8 Best Email Marketing Software: A Head-to-Head Comparison Guide

Most email marketing software comparisons hand you a feature checklist, and by the time you've finished reading it, half the checklist has already changed. One platform ships an AI feature or a ChatGPT connector, and the others usually follow within weeks. Even the word "automation" can mislead you, because two platforms can both claim it while one offers simple drip sequences and the other orchestrates multi-step behavioral journeys across email, SMS, and web.

The best email marketing software is the one that runs your revenue-critical journeys with the least manual work. This guide compares eight platforms on feature depth, who each one fits, and what you'll pay as your list grows.

Every platform follows the same template, including a real limitation, and since ActiveCampaign is our own product, we held it to those same rules.

Email marketing software is a platform for building, sending, automating, and measuring marketing emails. It stores your contacts, designs your messages, triggers sequences based on what subscribers do, and reports on opens, clicks, and revenue. Teams move up from basic tools when manual sends and spreadsheet segmentation begin costing more time than they save.

Each platform was judged on four criteria, using public pricing pages, review sites, and ActiveCampaign's customer win and loss research:

• Feature depth: what the platform can do once the campaign is sent
• Fit: who the platform was built for and where its limits start to show
• Pricing at scale: how the bill changes as your list grows
• Evidence: vendor pricing pages, G2 and Capterra reviews, and what customers say when they pick or leave a platform, including our analysis of 6,887 sales calls

That's why the platform sections below describe deliverability tools instead of scores. EmailTooltester explains its new approach in detail, and our guide to email deliverability covers the parts you control, such as authentication, list cleanup, and dedicated IP options. They deserve your attention, because everything else an email service provider (ESP) does depends on your emails reaching the inbox.

AI features and MCP connectors now come standard on the top platforms, so neither one will help you tell the tools apart anymore.

Four shifts matter most when you compare platforms today:

• MCP connectors are common. Klaviyo, HubSpot, and Mailchimp now offer them alongside ActiveCampaign, so the more useful question is what a marketer can actually do through the connector.
• AI placement varies. Some assistants stay open beside your work and know your account, while others only help inside the single screen you happen to be on.
• Consolidation is back. Some buyers want CRM and email in one platform to simplify their stack and trim costs, and Constant Contact has announced a multilocation product.
• The deliverability scoreboard retired. EmailTooltester stopped publishing seed-list rankings and now rates the deliverability features each platform provides.

Full disclosure: ActiveCampaign is our product, so we held it to the same template as every other platform.

ActiveCampaign is an AI platform for marketers who want to run the programs they've always planned, with Active Intelligence built into every plan. Where many platforms bolt automation onto a newsletter tool, ActiveCampaign was built from the ground up to orchestrate complex customer journeys without a dedicated ops team. A win-back flow that sat on your list for a year now starts as a draft built from your own history. Once you approve it, you can run every lifecycle flow you've been meaning to build. For a closer look at the approach, read our guide to AI-native marketing.

Customers who use Active Intelligence see 75% higher engagement than customers who don't, across 32,948 accounts. A weekly Scheduled Task can report what worked and what didn't, so next week you repeat the winners and drop the duds.

ActiveCampaign also works where you already do your thinking. Through MCP, you can run your ActiveCampaign marketing from ChatGPT or Claude and approve each step as it happens. Most major platforms offer a connector now, so compare what each one actually lets you do. In ActiveCampaign, that includes creating a campaign from a single prompt and building automations.

ActiveCampaign standout features

• Active Intelligence in every plan. It learns from your own sends, engagement, and workflows, so its suggestions reflect how your account really works instead of generic advice.
• A visual automation builder. You get 45 triggers, goals, and split testing, plus pre-built recipes for welcome series, abandoned carts, and re-engagement, so you rarely start from a blank canvas.
• Segmentation and personalization. With 86+ segmentation conditions, AI-suggested segments, and Predictive Sending for each contact, every group hears from you the way you'd write to them.
• A built-in sales CRM. Deal pipelines, lead scoring, and automated follow-up sit right next to your email data, so warm leads reach sales without a second tool.
• One workflow across channels. Email, SMS, WhatsApp, and site messaging run together with unified reporting, backed by 1,000+ integrations.

ActiveCampaign limitations

• Small teams with no dedicated marketer. If you send an occasional newsletter to a small list, Constant Contact or Mailchimp is quicker to pick up. Prompting is also a skill, so treat whatever Active Intelligence drafts as a strong first version and review it before it goes out.
• Complex B2B sales cycles. The built-in CRM covers pipelines, scoring, and follow-up well. Teams with long, multi-stakeholder sales cycles often move to HubSpot or Salesforce for the CRM and keep ActiveCampaign for marketing.
• Very large scale. Brands that manage millions of contacts through data warehouses and a CDP tend to outgrow ActiveCampaign.

