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Top Rated Transactional Email Software with Api - Page 4

Last updated: June 2026

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82 software options

Campaigner logo

Powerful Email Marketing & Automation platform

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Advanced yet easy-to-use email marketing platform featuring automation workflows, contact segmentation, multivariate experiments and A/B split testing, drag & drop and HTML email editors, pre-built templates. conversion tracking and real time reporting.

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Lettr logo
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Cloud-based transactional email API for artisans

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Lettr is a transactional email platform with HTTP API + SMTP relay, real-time webhooks, analytics, and a visual template editor with version history and a draft/publish workflow for teams.

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Pingram logo
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Simple APIs for email, SMS, AI voice, and WhatsApp.

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Pingram (formerly NotificationAPI) is a communications API for email, SMS, voice, and WhatsApp. Built-in infrastructure, A2P 10DLC, and voice AI let developers ship faster with a single, simple API.

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Aument logo
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Always on email + SMS marketing for Shopify stores

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For ecommerce that want to grab attention, Aument holds it. Always-on email and SMS marketing.

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Marigold Liveclicker logo
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Give customers what they want - at the time of open.

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Purpose-built to make your emails more interactive, personalized and timely, Liveclicker by Zeta is the ultimate companion for your email marketing solution. We’ll help you amplify engagement, increase clicks and cultivate loyalty with a robust selection of real-time personalization features.

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JetSend logo
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Transactional email management platform

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JetSend is a transactional email management solution that allows businesses to send, track, and manage email campaigns. The platform also offers suppression list management with built-in compliance measures to ensure all communication are GDPR compliant.

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Everlytic logo
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Bulk communication platform

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Empower your business software to automatically trigger and personalize business-critical emails and text messages to customers when they transact with your organization – all via a restful API or SMTP relay.

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