The Best Marketing Automation Platform of 2026 - Klaviyo
2026-03-10 15:03 Diff
https://www.klaviyo.com/blog/best-marketing-automation-platforms

Disclaimer: this blog was written in collaboration with SmartSites. No compensation was exchanged for this collaboration.

Choosing a marketing automation platform isn’t just about today’s sends. It’s about how efficiently you can turn visitor intent into long-term customer value as you scale.As director of email marketing at SmartSites, a digital marketing agency based in the NYC metropolitan area, I guide brands through the purchase of a new marketing automation platform regularly.Below I’ll walk through the key criteria I use when recommending platforms, then share my top picks for 2026 with quick pros, cons, and who each one is best for.

5 criteria for choosing the best marketing automation platform

1. Cost and scalability

Pricing models for marketing automation platforms vary wildly, by contacts, sends, credits, or “super messages.” Look for transparent pricing that scales with your list growth and channel mix, so you’re not migrating again after a year.

2. Complexity vs. speed

Some teams need power and deep configurability. Others need to launch in hours, not weeks. Balance enterprise bells and whistles with how quickly your team can execute.

3. Integrations and data access

Native ecommerce and CRM integrations (or a well-documented API) are non-negotiable in a marketing automation platform. Good data in = good personalization out.

4. Data infrastructure

Look for:

“When brands switch marketing automation platforms, the biggest gains usually come from better deliverability and smarter segmentation, not just flashy features,” says Mike Tatum, lifecycle marketing lead at Prismfly.

When brands switch marketing automation platforms, the biggest gains usually come from better deliverability and smarter segmentation, not flashy features.
Mike Tatum, lifecycle marketing lead

Prismfly

5. UX/UI for day-to-day work

If the marketing automation platform is clunky, you won’t use the features you’re paying for. Builders, reporting, and troubleshooting should feel intuitive.

“Most teams overbuy complexity and underinvest in execution,” says Ben Zettler, founder of Zettler Digital. “The best system is the one your team can actually use every day.”

To that end, “look for speed to launch, accessible data, and transparent pricing before you chase advanced features you’ll never operationalize,” Zettler suggests. “Marketing automation only drives growth when the team can move fast without calling an engineer.”

Marketing automation only drives growth when the team can move fast without calling an engineer.
Ben Zettler, founder

Zettler Digital

4 of the top marketing automation platforms for 2026

Klaviyo: best for B2C growth and B2C lifecycle marketing

Why I like it: Klaviyo is purpose-built for B2C commerce with deep segmentation, predictive analytics, and native support for email, text messaging, WhatsApp, and mobile push, plus strong ecommerce integrations and templates. Unified profiles (with historic and real-time events) make advanced personalization far easier than most stacks.

Reporting and attribution are closer to industry norms, and the new omnichannel campaign builder brings email, SMS, push, RCS, and WhatsApp into one canvas with combined reporting and AI-powered channel affinity controls.

Pros

Cons

Granular data model and fast, marketer-friendly segmentation/personalizationRobust ecommerce integrations and retail-specific automationsStrong AI investments (e.g., agentic marketing and support, full marketing strategy and asset generation that adapts to your brand, predictive analytics)Customer service and helpdesk capabilities that tie service data to marketing profilesExtended tracking (e.g., compliant ID extension) that improves profile resolution and reporting

Primarily focused on ecommerce and B2C; not a fit for brands with a traditional B2B processFeature depth can be overwhelming; teams may need guidance to unlock quick wins

Best for: DTC brands, multi-brand retailers, and marketplaces that want speed to value, strong revenue attribution, and an omnichannel lifecycle strategy

More than 50,000 brands have switched from Mailchimp or Salesforce to Klaviyo, seeing an average 48x ROI after consolidation. Klaviyo retains event-level data indefinitely, unlike competitors that purge after 30–90 days. This gives brands more power to segment by behavior, SKU, lifetime value, and more.

Klaviyo supports not just email, but also SMS/RCS, mobile push notifications, and WhatsApp, all from a unified platform. You can build flows that trigger an email to a subscriber, then a rich text message if they don’t engage, then a push notification via your mobile app, all tied to the same customer profile and data.

Klaviyo’s WhatsApp functionality, meanwhile, allows for two-way, conversational messaging (e.g., rich media, quick replies) that’s tied into the same data engine powering email and SMS, so your support, marketing, and commerce teams can speak with one voice.

With mobile app channels (push/in-app messaging) included in the same flows, brands can reach customers at key moments, whether they’re opening mail, browsing on mobile, or logged in to your app.

K:AI Marketing Agent builds on-brand flows, segments, and content through natural language, while K:AI Customer Agent provides 24/7/365 customer support that drives revenue, including personalized product recommendations and quick answers for customers who need shopping assistance. Klaviyo Helpdesk, meanwhile, connects marketing and service teams with full customer context in one view.

