Transactional Email & Email API
SaaS Browser tracks 369 Transactional Email & Email API software companies, with 34 added in the past 30 days. The top countries for Transactional Email & Email API SaaS include United States (47), Canada (7), United Kingdom (7).
Key Data Points for Transactional Email & Email API
369
Total Software1
34
New (Past 30 Days)2
24
Affiliate Programs3
3
Median Age (Years)4
+212
New (Past 365 Days)5
77
Churned (Past Year)6
26.6%
Annual Churn Rate7
60.2%
Free Trial8
Company Size Distribution9
2
Large (201-1,000)
3.8% of total
51
Small (2-50)
96.2% of total
Most Established Transactional Email & Email API Companies
| Company | Employees | Domain Rank | Founded | Added |
|---|---|---|---|---|
| Mailgun | 500 | 61 | — | 2025-02-10 |
| Mailinator | — | 56 | — | 2025-02-04 |
| Resend | 50 | 51 | 2023 | 2026-02-21 |
| Nylas | 500 | 47 | 2014 | 2025-02-05 |
| SMTP2GO | 50 | 47 | 2006 | 2025-02-10 |
| turboSMTP | — | 44 | — | 2025-02-26 |
| SMTP | — | 43 | — | 2025-02-28 |
| Emailable | 50 | 43 | 2017 | 2025-02-05 |
| AuthSMTP | — | 40 | — | 2025-02-10 |
| SendLayer | — | 39 | — | 2025-02-03 |
Top 10 Countries for Transactional Email & Email API SaaS
The following countries represent where most Transactional Email & Email API SaaS companies are headquartered, based on our data for 369 software products.
| Country | Count | % of Total |
|---|---|---|
| United States | 47 | 12.7% |
| Canada | 7 | 1.9% |
| United Kingdom | 7 | 1.9% |
| India | 6 | 1.6% |
| Australia | 5 | 1.4% |
| Netherlands | 3 | 0.8% |
| Cyprus | 3 | 0.8% |
| United Arab Emirates | 3 | 0.8% |
| Germany | 3 | 0.8% |
| Bangladesh | 2 | 0.5% |
SEO & Domain Authority for Transactional Email & Email API
Median Domain Rank10
8
vs. overall median of 8
Median Referring Domains11
2
vs. overall median of 2
Pricing Data for Transactional Email & Email API
Median Starting Price (USD)12
$5/mo
Median High Price (USD)13
$49/mo
Market Saturation for Transactional Email & Email API
This score is computed from a combination of total products, domain authority, referring domains, company age, traffic growth, pricing, and enterprise presence.
Saturation Score14
27 / 100 (Low)
Affiliate Programs in Transactional Email & Email API
24 Transactional Email & Email API SaaS companies offer affiliate programs (6.5% of total).
Median Commission15
23%
Commission Type Distribution
One-Time
2
Recurring
7
Most Recently Added Transactional Email & Email API SaaS
Median Age of Transactional Email & Email API SaaS Companies
The median Transactional Email & Email API SaaS company was founded 3.0 years ago (median founding year: 2023).
B2B / B2C Breakdown for Transactional Email & Email API16
90
Both B2B & B2C
24.4%
276
Business (B2B)
74.8%
3
Consumer (B2C)
0.8%
Based on 369 companies with consumer type data (100.0% of total).
SaaS Discovery Trend for Transactional Email & Email API
Monthly SaaS discovery count for Transactional Email & Email API compared to its share of all SaaS discovered. A rising percentage indicates this segment is growing faster than the overall market.
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Discover Transactional Email & Email API SaaS
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Roomie Workspace
Free Trial
The owner has verified their profile information displayed on this page.
An AI-powered team collaboration platform that unifies chat, video huddles, audio calls, and task management to help distributed teams communicate clearly and stay aligned across devices. It includes organized channels and threaded conversations, release management and milestone tracking, AI-generated stories and task suggestions, rich story descriptions, enhanced mobile chat UI and reliable calling, with self-hosting options and scalable pricing to solve fragmented discussions, unclear ownership, missed deadlines, and siloed information for startups, remote-first teams, and larger organizations seeking secure, productive collaboration.
Pricing:
$2-$2000/mo
The monthly pricing range for this SaaS product. Prices are normalized to monthly amounts where possible.
Remote Team Collaboration Tools
The category of this listing.
Email Marketing Software
The category of this listing.
