SENDUNE vs Klaviyo, Mailgun, Mailchimp, SendGrid, Resend

Here is a comparison of SENDUNE with some popular services in the same segment.

Let's get one thing out of the way. You can achieve your customer communication goals by choosing any one of the products listed here. The way SENDUNE shines is by offering a much simpler solution at an unbeatable price point. That being said, if you are already using some other service and it is working for you, don't change it.

Comparison Table (11-Feb-2025)

Product SENDUNE Klaviyo Mailchimp Mailgun SendGrid Resend
Key Features Transactional & marketing emails, SMS, AWS SES, automation, API. Email & SMS marketing, automation, AI insights, segmentation. Email marketing, website creation, social media, SMS, automation. Email delivery service, REST API, SMTP, validation, analytics. Email API & Marketing, SMTP, validation, automation, analytics. Email for developers, REST API, SMTP, batch sending, webhooks.
Free Plan Limits 5,000 contacts, 50,000 emails & SMS, all features, no expiry. 250 active profiles, max 500 emails, 150 SMS. 500 contacts, max 1,000 emails/month. 100 emails/day, 1-day log retention. 100 contacts & 100 emails/day. 100 transactional emails/day, 1,000 marketing contacts.
Starting Plan $24/month for 100,000 contacts, 250,000 emails & SMS. Starts at $45/month for 15,000 emails. 25,000 emails at $20/month.
6,000 emails at $13/month.		 Starts at $15/month for 10,000 emails. 100,000 emails at $19.95/month.
15,000 emails at $15/month.		 20,000 emails at $20/month.
Unlimited for 5,000 contacts at $40/month.
Website SENDUNE Klaviyo Mailchimp Mailgun SendGrid Resend

Why you should use SENDUNE !

Your entire tech stack is on AWS but you are not using AWS SES. Instead you burn money on third party email services like Mailchimp or SendGrid. SENDUNE eliminates all the complexity of AWS SES, giving you a reliable and cost-effective way to deliver transactional and marketing emails. Simply connect your AWS Account to get started.

AWS SES has the same reliability and deliverability as any other email service. And it comes at a price point too good to ignore. So why does SES not have 'top-of-mind' recall when it comes to email. There are a few reasons we know of.

  • AWS SES is hard to get started with. You need to get out of the sandbox first.
  • There's pages and pages of documentation to deal with.
  • There's no contact management.
  • You cannot design and manage email templates.
  • Expensive add-ons (delivery dashboard/virtual deliverability manager).

Is there a way to overcomes these hurdles? YES. That's where SENDUNE comes in.

SENDUNE abstracts away all the complexity of sending emails with AWS. What you get is a highly reliable way to deliver all your transactional and marketing messages at a fraction of the cost. We have clients who have created transactional email templates for signups and password resets many years ago and haven't touched them since. It is that reliable.

Let's structure our argument on why you should use SENDUNE.

There's only two things that matter when it comes to email. Deliverability and Cost. Lets break down each of these.

  • email deliverability

    Email Deliverability

    Every Email Service Provider (ESP) claims to have the best deliverability. These statements are misleading. Let's talk about this a bit.

    Email is a decentralised system. Every ESP is like a separate country. Just like every country gets to decide who they let in, every ESP gets to decide which email to receive and what to do with it (like send to inbox or send to junk). It means that the Sending ESP has zero control over the Receiving ESP. So any statements guaranteeing email deliverability are bunk.


    A well governed ESP, just like a well governed country, adheres to some rules and thereby builds a reputation. It is this reputation that allows the frictionless exchange of emails (i.e. deliverability).


    So how do things work?


    Email deliverability and inbox placement are a function of two things.

    • Adhering to industry standards (DMARC, DKIM, SPF, etc): All reputed ESP's, including SENDUNE, give you the tools to adhere to industry standards. In fact SENDUNE insisted on these standards from the very start (early 2018), much before they became mandatory. Adhering to these standards is like getting a 'visa-on-arrival' to another ESP. So deliverability comes down to the content of your email.

    • The content of your email: Email is a ‘Receivers’ prerogative, not the ‘Senders’. Even if you adhere to all the standards, sometimes your emails end up in spam folders. Gmail for example has a habit of sending emails from newer domains right into spam folders. Once you start marking them as 'not spam' they start getting delivered to your inbox. Yahoo, Outlook, Zoho, everyone has their quirks. This is why we recommend all new accounts to warm up their email accounts. It always comes down to the content of your email. The content must be both relevant, well formatted and well designed.


    Remember, if you are sending unsolicited emails, the pedigree of your ESP cannot help you in any way. In fact every ESP including SENDUNE will kick spammers out without a moments hesitation.


    Adhering to industry standards is a one time effort. Making content relevant to your subscribers is an ongoing effort. Focus on this and your emails will always hit the inbox.


    Deliverability Conclusion:     SENDUNE gives you the same deliverability as any other ESP.

  • sendune email cost comparisons

    Email Cost

    Every company - no matter the size or stage - needs a mix of transactional and marketing emails. Usually this mix is about 20% transactional and 80% marketing emails.

    Let's consider the email requirements for three types of organisations.

    • Startup (5,000 Users + 15,000 Emails)
    • SME (50,000 Users + 150,000 Emails)
    • Large Enterprise (500,000 Users + 1,500,000 Emails)


    This table compares the 'normalised' lowest monthly plan cost of different ESP's. As you can see, SENDUNE offers the same reliability and email deliverability at a fraction of the cost.


    Cost Conclusion:     SENDUNE is the undisputed winner if you want a full fledged platform with contact and template management, workflows, team management with role based access, etc.
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