Customer.io review

Customer.io is built for lifecycle and product marketers rather than B2B lead management, which is why it sits last on this list despite a capable feature set. Essentials starts at $100 per month billed monthly for 5,000 profiles and includes 1 million emails a month, a visual workflow builder, cross-channel campaign automation, send-time optimization, API-triggered broadcasts and custom objects with two object types. Push, in-app messages, WhatsApp and webhooks are included, and an AI Agent handles core tasks. Premium starts at $1,000 per month billed yearly and adds custom volumes, 10 object types and HIPAA compliance. The trade-off is that you get the most out of Customer.io only when developers send it event data, and it has no sales CRM or classic lead scoring for handing leads to reps. Startups that raised under $10M can apply for 12 months free.

Who it is for

Product-led companies with developers who can send event data.

Price

From $100 per month billed monthly (Essentials, 5,000 profiles); Premium from $1,000 per month billed yearly.

Essentials starts at $ 100 per month / billed monthly
Quoted from the vendor pricing page on November 6, 2026.

Key features

• Visual workflow builder with cross-channel campaign automation
• Send-time optimization and API-triggered broadcasts
• Custom objects with 2 object types on Essentials
• Transactional email, push, in-app, WhatsApp and webhooks
• AI Agent with core execution skills

Strengths and weaknesses

• Strength: 1 million emails per month on Essentials
• Strength: Event-driven workflows suit product data
• Strength: Startup program offers 12 months free for companies that raised under $10M
• Weakness: Entry price is $100 per month with no free plan
• Weakness: No built-in sales CRM or classic lead scoring
• Weakness: Getting value needs event data from your developers

Key facts

• Essentials: 5,000 profiles, 1 million emails per month
• Premium: From $1,000 per month billed yearly
• Customers: 11,000+ brands, per Customer.io

Where it ranks

Customer.io is No. 10 in our Best Marketing Automation Software verdict.