This platform provides a highly scalable, API-driven email infrastructure tailored for developers and SaaS providers, allowing seamless migration, granular multi-tenant support, and real-time analytics for monitoring delivery performance such as open rates, click-throughs, bounces, and unsubscribes. It includes features like multi-tenant isolation, webhook event streaming, dynamic template generation using Handlebars, and comprehensive SDKs with full type safety, effectively solving problems related to large-scale email sending, operational complexity, and real-time tracking for organizations seeking reliable, high-volume email delivery without compromise.
Pricing:
$0-$140/mo
The monthly pricing range for this SaaS product. Prices are normalized to monthly amounts where possible.
Transactional Email & Email API
The category of this listing.
VerifyAtlas
The owner has verified their profile information displayed on this page.
This API provides real-time verification and risk assessment for user signups by analyzing email, phone number, and domain information to detect disposable email addresses, temporary phone numbers, suspicious domains, and potential fraudulent activity. Its main features include disposable email detection, temporary phone number identification, domain trust analysis, and risk scoring, which help prevent fake accounts, reduce abuse of free trials, improve lead quality, and mitigate platform fraud; it is intended for SaaS providers, online marketplaces, fintech applications, community platforms, and any digital service prioritizing secure and authentic user registration.
Pricing:
$0-$199/mo
The monthly pricing range for this SaaS product. Prices are normalized to monthly amounts where possible.
Email Outreach & Cold Emailing Tools
The category of this listing.
Transactional Email & Email API
The category of this listing.
This email delivery infrastructure provides a reliable, scalable, and secure SMTP relay solution designed for organizations of all sizes to send bulk and transactional emails efficiently, ensuring high deliverability rates and fast delivery times. Key features include advanced email authentication protocols such as DKIM, SPF, and DMARC, real-time analytics dashboards for monitoring campaigns, auto failover and redundancy with global infrastructure, and developer-friendly APIs for seamless integration, addressing challenges like email validation, deliverability, and security for businesses, marketers, developers, and IT professionals aiming to optimize their email communications.
Transactional Email & Email API
The category of this listing.
MailsGuide offers an Email Identification API that helps verify and validate email addresses to improve email delivery and protect sender reputation. With features like real-time validation, typo checking, and bulk email checks, this API ensures accurate and trustworthy email lists for effective communication.
Pricing:
$4.99-$149.99/mo
The monthly pricing range for this SaaS product. Prices are normalized to monthly amounts where possible.
Transactional Email & Email API
The category of this listing.
Cuttlefish is an easy-to-use, open-source transactional email service that ensures emails reach their destinations while maintaining a good email reputation. With real-time analytics, users can monitor email delivery, track opens and clicks, and manage email sending through a simple web interface.
Transactional Email & Email API
The category of this listing.
This tool provides a simulated SMTP email server designed specifically for developers to test email functionalities without risking sending real messages to users. It offers features such as easy setup with minimal configuration, email downloading and forwarding options, support for various email clients and formats (HTML and plain text), project sharing with colleagues via secure links, spam detection and scoring, and future integration with IMAP servers to streamline development workflows for individual coders and teams. It addresses common challenges like managing multiple environments, preventing accidental email slips during testing, simplifying collaboration, and ensuring email tests are safe, efficient, and compatible across different development setups and team members.
Pricing:
$2-$5/mo
The monthly pricing range for this SaaS product. Prices are normalized to monthly amounts where possible.
Transactional Email & Email API
The category of this listing.
Sidemail is an all-in-one email solution designed for SaaS businesses, offering tools like an email sending API, no-code email editor, and automated email sequences. It helps users build and manage mailing lists, send targeted messages, and keep customers informed with ease.
Transactional Email & Email API
The category of this listing.
Lettermint offers reliable email delivery services for transactional and marketing communications, ensuring messages reach inboxes securely and efficiently. With easy integration options and a focus on EU compliance, it provides developers and businesses with the tools needed for effective email management.
Pricing:
€10-€15/mo
The monthly pricing range for this SaaS product. Prices are normalized to monthly amounts where possible.
Transactional Email & Email API
The category of this listing.
EmailEngine is a self-hosted email automation platform that simplifies email integration for developers and businesses through a user-friendly REST API. It supports various email protocols and offers features like real-time notifications, OAuth2 integration, and custom webhook routes to enhance email management and communication.
Transactional Email & Email API
The category of this listing.
* Some or all parts of this page may be AI generated, so please verify any critical information independently.
Frequently Asked Questions
How many Transactional Email & Email API SaaS companies are there?
SaaS Browser tracks 369 Transactional Email & Email API software products as of July 2026. 34 new Transactional Email & Email API SaaS companies have been added in the past 30 days.
