Ghost vs Substack
Self-hostable open source versus closed distribution network.
What matters for developers picking email infrastructure
The question here is which one a backend engineer would rather operate. That means SDK depth in the language already in use, whether a retry can safely be replayed, how much the event log tells you when a customer says the email never arrived, and whether the pricing curve stays sane as volume grows.
| Priority | Ghost | Substack |
|---|---|---|
| DX score | 7/10 | 2/10 |
| SDKs | node | None |
| Idempotency keys | No | No |
| Operating since | 2013 | 2017 |
| Event stream | No | No |
| Best published rate per 1,000 | Tiers not published in comparable form | Tiers not published in comparable form |
| Webhooks | Yes | No |
| Deliverability | Depends on the SMTP provider configured (often Mailgun for Pro). | Reasonable for content-driven newsletters. |
| Free tier | Self-hosted is free (your infra cost) | Free, 10% of paid subscriptions |
For a developer-owned stack running password resets, receipts, and magic links shipped from application code, Ghost takes every priority that separates them here (developer experience, SDK breadth, operating track record, and webhook coverage), while Substack matches it on the rest. On free tier, Ghost offers Self-hosted is free (your infra cost) against Free, 10% of paid subscriptions from Substack. That ordering reflects this audience. Weigh the same table differently and the answer changes.
Side by side
| Feature | Ghost | Substack |
|---|---|---|
| DX score | 7/10 | 2/10 |
| SDKs | node | None |
| Webhooks | Yes | No |
| Deliverability | Depends on the SMTP provider configured (often Mailgun for Pro). | Reasonable for content-driven newsletters. |
| Free tier | Self-hosted is free (your infra cost) | Free, 10% of paid subscriptions |
| Tagline | Open-source publishing with built-in memberships and email. | Hosted newsletter platform with social network features. |
| Starts at | Ghost Pro from $9/mo | 10% revenue cut |
| Pricing model | self-hosted | subscriber-based |
| API | Yes | No |
| SMTP | Yes | No |
| Templates | rich | basic |
| React Email | No | No |
| Inbound | No | No |
| Multi-tenant | No | No |
| Idempotency | No | No |
| Dedicated IP | No | No |
| Best for | Independent publishers who want to own their content and stack. | Writers who prioritize distribution over flexibility. |
Ghost
- ›Full ownership in self-hosted mode
- ›Memberships and Stripe integration
- ›Beautiful default themes
- ›Requires another SMTP provider for sending at volume
- ›Heavier than Buttondown for plain newsletters
Substack
- ›Distribution via the Substack network
- ›No platform fees beyond revenue cut
- ›No API, no automation, no custom domain on free
- ›Lock-in to platform