Customer.ioCustomer Engagement Platform For Better Outcomes

KlaviyoKlaviyo is the autonomous CRM for B2C brands, built to turn what you know about your customers into real growth.

Comparison · Marketing Automation · weekly run Nov 2

Customer.io vs Klaviyo

Which one do AI engines recommend, and how do they differ on price, fit and features?

Track both brands

The short answer

Klaviyo is the stronger AI pick in Marketing Automation: it has a visibility score of 21.6 versus 12.2 for Customer.io, and ranks ahead in 76% of the answers that name both.

Choose Customer.io if…

You need GDPR or CCPA or HIPAA coverage
Strong behavioral and event-driven automation
Well suited to product-led SaaS companies
Supports onboarding, activation and retention messaging

Choose Klaviyo if…

You want the brand AI engines rank higher (21.6 vs 12.2)
You want a free plan to start
AI answers describe it more positively (55% vs 34% positive)
You need ISO 27017 coverage

AI visibility side by side

Latest weekly run · Nov 2

Metric	Customer.io	Klaviyo
Visibility score	12.2%	21.6%
Change vs last week	New	New
Rank in Marketing Automation	#8	#6
Share of voice	4%	5.9%
Mentions this run	23	33
Positive in AI answers	34%	55%

The stronger value in each row is marked with a ✓.

Visibility score trend

Weekly runs over the last 60 days

Customer.io 0pp · Klaviyo 0pp over 0 weekly runs.

Engine by engine

Klaviyo leads on 3 of 3 engines

ChatGPT

13.3%

23.7%

AI Mode

4.4%

17.2%

Perplexity

18.9%

23.9%

Customer.ioKlaviyo

Head to head in AI answers

17 engine answers name both brands

4Customer.io ranked higher

13Klaviyo ranked higher

Prompt	Engine	Customer.io	Klaviyo
What should a marketing automation platform integrate with?	Perplexity	#3	#4
What are the best marketing automation tools in 2026?	ChatGPT	#7	#3
What are the best marketing automation tools in 2026?	Perplexity	#4	#3
Best marketing automation platform for startups	ChatGPT	#4	#6
Best marketing automation platform for startups	Perplexity	#4	#5
Which marketing automation platform has the best reviews?	ChatGPT	#6	#1
Compare the leading marketing automation platforms	ChatGPT	#8	#3
Compare the leading marketing automation platforms	Perplexity	#6	#5
Alternatives to the most popular marketing automation platform	ChatGPT	#7	#5
Alternatives to the most popular marketing automation platform	Perplexity	#8	#3
Best marketing automation platform with AI features	ChatGPT	#7	#3
Best marketing automation platform with AI features	Perplexity	#4	#2

Features, pricing & fit

Dimension	Customer.io	Klaviyo
Pricing model	Usage-based	Usage-based
Entry price	$100 / mo	Contact sales
Free plan	No	Yes
Deployment	Cloud-hosted, with US and EU data centers	—
Integrations	—	400+
Compliance	GDPR, CCPA, ISO 27001, SOC 2 Type II, HIPAA	SOC 2 Type II, ISO 27001, ISO 27017
Support	Email and chat support, Documentation and community support, Dedicated Customer Success Manager on Enterprise	Email support, Help Center and documentation, Klaviyo Academy courses, Klaviyo Community
Founded	2012	2012
Headquarters	Portland, Oregon, USA	Boston, MA, United States
Employees	201–500	1,001–5,000
Funding	Series A led by Spectrum Equity	IPO
Best for	Teams getting started with data-driven messaging, and teams scaling across channels with custom workflows.	Ecommerce and direct-to-consumer brands that want email, SMS and customer data in one platform, from small businesses starting on the free plan to large enterprises.