Software Alternatives, Accelerators & Startups

IzzyOnDroid VS Omnivery

Compare IzzyOnDroid VS Omnivery and see what are their differences

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IzzyOnDroid logo IzzyOnDroid

This is a repository of apps to be used with F-Droid.

Omnivery logo Omnivery

Security-first transactional email: SMTP relay and REST API for password resets, receipts, 2FA and notifications. 100% owned infrastructure, strict sender vetting, human deliverability, ISO 27001/27701/HIPAA, native SendGrid/Mailgun compatibility.
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  • IzzyOnDroid Landing page
    Landing page //
    2022-10-02
  • Omnivery Dashboard
    Dashboard //
    2026-07-10

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 offers data residency in the EU or US. Native security features include phishing protection, email journaling for litigation defence, and a Bot Detection API that identifies non-human interactions.

Heritage: 18+ years of deliverability expertise originating with Mailkit (2006, Czech Republic).

Omnivery

$ Details
paid
Platforms
REST API SMTP Web Webhooks
Release Date
2022 May
Startup details
Country
Czech Republic
Founder(s)
Jakub Olexa, Libor Nรกdvornรญk
Employees
1 - 9

IzzyOnDroid features and specs

  • Open Source
    IzzyOnDroid hosts open-source applications, which promotes transparency and allows users to verify the security and integrity of the apps.
  • Alternative App Source
    Provides an alternative to mainstream app stores, potentially offering apps not available elsewhere.
  • Privacy-Focused
    By curating apps that respect user privacy, the repository appeals to users concerned about data security.
  • Frequent Updates
    Apps on IzzyOnDroid are often updated, ensuring users have access to the latest features and security patches.
  • No Tracking
    IzzyOnDroid's repository itself does not track users, maintaining a commitment to privacy beyond just the apps.

Possible disadvantages of IzzyOnDroid

  • Limited Selection
    Compared to larger app stores, IzzyOnDroid offers a smaller range of apps, which might not fulfill all user needs.
  • Potential Security Risks
    Although the apps are open source, users still need to ensure the apps they download are safe and reputable.
  • User Responsibility
    Being an alternative repository, users are more responsible for verifying the safety and legality of the applications.
  • App Stability
    Some apps may not be as stable or well-supported, as they are developed by independent developers and open-source contributors.
  • Requires F-Droid Client
    To access IzzyOnDroid apps, users typically need to use the F-Droid client, which might be unfamiliar to some users.

Omnivery features and specs

  • 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

Analysis of Omnivery

Overall verdict

  • I don't have verified information about Omnivery (omnivery.com) in my knowledge base, so I can't confirm what the product does or assess its quality, pricing, or reputation. I'd recommend researching directly through the website, checking independent reviews (e.g., Trustpilot, G2, Capterra), and looking for user feedback on forums or social media before making a decision.

Why this product is good

  • No verified data available on this specific product/service to confirm its features or performance
  • Unable to confirm legitimacy, pricing, or customer satisfaction without direct research
  • Recommend checking the official website for detailed product information
  • Look for third-party reviews and ratings to gauge real user experiences

Recommended for

  • Anyone considering this service should first verify details directly via the official website
  • Users who can find and review third-party ratings or testimonials before committing
  • Those comfortable doing independent due diligence when information is limited

IzzyOnDroid videos

No IzzyOnDroid videos yet. You could help us improve this page by suggesting one.

Add video

Omnivery videos

Jakub Olexa, Founder and CEO of Mailkit and Omnivery, discusses Non-Human Interactions (NHI) in e...

More videos:

  • Review - Battle of the Bots with Mariska Calabrese, beehiiv & Jakub Alexa, Omnivery

Category Popularity

0-100% (relative to IzzyOnDroid and Omnivery)
App Store
100 100%
0% 0
Transactional Email
0 0%
100% 100
Mobile Apps
100 100%
0% 0
Email Delivery
0 0%
100% 100

Questions & Answers

As answered by people managing IzzyOnDroid and Omnivery.

Who are some of the biggest customers of your product?

Omnivery's answer:

  • Kiwi.com
  • Notino
  • ฤŒSOB
  • Beehiiv
  • Rouvy
  • TrueML
  • TV Nova
  • TV Markรญza
  • Ohne-Makler
  • Upland (Adestra)
  • Cruxo

Why should a person choose your product over its competitors?

