beehiiv vs Customer.io

beehiiv is a newsletter platform founded by former Morning Brew engineers, including CEO Tyler Denk, to give independent publishers the growth tooling that helped Morning Brew scale. It handles writing, sending, hosting and monetizing a newsletter in one place, and has grown quickly since its public launch in 2022.

Every publication gets a visual editor with polls and surveys, a hosted website with SEO-friendly archives and custom domains, segmentation and analytics. The free plan covers up to 2,500 subscribers with unlimited sends. The paid Lite plan, priced by list size, unlocks the features that matter for growth: a referral program, Boosts (paid recommendations from other newsletters), the beehiiv Ad Network, paid subscriptions through Stripe, automations and A/B tests. Pro removes beehiiv branding and adds webinars and advanced analytics, and Enterprise adds dedicated IPs and SLAs.

beehiiv suits media-style newsletters, niche publications and journalists who treat the newsletter as the business. Its referral and ad network features have no real equal among email tools. It is not built for e-commerce lifecycle marketing (Klaviyo), creators selling courses and digital products (Kit), or SaaS product email (Customer.io). Substack is the main alternative for writers who value its network effects more than control over branding and monetization.

Over 2024 and 2025 beehiiv kept expanding beyond email with a richer website builder and AI writing tools, positioning itself as a full publishing platform.

Customer.io is a customer engagement platform founded in 2012 that sends automated messages based on what users actually do in a product. Instead of scheduled newsletters, teams send events and attributes from their app, and Customer.io triggers email, push notifications, in-app messages, SMS or webhooks when someone signs up, stalls in onboarding or stops using a feature.

The visual journey builder supports branches, waits, A/B tests, goals and exit conditions, and segments update in real time. Data Pipelines works as a built-in customer data platform that collects events and forwards them to other tools, and warehouse sync can pull audiences from Snowflake, BigQuery and similar stores. A transactional API covers receipts and password resets with the same templates. The Essentials plan starts at 100 dollars a month for 5,000 profiles; Premium and Enterprise add more workspaces, HIPAA support, dedicated IPs and services.

Customer.io fits product-led SaaS companies and mobile apps that have event data and engineers to send it. Teams sending simple newsletters to small lists pay more than they need to and will find MailerLite, Kit or Loops simpler. At the high end, Braze and Iterable offer more enterprise services and scale. The 2022 acquisition of Parcel, an email coding tool, strengthened its email design workflow, which had long been its weaker side.