What sending email really costs.
Email providers price by sending volume, list size, or both — which makes comparing them by hand tedious and error-prone. Set your monthly volume and contact count to rank twelve platforms, from Amazon SES to Mailchimp, by what they would actually bill you.
Monthly cost by provider
- Per-contact platforms (Mailchimp, Zoho Campaigns, Benchmark) bill for your list size even in months you send nothing.
- Per-email providers (SES, Postmark, Mailgun, Resend, Plunk) bill for every send — a large list emailed daily adds up fast.
- Amazon SES is infrastructure, not a platform — the price assumes you bring your own templates, automation, and deliverability work.
Plan-by-plan comparison
| Provider | Reference plan | Monthly cost | Per 1k emails | Annual cost |
|---|
Estimates use published base plans as of early 2026, mapped to the nearest tier at or above your inputs — no add-ons, overages, dedicated IPs, or negotiated discounts. Plan names and limits change often; treat the ranking as a shortlist and confirm current pricing with each provider.
How to find the best email service provider
Price gets you a shortlist, not a decision. These six criteria decide whether a provider still looks cheap six months after you migrate.
How many emails you send per month is the single biggest price driver. Estimate honestly — campaigns, newsletters, receipts, and notifications all count — and check what happens to the price at double your volume.
Transactional senders (receipts, resets, alerts) need API-first platforms like Postmark or SES. Marketing senders need campaign builders, segmentation, and automation like Mailchimp or Benchmark. Mixing both usually means two tools or a platform that separates the streams.
Your ESP has to talk to your stack: the storefront or app that triggers emails, your CRM, your analytics. A cheap provider that needs custom glue code can cost more than a pricier one with a native integration.
Compare cost per thousand emails at your real volume, not the headline starting price. Contact-priced platforms charge for subscribers you never email; volume-priced platforms charge for every send to a big list.
The cheapest email is worthless in the spam folder. Look for strong sender reputation, authentication tooling (SPF, DKIM, DMARC), dedicated IP options at scale, and published deliverability practices.
Moving lists, templates, automations, and domain reputation between providers is real work. Weigh migration help and support quality — especially if email drives revenue and downtime is expensive.
Transactional vs. marketing emails
Transactional emails — receipts, password resets, shipping updates — are triggered by user actions, sent to one person, and judged on speed and deliverability. Marketing emails — newsletters, promotions, announcements — go to many people, require consent and an unsubscribe link, and are judged on engagement. Keep them on separate sending streams so one angry unsubscribe never blocks a receipt.
Is email marketing worth the investment?
Email remains the highest-ROI channel in most businesses' mix — you own the list, reach people directly without an algorithm in between, personalize at scale, and measure every step from open to purchase. The platform fee is rarely the limiting factor; list quality and sending discipline are. That is also why overpaying for unused features stings: the money is better spent on content and segmentation.
Email marketing metrics that matter
Whichever provider you pick, judge it — and your campaigns — with the same six numbers.
Open rate
opens ÷ delivered × 100How many recipients opened the email. Apple Mail privacy inflates it — treat as a trend, not a truth.
Click-through rate
clicks ÷ delivered × 100The share of recipients who clicked a link. The most honest engagement signal you have.
Bounce rate
bounces ÷ sent × 100Emails that could not be delivered. Above ~2% damages sender reputation — clean your list.
Conversion rate
conversions ÷ delivered × 100Recipients who completed the goal — purchase, signup, booking. The metric your ESP bill should be judged against.
Unsubscribe rate
unsubscribes ÷ delivered × 100Above ~0.5% per campaign usually means wrong audience, wrong frequency, or wrong content.
ROI
(revenue − cost) ÷ cost × 100Email regularly returns $30–40 per dollar spent — which is why the platform cost matters less than using it well.
How we estimate these costs
Volume-priced providers are matched to the published tier that covers your monthly email count; pure pay-as-you-go senders like Amazon SES and Plunk are multiplied by their per-email rate. Contact-priced platforms are matched to the tier that covers your list size. The "per 1k emails" column divides each monthly cost by your sending volume so the two pricing models can be compared on one axis.
Beyond the subscription price
Budget for the extras the base plan hides: dedicated IP addresses at scale, overage rates in spiky months, paid add-ons for validation and inbox testing, and the engineering time a bare-bones provider shifts onto your team. When two options are close, the one with better deliverability tooling is almost always cheaper in practice.
Email pricing questions, answered
Common questions about how email providers charge and what these estimates cover.
