JetEmail vs Rspamd

JetEmail combines transactional email delivery, inbound filtering, and email marketing in a web-based platform with API access. Outbound messages can be sent through SMTP or a REST API using the same allowance. The Marketing Suite includes campaigns, templates, segments, custom fields, signup forms, automations, and reporting for opens, clicks, bounces, and unsubscribes. Its free tier does not expire and covers up to 1,000 subscribers with 1 GB of image storage. Paid Marketing Suite plans start at $29 a month for 5,000 subscribers; this Starter tier includes unlimited marketing sends, 100 AI requests per month, and 1 TB of image storage. Inbound filtering can block spam, phishing, and malware, then quarantine or deliver filtered mail by SMTP, webhook, or forwarding. The API supports attachments up to 40 MB, batches of 100, scheduled sends up to 30 days ahead, idempotency keys, and signed delivery webhooks. JetEmail lists integrations for cPanel, DirectAdmin, Enhance, and WordPress, and SDKs for six programming languages. It was founded in 2024 and is based in Australia.

Rspamd is an email security engine for filtering phishing, business email compromise, malicious attachments, and spam. It scores messages using reputation, sender authentication, content analysis, and machine learning. Authentication checks cover SPF, DKIM, DMARC, and ARC; malware scanning can use ClamAV or commercial antivirus engines. Administrators can define custom rules through the Lua API and configurable maps and selectors. Rspamd works with mail transfer agents including Postfix, Exim, and Sendmail, and its ClickHouse and Elasticsearch integrations provide visibility into attack patterns and detection rates. It is designed for gateway deployment and can run on-premises, keeping message data in the operator's environment without a mandatory vendor cloud. The detection engine is open source under Apache 2.0 and is available for Linux, macOS, and self-hosted use. Rspamd says its event-driven C core scans hundreds of messages per second per core and can scale from a single server to billions of messages a day. The open-source engine is listed at free. Scale costs £100 a month, with 5K mailboxes; hosted and enterprise plans have custom pricing. Premium plans offer support from core engineers, with enterprise SLA options.