10 Best Email Marketing Tools in 2026

ContactMonkey is an internal communications software designed to help organizations deliver consistent and measurable communications across various channels. It enables users to create, send, and track internal emails and newsletters directly from Outlook and Gmail, eliminating the need for external tools or IT/design support. The platform offers a drag-and-drop email builder, multi-channel reach (Outlook, SMS, Teams, SharePoint), and robust analytics to measure performance through opens, clicks, and read times. The software is ideal for internal communication specialists, HR professionals, and leaders looking to streamline their communication efforts, boost employee engagement, and demonstrate the value of their internal comms. Key features include employee surveys, custom segmentation, multi-language support, timezone sending, and the ability to edit sent links. It also integrates seamlessly with Microsoft tools and allows for bulk email sends and secure sending on behalf of executives, addressing common pain points like lack of analytics, poor personalization, and manual processes.

Klaviyo is an email and SMS marketing platform built for e-commerce. Deep integrations with Shopify, BigCommerce, and stores. Automated flows trigger on customer behavior. Advanced segmentation targets the right customers. Predictive analytics forecast customer lifetime value. Marketing automation powered by your store's data.

Twilio is a cloud communications platform providing APIs for SMS, voice, video, WhatsApp, email, and authentication services. It enables developers to programmatically send messages and make calls.

Customer.io is a customer engagement platform for sending data-powered communications through email, SMS, push notifications, and in-app messaging with visual workflow automation.

ActiveCampaign is a marketing automation platform offering email marketing, CRM, multi-channel messaging, and AI-powered autonomous marketing with WhatsApp integration and advanced segmentation.

SendGrid is a cloud-based email delivery platform that provides transactional and marketing email services with high deliverability and powerful APIs.

beehiiv is a newsletter platform built for growth, offering custom websites, monetization tools, recommendation network, and advanced analytics for content creators.

Mailchimp is an all-in-one marketing platform that helps businesses manage email campaigns, automations, landing pages, and customer journeys.

Nimble is a comprehensive CRM solution designed specifically for solopreneurs and small teams, focusing on relationship management rather than just sales tracking. It unifies CRM, email marketing, sales prospecting, and automation into a single, uncluttered platform. Nimble helps users nurture relationships, accelerate engagement, and convert connections into lasting business growth by providing tools for contact management, AI-driven email campaigns, and sales automation. The platform offers features like Nimble Prospector for instant lead finding and enrichment from LinkedIn and other web sources, customizable deal pipelines, and workflow automation. It integrates seamlessly with Microsoft 365 and Google Workspace, allowing users to manage contacts, calendars, and emails in one place. Nimble aims to simplify CRM for small businesses by offering all essential tools in one plan, eliminating extra fees often associated with other CRMs, and providing a user-friendly experience to help grow relationships and streamline sales processes.

Attentive is an AI-powered SMS and email marketing platform trusted by 8,000+ global brands for personalized messaging at scale. The platform combines SMS, RCS (Rich Communication Services), and email to help businesses connect with customers through targeted campaigns. The platform's patented two-tap mobile technology converts website visitors into SMS subscribers. Attentive Signal identifies and engages anonymous website visitors, while comprehensive analytics provide customizable reports for data-driven decisions. Real-time personalization adapts messages based on individual preferences and behaviors. Attentive offers 100+ integrations with e-commerce platforms, customer service tools, loyalty programs, and data platforms. The platform supports international messaging across 20 countries with built-in compliance risk management for industries including retail, e-commerce, travel, hospitality, and entertainment.