Klaviyo vs Listmonk
Klaviyo and Listmonk are both email marketing software. Klaviyo is a commercial product from Klaviyo. Listmonk is open source under AGPL-3.0, with 24k GitHub stars.
Which to pick
- Pick Klaviyo when
- A Shopify or other online store wants purchase-driven email and SMS marketing.
- Pick Listmonk when
- You send newsletters to large lists and want to pay only for SMTP or SES instead of per-subscriber pricing.
Side by side
Email and SMS marketing for e-commerce, using store purchase data for segmentation, flows like abandoned cart, and revenue attribution.
A self-hosted newsletter and mailing list manager in a single Go binary with PostgreSQL, handling lists, campaigns, templates, analytics and transactional mail.
Costs rise steeply with list size because billing counts active profiles.
You handle deliverability, bounces and sending reputation yourself; the newest line is in beta.
Production-ready (both)
Cloud service and mobile app
Self-hosted server
Not published
Go, Vue and PostgreSQL
Closed source, sold by Klaviyo
Open source, AGPL-3.0 (network copyleft)
Closed source: you use it under the maker's terms and cannot change or resell the code.
Use inside your business is unrestricted. If you change it and let customers use it over the internet, you must publish your changes.
839 Wikipedia readers a month on phones
24k GitHub stars
Not known
Established: started 7 years ago, latest release v7.0.0-beta.1.
Other comparisons
More email marketing and newsletter software
Both sides were judged on 2026-11-03 from makers' descriptions, Wikipedia, READMEs and GitHub data. License, age and popularity lines are worked out directly.