Best Mass Email Service: 6 Options Compared by Price

How we chose

Mass email is priced three different ways: by contacts stored, by emails sent, and by active profiles. The cheapest service under one model is often the most expensive under another. This list ranks six services by the cost of real sending volumes, the free plan, automation on the entry tiers, and how the bill grows. Prices come from each vendor's published pricing, checked on 13 November 2026. No hands-on testing was done.

1. Brevo: best for big lists emailed infrequently

Brevo, formerly Sendinblue, is the only pick here that charges by emails sent rather than by contacts stored. A business with 50,000 contacts emailing twice a month pays for 100,000 sends. Every plan includes unlimited contacts.

Starter costs $9 a month for 5,000 emails, rising to about $32 at 20,000 and $65 to $69 at 100,000. Business starts at $18 a month and adds automation, A/B testing, advanced reporting and landing pages. SMS and WhatsApp are billed separately. Starter ships with no automation at all, and removing the Brevo logo is a paid add-on. Skip Brevo if you send daily to a small list, because a contact-priced tool will be cheaper.

2. MailerLite: best for small lists wanting simple pricing

MailerLite prices by active subscribers only. The line-up changed in June 2026, when Growing Business became Comfort and Advanced became Power. Every paid plan includes the full feature set.

The Free plan costs nothing for up to 250 subscribers and 2,500 emails a month. Comfort starts at $12 a month for up to 500 subscribers, $19 at 1,000, $33 at 2,500 and $49 at 5,000, with monthly sends capped at ten times the subscriber tier. Power starts at $25 a month for up to 500 subscribers, $39 at 1,000 and $69 at 5,000, with unlimited emails. Annual billing takes 10% off.

At 5,000 subscribers, Comfort allows 50,000 sends a month, about two a week to the full list. A sender emailing daily needs Power, which costs $20 a month more at the same size.

3. Mailchimp: best for all-in-one marketing on one bill

Mailchimp is the best-known name here: email campaigns, automation, landing pages, ads, a website builder and a CRM sit under one login. That breadth is the reason to buy it, because the email pricing alone is rarely the cheapest.

The Free plan costs nothing for up to 250 contacts and 500 sends a month. Essentials starts at $13 a month for 500 contacts, with sends at ten times the contact limit. Standard starts at $20 a month for 500 contacts, with sends at twelve times the limit and up to 200 automation flows. Premium starts at $350 a month for 10,000 contacts, with sends at fifteen times the limit.

The bill rises steeply with list size: Standard costs $20 a month at 500 contacts, $45 at 1,500, $100 at 5,000 and $135 at 10,000. Contacts in two audiences count twice. Skip Mailchimp if your list is large and your needs are simple, because Brevo or MailerLite will cost far less.

4. Twilio SendGrid: best for high-volume sending through an API

SendGrid, now sold by Twilio, is built for a different job. It is an email API for apps that send password resets, receipts, notifications and other transactional email, plus a separate Marketing Campaigns product for newsletters. If you want to design a newsletter in a drag-and-drop editor, it is the wrong tool.

The Email API's Essentials plan starts at $19.95 a month for 50,000 emails, or $34.95 for 100,000, on shared IP addresses. Pro starts at $89.95 a month for 100,000 emails and adds a dedicated IP, subuser management and single sign-on. Premier is custom priced. Marketing Campaigns is billed separately, with Basic from $15 a month and Advanced from $60.

The free plan is gone: SendGrid retired its permanent free tier in 2025, and new accounts get a 60-day trial capped at 100 emails a day. Extra emails on the 50,000 Essentials tier cost $0.00133 each.

5. Constant Contact: best for small businesses wanting phone support

Constant Contact is the familiar choice for small businesses and nonprofits, and its selling point is support: real people on the phone. There is no permanent free plan, only a free trial.

Lite costs $12 a month for up to 500 contacts, with a send allowance of ten times the contact tier. Standard costs $35 a month for 500 contacts, with twelve times the send allowance, segmentation and subject-line A/B testing. Premium costs $80 a month for 500 contacts, with twenty-four times the send allowance, 500 SMS messages a month and advanced reporting. Annual prepayment saves up to 15%, and nonprofits save up to 30%.

The ladder is steep: Lite rises from $12 a month at 500 contacts to $30 at 1,000, $50 at 2,500, $80 at 5,000 and $120 at 10,000. Sends above the allowance cost $0.002 each. Skip Constant Contact if you want a free plan or the lowest price at scale.

6. Klaviyo: best for ecommerce stores on Shopify

Klaviyo is a B2C CRM and email plus SMS platform built for ecommerce, where purchase behaviour sits at the centre of every campaign. Flows trigger on viewed products, abandoned carts and past purchases.

Pricing is by active profiles: everyone you can email, including anonymous browsers and lapsed buyers, not just engaged subscribers. The Free plan costs nothing for up to 250 active profiles and 500 emails a month. The Email plan starts at $20 a month for 251 to 500 profiles, with 5,000 sends at that tier, then $100 at 5,000 profiles and $150 at 10,000. Email plus SMS starts at $35 a month at 500 profiles. SMS is billed at dollar-based per-message rates, roughly $0.011 per US toll-free SMS plus carrier fees.

Since February 2025, Klaviyo bills on all active profiles, so a store with a large database of one-time buyers pays more than a store with the same number of engaged subscribers. Skip Klaviyo if you are not an ecommerce store, because the price buys features you will not use.

What 100,000 emails a month actually cost

The scenario: a sender with 10,000 contacts sending ten emails a month to the full list, 100,000 emails a month.

SendGrid looks cheapest, but it is an API product without a newsletter editor, so it is not a like-for-like comparison. Among newsletter tools, Brevo Starter wins because it charges for the sends, not the 10,000 contacts.

How to choose

Two rules cover most buyers. If you email rarely, pick the service that charges by sends. If you email often to a small list, pick the service that charges by contacts.

To find the addresses to send to, read the best email finder tools for sales teams. For the automation that follows the first campaign, see the guide to email automations for an online store, and for a page that captures subscribers, read the product landing page guide.

Common questions

Sources

• Brevo pricing
• MailerLite pricing
• Mailchimp marketing pricing
• Twilio SendGrid Email API pricing
• Constant Contact pricing
• Klaviyo pricing

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