UniOne Email API

5.0 (5 Reviews)|Write a Review|Claimed profile
Cyprus HQFounded 2012

Deployment

Overview

About UniOne Email API

UniOne main (but not all) features:

- Free trial to thoroughly study the service before purchasing it;
- Fair pricing without overpaying;
- 24/7 friendly responsive support via chat and email with no extra fee;
- Amazing sending speed of thousands of outgoing emails per second;
- Dedicated IPs for your needs;
- Drag-n-drop email template editor;
- Detailed statistics;
- GDPR compliance.

UniOne is made by a team of true enthusiasts who continuously improve the service to meet all the goals and needs of its users.

At a glance

Software information

Industries served, licensing and the support UniOne Email API provides.

Industries

  • Airlines-aviation
  • Banking
  • Commercial-real-estate
  • E-learning
  • Entertainment
  • Gambling-casinos

Licensing

  • Proprietary
  • Monthly Payment
  • Free trial
  • Free version

Support

  • Email
  • Live Chat
  • 24x7 Support

Training

  • Documentation
Languages (3)
EnglishRussianUkrainian

Review analytics

What customers report

5.0
Based on 5 verified reviews
Ease of use4.8
Features & functionality5.0
Customer support5.0

What users like the most

  • The reliability and deliverability of the emails sent through UniOne have been consistently impressive. The detailed statistics provided by UniOne have been invaluable in tracking and analyzing the performance of the sent emails. Furthermore, the flexibility of UniOne has allowed us to cater to various client requirements. Whether sending transactional emails, notifications, or welcome campaigns, UniOne has proven to be a versatile tool that meets our diverse needs.
  • Getting started is effortless, as there are no lengthy submission forms to fill out. The registration process is swift and straightforward, allowing you to get up and running in no time. Additionally, the team behind the service is highly responsive, promptly addressing any inquiries or concerns you may have.
  • One of the standout features of UniOne Email SMTP API is its exceptional reliability and performance. Our users have consistently praised the speed and efficiency with which their email signatures are generated and deployed. The API's robust infrastructure ensures minimal downtime and rapid response times, contributing to a seamless user experience.

What users like the least

  • When you lack access to the customer's sending domain, verifying it can pose challenges. Therefore, having a feature enabling testing email sending without relying on the customer's domain would be highly advantageous. This capability simplifies the process and offers valuable benefits in ensuring a smooth integration.
  • The integration process may pose a challenge for individuals without programming expertise, particularly if they lack a developer on their team. However, the process should not be overly complicated for those familiar with API functionality and its workings.
  • While UniOne Email SMTP API offers extensive customization options, harnessing its full potential may require a moderate learning curve for developers unfamiliar with the intricacies of email signature creation and SMTP integration. However, the comprehensive documentation and support resources provided mitigate this challenge, enabling developers to quickly overcome any hurdles and leverage the API's capabilities effectively.

What users say

Review Analytics of UniOne Email API

Every review is verified through Goodfirms before it's published.

5.05 Verified Reviews
Ease of use4.8
Features & functionality5.0
Customer support5.0
Review Summary
Summarized from 5 verified reviews · Updated September 2026
UniOne Email API is praised for its straightforward integration process and clear documentation that developers find easy to implement. Users consistently highlight its reliability for email delivery, affordable pricing with trial options, and responsive customer support during onboarding. The platform effectively handles diverse use cases from transactional emails to product announcements. Some reviewers noted initial documentation questions, though support assistance resolved these concerns quickly.
✦ AI-generated summary. May not reflect every review.
Detailed Reviews of UniOne Email API
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What reviewers mention most

Sergei Slizh, CMO at DashlyVerified Review
Posted on Jan 29, 2025

“Enhances Communication Efficiency”

Overall rating5.0
Ease of use5.0
Features & functionality5.0
Customer support5.0
A dependable tool for improving audience engagement through email. It has helped us manage product launch announcements seamlessly. And the best part is that we never had any email deliverability issues.
Natalia Zakutynska, Business assintant at NewoldstampVerified Review
Posted on Feb 27, 2024

