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Head-to-head · Email Marketing Software

ActiveCampaign vs Customer.io

  • Updated Sep 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score ActiveCampaign #2 in Email Marketing Software 8.8/10 14-day trial ✓ 4 of 4 features Visit ActiveCampaign
Customer.io #21 in Email Marketing Software 5.9/10 From $100/mo · 14-day trial ✓ 1 of 4 features Visit Customer.io

ActiveCampaign leads on 3 checks, Customer.io on 0, and 2 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreActiveCampaign · 8.8/10
  • Most featuresActiveCampaign · 4 of 4

ActiveCampaign scores higher on our rubric for email marketing software: 8.8 against 5.9 out of 10; our editors rank them #2 and #21.

ActiveCampaign offers audience segmentation; Customer.io doesn't publish it. ActiveCampaign offers landing pages; Customer.io doesn't publish it. ActiveCampaign offers a/b testing; Customer.io doesn't publish it.

ActiveCampaign is the better fit for advanced automation and large audiences. Customer.io is the better fit for product-led teams with complex data.

  • ActiveCampaign fits best

    Advanced automation and large audiences

  • Customer.io fits best

    Product-led teams with complex data

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

Side by side

Feature ActiveCampaign 8.8/10 Visit ↗ Customer.io 5.9/10 Visit ↗
At a glance
Editor score 8.8 5.9
Ranking #2 in Email Marketing Software #21 in Email Marketing Software
Best for Advanced automation and large audiences Product-led teams with complex data
Pricing model Paid Paid
Starting price Not published $100/mo
Free plan — —
Free trial — —
Free trial length 14 days · no card needed 14 days · no card needed
Deployment Cloud, Mobile Cloud, Mobile
Platforms Web, iOS, Android Web, iOS, Android
Support Email, Live chat, Community, Docs Email, Live chat, Community, Docs
Compliance SOC 2, GDPR, HIPAA, SSO/SAML, 2FA SOC 2, ISO 27001, GDPR, HIPAA, SSO/SAML, 2FA
Integrations 1,000+ integrations 12 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features ActiveCampaign 4/4 · Customer.io 1/4
Email automation ✓ ✓
Audience segmentation ✓ (best) Not published
Landing pages ✓ (best) Not published
A/B testing ✓ (best) Not published
Specs
Subscriber limit Not published Not published
Monthly send limit Not published Not published
Native integrations 1000 integrations Not published
Our review
Pros
  • Multi-step automation with behavior-based customer journeys
  • Up to 25,000 contacts and 10x contact-limit email sending
  • AI builders, analytics, A/B testing, and 1,000 integrations
  • Deep event-triggered workflows with branching, delays, testing, and goals
  • Multichannel messaging across email, push, SMS, WhatsApp, and webhooks
  • Strong data connectivity through APIs, reverse ETL, and warehouses
Cons
  • No free plan is available
  • Starter includes limited segmentation
  • Pricing varies with contact volume and feature tier
  • Starts at $100 per month with no permanent free plan
  • Premium pricing is $1,000 per month billed annually
  • Advanced capabilities may exceed the needs of simple email campaigns
Our verdict

ActiveCampaign is a paid email marketing and marketing automation platform for small and midsize businesses. It combines email campaigns, newsletters, contact profiles, custom fields, tags, lists, audience segmentation, landing-page…

Read the review →

Customer.io is a customer engagement and marketing automation platform for tech-focused organizations that use first-party data to personalize communication. Its visual workflow builder supports automated campaigns across email, push…

Read the review →
  1. ActiveCampaignEmail Marketing Software 8.814-day trial
  2. Customer.ioEmail Marketing Software 5.9From $100/mo · 14-day trial

Strengths and trade-offs

  • ActiveCampaign — where it wins

    • Multi-step automation with behavior-based customer journeys
    • Up to 25,000 contacts and 10x contact-limit email sending
    • AI builders, analytics, A/B testing, and 1,000 integrations

    Where it doesn't

    • No free plan is available
    • Starter includes limited segmentation
    • Pricing varies with contact volume and feature tier

  • Customer.io — where it wins

    • Deep event-triggered workflows with branching, delays, testing, and goals
    • Multichannel messaging across email, push, SMS, WhatsApp, and webhooks
    • Strong data connectivity through APIs, reverse ETL, and warehouses

    Where it doesn't

    • Starts at $100 per month with no permanent free plan
    • Premium pricing is $1,000 per month billed annually
    • Advanced capabilities may exceed the needs of simple email campaigns

More comparisons

All email marketing software comparisons → · Full ranking →

Guides on email marketing software

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update