ActiveCampaign pricing

ActiveCampaign plans start at $15 per month for 1,000 contacts on Starter with annual billing, or $19 per month billed monthly. The built-in CRM, lead scoring, and SMS arrive on Plus, which starts at $49 per month for 1,000 contacts on annual billing. There's no free plan, but you can try ActiveCampaign free for 14 days, and the pricing page shows every tier. You can also explore the platform in the self-guided product tours. Reviewers on G2 rate ActiveCampaign 4.5 out of 5 across more than 14,500 reviews.

HubSpot's primary strength is unification. Marketing, sales, and service can all live on one CRM record if you invest in the full suite, which makes email a natural extension for organizations already running their go-to-market in HubSpot. It automates internal CRM processes such as lead routing, lifecycle stages, and handoffs well, while ActiveCampaign is built to automate the customer journey itself across channels. G2 reviewers rate Marketing Hub 4.4 out of 5. For a deeper side-by-side, read ActiveCampaign vs. HubSpot.

HubSpot standout features

• CRM-driven personalization. Email content draws on CRM properties, lifecycle stages, and custom objects, so each message reflects where a contact sits in your pipeline.
• Workflows. A drag-and-drop builder supports conditional logic, delays, and multi-branch paths on Professional and above.
• Breeze AI. Breeze Copilot drafts content and suggests workflows, and Breeze Agents cover content, social, and prospecting. The assistant stays open as a sidebar that knows your CRM.

HubSpot limitations

• Credit-based AI and tier gating. Some AI features use HubSpot Credits, which are harder to predict at scale, and per-contact send-time optimization and advanced smart content sit in the higher tiers.
• Overhead for email-first teams. Workflows are strong for cross-team processes but less flexible for highly customized behavioral email journeys, and the full suite adds configuration and pricing complexity you may not need.

HubSpot pricing

HubSpot has free tools, and Marketing Hub Starter costs about $20 per seat per month on monthly billing, with lower annual rates. Workflows arrive on Professional, which starts at about $800 per month billed annually, or $890 monthly, with three seats and a required $3,000 one-time onboarding fee. Enterprise starts at about $3,600 per month with a $7,000 onboarding fee, and marketing contact tiers add monthly fees as your list grows. Weighing the cost difference? See what teams get when they switch from HubSpot.

Mailchimp is one of the most recognized names in email marketing, and its approachable builder gets a first campaign out the door quickly. Recent pricing changes have shifted its value, though. What was once the default choice for small businesses now costs more as lists grow, and its automation depth runs out sooner than on other platforms. G2 reviewers rate it 4.3 out of 5. For a deeper side-by-side, read ActiveCampaign vs. Mailchimp.

Mailchimp standout features

• An intuitive email builder. You get drag-and-drop editing, 100+ templates, and a Canva integration.
• Marketing Automation Flows. These offer drag-and-drop rules, branching paths, delays, and pre-built flow templates, with availability that varies by plan.
• AI marketing tools. Content and design help sits right inside the editor.

Mailchimp limitations

• Automation depth. Teams that need conditional branching, goal tracking, or multi-step behavioral workflows will find Mailchimp restrictive next to ActiveCampaign or Klaviyo.
• Contact counting. Mailchimp counts contacts across all audiences, so one person on two audiences counts twice toward your limit.
• AI scope. Its assistant helps inside the box you're working in, but there's no persistent sidebar that knows your account.

Mailchimp pricing

Mailchimp's free plan covers 250 contacts and 500 sends a month, with a daily cap of 250 sends and no automations. It was cut from 500 contacts and 1,000 sends in early 2026. Paid plans start at $13 per month for 500 contacts on Essentials, and multi-step automations need Standard, which starts at $20 per month. Legacy plans also saw increases of 11% to 13% in April 2026. You can read the full story in Mailchimp's 2026 price increase and what it means for you. Ready to move? Here's how to switch from Mailchimp.

Klaviyo is a data-driven email and SMS platform built for ecommerce, with deep Shopify integration. Think of it as a specialist who has memorized your store's entire catalog. It has also pushed hard into AI and MCP, so you can run it from ChatGPT or Claude. G2 and Capterra reviewers both rate it 4.6 out of 5. For a deeper side-by-side, read ActiveCampaign vs. Klaviyo. If most of your revenue is B2C, Klaviyo is likely the better choice, because its data model starts with purchases, carts, and browsing. If you're weighing your options, see our guide to Klaviyo alternatives.