“Streamlining Email Signatures with UniOne Email SMTP API”

Overall rating5.0
Ease of use5.0
Features & functionality5.0
Customer support5.0
Being behind a cutting-edge product for creating email signatures, I've had the opportunity to explore various solutions to enhance our offering. Among the array of options available, integrating UniOne Email SMTP API has been a transformative experience, offering a seamless solution that has significantly improved our product's functionality and user experience.
Alexey Shapran, CEO at PioGroup Software — Experts in EdTech software developmentVerified Review
Posted on Feb 27, 2024

“UniOne Email API: Streamlining Education Notifications”

Overall rating5.0
Ease of use4.0
Features & functionality5.0
Customer support5.0
Overall, UniOne Email API proved to be a reliable tool for delivering crucial educational notifications, despite some initial hurdles. We totally like this tool and its functionality!
Valeria Raznatovska, Chief Storyteller at SOLVVerified Review
Posted on Sep 26, 2023

“Effortless Email API Integration”

Overall rating5.0
Ease of use5.0
Features & functionality5.0
Customer support5.0

Our overall experience using the UniOne Email API has been exceptional as a digital agency. It has proven a reliable and efficient solution for handling our customers' email communication needs. The integration process was smooth and straightforward, allowing us to quickly incorporate the API into the customers' systems. One of the standout features of UniOne is its ease of use. The API documentation provided clear and comprehensive guidelines, making it easy for our developers to understand and implement the necessary code. We appreciated the intuitive user interface that UniOne offers, which made managing and monitoring our email activities a breeze.

Serhiy Bohush, CMO at UniTalkVerified Review
Posted on Jul 3, 2023

“Almost free Email API”

Overall rating5.0
Ease of use5.0
Features & functionality5.0
Customer support5.0
We are upgrading the method for delivering invoices and receipts to our customers. In our search for an affordable (preferably free) email delivery solution that can be easily integrated, UniOne caught our attention with its enticing 4-month trial offer. Currently, we are in the process of testing its functionality and performance. Although we encountered some questions regarding the documentation, the onboarding experience was satisfactory, mainly due to the assistance provided by their customer support team. We will continue monitoring the progress to evaluate its effectiveness. Thus far, the quality of service and pricing structure appear promising.

Capabilities

UniOne Email API features

The full feature set, grouped by module.

Email Management Software

  • Email Monitoring
  • Whitelisting/Blacklisting

Plans

UniOne Email API pricing

Free Version
Yes
Payment Frequency
Monthly Payment
Preferred Currency
USD ($)
Free Trial
30plus Days

Works with

Integrations

UniOne Email API connects with the tools your team already uses.

Media

Screenshots & video

Executive Interview

Executive Interview of UniOne Email API

Alex Kachalov
Alex Kachalov
CTO & Co-founder
Visit Profile

Kindly share your feedback on how GoodFirms has been doing so far in increasing your visibility among potential clients.

As it’s just a few months since our listing on GoodFirms, it is too soon to say about any drastic visibility increase. However, we already see some referred visits to our website and hope their number will continuously grow. Also, we may say that the GoodFirms’ team is very responsive and does its best to provide excellent service and possible improvements to our visibility.

Please introduce your product and give a brief about your role within the organization.

Our UniOne product is purposed for effortless and cost-effective mass email sending via API or SMTP. Its purpose is to help businesses of all sizes to land their transactional and marketing emails in inboxes. Being easily embeddable into any web or app, UniOne thoroughly cares about sending speed and deliverability level. Meanwhile, owners and managers can focus on scaling their businesses.

My role in the company is mostly about finding new ways and features to improve the experience our customers get from interacting with our product. Since we want to be real friends to our users and satisfy all their crucial needs, we are trying to listen to their additional desires and predict them.

What was the objective behind coming up with this software?

