What is the cheapest bulk email service?

Amazon SES, at roughly $0.10 per thousand emails with no monthly minimum. That price buys delivery and nothing else — no contact storage, unsubscribe handling, suppression list, dashboard, or compliance enforcement — so it is only genuinely cheapest if you already have engineers who will build and maintain that layer.

Is there a free bulk email service?

Several, with real limits. Free tiers generally sit between 250 and 3,000 contacts, or a few thousand messages a month, which is enough to run a small list properly rather than merely to evaluate the product. Watch for two catches: whether sending is capped per day as well as per month, and whether the provider's branding is forced into your footer.

How many emails can I send before I need a paid plan?

Usually somewhere between 2,000 and 9,000 a month on a free tier. The more consequential threshold is 5,000 messages a day to a single provider's consumer domains, which is where Gmail, Yahoo, and Microsoft's bulk sender requirements begin applying regardless of what you pay.

Does the service I choose affect whether I land in spam?

Less than most buyers expect. Authentication on your own domain, list quality, and complaint rate account for the large majority of inbox placement. Where providers genuinely differ is in what they enforce: a platform that refuses to send until DMARC passes is removing the most common cause of rejection, while one that sends anyway is leaving that risk with you.

Can one service handle both marketing campaigns and transactional email?

Yes, and most large ones do — but almost always as two separately billed products, because the sending patterns and reputation requirements are different. What you want to avoid is running both through a single undifferentiated stream, where a badly received campaign can pull your password reset emails into the spam folder with it.

Buyer guide

The best bulk email services in 2026, ranked by what you actually pay

Updated 3 September 2026 · 9 min read · SendKernel

There is no single best bulk email service, but there is a single question that decides your bill: whether the provider charges for emails sent or for contacts stored. A 25,000-address list on a contact-priced plan like Mailchimp Standard runs about $310 a month. The same list on a volume-priced provider, mailed twice a month, is closer to $50. Pick the billing model that matches how you send before you compare a single feature — the gap between the two models is far wider than the gap between products inside either one.

The short version

Contact-priced plans punish large lists you rarely mail. Volume-priced plans punish small lists you mail daily.
Every serious provider delivers competently. Your domain authentication decides inbox placement far more than your choice of vendor does.
Amazon SES is the cheapest option by an order of magnitude, and the most expensive in engineering time.
Transactional and marketing email are separately billed products almost everywhere in 2026. Check which one you are being quoted.

The billing model matters more than the vendor

Bulk email is sold two ways, and the industry does not make the distinction obvious. Contact-priced platforms — Mailchimp, Kit, MailerLite — bill for the size of the list you store, with a sending allowance attached. Volume-priced platforms — Amazon SES, SendGrid, Mailgun, Postmark, Brevo — bill for messages that leave, and store contacts free or not at all.

The two models diverge violently at the extremes. A 50,000-address list you email once a quarter costs a fortune on contact pricing and almost nothing on volume pricing. A 500-address list you email every day is the reverse. So before comparing features, work out two numbers — your monthly message count and your stored list size — and rule out the model that penalizes your shape.

Your situation	Cheaper model	Why
Large list, infrequent sends	Volume-priced	You are storing addresses you rarely mail, and storage should be close to free
Small list, frequent sends	Contact-priced	Your message count outruns the allowance attached to a small list
App receipts and notifications	Volume-priced	There is no list at all — every send is triggered by one user's action
Both of the above	Two products, billed separately	A single combined plan forces you to over-buy whichever half you use less

The last row is the one most teams get wrong. Buying a marketing plan large enough to absorb transactional volume is the most common way to overpay for email.

What each service is actually for

Listed by the job each one does best rather than by rank, because the ranking depends entirely on the job. Prices are list prices in US dollars, read from each provider's public pricing page in September 2026. Everyone in this category changes pricing, so confirm before you commit.

