A ranking needs a workload, not just a price
Cost per email is monthly software cost divided by messages actually sent. It changes when an allowance is underused, when a list grows into another tier, or when a plan bundles more sends than the team needs. Any ranking that publishes one universal rate without a workload is incomplete.
This comparison uses one full-list campaign per month at 1,000, 5,000 and 10,000 contacts. It uses the same dated pricing assumptions as our 2026 budget guide and excludes taxes, promotions, annual discounts, add-ons and delivery infrastructure. Free plans are not ranked because a zero-dollar numerator always wins while concealing daily caps and feature limits.
| Platform | 1,000 sends | 5,000 sends | 10,000 sends |
|---|---|---|---|
| FreeEmailSender | $0.0010 | $0.0010 | $0.0009 on Basic |
| Brevo Starter | About $0.0170 | About $0.0058 | About $0.0029 |
| Sender Standard | About $0.0100 | About $0.0066 | About $0.0057 |
| Mailchimp Essentials | About $0.0200 | About $0.0150 | About $0.0110 |
Ranking for one occasional campaign
For the paid one-campaign workload, FreeEmailSender ranks first on direct software cost at each audience size. Its campaign rate scales linearly until the $9 Basic allowance becomes cheaper at 9,000 sends. Brevo is next at 10,000 in this model, followed by Sender and Mailchimp.
That order is not a product-quality score. A team that needs hosted forms, sophisticated automations, ecommerce integrations or multiple user roles may receive more value from a higher-priced bundle. Cost per email should narrow the shortlist, not replace a requirements review.
Why FreeEmailSender’s denominator is different
FreeEmailSender charges for campaign sends and relies on the user’s SMTP-enabled account. Mailchimp and Sender host a broader contact and delivery environment inside their subscription. Brevo primarily meters message volume while also applying contact limits to some tiers. Dividing each invoice by sends produces a useful operational ratio, but the products are not identical.
Include the connected SMTP cost when calculating total cost per delivered email. If an existing business mailbox or SMTP contract already covers the volume, the incremental expense may be low. If new dedicated infrastructure is required, that charge belongs in the numerator.
How frequency changes the ranking
Suppose 10,000 contacts receive four campaigns in a month. FreeEmailSender Basic still covers 40,000 sends for $9, yielding $0.000225 per email. A contact-based subscription may also keep the same monthly price because the send allowance is a multiple of contacts. Brevo may need a larger message tier, depending on the selected plan.
At very high automation frequency, feature access and operational controls become as important as the nominal rate. Model newsletters, triggered messages, tests and resends—not only the biggest scheduled campaign.
Calculate your effective rate
Use the amount actually charged, including mandatory add-ons, divided by messages successfully attempted during the same billing period. Keep a second metric for delivered messages because invalid contacts and infrastructure failures can make a low nominal send price expensive in practice.
Do not divide by the plan’s maximum allowance unless the allowance was used. A $9 plan with 100,000 capacity costs $0.00009 per email only at full use. If it sends 10,000, its effective software cost is $0.0009.
- Nominal cost per send = software charge ÷ attempted sends
- Delivered cost = total operating cost ÷ delivered messages
- Conversion cost = total operating cost ÷ meaningful outcomes
Price is not deliverability
No software price guarantees inbox placement. Authentication, permission, list quality, complaint history, content and infrastructure all influence delivery. A cheap send to an unprepared list can create more damage than value.
Evaluate failure reporting, suppression behavior, unsubscribe handling and event visibility. Those controls help protect the investment represented by every recipient relationship.
Best choice by buyer type
FreeEmailSender is cost-focused for teams that already have suitable SMTP access and want CSV campaigns, templates and analytics without paying primarily for stored contacts. Sender’s free tier can be attractive for a small list needing more included automation. Brevo fits send-volume buyers who value its broader multichannel suite. Mailchimp may suit teams invested in its integrations and marketing workflow.
Recheck current checkout prices and test the complete workflow before moving a production list. The cheapest quote is useful only when it covers the work the team genuinely needs.
Frequently asked questions
Which email marketing tool has the lowest cost per email?
For the paid one-campaign workloads modeled here, FreeEmailSender has the lowest direct software cost. A qualifying free plan can have a lower dollar cost, and total cost must include any SMTP infrastructure.
How do I calculate email marketing cost per email?
Divide the actual software or total operating charge for the period by messages sent during that same period. Use delivered messages for a stricter operational measure.
Does a cheaper cost per email mean better value?
Not automatically. Features, deliverability controls, support, staff time and campaign outcomes determine total value.
Sources and further reading
These official product, pricing, policy, or methodology pages were reviewed for the factual claims in this article. Features and prices can change, so confirm current terms before making a decision.