Klaviyo standout features

• Ecommerce-first segmentation. Segments build from purchase behavior, browse history, and predicted lifetime value.
• Lifecycle flows. Pre-built automations cover cart recovery, browse abandonment, post-purchase follow-up, and winback.
• Email and SMS together. Both channels run in one platform, and revenue attribution ties each send to actual sales.

Klaviyo limitations

• Built around retail data. B2B companies, service businesses, agencies, and creators often find that many features don't apply to them.
• Limited CRM. Businesses that need deeper CRM functionality usually pair Klaviyo with a separate sales platform.

Klaviyo pricing

Klaviyo prices on active profiles (see its pricing page), and the free plan covers 250 profiles and 500 sends a month. Email plans start at $20 per month for 500 profiles and $30 for 1,000, then climb to about $720 per month at 50,000 profiles and $1,380 at 100,000. Monthly sends cap at roughly 10 times your profile count, and SMS is billed separately.

Constant Contact has been around since the late 1990s, and simplicity is its calling card. It suits small local businesses, nonprofits, and event-driven marketers who want clean, professional emails without a steep learning curve. It has also added AI content tools and proactive insights, and it appeals to buyers who want one simple, lower-cost tool. G2 reviewers rate it 4.1 out of 5. For a deeper side-by-side, read ActiveCampaign vs. Constant Contact.

Constant Contact standout features

• Event marketing tools. Invitations, registrations, and reminders live in the same system as your email.
• AI and proactive insights. AI writes email copy and subject lines, and suggested next actions greet you when you log in.
• Phone and chat support. Marketing advisors answer by phone or chat, a human touch that has become rare among small-business platforms.

Constant Contact limitations

• Shallow automation, segmentation, and analytics. It works well for straightforward campaigns but lacks the workflow and reporting depth that multi-branch lifecycle journeys need.
• Limited reporting flexibility. Reviewers describe resorting to screenshots or copy and paste to share reports.

Constant Contact pricing

Constant Contact has no free plan, only a free trial, and its pricing page lists every tier. Lite starts at $12 per month for 500 contacts and $30 for 1,000, while Standard and Premium start at $35 and $80 for 500 contacts. Costs climb as your list grows.

Brevo (formerly Sendinblue) is a multichannel platform that makes email and SMS accessible and affordable. Its send-based pricing is a real differentiator for businesses with large contact lists and moderate sending. Like ActiveCampaign, it handles transactional email alongside marketing campaigns. G2 reviewers rate it 4.5 out of 5. For a deeper side-by-side, read ActiveCampaign vs. Brevo.

Brevo standout features

• Multichannel messaging. Email, SMS, and WhatsApp run from one dashboard.
• Transactional email. An SMTP relay and API send order confirmations, password resets, and notifications.
• Send-based pricing. Your cost follows email volume instead of list size.

Brevo limitations

• Basic automation. The workflow builder is lighter than platforms built for lifecycle marketing, so multi-branch behavioral journeys can start to feel limiting.
• Fewer integrations. With about 150 native connections, Brevo has the smallest integration list here.

Brevo pricing

Brevo has a free plan, and paid plans start at $9 per month for 5,000 emails. Costs depend on send volume, so a business with 50,000 contacts that emails twice a month can pay less than it would on a contact-based platform. Branding removal is a paid add-on on Starter, and the Professional tier starts at $499 per month, which is where several advanced features sit.

Omnisend is built for ecommerce stores that want multichannel marketing running fast, without weeks of configuration. Its ready-to-run workflows map to common retail scenarios, and email, SMS, and push share one automation builder. G2 reviewers rate it 4.5 out of 5. For a deeper side-by-side, read ActiveCampaign vs. Omnisend.

Omnisend standout features

• Pre-built ecommerce workflows. Cart recovery, browse abandonment, and post-purchase sequences run across email, SMS, and push.
• Behavior-based segments. Lists build from shopping behavior, purchase history, and lifecycle stage.
• Store integrations and reporting. Shopify and WooCommerce sync your data, and revenue attribution compares total store revenue with Omnisend-attributed sales.

Omnisend limitations

• No built-in CRM for sales teams. B2B companies and service businesses are unlikely to find the tools they need.
• Lighter segmentation depth. Broader lifecycle platforms go deeper across industries.