1Amazon SES — cheapest, if you bring engineers
Roughly $0.10 per thousand emails, with no contact storage, no unsubscribe handling, no dashboard, and no compliance enforcement. You are buying a relay with delivery events; everything a marketing team touches, you build. The right answer above roughly a million messages a month when email is strategically important to you. Below that, the layer you would build costs more in salary than any platform fee.
2SendGrid — the incumbent at scale
Essentials starts around $19.95 a month, but the plan teams actually land on is Pro at roughly $89.95, because that is where a dedicated IP lives. Two details worth knowing before you price it: Marketing Campaigns is billed separately from the Email API — from about $15 a month at 5,000 contacts — so needing both means two invoices; and on the API plans your marketing and transactional sends draw down the same monthly volume cap. Deep integrations, a long track record, and an interface that shows its age.
3Postmark — the deliverability specialist
From about $15 a month for 10,000 messages, with overage around $1.80 per thousand. Narrow on purpose: transactional streams kept structurally separate from broadcast, so a bad campaign cannot drag receipt delivery down with it. Best-in-class delivery diagnostics. The free tier is token — around 100 messages a month — so this is a paid tool from day one, and it is not the tool for running a newsletter.
4Mailgun — the developer's relay
Basic around $15 for 10,000 emails, Foundation around $35 for 50,000. API-first, with strong routing and inbound parsing. Marketing features exist but are not why anyone chooses it.
5Resend — the best developer experience
Sending from $20 at 50,000 emails, marketing from $40 at 5,000 contacts, billed as two products. React Email is theirs, and it is genuinely the nicest way to build templates in this category. If your team writes React and email is a feature of your application, start here.
6Brevo — volume pricing with a marketing suite attached
Paid plans from roughly $9 a month, with the most usable free tier in this list at 300 messages a day — about 9,000 a month — including API access. An unusual and useful combination: billed by volume rather than by contact, but shipping automation, SMS, and a light CRM. The strongest option for a large list you mail occasionally and still want a campaign builder for.
7Mailchimp — the full marketing platform
Standard runs about $100 a month at 5,000 contacts and about $310 at 25,000. You are paying for landing pages, forms, ecommerce integrations, and branching automation journeys whether or not you use them, and transactional email is a separate paid add-on. Right when marketing is a department. Expensive when marketing is one person and a newsletter.
8MailerLite — the affordable newsletter suite
Paid plans from around $12 a month, with a drag-and-drop editor, forms, landing pages, automations, and a free tier generous enough to run something real. The best value in pure newsletter tooling. Transactional sending lives in a separate product, MailerSend.
9Kit — built for creators selling things
Around $33 a month at 1,000 subscribers. Commerce, paid newsletters, and digital products are first-class rather than bolted on. If your list is your business, the premium is easy to justify. If you just need to email your customers, it is not.
10SendKernel — two products, and compliance you cannot switch off
Sending is $18 a month for 50,000 transactional emails. Marketing is $36 for 5,000 contacts with broadcasts included. Both together is $54, and you can buy either half on its own. Three differences worth knowing before you sign up: unsubscribed contacts never count toward the meter, hitting a plan limit stops the send rather than generating an overage bill, and nothing leaves at all until SPF, DKIM, and DMARC pass on your domain. The last one is a constraint as much as a feature.

What the price tables hide

Three costs appear on nobody's pricing page, and between them they account for most of the distance between a quoted price and an actual invoice.

Whether unsubscribed contacts still count

Some platforms count archived, unsubscribed, and bounced addresses toward the contact limit. Those addresses can never be mailed again, and the law effectively requires you to keep them so you do not mail someone twice — so you are paying rent on records you are obliged to hold and forbidden to use. On a list a few years old this can be a fifth of the meter. Ask directly, and check the billing documentation rather than the pricing page.

What happens when you exceed the plan

There are two behaviours and they are opposites. Overage billing keeps sending and charges per extra message, which is how a retry loop in your application becomes a four-figure invoice overnight. A hard stop refuses the send and tells you. Neither is wrong, but you want to know which one you bought before the month you find out.

