Customer.io vs HubSpot

as AI assistants see them, week of 2026-09-28

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HubSpot edges out Customer.io overall, scoring 19 out of 100 versus 13, and shows up more often too: 19 of 59 answers compared with 12 of 59. Customer.io's strongest showings are for onboarding and drip emails and behaviour-based segmentation, named in 3 of 3 answers for each. HubSpot leads on broader marketing-platform questions, CRM integration, and 2026 software picks, named in 3 of 3 answers for all three. Head-to-head, HubSpot was named more often on 7 questions, Customer.io on 4, with 9 ties. By model, Perplexity rates HubSpot highest at 28, while Claude rates Customer.io highest at 19.

Head to head

metric	Customer.io	HubSpot
score	13	19
questions won	7	11

By assistant

Customer.io

assistant	score	named in, this week	usual spot, this week
ChatGPT	10	11% of answers	#1.5
Claude	19	35% of answers	#6.9
Gemini	not sampled this week
Perplexity	14	15% of answers	#1.7

HubSpot

assistant	score	named in, this week	usual spot, this week
ChatGPT	18	26% of answers	#4.2
Claude	13	30% of answers	#9.2
Gemini	not sampled this week
Perplexity	28	40% of answers	#4.0

Where they differ

Only Customer.io gets named for

Which email tool has the best deliverability?

Only HubSpot gets named for

What's the best email marketing platform that integrates with my CRM?
What's the best email tool with a good free tier for under 1,000 subscribers?
Which email marketing platform is best value for money?
What's the best email marketing tool for a small business?
What are the best free email marketing tools?

More comparisons

Not sold on either?

Scores count how often each assistant names a product, weighted by position. How the score works · Full Email marketing platforms leaderboard