How do their growth rates compare?

Klaviyo has a month-over-month growth rate of +6.1%; Quantz® has 0%.

How does pricing compare?

Klaviyo: Paid. Free plan available with usage limits; paid marketing, service, and analytics plans scale by contact count and send volume (check the pricing page for current numbers). Quantz®: contact. ThinkX does not publish public pricing for Quantz, which is offered as a custom voice agent. Because it runs on the company's own servers, ThinkX markets a large cost advantage over API-plus-cloud voice systems. Contact ThinkX through its product inquiry form for a quote.

What are alternatives to Klaviyo and Quantz®?

Other tools in related categories include Salesforce Agentforce (formerly Einstein), Mailchimp, Brevo, MailerLite AI Drag & Drop Editor, GetResponse.

Head-to-Head Benchmark

Klaviyo vs Quantz®

Klaviyo records 6,674,207 monthly visits with +6.1% month-over-month growth and Paid pricing. Quantz® records 0 monthly visits with 0% growth and contact pricing.

KlaviyoPaidTraffic Leader

The AI-powered B2C CRM for email, SMS, and personalized marketing at scale

Monthly Visits

6.67M

MoM Velocity

+6.1%

Top Market

🇺🇸 United States

View Klaviyo Analysis

klaviyo.com

Quantz®contact

A proactive voice AI agent that runs on its own servers for instant, private conversations.

Monthly Visits

0

MoM Velocity

0%

Top Market

🌐 Global

View Quantz® Analysis quantz.thinkxinc.com

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Klaviyo	Quantz®
Official Domain	klaviyo.com	quantz.thinkxinc.com
Pricing Model	Paid	contact
Monthly Visits	6.67M (6,674,207)	0 (0)
MoM Traffic Delta

Primary Market & Share	🇺🇸 United States (38.7%)	🌐 Global (—)

Direct Visits / mo	4.43M	0

User Rating	4.6	4

Supported Platforms	Website	Website

Klaviyo

The AI-powered B2C CRM for email, SMS, and personalized marketing at scale

Unified customer profiles

Every contact, event, and channel feeds one profile so segmentation, personalization, and reporting stay consistent.

Composer AI marketing agent

An agent that plans calendars, drafts campaigns, audits flows, and recommends next actions using your business context.

Email, SMS, and omnichannel messaging

Build campaigns and automated flows across email, SMS, RCS, WhatsApp, push, and social from one interface.

Predictive analytics

Forecast lifetime value, churn risk, and expected next purchase date to target the right customers at the right time.

Strengths & Pros

+Deep ecommerce integrations and a strong customer data model
+Agentic AI features speed up campaign planning and copywriting
+Email, SMS, service, and analytics unified in one platform
+Free tier makes it easy to evaluate before committing

Limitations

Frequently Asked Questions: Klaviyo vs Quantz®

Klaviyo has 6,674,207 monthly visits, while Quantz® has 0. Traffic estimates describe audience size, not product quality.

More Head-to-Head Matchups

Klaviyo vs Salesforce Agentforce (formerly Einstein)

118.58M visits/mo

Quantz® vs Salesforce Agentforce (formerly Einstein)

Best Alternatives to Klaviyo & Quantz® (12)

–Costs rise quickly as contact lists grow

–Full potential requires clean, well-structured customer data

–Large feature surface has a learning curve for small teams

Quantz®

A proactive voice AI agent that runs on its own servers for instant, private conversations.

Private, programmable voice engine

ThinkX describes Quantz as a completely private, flexibly programmable and ultra-fast conversational agent foundation system built on a proprietary codebase of about 670,000 lines.

Fast real responses

The realtime engine is designed to deliver the substantial content of an answer immediately, rather than stalling the caller with filler acknowledgements while it prepares the reply.

Goal-driven conversations

Rather than only chatting, the agent pursues defined objectives autonomously, making it suited to service, sales and lead-generation calls.

Self-hosted economics

Because it runs fully on ThinkX's own servers, the company claims a large cost advantage over systems that combine third-party APIs with cloud infrastructure.

Strengths & Pros

+Ultra-low latency design aims for a genuinely real-time conversation
+Fully private deployment on the vendor's own servers, not a public API stack
+Proactive, goal-driven behaviour suits service, sales and lead capture
+Marketed as substantially more cost-effective than API-based voice systems

+Customised to each business rather than a generic self-service bot

Limitations

–The dedicated quantz.thinkxinc.com subdomain returned server errors during checks, so the demo environment may be intermittently unavailable
–Deep technical offering requires some understanding of voice AI deployment to evaluate
–No public self-service pricing, so everything starts with a sales conversation

01

Salesforce Agentforce (formerly Einstein)

111.9M/mo

SpecialistAutonomous enterprise AI agents and CRM intelligence powered by Salesforce Data 360 and Atlas.

AI App BuilderFreemium+2.2%

Salesforce Agentforce (formerly Einstein) website preview

02

Mailchimp

10.1M/mo

Broader general-purpose email marketing features, but less specialized ecommerce data segmentation compared to Klaviyo.

AI MarketingFreemium+1.1%

#2

03

Brevo

6.5M/mo

Offers more integrated multi-channel tools like WhatsApp and live chat, but less advanced ecommerce predictive analytics.