Omnivery's answer:

Omnivery closes the gaps the major providers leave. Against SendGrid, Mailgun, and Amazon SES you get 100% owned infrastructure (no third-party cloud), the ISO 27001 / 27701 / HIPAA trio, native bot detection, and deliverability run by senior human analysts rather than automated alerts โ€” a combination none of them offer together. 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. And with data residency available in both the EU and US, teams with regional compliance requirements are covered either way.

Which are the primary technologies used for building your product?

Omnivery's answer:

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.

What's the story behind your product?

Omnivery's answer:

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.

What makes your product unique?

Omnivery's answer:

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.

How would you describe the primary audience of your product?

Omnivery's answer:

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 regulated and privacy-sensitive teams that need compliance enforced at the infrastructure level โ€” with data residency available in the EU or US โ€” 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.

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare IzzyOnDroid and Omnivery

IzzyOnDroid Reviews

We have no reviews of IzzyOnDroid yet.
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Omnivery Reviews

  1. Kazimir Krysta
    ยท CTO & Partner at Webscale ยท
    State of the art service

    As an email marketing agency we've been using Omnivery for our clients for several years now and their proactive support never case to amaze us. We're sending through Omnivery apprx. 250 mio. emails / year. Excellent service in every way, highly recommended

    ๐Ÿ Competitors: Bird, Mailgun, Twilio
    ๐Ÿ‘ Pros:    High email deliverability|Excellent support|Secure and easy to use|Bot detection
  2. Raja Datta
    ยท Senior Manager, Channel Operations at TrueML ยท
    Wonderful ESP with so much value

    I've been using Omnivery for a little over a year now, and the platform has continued to evolve in ways that have helped take our email program to the next level. One of the biggest differentiators is its ability to identify and report true human clicks while filtering out bot activityโ€”something I haven't seen by other providers.

    Beyond the technology, the partnership has been outstanding. Whenever we've needed enhancements or had new ideas, the Omnivery team has been open to feedback, collaborative, and quick to work with us on solutions. Having an additional set of experienced eyes reviewing our program week after week has been incredibly valuable.

    I truly appreciate the partnership and look forward to continuing to work with Omnivery for years to come.

    ๐Ÿ Competitors: Sparkpost, netcore

Social recommendations and mentions

Based on our record, IzzyOnDroid seems to be more popular. It has been mentiond 12 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

IzzyOnDroid mentions (12)

  • GitDroid: A third party Android app manager for apps uploaded to GitHub releases
    As also pointed out in a sibling thread, there's https://apt.izzysoft.de/fdroid/ though, which is somebody's curated collection of apps with Github releases in the form of an F-Droid repository. - Source: Hacker News / over 1 year ago
  • What are the popular foss apps which are not on fdroid?
    Some FLOSS apps not available in the official F-Droid repo are hosted in IzzyOnDroid repo, compatible with all F-Droid clients. Source: about 3 years ago
  • What is your favorite method of downloading FOSS apps?
    One of the larger ones would by IzzyOnDroid - https://apt.izzysoft.de/fdroid/ - apps are built by the individual app developer and then may available here. Source: over 3 years ago
  • Similar app suggestion after opening an app?
    Also if you want more FLOSS apps in your client, you might add the IzzyOnDroid repo to your F-Droid client. It serves FLOSS apps that include some non floss components (so the apps are not 100% FLOSS). Source: over 3 years ago
  • My New Favorite Launcher
    Just checked, the neo launcher I use is not on the play store, although there is some other "neo launcher hyperion", thats not what I meant. If you want to try it out, you'll have to get the apk directly from their github (https://github.com/NeoApplications/Neo-Launcher) or get the F-Droid store & activate the IzzyOnDroid repo (https://apt.izzysoft.de/fdroid/). Source: over 3 years ago
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Omnivery mentions (0)

We have not tracked any mentions of Omnivery yet. Tracking of Omnivery recommendations started around Jul 2026.

What are some alternatives?

When comparing IzzyOnDroid and Omnivery, you can also consider the following products

F-Droid - F-Droid is an interesting alternative for Android users who want to try something different and not have to use the Goole Play store all the time.

Mailgun - A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.

Aurora Store - Aurora is a FOSS Play Store client that does not require a Google Account to download directly from Play Store. However you can login with your Google Account to download your already paid apps!

SendGrid Email API - You can use SendGrid via SMTP or our simple to use Web API. Understand how best to utilize SendGrid.

Obtainium - Get Android App Updates Directly From the Source.

Sparkpost - Deliver your app and website emails on time and to the inbox. Trusted to send 25% of the world's non-spam email. Email delivery for companies big and small.