Keila vs Klaviyo
Keila and Klaviyo are both email marketing software. Keila is open source under AGPL-3.0, with 2.3k GitHub stars. Klaviyo is a commercial product from Klaviyo.
Which to pick
- Pick Keila when
- You want a simple self-hosted or EU-hosted alternative to Mailchimp for newsletters.
- Pick Klaviyo when
- A Shopify or other online store wants purchase-driven email and SMS marketing.
Side by side
A newsletter tool for managing contacts, signup forms and campaigns, sending through SMTP, SES, Sendgrid or Mailgun.
Email and SMS marketing for e-commerce, using store purchase data for segmentation, flows like abandoned cart, and revenue attribution.
Pre-1.0, with a small team and fewer automation features than commercial tools.
Costs rise steeply with list size because billing counts active profiles.
Usable
Production-ready
Self-hosted server and cloud service
Cloud service and mobile app
Elixir, Phoenix and PostgreSQL
Not published
Open source, AGPL-3.0 (network copyleft)
Closed source, sold by Klaviyo
Use inside your business is unrestricted. If you change it and let customers use it over the internet, you must publish your changes.
Closed source: you use it under the maker's terms and cannot change or resell the code.
2.3k GitHub stars
839 Wikipedia readers a month on phones
Established: started 5 years ago, latest release 0.40.1.
Not known
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.