The bottom line: “The right automation platform shouldn’t just send messages,” says Zettler. “It should become the backbone of your customer data. Klaviyo’s advantage is that it was built for ecommerce from day one. Every SKU, order, and signal feeds back into segmentation and personalization automatically, which is why brands that switch stop wasting time trying to duct-tape tools together.”

The right automation platform should become the backbone of your customer data.
Ben Zettler, founder

Zettler Digital

HubSpot: best all-in-one for B2B

Why I like it: HubSpot is a practical, approachable, all-in-one CRM for B2B brands that combines sales workflows and marketing automation. The platform offers great documentation and an easy learning curve for lean teams focused on lead nurture.

Pros

Cons

Intuitive UI, strong onboarding resourcesSales and marketing alignment out of the boxSolid automation for lead capture, scoring, and nurture

Marketing features require separate subscriptions; costs can climb as you scale.Not designed for B2C brands

Best for: SMB and mid-market B2B teams that want a single pane of glass for sales and marketing without heavy development work.

The bottom line: HubSpot is ideal for inbound lead generation and nurturing, not transactional commerce. It lacks native support for order events or product-based triggers, and adding advanced automation requires upgrading to Marketing Hub tiers that can quickly increase total cost.

Salesforce Marketing Cloud: best for complex enterprise brands already deeply invested in the Salesforce ecosystem

Why I like it: Salesforce Marketing Cloud provides enterprise-grade automation and personalization at scale, especially when tightly integrated with Sales and Service Cloud. If you have experienced developers and a larger budget, it can power sophisticated programs.

Caveat: Brands need to be using Salesforce heavily in order to make this happen. Even then, it requires a lot of work.

Pros

Cons

Enterprise breadth (email, SMS, push, WhatsApp) and a deep Salesforce ecosystemAdvanced personalization and orchestration potentialSecurity, compliance, and localization options for global brands

Serious complexity is real—segments, for example, often require SQL, AMPscript, or add-ons.Siloed data architectures and connector sprawl increase maintenance and cost.Ongoing developer/agency support is common; total cost can rise quickly. Fairly small marketplace of integrations

Best for: large organizations standardized on Salesforce, with in-house technical resources and long, complex buying cycles.

The bottom line: Salesforce Marketing Cloud is built from multiple acquisitions—ExactTarget, Pardot, Evergage, Datarama, among others—each running on different architectures. That means data lives in silos called “data extensions,” requiring developers or IT to unify profiles. Creating journeys or complex automations can require dev work and be costly, and ongoing maintenance often demands certified partners or additional Data Cloud licenses. While it’s a capable system, it’s heavy for teams that need speed and autonomy.

Mailchimp: best entry point for simple programs and small lists

Why I like it: Mailchimp provides a familiar, approachable starting point for basic newsletters and straightforward automations, especially for early-stage B2B and lead generation.

Pros

Cons

Low barrier to entry and quick set-upRecognizable brand; easy to get a simple program off the ground

Limited advanced segmentation (heavy reliance on tags and aggregated fields)Data retention caps by plan restrict long-term event-level insights.Limited ecommerce depth Very basic omnichannel orchestration, with no multi-channel or multi-message campaignsCosts can climb as lists and sending volume grow.

Best for: early-stage teams with simple newsletter workflows who don’t need deep ecommerce data or advanced automation—yet

The bottom line: Mailchimp’s data retention varies widely by plan, from 30 days on free accounts to 18 months on premium tiers. This makes historical segmentation difficult. Many users report lacking SKU-level detail for purchase events, limiting targeted campaigns by product type or variant. Its pop-up builder, now powered by Amped, offers advanced design features but a clunky dual-layout editing experience. Reporting uses generous 30-day click and 5-day SMS windows, which can inflate attribution metrics compared with industry standards.

Want a single view you can talk through with your team?

Check out this comparison table:

Feature

Klaviyo

HubSpot

Salesforce Marketing Cloud

Mailchimp

Primary audience / use case

B2C and/or ecommerce lifecycle growth; fast time to revenue

B2B SMB to mid-market brands; all-in-one CRM + marketing

Large enterprises already standardized on Salesforce

Early-stage newsletters and simple automations

Data model + profiles

Unified customer profiles with real-time + historic events

CRM-first contact model; solid for lead data

Data extensions; unified profiles require add-ons (Data Cloud)

