UniOne Email API
UniOne Email API is a Cyprus-headquartered, developer-focused email delivery platform providing transactional and marketing email via REST API and SMTP, priced at $0.07-$0.22 per 1,000 emails and serving SMBs, SaaS, e-commerce, and healthcare customers worldwide.
- Company typePrivate
- Founded2018
- HeadquartersPaphos, Cyprus
- Headcount1–10
- GTM typeB2B
- OfferingSoftware
What UniOne Email API does
UniOne Email API is a developer-focused email delivery platform operated by ECOMZ HOLDING LIMITED, a Cyprus-registered private company founded in 2018 with a US licensee (UNITHING CORP., Delaware) and a New York regional office alongside its Cyprus headquarters. The platform provides transactional and marketing email delivery through a REST Web API and an SMTP relay, with regional endpoints (eu1, us1), SDKs in Ruby, PHP, JavaScript, Java, Python, and C#, and a documented 99.88% deliverability rate on billions of emails processed annually. Core product modules include the Email API, SMTP, White Label Email Service, Email Validation API, HIPAA Email API, an Email HTML Builder (drag-and-drop with an AI-powered HTML editor and 40+ templates), and supporting tools for analytics, automation, dedicated IPs with 40-day warmup, suppression lists, webhooks, and project-level role-based access.
The business model is usage-based: $0.22 per 1,000 emails on the standard tariff and $0.07 per 1,000 emails on the custom/volume tariff, with a 4-month free trial at 6,000 emails/month that requires no credit card. Customer segments span SaaS, e-commerce, healthcare (via HIPAA), nonprofits, education, agencies, travel, restaurants, fitness, and mobile apps, and named enterprise customers include Rozetka, Chicco, Pin Up, Viqeo, Metropolitan, and Futurra. Distribution is fully self-serve and product-led, supplemented by integration marketplace presence (Zapier, Make.com, Albato, Bloomreach/Exponea, Drupal) and targeted migration paths from Mailtrap, SendGrid, and Mailgun. The company is privately held, reports no external funding rounds, and is GDPR-compliant with SOC2 Type 2 reports held at the data center level.
UniOne Email API firmographics
Firmographics- Name
- UniOne Email API
- Legal name
- ECOMZ HOLDING LIMITED
- Website
- https://unione.io
- Company type
- Private
- Founded year
- 2018
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- UniOne Email API is a Cyprus-headquartered, developer-focused email delivery platform providing transactional and marketing email via REST API and SMTP, priced at $0.07-$0.22 per 1,000 emails and serving SMBs, SaaS, e-commerce, and healthcare customers worldwide.
- Ownership category
- akta.pro rank
UniOne Email API industry classification
Industry- Product category
- Email Delivery API
- NAICS
- Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518210)
- SIC
- Services-Prepackaged Software (7372)
- akta.pro primary industry
- Email Marketing Services (Campaigns, Deliverability, Lifecycle) (BPAFAKAB)
- akta.pro secondary industry
- Email Marketing Services (Campaign Strategy, Design, Deliverability) (MPAAAIAA)
Keywords
Where UniOne Email API is headquartered
LocationHeadquarters
- HQ city
- Paphos
- HQ country
- Cyprus
- HQ region
- Europe
Offices2 records
Markets served
UniOne Email API business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Personnel, Marketing or Sales, Operations
Revenue model
- Email Delivery (Transactional & Marketing): Usage-based pricing per 1,000 emails sent. Base tariff: $0.22 per 1,000 emails, custom tariff: $0.07 per 1,000 emails. Revenue scales with volume of emails sent through the platform.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Pay-as-you-go | Free Trial - 6,000 emails/month for 4 months |
| Usage-based | Monthly | StartUp 6K - Free for 4 months after registration |
| Usage-based | Monthly | Basic Tariff - $0.22 per 1,000 emails |
| Usage-based | Multi-year contract | Custom Tariff - $0.07 per 1,000 emails |
Go-to-market motion2 records
Distribution channels5 records
Marketing channels7 records
UniOne Email API product offering
Product offeringCore offering
UniOne provides an API-powered email delivery platform for sending transactional and marketing emails through a REST Web API and SMTP relay. The service includes a visual drag-and-drop email builder with 40+ templates, an AI-powered HTML editor, real-time webhook event notifications, email validation, dedicated IPs with automatic warmup, suppression lists, and multi-engine template processing (Simple, Velocity, Liquid). Pricing is usage-based at $0.22 per 1,000 emails (basic) down to $0.07 per 1,000 emails (custom volume), with a 4-month free trial of 6,000 emails per month and SDKs for Ruby, PHP, JavaScript, Java, Python, and C#.