Omnisend pricing

Omnisend's free plan covers 250 contacts and 500 emails a month. Standard starts at $16 per month for 500 contacts, and Pro starts at $59 per month with unlimited emails and advanced personalization such as product recommendations. Since May 4, 2026, new customers buy SMS credits as a separate subscription on Pro only, from about $0.007 per message depending on volume and country.

GetResponse bundles standard campaigns with landing pages, webinars, and conversion funnels, so it works like a launch toolkit in a single box. It has carved out a niche with creators, coaches, and educators who want those tools in one place. G2 reviewers rate it 4.3 out of 5. For a deeper side-by-side, read ActiveCampaign vs. GetResponse.

GetResponse standout features

• Landing pages and funnels. Opt-in pages, thank-you pages, and automated follow-ups need no third-party tool.
• Built-in webinar hosting. Registration pages and attendee tracking connect straight to your email sequences.
• A visual automation builder and creator tools. Conditional logic is available, and higher tiers add course creation and monetization.

GetResponse limitations

• Lighter automation. Branching logic and scoring sit on higher-tier plans.
• Lighter CRM and sales features. CRM-backed platforms go further.

GetResponse pricing

GetResponse's Starter plan costs $19 per month for 1,000 contacts, but it excludes webinars and includes only limited automation. Webinars need a premium plan or a separate purchase. That means the advertised entry price rarely matches what you'll pay for the features that attracted you in the first place.

Picture a growth marketer launching one revenue-critical journey on every platform in this guide. Feature lists don't reveal how a platform handles that kind of work, so the same five steps make a fair comparison.

Use these five steps to compare every platform:

1. A visitor downloads a lead magnet through a form.
2. A nurture sequence adapts based on opens, clicks, and site visits.
3. The lead score rises as engagement grows.
4. High-intent leads trigger a sales handoff, with a deal and task created automatically.
5. Reports tie results back to revenue.

Here's how each tier handles those steps:

• Basic tools (Mailchimp, Constant Contact) handle steps 1 and 2, but lead scoring and sales handoff need extra tools or workarounds.
• Ecommerce specialists (Klaviyo, Omnisend) are strong on purchase triggers and weaker on sales handoff.
• Funnel and volume tools (GetResponse, Brevo) cover capture and nurture, with lighter scoring and CRM.
• CRM-first (HubSpot) handles every step, though full automation requires Professional tier pricing.
• ActiveCampaign runs all five steps in one workflow, with a built-in CRM, lead scoring, follow-ups across email, SMS, and WhatsApp, and attribution reporting.

Active Intelligence can draft this whole journey from one plain-language prompt. You stay in control by editing the draft, refining the branches, and launching it when you're ready. Afterward, you can ask for the ROI of the campaign, and Active Intelligence analyzes results across your campaigns instead of handing you raw data. For more on building journeys, see our guide to email automation software.

A tool that feels perfect today can become a bottleneck in 12 months if it can't grow with you, so build your growth plans into the decision from the start. A feature list tells you what a platform has, and the entry price tells you what the first month costs. Neither one reveals what you'll pay at twice your list size, or whether the automations can do what you need. Our breakdown of the true cost of email marketing shows how far apart those two numbers can drift.

Score each shortlisted tool from 1 to 5 on these questions:

1. Can it automate a full journey, including scoring and sales handoff, in one workflow?
2. Do segments update in real time based on behavior?
3. Does the AI support the full workflow or only draft copy?
4. Does it offer strong deliverability tools, such as SPF, DKIM, and DMARC authentication, list cleanup, and dedicated IPs?
5. Does it connect to your CRM, store, and sales tools natively, and which connections need a third-party tool?
6. What does it cost at two and five times your current list size?

AI assistants are good at building a shortlist and less reliable on integration details, so confirm each connection on the vendor's own integrations page. Before you commit, run the same five-step journey through every tool on your shortlist, the way you'd test-drive a car before signing the paperwork.

Here's a fit-based framework to match your situation to the right platform:

Skip ActiveCampaign in these three situations:

• You have a small list and no dedicated marketer. Constant Contact or Mailchimp is easier to pick up and start using.
• Your business runs on a Shopify store. Klaviyo's store data goes deeper.
• You manage millions of contacts on a data warehouse and CDP. An enterprise suite fits that scale better.

Switching platforms takes planning. If you're thinking about switching to ActiveCampaign, free onboarding and free data migration are available, and our migration guide walks you through the move. In a survey of 456 ActiveCampaign customers by UserEvidence in September 2025, 83% reported a positive ROI within the first year.