EmailEngine vs Resend Broadcasts
EmailEngine
emailengine.app
Resend Broadcasts
resend.comSide by side
| Figure | EmailEngine | Resend Broadcasts |
|---|---|---|
| Price from | $120.83/mo | $20/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 2 | 7 |
| Spec score · Email APIs | 8.6 (#4) | 8.3 (#10) |
| Headquarters | Tallinn, Estonia | San Francisco, California, United States |
| Security | Stored mailbox credentials and OAuth2 tokens can be encrypted with AES-256-GCM when the deployment’s EENGINE_SECRET key is configured. | Resend says it is SOC 2 Type II and GDPR compliant, encrypts stored data at rest, and uses TLS 1.3 or higher for data in transit. |
| Support | The maker says support goes directly to the developer who wrote the code, and its annual subscription includes developer support. | Resend offers email support with first and next response SLAs and dedicated Slack support for eligible plans. |
| Trial | Each installation can start a full-functionality 14-day trial from its dashboard without signup or a credit card. | Resend says it has no free trial and provides a free-forever plan. |
Plans
EmailEngine
- Annual subscription$1,450 a year
- Enterprise perpetual licencePriced on request
Resend Broadcasts
- FreeFree
- Pro$20 a month
- Scale$90 a month
- FreeFree
- Pro$20 a month
- Scale$90 a month
- CustomPriced on request
In their own words
EmailEngine
EmailEngine is a self-hosted email API that connects Gmail, Microsoft 365, and IMAP mailboxes through a unified REST API. It sends webhooks when mailbox messages or state change, and can send mail through the connected account’s SMTP server or provider API. Native integrations use the Gmail API and Microsoft Graph; authentication options include managed OAuth2, service accounts for Google Workspace, Microsoft 365 app-only access, and shared or delegated mailboxes. An optional MCP server, currently in beta, lets connected AI clients search, read, file, draft, and send email with approved access. The admin interface shows sync status and queue details, with a Prometheus endpoint and Grafana dashboard for operations. EmailEngine runs on the customer’s infrastructure, uses Redis for sync metadata, and fetches message bodies on demand rather than storing them. A server and Redis using the noeviction policy are required. The annual subscription is $1,450 a year, excluding VAT where applicable, and includes developer support; each installation can start a full-functionality 14-day trial without signup or a credit card.
Resend Broadcasts
Resend Broadcasts has no write-up on Specifiction yet; its figures are above.