Ten years before developing UniOne, we were evolving another product - a more complex email marketing platform. This product prospered in the CIS market and is still growing worldwide as Selzy. It provides a full range of tools for successful email marketing - email builder, contact list management, A/B testing, trigger scenarios, etc. And the more it grew, the more its customers’ needs grew. Thus, one of the largest clients with millions of users decided to make interaction with them more efficient. So they decided to try using a customer development platform (CDP). Still, there stayed a need for a reliable solution for email communication with their audience. Plus, they already had a trusted partner in this field. So we decided to follow their need and make an email transport with fewer “marketing” features but more speed and attractive pricing. It was also expected to be easily integrated with any other IT system to deliver emails by request. And that is how UniOne appeared with its powerful set of APIs. Later, we added SMTP integration to widen our audience and began developing new features to make it more useful.

How is your software beneficial from a value addition perspective to the clients compared to other software alternatives available in the market?

Our clients always stated that our main advantage was in our customer support. When we started, we were the only service in this field providing responsive 24/7 technical support for everyone, free of charge. Our expertise helped customers start email marketing with the lowest effort. We tried to make our product so easy to use that the companies didn't need to hire specific specialists to deal with it. So, businesses could save money. Besides, UniOne's pricing was the most competitive in the market from the start. And that's made our customers' ROMIs increase more and more rapidly.

What industries do you generally cater to? Which industries in general are highly benefiting by using your software?

Actually, we don’t limit ourselves to catering to specific industries. You know, nowadays, emails are used in almost every business, which is presented online. Thus, anybody can be UniOne’s customer. If defining niches in which we have many clients, I can name e-commerce, e-learning, fintech, ticketing, gambling (responsible only), and related.

What are the key features of your software that makes it stand apart from your competitor products in the market?

The main feature, I suppose, is that we do really care about what our customers actually need. As I mentioned, we are constantly improving our product depending on which extra features our users want. Among them, I can specify a drag-and-drop email builder with ready-to-use templates, which makes creating first notifications easier. We also provide analytic reports with dashboards and an option to export them in CSV files. Another helpful option is dedicated IPs with an automated warm-up and user management. Plus, we allow making independent projects to differentiate sending. It is a popular feature among big enterprises and those who want to use UniOne as a white-label solution (which is also possible). One of the newest - is the tag management for effortless tracking email campaigns, and we have many, many more...

What is the customer satisfaction rate according to you? What steps do you take to cater to your customer’s needs and requirements?

Due to the questionnaires, our customers fill out after chatting with our support team, their satisfaction level is about 4,5 out of 5. As we appreciate any feedback our clients can provide, we thoroughly collect their ideas on what we may improve. After that, we put the most common suggestions in our backlog for further implementation. This year,  we also want to do more profound research on what our users think about us to figure out the next steps we should take to meet their expectations.

Are your customers repetitive? If yes, what is the percentage of repeat customers that you have?

Yes, most of our customers are repetitive, and we work based on a subscription model. But, of course, nobody is perfect, and honestly, not 100% of our newly subscribed users stay with us. Usually, among all who tried our service for at least 4 months and realized it fits their needs, about 80% continue partnering with us.

Does your software product provide any resource or knowledge section for its users? If yes, what kind of material is provided to your users to help them get acquainted with your product?

Yes, we have a primary “Knowledge Base” describing all the main features. Also, we provide complete API documentation, which we are trying to make as straightforward as possible. Plus, even though users can’t find the needed information themselves, our customer support is always at their service.

What kind of support system do you offer to your clients for catering to their queries and issues?

We provide 24/7 technical support available in chat and via email. Also, our customers can get a dedicated team to solve their queries and obtain specific expertise help in their email delivery for an extra cost.

What has been the revenue for your product for 2022?

$300K+

Where do you see your product in the next 10 years?

We’d like to become as famous as the “giants” like Mailgun and Sendgrid staying friendly and customer-oriented at the same time ;)