude Tops AI Satisfaction, Grok Scores Minus 4.7
YouGov's BrandIndex survey (March-July 2026, UK) ranks Claude first in AI satisfaction at 56.2. Grok scores minus 4.7 among former users. Full breakdown inside.
A YouGov BrandIndex survey covering UK users from 1 March to 31 July 2026 has ranked Claude from Anthropic as the most satisfying AI assistant with a net score of 56.2, well ahead of Gemini at 46.5 and ChatGPT at 46.0. Grok and Siri landed at the bottom of the table, and Grok's former-user score turned negative at minus 4.7. The findings suggest that raw market size and device ubiquity do not protect an AI product from poor user perception.
What happened
| AI Assistant | Net Satisfaction Score |
|---|---|
| Claude (Anthropic) | 56.2 |
| Gemini (Google) | 46.5 |
| ChatGPT (OpenAI) | 46.0 |
| Alexa (Amazon) | 42.6 |
| Copilot (Microsoft) | 37.2 |
| Grok (xAI) | Bottom of ranking |
| Siri (Apple) | Bottom of ranking |
YouGov collected responses from active UK users through its BrandIndex tracking system, which asks targeted questions about specific products and topics. The survey ran from 1 March 2026 through 31 July 2026. The net satisfaction score measures the balance of positive minus negative sentiment among people who have used each product.
Claude’s 56.2 score sits roughly ten points clear of its nearest rivals. The gap between first and third place (Claude vs ChatGPT) is wider than the gap between ChatGPT and Copilot, which speaks to how decisively Claude separated itself at the top.
Why does Grok score so badly with former users?
The survey also separated current users from former users, and the former-user data is where the story gets stark. Grok’s former-user satisfaction score landed at minus 4.7. A negative score means that people who stopped using Grok collectively report more bad experiences than good ones, a strong signal that many users tried the product and left dissatisfied.
Claude scored highest among former users too, making it the only assistant to hold the top position in both the current-user and former-user rankings, according to the YouGov report.
The report also noted the widest gaps between current and former satisfaction scores:
- ChatGPT: 63.7 points higher among current users than former users
- DeepSeek: 62.5 points higher
- Grok: 62.4 points higher
A wide gap is not automatically bad. It may simply reflect that people who keep using a product like it more than those who tried and moved on. But combined with Grok’s negative absolute score among former users, the picture is harder to explain away.
The built-in assistant problem
Siri ships on every iPhone and Alexa lives in millions of Echo speakers. Neither that reach nor those device budgets translated into satisfaction. Alexa scored 42.6 and Copilot 37.2, both well below Claude and the main chatbot products.
The YouGov data suggests that automatic installation creates a different class of users: people who encounter an assistant because it was already there, not because they chose it. Those users may apply stricter judgments or simply have lower engagement. Tools that require deliberate sign-up, like Claude or ChatGPT, tend to attract users who are more motivated to extract value, which could inflate their scores. The survey methodology does not adjust for this selection effect, so the absolute scores should be read with that caveat in mind.
Why it matters
For businesses evaluating which AI assistant to build into their workflows or recommend to staff, user satisfaction data from a structured survey is more useful than download counts or press coverage. A tool that scores well among former users is less likely to cause churn or frustration when deployed across a team.
Claude’s lead may also be linked to Anthropic’s recent product additions. The source article notes that Anthropic has been shipping practical integrations, including a Gmail Connector that lets Claude send emails automatically, which increases day-to-day utility. If you are assessing AI integration options for a business context, retention-oriented metrics like former-user satisfaction deserve weight alongside raw capability benchmarks.
For context, the broader picture of how Claude compares to ChatGPT on specific features is covered in our earlier piece on Claude features ChatGPT still does not have.
Our take
The headline number is real, but one country and five months of BrandIndex data is a limited sample. YouGov’s methodology does not weight for how often each assistant is used or what tasks users attempted, so a light Siri user who asked a bad question could drag the score the same way as a power user. Read these numbers as directional, not definitive.
That said, the former-user angle is harder to dismiss. A minus 4.7 score for Grok among people who actually left is not a rounding error. And Claude holding the top spot in both tables simultaneously is the kind of consistency that matters when you are picking a tool to integrate into a workflow rather than just testing for demos.
If your team is still deciding which assistant to standardise on, run a structured internal trial with real tasks, track which tool people choose after the trial ends, and treat that revealed preference as your personal version of the former-user score.
Frequently asked questions
Which AI assistant has the highest user satisfaction in 2026?
According to a YouGov BrandIndex survey of UK users run from March to July 2026, Claude from Anthropic scored highest with a net satisfaction score of 56.2, ahead of Gemini at 46.5 and ChatGPT at 46.0.
Why does Grok have such low user satisfaction?
YouGov's data shows Grok landed at the bottom of the ranking among current users and scored minus 4.7 among former users, the only negative score in the survey. This means former Grok users collectively reported more negative than positive experiences.
What does YouGov BrandIndex measure?
YouGov BrandIndex is a tracking system that interviews active users on a platform and asks targeted questions about specific brands or products, producing a net satisfaction score based on the balance of positive and negative responses.
How does Claude compare to ChatGPT in user satisfaction?
In the YouGov survey, Claude scored 56.2 versus ChatGPT's 46.0. Claude also ranked higher among former users, while ChatGPT showed a 63.7-point gap between current and former user satisfaction.
