Omnivery is a security-first transactional email platform for teams whose password resets, 2FA codes, receipts, and confirmations have to arrive โ in the inbox, on time. It provides both an SMTP relay and a REST API natively compatible with the SendGrid v3, Mailgun v3, and SparkPost v1 schemas, so most integrations migrate with no code changes.
Its foundations are unusual for the category. Omnivery runs on 100% owned infrastructure โ no third-party cloud โ and enforces strict sender vetting: every customer and every sending domain is reviewed before activation, there are no free plans, and the result is a clean shared-IP neighbourhood that outperforms dedicated IPs for most senders. Deliverability is handled by senior human analysts who contact you before issues become incidents, not by automated alerts.
On compliance, Omnivery is certified to ISO 27001, ISO 27701, and HIPAA โ a combination unique among transactional providers โ never stores message content, and is operated by an EU company. Native security features include phishing protection, email journaling for litigation defence, and a Bot Detection API that identifies non-human interactions (used by Beehiiv to prevent $2M+/month in ad fraud).
Heritage: 18+ years of deliverability expertise originating with Mailkit (2006, Czech Republic).
A startup from the Czech Republic that is founded by Jakub Olexa, Libor Nรกdvornรญk.
API
SMTP relay and REST API with full feature parity between them
API
Native compatibility with SendGrid v3, Mailgun v3, SparkPost v1 โ one-click migration (suppression lists, bounces, unsubscribes)
Infrastructure
100% owned infrastructure โ no third-party cloud provider
Compliance
Strict sender vetting: every customer and sending domain reviewed; no free plans; clean shared-IP neighbourhood
Deliverability
Proactive human deliverability analysts (24/7 monitoring, reachable by phone) โ not automated alerts
Bot Detection
Bot Detection API: identifies security-scanner clicks, Apple MPP opens, and botnet fraud (20+ datasets, 8+ years)
Security
Phishing protection (blocks unauthorised links, alerts your security team) and email journaling (litigation archive)
Privacy
Never stores message content; metadata retained max 30 days; optional strict-privacy mode anonymises metadata
Data Residency
EU data residency (EU parent, Czech Republic); US infrastructure available for US-based customers
Features
Webhooks, templates, email validation, batch sending
Certifications
ISO 9001, 20000, 22301, 27001, 27017, 27018, 27701 and HIPAA certified
Membership
Certified Senders Alliance, Signal Spam, M3AAWG
Omnivery closes the gaps the incumbents leave on both sides. Against SendGrid, Mailgun, and SES you get owned infrastructure, EU data residency under an EU parent company, the ISO 27001 / 27701 / HIPAA trio, and native bot detection โ none of which they offer together. Against smaller EU alternatives you get 18+ years of deliverability heritage (from Mailkit, founded 2006), a full seven-ISO-plus-HIPAA compliance stack, and CSA and M3AAWG credentials a startup can't match. Migration is low-risk: the REST API is natively compatible with SendGrid v3, Mailgun v3, and SparkPost v1, so most integrations move with a credential swap, and one-click migration carries over suppression lists, bounces, and unsubscribes. Kiwi switched in 45 minutes and saw a 17% click-rate improvement.
Omnivery runs entirely on its own infrastructure โ no third-party cloud provider โ built security-first with support for multiple geographic data-storage regions. Sending is delivered through a high-performance mail transfer agent exposed as both an SMTP relay and a REST API that is natively compatible with the SendGrid v3, Mailgun v3, and SparkPost v1 schemas, with real-time webhooks for delivery events. The Bot Detection API is powered by 20+ proprietary datasets built over 8+ years, combining IP reputation, user-agent analysis, behavioural pattern matching, and honeypot data.
Omnivery grew out of Mailkit, an email platform founded in the Czech Republic in 2006 that became known for deliverability โ "the ones who know how to deliver." Over the years, customers kept asking to use that sending infrastructure directly as an SMTP and API service. Founder and CEO Jakub Olexa saw that most sending services shared the same weakness โ loose abuse controls and weak privacy enforcement dragging down everyone's reputation and deliverability โ so Omnivery was built on the opposite principle: strict sender vetting, no free plans, owned infrastructure, and compliance first. The company was founded in 2021 and the platform launched in May 2022, carrying 18+ years of deliverability heritage.
Omnivery is built for teams that treat email as mission-critical infrastructure and can't afford a password reset, 2FA code, receipt, or booking confirmation to arrive late or land in spam. In practice that means SaaS and product teams, e-commerce and marketplaces, travel and booking platforms, and regulated industries โ financial services, insurance, and healthcare (Omnivery is HIPAA-certified, with BAAs available). It's a particularly strong fit for EU-based or EU-regulated businesses that need GDPR enforced at the infrastructure level, and for utilities, banks, and public-sector bodies running legacy systems that can send via SMTP but can't be rebuilt around a REST API.
Omnivery is a transactional email platform that runs on 100% owned infrastructure โ no third-party cloud โ and admits only vetted senders, so every customer sends from a clean IP neighbourhood rather than a shared pool full of unknown accounts. Three things set it apart from SendGrid, Mailgun, and Amazon SES: it is certified to ISO 27001, ISO 27701, and HIPAA together (a combination no other major transactional provider holds), it never stores message content, and it includes a Bot Detection API that flags security-scanner clicks, Apple MPP opens, and botnet fraud. Deliverability is handled by senior human analysts who reach out before problems become incidents โ not by automated alerts.
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