Ghost vs Substack
Self-hostable open source versus closed distribution network.
What matters for SaaS product teams
A SaaS product sends on behalf of its customers, so the deciding factors are tenant isolation, whether suppressions can be scoped rather than global, and whether support can answer why one specific account did not receive one specific email. Lifecycle automation and transactional sending usually need to coexist.
| Priority | Ghost | Substack |
|---|---|---|
| Multi-tenant | No | No |
| Event stream | No | No |
| Suppressions API | Yes | Yes |
| Operating since | 2013 | 2017 |
| Scheduling | Yes | Yes |
| Best published rate per 1,000 | Tiers not published in comparable form | Tiers not published in comparable form |
| Deliverability | Depends on the SMTP provider configured (often Mailgun for Pro). | Reasonable for content-driven newsletters. |
| Webhooks | Yes | No |
| Starts at | Ghost Pro from $9/mo | 10% revenue cut |
For a multi-tenant SaaS product running trial expiry notices, dunning, onboarding sequences, and per-tenant transactional mail, Ghost takes every priority that separates them here (operating track record and webhook coverage), while Substack matches it on the rest. On entry price, Ghost offers Ghost Pro from $9/mo against 10% revenue cut from Substack. That ordering reflects this audience. Weigh the same table differently and the answer changes.
Side by side
| Feature | Ghost | Substack |
|---|---|---|
| Multi-tenant | No | No |
| Deliverability | Depends on the SMTP provider configured (often Mailgun for Pro). | Reasonable for content-driven newsletters. |
| Webhooks | Yes | No |
| Starts at | Ghost Pro from $9/mo | 10% revenue cut |
| Tagline | Open-source publishing with built-in memberships and email. | Hosted newsletter platform with social network features. |
| Free tier | Self-hosted is free (your infra cost) | Free, 10% of paid subscriptions |
| Pricing model | self-hosted | subscriber-based |
| API | Yes | No |
| SMTP | Yes | No |
| SDKs | node | None |
| Templates | rich | basic |
| React Email | No | No |
| Inbound | No | No |
| Idempotency | No | No |
| Dedicated IP | No | No |
| DX score | 7/10 | 2/10 |
| 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