EmailEngine vs MailParse

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.

MailParse receives inbound email and converts MIME messages into structured JSON. It extracts text and HTML bodies, inline images, attachments, headers, and routing details, including nested and multipart messages. Parsed results can be sent by POST to a configured webhook, with exponential-backoff retries and HMAC signature verification, or retrieved through a REST polling API. Polling supports filters for sender, date range, subject, and attachment type, with cursor-based pagination. SPF, DKIM, and DMARC validation, spam scoring, and per-address rules support message handling. Attachments use signed download URLs and are retained for 72 hours by default, with plan-based retention settings. Custom domains require an MX record and ownership verification. If a webhook is unavailable, retries continue for up to 24 hours, with replay and polling recovery. MailParse offers API and web access. Free includes 100 emails monthly; Pro costs $29 per month and Scale $99 per month.