Klaviyo Reviews, Ratings & Features 2026 | Gartner Peer Insights

Gartner defines email marketing as the use of the email channel to deliver and optimize marketing messages — such as brand newsletters or contextually relevant, real-time and personalized communications — in support of engagement across the customer journey. Email service providers often bolster their technology platforms with supplementary managed services to improve the value and scalability of the email channel. Email marketing helps marketers deliver information to their audiences after obtaining an email address. This can take the form of product or service updates, new promotions, transaction updates and more. As a relatively inexpensive method for communicating at scale with contacts, email provides value for different use cases across the full customer-engagement life span. Email is the most effective channel for several marketing objectives, including demand generation, conversion to sales, and customer loyalty and advocacy.

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Email Marketing (Transitioning to Email Marketing Platforms)

Klaviyo

Marketing Manager

Klaviyo has come a long way since I first started using the platform in 2019. Sending emails, etc shouldn't be complicated. I love the fact that is so easy to execute all of our needs within the platform. Plus ramp up for any new team members is a breeze. It's great using the drag and drop template editor so we don't need a developer on staff to help get things out the door. We usually need to pivot very quickly and updating creative with ease ensures we can move quickly.

<50M USD

50M - 250M USD

250M - 500M USD

500M - 1B USD

1B - 3B USD

3B - 10B USD

10B - 30B USD

30B + USD

Director Of Marketing

Klaviyo's campaign builder, flow builder and segmentation tools are all straightforward enough that most users can use them without much hand-holding, which matters when you need to move quickly. Beyond the product itself support has been good, proactive and responsive. 

Director of Marketing

Klaviyo has been exceptionally helpful in migrating from paying an agency to create emails for us at an expensive hourly rate with minimal control, to an easy to learn multi-channel platform with AI integration as well as the ability to sync with all of our e-commerce stack. We have made an incredible growth in our business by learning how to leverage Klaviyo, which has increased our profitability, repeat purchase rate, customer satisfaction and engagement.

If you are a fan of drag and drop editors, this is the perfect tool. If you are an HTML nerd, they can handle that too. Want to send plain text emails en masse or SMS text messages? Klaviyo can handle it all.

Klaviyo has invited us out to multiple events in our state, which has been an excellent way to meet and engage with the team that has put this incredible tool together. They've been happy to sit down with me and look over my shoulder while I demonstrated problems I was trying to solve or challenges I needed a hand with. They even followed up with me on LinkedIn and via email to ensure that I had everything I needed.

There are not many other companies that would give me a direct line to their engineering team and I really enjoyed that their team was willing to put on events for us to attend. I have worked with many vendors over the years, Klaviyo has been a favorite. 

I've been on with them since 2022 and no plans to look anywhere else. I started this journey with zero prior experience in email design and was able to teach myself in short order. Klaviyo always puts out free live training academies, so you'll be up to speed in no time!

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Klaviyo is the AI-first B2C CRM that unifies marketing, service, analytics, and data in one platform. The Klaviyo Data Platform keeps a single customer profile in sync across web, email, SMS, WhatsApp, mobile, and social. Teams automate workflows, segment easily, and deliver consistent, relevant experiences without extra tools or complex setup. Built-in K:AI agents plan and launch campaigns, personalize every send, answer questions, and resolve issues—so you grow faster while keeping operations simple and relationships strong.

Klaviyo‚Ñ¢ is a unified customer platform that gives online brands direct ownership of their consumer data and interactions, empowering them to turn transactions with customers into long-term relationships‚Äîat scale. With Klaviyo, brands can combine unlimited customer data with more than 250 native integrations to automate personalized email and SMS communications that make customers feel seen. Klaviyo makes it easy‚Äîno need to start from scratch, piece together multiple platforms, or rely on third-party marketplaces and ad networks. From mom-and-pop shops to established companies, innovative brands like Unilever, Taylor Made, Citizen Watches, and more than 90K other paying users leverage Klaviyo to acquire, engage, and retain customers‚Äîand grow on their own terms. See our social media community guidelines: www.klaviyo.com/legal/social-terms #Klaviyo

Reviews

Ratings Overview

Overall experience with

Favorable Review

Quick learning curve and strong support drive greater business growth

Critical Review

Smooth setup and workflows, but advanced features increase expenses

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