Maileon is the enterprise email-marketing and marketing-automation platform operated by XQueue GmbH, a German company headquartered in Offenbach am Main with additional offices in Freiburg im Breisgau. Founded in 2002, XQueue has more than 20 years of operating history and serves 3,000+ corporate customers across 10 international offices, with multi-channel capability covering email, SMS, and triggered transactional flows. The platform targets enterprise B2B customers with high-deliverability requirements and explicit DACH / EU public-administration adjacency.
For an EU-sovereignty audit Maileon presents a strong signal profile. The operating entity is a German GmbH; customer email-data is stored in EU (German) data centres only; there is no CLOUD Act exposure. The company holds ISO/IEC 27001 certification plus GDPR alignment, ECO Award membership, ISPA (Internet Service Providers Austria) membership, and CSA (Certified Senders Alliance) trust-seal certification, the standard mid-tier German Mittelstand compliance stack for ESP procurement. Founder-led / privately-controlled with no external VC/PE involvement on record.
Pricing is enterprise / volume-negotiated; specific EUR tiers were not directly captured at audit. Best fit: enterprise B2B marketers in DACH and broader EU markets that want a German-rooted Mailchimp / SendGrid alternative with ISO 27001 + CSA evidence and a 20-year vendor track record. Procurement-grade buyers preferring SMB pricing tiers should look at MailerLite, CleverReach, or rapidmail in the same category.