Open source newsletter platforms tools give teams full code access, no per-user licensing, and the flexibility to self-host — but operational cost replaces license cost. These are the open source options in this category, followed by the full tool list for comparison.
10 tools in this category.
These tools are part of the newsletter platforms category but may not match the open source filter above. Worth reviewing if the primary options don't fit.
Free plan + paid tiers · Cloud · Free trial
Beehiiv is positioned here as a newsletter platform software option for creators comparing workflow fit, output quality, pricing structure, and how much creative effort the product is likely to save after adoption.
Free plan + paid tiers · Cloud · Free trial
AWeber is positioned here as a newsletter platform software option for creators comparing workflow fit, output quality, pricing structure, and how much creative effort the product is likely to save after adoption.
Free plan + paid tiers · Cloud · Free trial
Buttondown is positioned here as a newsletter platform software option for creators comparing workflow fit, output quality, pricing structure, and how much creative effort the product is likely to save after adoption.
Flat monthly fee · Cloud · Free trial
Ghost is positioned here as a newsletter platform software option for creators comparing workflow fit, output quality, pricing structure, and how much creative effort the product is likely to save after adoption.
Free plan + paid tiers · Cloud · Free trial
Kit (ConvertKit) is positioned here as a newsletter platform software option for creators comparing workflow fit, output quality, pricing structure, and how much creative effort the product is likely to save after adoption.
Usage-based pricing · Cloud · Free trial
Loops is positioned here as a newsletter platform software option for creators comparing workflow fit, output quality, pricing structure, and how much creative effort the product is likely to save after adoption.
Free plan + paid tiers · Cloud · Free trial
Mailchimp is positioned here as a newsletter platform software option for creators comparing workflow fit, output quality, pricing structure, and how much creative effort the product is likely to save after adoption.
Free plan + paid tiers · Cloud · Free trial
MailerLite is positioned here as a newsletter platform software option for creators comparing workflow fit, output quality, pricing structure, and how much creative effort the product is likely to save after adoption.
Per-subscriber · Cloud · Free trial
Moosend is positioned here as a newsletter platform software option for creators comparing workflow fit, output quality, pricing structure, and how much creative effort the product is likely to save after adoption.
Freemium · Cloud · Free trial
Substack is positioned here as a newsletter platform software option for creators comparing workflow fit, output quality, pricing structure, and how much creative effort the product is likely to save after adoption.
The license is free, but operational costs (hosting, maintenance, patching, upgrades) replace the vendor's license fee. Teams without dedicated ops resources often spend more on self-managed open source than they would on a managed commercial alternative.
Open source is strongest when you need full code control, on-premises deployment for compliance, or want to avoid vendor lock-in. It's weaker when your team lacks the ops capacity to maintain, patch, and scale the deployment.
Evaluate community activity (commits, issues, releases in the last 6 months), commercial support options, documentation quality, and the total operational burden vs a managed alternative. A dormant project with no commercial backing is a risk.