Product overview
UniOne is an API-powered email delivery platform providing both a unified core product (Email API and SMTP) and modular solutions. The core offering includes transactional and marketing email sending via REST API or SMTP, complemented by the Email HTML Builder (visual drag-and-drop editor with AI-powered HTML editing), Email Analytics, and Email Automation. Additional API products include Email Validation API and White Label Email Service. The platform offers specialized vertical solutions including HIPAA Email API for healthcare, Enterprise Email Solutions, Email Solution for SaaS, Ecommerce Email Marketing, and industry-specific solutions (Travel, Restaurant, Fitness, Nonprofits, Education). Migration services from Mailtrap, SendGrid, and Mailgun are also available.
Differentiator
Problem solved
Functional benefit
Products and services
- Email API RESTful Web API for sending transactional and marketing emails, supporting JSON request/response, webhooks, and real-time event notifications. Designed for developers and engineering teams integrating programmatic email sending into applications.
- SMTP SMTP relay service for email sending requiring only host, login, and password credentials, supporting up to 5,000 emails/hour per connection and 50,000 emails/hour with 10 connections. Designed for users seeking simple email integration without API complexity.
- White Label Email Service White-label solution allowing agencies and SaaS providers to offer branded email services under their own brand. Includes independent project environments and role-based shared access for multi-client management.
- Email Validation API Standalone API for single and batch email address validation to reduce bounces and improve sender reputation. Available as a separate API product for developers and businesses.
- HIPAA Email API HIPAA-compliant email solution for healthcare organizations requiring protected health information handling. Supports patient communications, appointment reminders, and health tips.
- Enterprise Email Solutions Enterprise-grade email delivery service offering dedicated IPs, custom warmup, custom tariff pricing as low as $0.07 per 1,000 emails, and SLA guarantees. Targeted at large organizations with high-volume, compliance-driven email needs.
Quantifiable outcome
- 99.88% email deliverability rate for transactional emails including large-volume
- +4 more outcomes
Companies that use UniOne Email API
Customer profileNamed customers9 records
Segments12 records
Ideal customer profiles5 records
UniOne Email API technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration7 records
Feature10 records
UniOne Email API partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core and minor.
- ZapiercoreNative Zapier integration allowing UniOne to connect with thousands of applications in the Zapier ecosystem for automated workflow triggers and actions
- Make.com (formerly Integromat)coreIntegration with Make.com (Integromat) for visual workflow automation connecting UniOne with other platforms and services
- CDP Institute EuropeminorPartnership with CDP Institute Europe for customer data platform integration and best practices
Scale indicators7 records
Recent moves6 records
Expansion highlights6 records
UniOne Email API competitors and assessment
Company assessmentDirect peers
- Mailtrap: Email delivery/sending API plus testing product directly compared on UniOne's site. Targets the same developer and SMB segments with usage-based pricing and a similar feature set including templates and analytics.
- Postmark: Transactional-only email API known for premium deliverability and reliability. Competes with UniOne on the same high-trust transactional workloads and is often listed alongside SendGrid and Mailgun in developer evaluations.
- Mailgun (Sinch): Direct transactional email API competitor with similar developer-first positioning, SMTP relay and dedicated IP offerings. UniOne publishes a dedicated Mailgun-to-UniOne migration page, confirming head-to-head competition.
- SendGrid (Twilio): Category-defining transactional and marketing email API platform and the benchmark UniOne explicitly compares against. Operates at much larger scale under Twilio with overlapping Web API, SMTP, dedicated IPs, and templates.