AI Email MarketingFreemium+5.8%

Screenshot of the Brevo campaign editor with automation and audience segmentation panels

#3

04

MailerLite AI Drag & Drop Editor

5M/mo

Simpler and more affordable for basic newsletter design, but lacks advanced predictive segmentation and revenue analytics.

No-Code&Low-CodeFreemium, Paid63% direct

05

GetResponse

2.2M/mo

Includes built-in landing page builders and webinars, but lacks Klaviyo's deep online store revenue attribution tracking.

AI MarketingFree Trial, Paid+1.3%

GetResponse dashboard showing an automated email journey in the visual builder

06

JustCall

780.3K/mo

AI communication platform for sales and support teams

AI AgentPaid+11.8%

JustCall interface showing dialer, SMS inbox and AI call coaching features

07

Robly Email Marketing

740.2K/mo

SpecialistEmail marketing with AI send-time optimization to lift opens

AI Email MarketingFree Trial, Paid+29.7%

Robly campaign builder showing email templates, audience selection and send scheduling

08

ActiveCampaign AI

526.8K/mo

Provides exceptionally powerful CRM automation workflows, but has a steeper learning curve for simple email campaigns.

AI MarketingFree Trial, Paid+0.5%

ActiveCampaign automation canvas showing an AI-generated customer journey

09

PolyAI

319.9K/mo

Free / Open-sourceEnterprise voice AI that resolves customer conversations

AI Voice AssistantsContact for Pricing+24.3%

PolyAI Dialog Studio interface for building and testing a voice agent conversation flow

10

Bland AI

243.6K/mo

Enterprise voice AI agents that handle your most regulated phone calls

AI Call CenterPaid, Contact for Pricing+7.4%

Screenshot of the Bland AI platform showing a phone agent conversation flow and monitoring dashboard

11

Synthflow.ai

95.5K/mo

Free / Open-sourceEnterprise AI voice agents that work inside your phone system

AI Voice AssistantsFree Trial, Contact for Pricing34% direct

Synthflow agent handling an inbound call with a live transcript and CRM update

12

bik.ai

62.6K/mo

Better native integration with WhatsApp and messaging channels for Shopify, but a smaller ecosystem of pre-built integrations.

AI MarketingContact for Pricing+5.5%

BIK AI commerce agent library and campaign dashboard for eCommerce brands

#1

Visit

Salesforce Agentforce (formerly Einstein)

111.9M/mo+2.2%

Official

SpecialistAutonomous enterprise AI agents and CRM intelligence powered by Salesforce Data 360 and Atlas.

AI App Builder54% direct

Freemium

Visit

Mailchimp

10.1M/mo+1.1%

Official

Broader general-purpose email marketing features, but less specialized ecommerce data segmentation compared to Klaviyo.

AI Marketing57% direct

Freemium

Visit

Brevo

6.5M/mo+5.8%

Official

Offers more integrated multi-channel tools like WhatsApp and live chat, but less advanced ecommerce predictive analytics.

AI Email Marketing65% direct

Freemium

Visit

MailerLite AI Drag & Drop Editor

5M/mo

Official

Simpler and more affordable for basic newsletter design, but lacks advanced predictive segmentation and revenue analytics.

No-Code&Low-Code63% direct

Freemium, Paid

Visit

GetResponse

2.2M/mo+1.3%

Includes built-in landing page builders and webinars, but lacks Klaviyo's deep online store revenue attribution tracking.

AI Marketing65% direct

Free Trial, Paid

Visit

JustCall

780.3K/mo+11.8%

AI communication platform for sales and support teams

AI Agent79% direct

Paid

Visit

Robly Email Marketing

740.2K/mo+29.7%

SpecialistEmail marketing with AI send-time optimization to lift opens

AI Email Marketing34% direct

Free Trial, Paid

Visit

ActiveCampaign AI

526.8K/mo+0.5%

Provides exceptionally powerful CRM automation workflows, but has a steeper learning curve for simple email campaigns.

AI Marketing58% direct

Free Trial, Paid

Visit

PolyAI

319.9K/mo+24.3%

Free / Open-sourceEnterprise voice AI that resolves customer conversations

AI Voice Assistants33% direct

Contact for Pricing

Visit

Bland AI

243.6K/mo+7.4%

Official

Enterprise voice AI agents that handle your most regulated phone calls

AI Call Center49% direct

Paid, Contact for Pricing

Visit

Synthflow.ai

95.5K/mo

Official

Free / Open-sourceEnterprise AI voice agents that work inside your phone system

AI Voice Assistants34% direct

Free Trial, Contact for Pricing

Visit

bik.ai

62.6K/mo+5.5%

Better native integration with WhatsApp and messaging channels for Shopify, but a smaller ecosystem of pre-built integrations.

AI Marketing63% direct

Contact for Pricing

Klaviyo vs Quantz®

Side-by-Side Traffic & Specification Matrix

Klaviyo

Strengths & Pros

Limitations

Frequently Asked Questions: Klaviyo vs Quantz®

How do Klaviyo and Quantz® compare in monthly traffic?

How do their growth rates compare?

How does pricing compare?

What are alternatives to Klaviyo and Quantz®?

More Head-to-Head Matchups

Best Alternatives to Klaviyo & Quantz® (12)

Quantz®

Strengths & Pros

Limitations