List/tag centric; limited event-level history by plan

Segmentation + personalization

Granular, marketer-friendly; predictive properties

Good lead scoring/nurture; less commerce depth

Powerful but often SQL/AMP script-heavy

Basic tags/conditions; advanced use cases hit limits

Channels

Email, SMS/RCS, push, WhatsApp

Email, SMS, social

Email, text messaging, push, WhatsApp

Email + basic text messaging

Omnichannel orchestration

Omnichannel campaign builder with one canvas + combined reporting

Good for lead journeys; not commerce-centric

Journey Builder; powerful but complex

Single-message campaigns; limited cross-channel

Ecommerce depth

Deep native integrations; back-in-stock, low-inventory, product feeds

Not designed for ecommerce

Depends on custom work and connectors

Limited ecommerce features; back-in-stock constraints

AI

Agentic workflows; full-brand content generation; predictive analytics

Helpful automation and content assist for B2B

Einstein and/or Agentforce across products (often add-ons)

Basic generative copy; lighter-weight assistants

Reporting + attribution

Customizable; industry-standard windows; real-time insights; omnichannel and multi-touch attribution

Clear B2B funnel/nurture reporting

Broad but fragmented across modules; slower to self-serve

Generous default windows can inflate results

Identity + tracking

Extended ID options to improve recognition and continuity

Standard identity resolution for leads/contacts

Identity resolution via Data Cloud; set-up required

Retention caps and fewer identity resolution tools; requires third-party integrations

Forms + pop-ups

Intuitive builder; great for SMB teams; partners for advanced needs

Easy lead capture for B2B

Often custom or partner-built

Amped-powered advanced forms; steeper learning curve

Helpdesk / service

Unified Helpdesk + Customer Hub links marketing and service data; available as add-ons

Service Hub (separate product)

Service Cloud (separate, heavy integration)

Doesn’t offer a full helpdesk.

Integrations ecosystem

Strong ecommerce and loyalty network; robust APIs

Wide B2B ecosystem; sales/CS alignment

Deep Salesforce product ecosystem

Broad basic connectors; fewer commerce-first

Implementation + ongoing effort

Fast to value; marketer-owned

Quick for lean teams

Significant; developer/agency involvement common

Quick start; complexity rises with scale

Pricing model

Profiles + sends; transparent tiers

Modular pricing

Base + add-ons + usage; complex

Low entry; costs climb with volume

Best for

DTC brands focused on personalization and omnichannel growth

B2B teams needing unified sales + marketing

Enterprises with dev resources and Salesforce stack

Small teams sending basic newsletters

Watch-outs / limits

Depth can overwhelm; fewer non-commerce use cases

Not built for ecommerce

Cost and complexity; siloed data without add-ons

Limited segmentation, data retention, and orchestration

Why these comparisons matter

Many brands underestimate how quickly complexity and cost creep in once they scale. “Marketing automation isn’t just about sending messages,” says Tatum. “It’s about timing, segmentation, and relevance. The right platform makes that seamless.”Over 50,000 companies have switched from Mailchimp or Salesforce Marketing Cloud to Klaviyo, citing segmentation, data access, and usability as top reasons. Klaviyo processes 2.5 billion daily events and sent over 22 billion messages total during BFCM 2025, demonstrating proven scalability for brands of all sizes.

If you’re an ecommerce brand that wants advanced personalization, measurement you can trust, and faster iteration, Klaviyo is the most pragmatic choice.

Marketing automation is about timing, segmentation, and relevance. The right platform makes that seamless.
Mike Tatum, lifecycle marketing lead

Prismfly

Marketing automation platform buying checklist: use this before you sign

  • Data access: Can marketing teams build segments without a sales qualified lead? Can you see segment size instantly?
  • Identity: Does the platform resolve identities across devices/channels?
  • Attribution and reporting: Are windows configurable and close to industry norms? Can non-technical teammates self-serve answers in minutes? Does the attribution support more advanced use cases, like multi-touch, omnichannel attribution?
  • Omnichannel: Can you coordinate email, text messaging, WhatsApp, and push on one canvas, with shared reporting and channel affinity?
  • Ecommerce depth (if relevant): Does the marketing platform offer pre-built flows like back-in-stock and low inventory, product feeds, SKU-level segmentation, and return/subscription signals?
  • Total cost of ownership: What are the costs, including licensing plus add-ons, data/credit overages, implementation, and ongoing developer/agency time?
  • Time to first value: How long from contract to first automated revenue?

FAQs

Is Klaviyo only for “big” brands?

No. Klaviyo serves many audiences, with a clear path from launch to enterprise without changing platforms. Many brands switch to Klaviyo from entry-level tools once they need more reliable attribution and segmentation.

Will HubSpot work if we add ecommerce later?

HubSpot excels for B2B. If ecommerce is on the roadmap, map the data you’ll need (e.g., orders, SKUs, returns, subscriptions) and confirm how those events will populate customer profiles for segmentation and flows.

Is Mailchimp “bad” for segmentation?

It’s fine for basic lists and tags. If you plan to personalize by SKU/variant, predictive propensity, or multi-event behaviors across channels, you’ll hit limits quickly.