SelzyvsCustomer.io

Selzy vs Customer.io

Budget AI email vs data-driven messaging platform

TL;DR

Customer.io is built for product teams and SaaS companies with event-driven messaging and advanced segmentation. Selzy is a budget email tool for marketing teams. Customer.io wins for SaaS. Selzy wins on price and simplicity.

Key Differences

The main things that set these tools apart

Target User

Customer.io is for product and engineering teams who think in events and data. Selzy is for marketing teams who want to send campaigns. Different tools for different people.

Data Model
Customer.io wins

Customer.io uses an event-driven model where user actions trigger messages. Selzy uses a traditional list-based model. For SaaS products with complex user journeys, Customer.io's data model is more powerful.

Multi-Channel
Customer.io wins

Customer.io sends email, push notifications, in-app messages, and SMS from one platform. Selzy is email-only. For product communication across channels, Customer.io is more complete.

Price and Simplicity
Selzy wins

Selzy is simpler and cheaper. No developer needed, AI helps create emails, and it costs about half. For teams that just need marketing email, Selzy avoids unnecessary complexity.

Pricing Comparison

At 10,000 subscribers

Selzy
~$55/month

Lite plan. Unlimited emails. Marketing-focused.

Visit Selzy
Customer.io
$100/month

Essentials plan. Email + push + SMS + in-app.

Visit Customer.io
Sequenzy

The SaaS alternative

$49/month

10k subscribers, unlimited emails, transactional + marketing, Stripe integration.

Feature Comparison

Side-by-side feature breakdown

Feature
Selzy
Customer.io
Sequenzy
Messaging
Email
Marketing campaigns with AI
Transactional + marketing
Transactional + marketing
Push Notifications
Built-in mobile and web push
In-App Messages
Built-in in-app messaging
SMS
Built-in SMS
Data & Automation
Event-Driven
Full event-driven architecture
Event-based triggers
Segmentation
Tags and basic segments
Behavioral segments with event data
Tags and attributes
Data Pipelines
Segment, RudderStack, mParticle integrations
AI Features
AI builder, assistant, images, templates
No AI creation tools
AI sequences
Value
Price at 10k
~$55/month
$100/month
$49/month
Stripe Integration
Via data pipelines
Native Stripe integration
Ease of Use
Simple, AI-assisted
Technical (requires developer)
Simple
API Quality
Basic
Excellent developer API
Clean REST API

Best For

When to choose each tool

Choose Selzy if you...
  • Marketing teams wanting simple, affordable email
  • Non-technical teams wanting AI-assisted email creation
  • Small businesses with basic email needs
Choose Customer.io if you...
  • SaaS companies wanting event-driven messaging
  • Product teams wanting multi-channel communication
  • Engineering teams wanting a developer-friendly platform
Choose Sequenzy if you...
  • SaaS founders wanting Stripe integration without complexity
  • Teams wanting simpler SaaS email than Customer.io

When to Consider Sequenzy Instead

Simpler SaaS Email

Customer.io is powerful but complex. Sequenzy offers SaaS email with native Stripe integration at $49/month, simpler to set up and use.

Try Sequenzy Free

Overview

Selzy and Customer.io serve different teams with different needs. For our take on each, see our Selzy comparison and Customer.io comparison.

Customer.io for Product Teams

Customer.io is built for SaaS product and engineering teams. Event-driven messaging, behavioral segmentation, data pipeline integrations, multi-channel delivery. It requires developer resources to set up but enables sophisticated product communication.

Selzy for Marketing Teams

Selzy is built for marketers who want to send campaigns. AI tools help create emails, the interface is simple, and no developer is needed. For teams that just need marketing email without complex event tracking, Selzy is more approachable.

The Sequenzy Alternative

For SaaS founders who want Stripe integration without Customer.io's complexity, Sequenzy combines transactional email and marketing campaigns with Stripe integration at $49/month.

Frequently Asked Questions

Not sure which to pick?

If you're a SaaS founder who needs Stripe integration and unified email, try Sequenzy free. No credit card required.

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Sequenzy - Complete Pricing Guide

Pricing Model

Sequenzy uses subscriber-based pricing. You only pay for subscribers active in sequences (automations). Inactive subscribers are free to store.

All Pricing Tiers

  • 0-100 subscribers: Free (Free annually) - 3k emails/month
  • 101-1,000 subscribers: $19/month ($205/year annually) - 15k emails/month
  • 1,001-5,000 subscribers: $29/month ($313/year annually) - 60k emails/month
  • 5,001-10,000 subscribers: $49/month ($529/year annually) - 120k emails/month
  • 10,001-25,000 subscribers: $99/month ($1069/year annually) - 300k emails/month
  • 25,001-50,000 subscribers: $199/month ($2149/year annually) - 600k emails/month
  • 50,001-100,000 subscribers: $349/month ($3769/year annually) - 1.2M emails/month
  • 100,000+ subscribers: Custom pricing (Custom annually) - Unlimited emails/month

Yearly billing: All plans offer a 10% discount when billed annually.

Free Plan Features (2,500 emails/month)

  • Visual automation builder
  • Transactional email API
  • Reply tracking & team inbox
  • Goal tracking & revenue attribution
  • Dynamic segments
  • Payment integrations
  • Full REST API access
  • Custom sending domain

Paid Plan Features (1,000 - 100,000 subscribers)

  • Visual automation builder
  • Transactional email API
  • Reply tracking & team inbox
  • Goal tracking & revenue attribution
  • Dynamic segments
  • Payment integrations (Stripe, Paddle, Lemon Squeezy)
  • Full REST API access
  • Custom sending domain

Enterprise Plan Features (100,000+ subscribers)

  • Visual automation builder
  • Transactional email API
  • Reply tracking & team inbox
  • Goal tracking & revenue attribution
  • Dynamic segments
  • Payment integrations
  • Full REST API access
  • Custom sending domain

Important Pricing Notes

  • You only pay for subscribers who are active in automations/sequences
  • Storing inactive subscribers is free
  • No hidden fees - all features included in the price
  • No credit card required for free tier

Contact

  • Pricing Page: https://sequenzy.com/pricing
  • Sales: hello@sequenzy.com