EmailEngine vs MailerSend
EmailEngine
emailengine.app
MailerSend
mailersend.comSide by side
| Figure | EmailEngine | MailerSend |
|---|---|---|
| Price from | $120.83/mo | $7/mo |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| iOS | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 2 | 5 |
| Spec score · Email APIs | 8.6 (#4) | 9.0 (#1) |
| Compliance | EmailEngine does not come with SOC 2 or ISO 27001 certification; its compliance posture depends on the environment where it is deployed. | The company states that EU data centers hold ISO 27001 and ISO 20000 certifications and that MailerSend follows EU-U.S. and Swiss-U.S. Data Privacy Frameworks. |
| Product | EmailEngine is a self-hosted email API that connects existing Gmail, Microsoft 365 and IMAP mailboxes through a unified REST API. | MailerSend provides transactional email delivery through an email API and SMTP relay. |
| Support | The maker says support goes directly to the developer who wrote the code, and its annual subscription includes developer support. | Official plans provide email support, live chat on higher tiers, priority support and onboarding assistance for Professional customers. |
Plans
EmailEngine
- Annual subscription$1,450 a year
- Enterprise perpetual licencePriced on request
MailerSend
- FreeFree
- Hobby$7 a month
- Starter$35 a month
- Professional$110 a month
- EnterprisePriced 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.
MailerSend
MailerSend delivers transactional email through an email API and SMTP relay. Its editing tools include drag-and-drop, HTML and rich-text editors, along with dynamic templates and split testing. Webhooks, tracking, real-time activity, analytics and suppression-list management support monitoring. Inbound routing can parse replies into application events and route them to an app for further action. Integrations listed include Zapier, Supabase, Firebase, Slack, Laravel, WooCommerce, WordPress, ChatGPT and Claude. The Free plan is free and allows 500 emails per month, 100 daily API requests, one domain and one template. Hobby costs $5.60 a month, billed $67.20 yearly, and includes 5,000 emails per month. The pricing note lists paid plans from $7/mo. A 14-day Professional trial includes 500 emails per month, 100 daily API requests and one day of log retention. MailerSend is available on web, API and iOS; its mobile app is currently only available for iOS. It states that it is GDPR-compliant and hosts services in a certified ISO 27001 data center in Belgium.