How to Choose a Marketing Automation Platform

A guide to selecting the right marketing automation tool for email campaigns, drip sequences, and lead nurturing. Covers pricing traps, list management, and how to avoid paying enterprise prices for startup-stage needs.

Key Decision Criteria

Contact-Based vs. Email-Based Pricing

High Priority

HubSpot and ActiveCampaign charge based on contacts — every contact in your database counts whether you email them or not. Brevo (formerly Sendinblue) charges based on emails sent, making it dramatically cheaper if you have a large list but send infrequently. Mailchimp recently shifted to contact-based pricing and charges for unsubscribed contacts unless you archive them.

Automation Complexity

High Priority

Mailchimp offers basic automation (welcome series, abandoned cart). ActiveCampaign provides the most sophisticated visual automation builder with conditional logic, scoring, and CRM integration. HubSpot's automation is powerful but locked behind Marketing Hub Professional at $890/month. Match the tool to your actual automation needs, not aspirational ones.

Native CRM Integration

Medium Priority

HubSpot's biggest advantage is its built-in CRM — marketing and sales data live in one system. ActiveCampaign includes a lightweight CRM. Mailchimp and Brevo require integrations with external CRMs. If you need marketing and sales alignment, a native CRM eliminates data sync headaches.

Questions to Ask Yourself

How many contacts are in your marketing database?

Under 500: Most free tiers cover you. HubSpot free includes email marketing for up to 1,000 contacts. Mailchimp's free plan was discontinued — their starter is $13/month for 500 contacts. 500-10,000: Pricing differences become real. Brevo at $25/month gives unlimited contacts with 20K emails/month. Mailchimp charges $100+/month for 10K contacts. Over 10,000: Brevo's email-based pricing is often 3-5x cheaper than contact-based tools at this scale.

What types of automation do you actually need today?

Welcome emails and newsletters: Any tool handles this. Mailchimp or Brevo at their lowest tiers work fine. Multi-step drip campaigns with branching logic: ActiveCampaign's automation builder is the most capable for the price ($29/month for 1,000 contacts). Lead scoring and lifecycle management: HubSpot Marketing Hub Starter ($20/month) for basic, Professional ($890/month) for advanced. Be honest about what you need now versus what you imagine needing later.

Do you need transactional email alongside marketing email?

If you send both marketing emails and transactional emails (order confirmations, password resets), Brevo handles both on one platform with a shared sending infrastructure. Mailchimp's transactional email (Mandrill) is a paid add-on. HubSpot's transactional email requires the Marketing Hub Professional plan. Separating marketing and transactional email is also valid — many startups use Brevo or Postmark for transactional and a different tool for marketing.

Red Flags to Watch For

Paying HubSpot Marketing Hub Professional prices at pre-revenue stage

HubSpot Marketing Hub Professional costs $890/month with a $3,000 onboarding fee. At early stage, you don't need advanced automation, ABM tools, or custom reporting. Start with HubSpot's free tier or Starter ($20/month), ActiveCampaign ($29/month), or Brevo ($25/month) and upgrade when your revenue justifies enterprise tooling.

Ignoring deliverability when switching platforms

Every email platform has a different sending reputation. When you migrate from Mailchimp to ActiveCampaign, your deliverability resets. Warm your new sending domain gradually — start with your most engaged contacts and scale over 2-4 weeks. A mass blast to your full list on day one from a new platform will hurt inbox placement.

Accumulating unsubscribed and bounced contacts on contact-priced plans

Mailchimp and HubSpot count unsubscribed contacts toward your billing tier unless you actively archive or delete them. A 10,000-contact plan where 3,000 are unsubscribed means you're paying 30% more than necessary. Clean your list quarterly and archive anyone who hasn't engaged in 6+ months.