RANKINGS/SAAS/EMAIL DELIVERY SERVICES

Top 10 Email Delivery Services

10 ranked on capability, adoption, value, momentum and trust, with a plain verdict on every entry.

LISTER SCORE · UPDATED REGULARLY

SendGrid (rank 1) is ideal for developers and enterprises needing robust APIs and 99.95% uptime. Mailgun (rank 2) suits startups and high-volume senders with transparent pricing. Braze (rank 3) works best for marketing teams wanting advanced segmentation and customer journey orchestration.

RANKENTRYSCORETRENDFROM

1SendGridSendGrid manages over 3 trillion emails annually and has 99.95% uptime SLA95.0NEWFree tier (limited); paid from £9.95/month

2MailgunMailgun processes billions of emails monthly with sub-second API response times92.7NEW$0.50 per 1000 emails

3BrazeBraze's AI-powered Intelligent Timing sends emails when each customer is most likely to engage90.3NEWCustom

4Amazon SESAmazon SES costs just $0.10 per 1000 emails and integrates natively with AWS Lambda and SNS88.0NEW$0.10 per 1000 emails

5PostmarkPostmark delivers transactional emails in under 30 seconds with 99.99% uptime SLA85.7NEW$12/month

6KlaviyoKlaviyo's customers report average ROI of £45 per £1 spent on email83.3NEW£25 per month (or pay-as-you-go from £0.01 per SMS)

7Constant ContactConstant Contact serves over 4 million small businesses with its user-friendly email tools81.0NEW$20/month

8Zoho MailZoho Mail includes 30GB storage and advanced spam filtering with per-user pricing78.7NEW$2/user/month

9MailchimpMailchimp's free tier serves over 7 million small businesses with email automation76.3NEW£13 per month (SMS add-on)

10SparkPostSparkPost processes billions of emails monthly with real-time delivery tracking74.0NEWCustom

LAST UPDATED 2026-07-20CURATED · UPDATED REGULARLY

The ranking, in detail

SendGrid

Email and notification delivery platform

SendGrid powers transactional and marketing emails for millions of users globally. It offers extensive API documentation, SMTP relay, and dedicated IP options for enterprises.

From Free tier (limited); paid from £9.95/monthBest for Organisations prioritising email with push as secondary channel

95.0

Mailgun

Email API for developers

Mailgun provides powerful email APIs with flexible routing, SMTP, and WebHook support. Known for transparent pay-as-you-go pricing and excellent technical documentation.

From $0.50 per 1000 emailsBest for Startups and developers wanting simple, transparent email APIs

92.7

Braze

Customer engagement platform with AI-driven personalisation

Braze combines email with multi-channel messaging, advanced segmentation, and customer data orchestration. Built for enterprise marketing teams managing complex customer journeys.

From CustomBest for Large enterprises seeking sophisticated omnichannel customer engagement and AI-powered insights

90.3

Amazon SES

Simple, affordable, flexible email service from AWS

Amazon SES is a cost-effective email service integrated with the AWS ecosystem. Offers high deliverability and scales automatically with your sending needs.

From $0.10 per 1000 emailsBest for AWS-native applications and cost-conscious businesses sending high volumes

88.0

Postmark

Transactional email for web and mobile apps

Postmark specialises in transactional email with industry-leading delivery speeds. Built for developers who prioritise email reliability and excellent support.

From $12/monthBest for Web and mobile app developers needing ultra-reliable transactional email delivery

85.7

Klaviyo

E-commerce marketing automation with SMS and email

Klaviyo specialises in email and SMS marketing for ecommerce and direct-to-consumer brands. Offers advanced segmentation, automation, and analytics tailored for online retailers.

From £25 per month (or pay-as-you-go from £0.01 per SMS)Best for E-commerce businesses seeking integrated SMS and email marketing with pre-built retail flows

83.3

Constant Contact

Email marketing made easy

Constant Contact offers an intuitive email marketing platform with drag-and-drop builder and integrated CRM. Ideal for small businesses and non-technical users.

From $20/monthBest for Small businesses and non-technical users wanting easy email marketing

81.0

Zoho Mail

Business email hosting and collaboration

Zoho Mail provides business email hosting with spam filtering, collaboration tools, and integration with Zoho's broader business suite. Offers excellent value for organisations using Zoho products.

From $2/user/monthBest for Organisations using Zoho ecosystem tools and wanting affordable business email hosting

78.7

Mailchimp

All-in-one marketing platform with SMS, email, and automation

Mailchimp offers email marketing, automation, and CRM tools with a free tier. Well-suited for small to medium businesses wanting an all-in-one solution.

From £13 per month (SMS add-on)Best for Small to mid-market businesses seeking integrated email and SMS marketing in one platform

76.3

SparkPost

Cloud email platform for sending at scale

SparkPost provides email APIs and SMTP with advanced analytics and reporting. Offers flexible architecture for both transactional and marketing email at scale.

From CustomBest for Mid-market to enterprise organisations needing advanced email analytics and reporting

74.0

Frequently asked questions

What is the difference between transactional and marketing email services?

Transactional emails (confirmations, password resets) prioritise speed and reliability; marketing emails focus on engagement and analytics. Some platforms like SendGrid and Braze handle both, whilst others like Postmark specialise in transactional only.

What does deliverability mean and why does it matter?

Deliverability is whether emails reach the inbox rather than spam folders. It depends on sender reputation, SPF/DKIM authentication, content quality, and the provider's infrastructure. High-deliverability providers maintain strict sending standards.

Which email service is cheapest for high volumes?

Amazon SES is the most cost-effective at scale at £0.10 per 1000 emails. Mailgun charges £0.50 per 1000 emails. Both require technical setup. Mailchimp and Constant Contact use seat or contact-based pricing better suited to smaller volumes.

Related rankings

More SaaS rankings to compare.

All SaaS →

SAASJUL 20