Omnivery is a transactional email platform (SMTP relay plus REST API) operated by Omnivery s.r.o. in Chrášťany near Prague, Czech Republic. The product is the 2021 relaunch of Mailkit, a Czech email-delivery vendor founded in 2006 by Jakub Olexa (still CEO), and it targets developers and businesses sending transactional and notification email who want an alternative to US-hosted senders such as SendGrid, Mailgun, Postmark, SparkPost and Bird.
Its central differentiator is genuine: unlike most of the category, Omnivery runs its core sending stack on its own physical infrastructure rather than AWS, Azure or Google Cloud, and states it never stores email content. The company holds a stack of ISO certifications issued by the Czech body TAYLLORCOX, including ISO 27001, 27017, 27018 and 27701 (a 7-certificate PDF is published on the site), plus HIPAA readiness and CSA / M3AAWG / Signal Spam memberships. The Data Processing Agreement, privacy policy and sub-processor list are all public and readable without a sales gate, which is a strong transparency signal for the category.
On sovereignty the picture largely holds up, with caveats worth knowing. The vendor confirms (July 2026) that the EU is currently its only data location, that data residency is customer-selectable per sending domain, and that storage can also be on-premise or dedicated to a single customer or domain. The US subsidiary, Omnivery US Inc. (Austin, Texas), is sales-only with no technical access to customer data, and the Google LLC entry in the privacy policy covers Google Analytics on the marketing site rather than the customer data path. The three US-owned sub-processors on the GDPR page (Amazon Web Services, Filestack and Kickbox) serve an optional email-validation feature that is disabled by default and warns before it is enabled, and the vendor says it will move to an EU validation provider. Two things to watch: a US data location is being set up, and the specific EU data-centre country is still not named publicly. Pricing is quote-based with no free tier and no self-serve signup, an intentional anti-abuse measure. Best fit: EU teams that want a non-hyperscaler transactional sender with public compliance docs and can accept enterprise, contact-sales onboarding.