SendGrid
3.9 out of 5 stars
(8 Ratings)
Email is the backbone of your customer engagement. The Twilio SendGrid Email API is the email service trusted by developers and marketers for time-savings, scalability, and delivery expertise. Our flexible Email API and proprietary Mail Transfer Agent (MTA), intuitive console, powerful features, and email experts make it easy to ensure all your email gets delivered in seconds and without interruption. Monitor engagement data and optimize deliverability with our Deliverability Insights dashboard.
Whether you’re sending 100 emails or 100 billion, SendGrid is built to scale. Integrate with our RESTful APIs and SMTP in minutes, with sample code libraries available in 7 languages, interactive docs, templates, and more.
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ZeroBounce
4.9 out of 5 stars
(36 Ratings)
ZeroBounce is an email verification, scoring and deliverability platform helping businesses improve their inbox placement. The service detects email typos, nonexistent and abusive email accounts, spam traps and other risky email addresses.
ZeroBounce also provides an email scoring service and a suite of deliverability tools to further enhance email inbox placement. The company operates a military-grade security infrastructure, ensuring customer data is protected at the highest levels.
With more than 23 billion emails validated to date, ZeroBounce serves 400,000+ businesses in 190+ countries and adds up to 200 new clients every day. Companies using email lists validated by ZeroBounce report a 99%+ accuracy rate and maintain a good sending reputation. In 2019, ZeroBounce took no. 851 on the Inc. 5000 list of the fastest-growing private companies in the United States. In 2020, ZeroBounce rose to no. 40 on the list. In 2021, ZeroBounce was number 9 on the Inc. 5000 Regionals list.
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SMTP.com
1.0 out of 5 stars
(2 Ratings)
Reliable SMTP relay and email delivery services. Powerful email delivery services that enable you to send and track high volume emails effortlessly. Integrate and start sending in minutes. All your transactional, email relay and email delivery needs under one roof. Whether you need a low-latency email delivery provider for your transactional emails, scalable infrastructure for high-volume sends or reliable backend solution for your marketing campaigns, SMTP is built to deliver. Reputation Defender is SMTP’s proprietary technology that uses big data to proactively monitor your email list health and safeguard your domain and IP reputation among ISPs by suppressing bad emails in your sends from hard and soft bounces. This ensures your delivery rates and inbox placement incrementally gets better over time.
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Apollo
4.3 out of 5 stars
(6 Ratings)
Apollo is an AI-powered sales intelligence and engagement platform designed to help revenue teams find prospects, build pipeline, manage outreach, and close deals from one system. The platform combines a large B2B contact and company database with lead scoring, data enrichment, multichannel sales engagement, workflow automation, meeting scheduling, calling, and deal management. Outbound teams can identify target accounts, find verified contact information, create automated email and call sequences, and prioritize daily selling activities. Inbound capabilities help organizations identify website visitors, qualify leads, enrich incoming records, and route prospects to the appropriate sales representatives. Apollo also provides AI-assisted prospecting, meeting insights, conversation intelligence, sales coaching, analytics, and MCP connectivity for incorporating Apollo data and capabilities into supported AI workflows.
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