- SparkPost: Enterprise-focused transactional email API with deep analytics, dedicated IPs and high-volume delivery. Competes with UniOne's Enterprise Email Solutions tier for Fortune 500 and high-throughput senders.
- Mailjet: Europe-based transactional and marketing email API with SMTP relay and templating. Targets the same SMB/mid-market segment with comparable usage-based pricing and is a frequent SendGrid alternative.
Broad incumbents
- Brevo (formerly Sendinblue): European-headquartered multi-channel marketing platform combining transactional email, marketing automation, SMS and CRM. Overlaps with UniOne's marketing email and automation roadmap plus Selzy's all-in-one positioning.
- Amazon Simple Email Service (SES): Hyperscaler transactional email service priced at AWS-cost economics. Acts as the pricing floor for the entire industry and a frequent alternative for cost-sensitive engineering teams evaluating UniOne.
Emerging players
- Resend: Newer developer-first transactional email API positioned as a modern SendGrid alternative with React Email-based templating. Targets the same audience UniOne courts with its API-first, sub-15-minute onboarding promise.
- Customer.io: Developer-centric messaging platform spanning transactional email, push and in-app. Comparable developer-led GTM and overlap with UniOne's SaaS and mobile app marketing use cases.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks7 records
Key highlights7 records
Customer concentration
UniOne Email API social profiles
Digital presenceUniOne Email API compliance and trust
Trust signalCompliance2 records
UniOne Email API financial estimates
Financial estimateRevenue estimate
Valuation estimate
UniOne Email API leadership team
Management profileNumber of profiles
Profiles1 record
UniOne Email API funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
UniOne Email API M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about UniOne Email API
What does UniOne Email API do?
UniOne provides an API-powered email delivery platform for sending transactional and marketing emails through a REST Web API and SMTP relay. The service includes a visual drag-and-drop email builder with 40+ templates, an AI-powered HTML editor, real-time webhook event notifications, email validation, dedicated IPs with automatic warmup, suppression lists, and multi-engine template processing (Simple, Velocity, Liquid). Pricing is usage-based at $0.22 per 1,000 emails (basic) down to $0.07 per 1,000 emails (custom volume), with a 4-month free trial of 6,000 emails per month and SDKs for Ruby, PHP, JavaScript, Java, Python, and C#.
Is UniOne Email API a public or private company?
UniOne Email API is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was UniOne Email API founded?
UniOne Email API was founded in 2018. It employs 1 to 10 people.
Where is UniOne Email API based?
UniOne Email API is headquartered in Paphos, Cyprus, in the Europe region.
How does UniOne Email API make money?
One revenue line is on record: email Delivery (Transactional & Marketing).
Who are UniOne Email API's main competitors?
Direct peers on record are Mailtrap, Postmark, Mailgun (Sinch), SendGrid (Twilio), SparkPost and Mailjet. Broad incumbents are Brevo (formerly Sendinblue) and Amazon Simple Email Service (SES). Emerging players are Resend and Customer.io.
Does UniOne Email API have an API?
Yes. UniOne offers a Web API for transactional and marketing email sending. All API methods require HTTPS connection, accept HTTP POST requests in JSON format up to 10 megabytes, and return JSON responses. The preferred endpoint is https://api.unione.io/en/transactional/api/v1, with regional alternatives (eu1, us1). SMTP API is also available, supporting up to 5,000 emails/hour per connection and 50,000 emails/hour with 10 connections. Web API can handle several million emails per hour. Available SDKs: Ruby gem, PHP 8+ SDK, PHP 7.x SDK, JavaScript SDK, C# library (GitHub and NuGet), Java SDK (beta), Python 3 SDK (beta). Postman collection available. Developer documentation is at docs.unione.io/en.
What industry is UniOne Email API in?
UniOne Email API's product category is Email Delivery API. Its primary akta.pro industry code is BPAFAKAB, Email Marketing Services (Campaigns, Deliverability, Lifecycle), with a secondary code of MPAAAIAA, Email Marketing Services (Campaign Strategy, Design, Deliverability). Its NAICS code is 518210 and its SIC code is 7372.