Customer.io in AI answers
Email Marketing · August 2026 edition · customer.io
Global rank
#16
of 38 brands
Visibility score
8.4
out of 100
Coverage
10%
9 of 90 answers
Named first
2
2% of answers
Across 30 brand-blind Email marketing buying questions asked to OpenAI, Gemini, Claude, Customer.io was mentioned in 9 of 90 answers, and was the first brand named 2 times. It does not appear at all on Claude.
Engine by engine
| Engine | Rank | Score | Answers | Share of voice |
|---|---|---|---|---|
| OpenAI gpt-5.4-mini | #12 | 11.6 | 4 / 30 | 2.4% |
| Gemini gemini-3-flash-preview | #10 | 13.7 | 5 / 30 | 3.3% |
| Claude claude-haiku-4-5 | not mentioned | 0.0 | 0 / 30 | 0.0% |
Best performing question
“What email tool works best for B2B SaaS lifecycle emails?”
On OpenAI, Customer.io was mentioned first in the answer.
Most visible brands in Email Marketing
See the full Email Marketing rankingThis page measures how often Customer.io appears in AI-generated answers, across 30 buying questions collected in August 2026. It says nothing about market share, product quality or revenue, and is neither an endorsement nor a criticism of the product.
Your brand isn't where you want it to be?
The Index is a public snapshot of one market. Tonaily tracks your own brand and your competitors across AI answers, month after month, and shows which questions you win.