Mailchimp and Constant Contact both provide email creation, contact management, forms, segmentation, automation, reporting, and adjacent marketing features. Mailchimp offers more sophisticated audience and journey possibilities and a broader path toward ecommerce or multichannel marketing. Constant Contact prioritizes straightforward campaign creation, service, events, and a small-business-friendly workflow.
Side-by-side comparison
| Area | Mailchimp | Constant Contact |
|---|---|---|
| Best for | Growing businesses needing segmentation and automation flexibility | Local businesses, nonprofits and associations wanting simplicity and support |
| Free option | Limited free plan | Trial rather than a permanent free plan |
| Entry limits | Free currently allows 250 contacts and 500 monthly sends | Paid tiers scale by contact bracket and send multiple |
| Automation | Marketing Automation Flows and templates by tier | Welcome, engagement and broader automation by tier |
| Testing | A/B and multivariate capabilities depend on plan | Subject-line testing and resend tools depend on plan |
| Events | Landing pages and integrations | Strong event-marketing orientation and related tools |
| Ecommerce | Strong integrations and customer journey data | Suitable integrations but less commerce depth |
| Support | Support channel and duration vary by plan | Known for phone/support access on eligible plans |
| Main drawback | Contact-based price escalation and tier complexity | Smaller automation depth and no enduring free tier |
Mailchimp’s 2026 free plan supports one audience, one seat, up to 250 contacts, and 500 sends per month with a daily cap. Paid tiers expand sends, users, support, automation, testing, and reporting. Constant Contact uses Lite, Standard, and Premium-style tiers, contact brackets, and monthly send allowances commonly expressed as a multiple of the highest contact tier. Overage charges can apply. Check live regional pricing and renewal.
Email creation and templates
Mailchimp’s builder offers content blocks, templates, brand assets, dynamic or personalized content by tier, previews, and AI-assisted creation. It supports a broad campaign ecosystem around landing pages, forms, surveys, social or advertising functions, and ecommerce connections.
Constant Contact’s editor is approachable for owners who need to assemble newsletters, promotions, event messages, and announcements quickly. Templates, stock assets, brand tools, and AI writing assistance vary by subscription. The interface generally demands less marketing-operations experience.
Both can produce poor email when a template is overloaded. Use one column for mobile readability, live text instead of image-only messages, meaningful link labels, descriptive alt text, sufficient contrast, and a visible unsubscribe. Send proofs to Gmail, Outlook, and Apple Mail.
Contact management and segmentation
Mailchimp organizes contacts within audiences and supports tags, groups, segments, custom fields, behavioral data, and predictive or advanced features by plan. A common mistake is creating several audiences for groups that should be tags or segments; duplicates across audiences can affect billing and suppressions.
Constant Contact manages lists, tags, segments, and engagement criteria in a simpler structure. It is well suited to member categories, donors, local customers, event attendees, and interest groups. Check how unsubscribed, duplicate, and inactive records count toward the chosen tier.
Before migration, normalize email, consent source, status, timezone, tags, and last engagement. Preserve unsubscribes and complaints. Never re-import a suppressed person as active simply because the CSV lacks the original status column.
Automation
Mailchimp is the stronger automation platform. Marketing Automation Flows can branch or trigger from audience, campaign, website, or ecommerce behavior according to plan and integration. A store can create welcome, abandoned-cart, post-purchase, replenishment, and reactivation journeys.
Constant Contact covers welcome messages, anniversaries, engagement follow-up, resends, and more advanced templates or custom paths at higher tiers. It is enough for a local service business or association with a smaller number of predictable sequences.
Automation limits vary sharply. Mailchimp’s free plan no longer represents the generous automation entry point many old reviews describe. Constant Contact Lite may include only a limited welcome template, while Premium expands templates and segments. Price the exact journey and contact count.
Events, nonprofits, and local businesses
Constant Contact has long served nonprofits, chambers, clubs, and local organizations. Event promotion, registration-oriented workflows, social posting, surveys, and support make it attractive to teams without a specialist. Nonprofit discounts may be available under current terms.
Mailchimp can run event campaigns through landing pages, forms, calendar links, and integrations, but its advantage is deeper audience and commerce marketing rather than dedicated event simplicity. A nonprofit with sophisticated donor segmentation may still prefer Mailchimp or a purpose-built donor CRM connected to an email platform.
Neither should become the authoritative membership, donor, booking, or ticketing database unless its data model meets those needs. Integrate the system of record and define synchronization direction.
Ecommerce and revenue reporting
Mailchimp connects with commerce platforms and can use purchase, product, cart, and customer data for segments, recommendations, automation, and attributed revenue. This makes it a stronger choice for a small online store graduating from broadcast newsletters.
Constant Contact supports ecommerce integrations and promotional campaigns but is less specialized than Klaviyo and generally less automation-rich than Mailchimp. A store should compare product events, catalog sync, refunds, attribution, SMS, and total contact cost.
Attributed revenue is model-dependent. Set one attribution window and reconcile orders with the commerce platform. Do not add claimed revenue from several tools.
Reporting and testing
Both report deliveries, bounces, opens, clicks, unsubscribes, and other campaign activity. Mailchimp offers comparative, journey, ecommerce, and testing depth according to tier. Constant Contact offers engagement reporting, heatmaps and advanced reports on eligible plans.
Apple Mail Privacy Protection inflates opens, while security scanners can trigger links. Focus on delivered messages, filtered unique clicks, replies, registrations, purchases, donations, and unsubscribes. Add UTM parameters and verify site conversions in analytics.
Mailchimp’s A/B and multivariate testing can examine subject, From name, content, or send time based on plan. Constant Contact supports simpler testing and resend patterns. Avoid resending automatically to “non-openers†without accounting for inaccurate open detection and subscriber fatigue.
Deliverability and compliance
Neither platform can guarantee inbox placement. Authenticate the sending domain with SPF, DKIM, and DMARC; use a consistent From identity; remove invalid addresses; honor consent and unsubscribe; and avoid purchased lists. Review Gmail, Yahoo, Microsoft, and regional sender requirements.
Use separate transactional infrastructure when receipts, password resets, or alerts require different reliability and consent. Mailchimp Transactional is a distinct product path; Constant Contact customers may need another service depending on requirements.
Migration test
Build the same welcome series and monthly newsletter in both platforms. Import a sanitized test list with tags and consent fields. Test form submission, double opt-in where used, automation timing, personalization fallback, unsubscribe, suppression, reporting, mobile rendering, and export.
Calculate cost at 500, 2,500, 10,000, and projected three-year contacts. Include send frequency, extra users, SMS, automation tier, overages, migration, and support. Export contacts, campaign results, templates, and automation documentation before deciding.
Verdict
Mailchimp is the better platform for a small business that expects sophisticated segmentation, ecommerce data, and branching journeys. Constant Contact is the better fit for local organizations, nonprofits, and event-oriented teams that value a simpler workflow and accessible support.
Choose Mailchimp when automation depth will be used; choose Constant Contact when consistent campaigns and events matter more than complex journeys. Run the same real campaign in both trials and budget at the expected future list size, not the attractive starting tier.