How many new Transactional Email & Email API SaaS companies are added each month?
34 new Transactional Email & Email API SaaS companies have been added to SaaS Browser in the past 30 days. Our proprietary crawling infrastructure continuously discovers new software products.
What are the most established Transactional Email & Email API SaaS companies?
The most established Transactional Email & Email API SaaS companies by domain authority include Mailgun, Mailinator, Resend, Nylas, SMTP2GO. These companies represent the highest domain rank scores in the Transactional Email & Email API category.
What is the typical company size for Transactional Email & Email API SaaS?
Among Transactional Email & Email API SaaS companies with employee data, the size distribution is: - 2 (3.8%), - 51 (96.2%).
What is the median domain authority for Transactional Email & Email API SaaS companies?
The median domain rank for Transactional Email & Email API SaaS companies is 8, compared to an overall SaaS median of 8. These companies have a median of 2 referring domains.
Which countries have the most Transactional Email & Email API SaaS companies?
The top countries for Transactional Email & Email API SaaS are: United States (47), Canada (7), United Kingdom (7), India (6), Australia (5). These represent the largest concentrations of Transactional Email & Email API software companies globally.
What percentage of Transactional Email & Email API SaaS companies offer affiliate programs?
24 Transactional Email & Email API SaaS companies offer affiliate programs, representing 6.5% of all Transactional Email & Email API software tracked by SaaS Browser. The median commission rate is 23%.
What is the median age of Transactional Email & Email API SaaS companies?
The median Transactional Email & Email API SaaS company was founded 3.0 years ago, with a median founding year of 2023.
Are Transactional Email & Email API SaaS companies mostly B2B or B2C?
Based on available data, Transactional Email & Email API SaaS companies break down as follows: Both B2B & B2C (24.4%), Business (B2B) (74.8%), Consumer (B2C) (0.8%).
What are the newest Transactional Email & Email API SaaS companies?
The most recently discovered Transactional Email & Email API SaaS companies include Emailify, NowMail, inbox2api, SilaSend, FineMail. SaaS Browser continuously discovers and indexes new software products using proprietary crawling infrastructure.
About SaaS Browser
SaaS Browser is the largest, most up-to-date SaaS database on the internet, the ultimate prospecting and research tool for SaaS companies.
We discover emerging tools weeks after launch, before they appear in Apollo, ZoomInfo, or other databases. Our purpose-built platform exclusively tracks real software products with verified data, unlike generic prospecting tools polluted with agencies, consultancies, and outdated listings.
From Fortune 500 enterprises to bootstrapped startups launching this week, if it's SaaS, we track it.
How these numbers are calculated
- Total Software. The number of published SaaS companies currently listed for this selection. Only companies that pass our automated quality checks are counted.
- New (Past 30 Days). The net number of SaaS companies newly published for this selection in the last 30 days.
- Affiliate Programs. The number of listed SaaS companies that operate a verified affiliate or referral program.
- Median Age (Years). The median age, in years, of companies in this selection, based on founding year. The median is the middle value, so half are older and half younger.
- New (Past 365 Days). The number of SaaS companies published for this selection over the last 365 days.
- Churned (Past Year). Companies published within the last year that are no longer listed - they went offline, were removed, or stopped passing our quality checks.
- Annual Churn Rate. The annual churn rate - churned companies as a percentage of all companies published in the last year (still-listed plus churned).
- Free Trial. The percentage of listed companies in this selection that offer a free trial.
- Company Size Distribution. Distribution of companies by employee count: solo (1), small (2–50), mid (51–200), large (201–1,000), enterprise (1,000+). Percentages are of companies with employee data.
- Median Domain Rank. The median domain rank (0–100) across listed companies, a measure of search-engine authority. Higher is stronger. Shown against the overall median across all SaaS for comparison.
- Median Referring Domains. The median number of unique referring domains (distinct external sites linking to a company) across listed companies.
- Median Starting Price (USD). The median entry-level monthly price (USD) across companies in this selection with pricing data.
- Median High Price (USD). The median premium monthly price (USD) across companies in this selection with pricing data.
- Saturation Score. A 0–100 market saturation score combining total products, domain authority, referring domains, company age, traffic growth, pricing, and enterprise presence. Higher means more competitive.
- Median Commission. The median affiliate commission rate offered by companies in this selection that run an affiliate program.
- B2B / B2C Breakdown. Breakdown of companies by target market - business (B2B), consumer (B2C), or both - among those with consumer-type data.
