ConvertKit (now Kit) is an email-first platform that automates email marketing, newsletter growth, and digital product sales for creators.
Free·from $33/mo
About Customer.io
What is Customer.io?
Customer.io is a customer engagement platform that lets you trigger personalized messages—email, push notifications, SMS, and webhooks—based on real user behavior like sign-ups, cart abandonment, or milestones. It connects to your product data via API or SDK and uses a visual workflow builder to automate campaigns without coding.
Who is it for?
Built for product teams and growth marketers who need behavioral lifecycle campaigns (onboarding, re-engagement, upsell) without heavy developer dependency. Companies with complex user journeys requiring conditional logic and multi-channel messaging will benefit most. It may be overkill for simple newsletter-only broadcasts or very small lists under 500 profiles.
Real use cases
Common uses include: sending a welcome email sequence right after sign-up; triggering a push notification when a trial user hits a key feature milestone; or sending a personalized SMS offer when someone abandons a cart. The AI Agent (beta) can build and optimize campaigns from a simple prompt.
Key features
- Behavioral triggers — Send messages based on any user action or attribute change
- Visual workflow builder — Drag-and-drop conditional paths without coding
- Segmentation engine — Filter users by events, properties, or custom SQL
- A/B testing — Test subject lines, content, timing, and sender names
- Multi-channel — Email, push notifications, SMS, and webhooks from one interface
- Real-time analytics — See open rates, click rates, and conversion per workflow
- AI Agent (beta) — Build campaigns and analyze performance via natural language prompts
SaaSpartout Score
7.6
/10
Editorial score from our review methodology — not user ratings.
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Customer.io Pricing
Customer.io pricing: from $100/mo. Billing model: Freemium.
Essentials — $100/month (billed monthly)
For teams getting started with data-driven messaging. Includes 5,000 profiles, 1 million emails/month, 2 object types, visual workflow builder, AI Agent with core execution skills, LLM actions with 100K credit sample, email and community support, and basic data integrations.
Premium — $1,000/month (billed yearly)
For teams scaling across channels with custom workflows. Includes everything in Essentials plus custom profile & email volume, 10 object types, elevated Agent limits + custom skills, daily routines, premium chat & email support, 90-day onboarding support, HIPAA Compliance, and premium data integrations.
Enterprise — Custom pricing
For organizations needing dedicated infrastructure and support. Includes best pricing on profile & email volume, custom Agent limits + execution skills, priority technical support, migration support, dedicated Success Manager, dedicated hardware, audit logging, and more.
Free trial: 14-day free trial available with no credit card required. Early-stage companies (raised under $10M) may qualify for 12 months free through the Startup Program.
Frequently asked questions
How much does Customer.io cost?
Customer.io Essentials starts at $100 per month (billed monthly) for 5,000 profiles and 1 million emails. Premium starts at $1,000 per month (billed yearly). Enterprise has custom pricing. A 14-day free trial is available with no credit card required.
Is there a free trial for Customer.io?
Yes, Customer.io offers a 14-day free trial with no credit card required. Additionally, early-stage companies that raised under $10M may qualify for 12 months free through the Startup Program.
What is Customer.io used for?
Customer.io is a customer engagement platform used to send automated, behaviorally-triggered messages (email, push, SMS, webhooks) based on user actions in your app. It's used for onboarding, retention, re-engagement, and upsell campaigns.
Who is Customer.io best for?
Customer.io is best for product teams and growth marketers who need advanced behavioral lifecycle campaigns without heavy developer dependency. It suits companies with complex user journeys. It may be overkill for simple newsletter-only broadcasts or very small lists.
What are the main alternatives to Customer.io?
Popular alternatives to Customer.io include Intercom, Braze, Klaviyo, and ActiveCampaign. Each offers different pricing models and feature sets, so compare based on your specific needs around behavioral triggers, multi-channel support, and budget.
Does Customer.io support multi-channel messaging?
Yes, Customer.io supports email, push notifications, SMS, webhooks, and more from a single interface. It also offers integrations with WhatsApp and LINE for additional channel options.