Whether you actually need a dedicated IP

A dedicated IP is usually sold as a deliverability upgrade, and below roughly 100,000 messages a month it is generally the opposite. A dedicated IP with low or irregular volume never establishes a reputation, and mail from an unknown IP is treated worse than mail from a well-managed shared pool. Buy one when volume is high and steady, not because a comparison table put a checkmark next to it.

Deliverability is mostly not about the vendor

Every service above delivers competently. The variable that decides whether your mail reaches an inbox is your own configuration, and since Gmail, Yahoo, and Microsoft tightened their bulk sender requirements it is close to binary.

SPF, DKIM, and DMARC all present and aligned on the sending domain. A missing DMARC record is now a rejection at the door rather than a spam-folder penalty.
Marketing mail needs a working one-click unsubscribe header — RFC 8058 — honoured within two days. Transactional mail is exempt from that requirement.
Spam complaints must stay under 0.3%. The number to manage to is 0.1%, because 0.3% is where mail stops being filtered and starts being refused.
These rules apply from 5,000 messages a day to a single provider's consumer domains — a line that one campaign to a modest list can cross.

How to choose in ten minutes

1Count your monthly messages and your stored list
Annual message volume divided by twelve, and the number of addresses you would keep on file. These two numbers eliminate more than half the market on their own.
2Decide whether you need transactional, marketing, or both
Receipts, password resets, and confirmations are transactional. Newsletters and announcements are marketing. If you need both, price them as two line items, and be suspicious of any plan that quotes only one.
3Check the overage behaviour and the contact definition
Hard stop or overage bill; subscribed contacts only or every stored record. Both answers usually live in billing documentation rather than on the pricing page.
4Send one real campaign before you move
Verify a domain, import a few hundred consented addresses, and send. Ten minutes of your own evidence beats any comparison table, this one included.

Questions people actually ask

What is the cheapest bulk email service?: Amazon SES, at roughly $0.10 per thousand emails with no monthly minimum. That price buys delivery and nothing else — no contact storage, unsubscribe handling, suppression list, dashboard, or compliance enforcement — so it is only genuinely cheapest if you already have engineers who will build and maintain that layer.
Is there a free bulk email service?: Several, with real limits. Free tiers generally sit between 250 and 3,000 contacts, or a few thousand messages a month, which is enough to run a small list properly rather than merely to evaluate the product. Watch for two catches: whether sending is capped per day as well as per month, and whether the provider's branding is forced into your footer.
How many emails can I send before I need a paid plan?: Usually somewhere between 2,000 and 9,000 a month on a free tier. The more consequential threshold is 5,000 messages a day to a single provider's consumer domains, which is where Gmail, Yahoo, and Microsoft's bulk sender requirements begin applying regardless of what you pay.
Does the service I choose affect whether I land in spam?: Less than most buyers expect. Authentication on your own domain, list quality, and complaint rate account for the large majority of inbox placement. Where providers genuinely differ is in what they enforce: a platform that refuses to send until DMARC passes is removing the most common cause of rejection, while one that sends anyway is leaving that risk with you.
Can one service handle both marketing campaigns and transactional email?: Yes, and most large ones do — but almost always as two separately billed products, because the sending patterns and reputation requirements are different. What you want to avoid is running both through a single undifferentiated stream, where a badly received campaign can pull your password reset emails into the spam folder with it.

Start with the free plan and send one real campaign

2,000 transactional emails and 500 contacts, free and not time-limited. Verify your domain, import a consented segment, and see how delivery looks before you move anything.

Create a free account

Where these numbers came from

Competitor list prices: Read from each provider's public pricing page in September 2026. Pricing in this category moves several times a year, so treat these as the shape of the market rather than a quote.
Bulk sender thresholds: Gmail, Yahoo, and Microsoft sender requirements as published by each provider: 5,000 messages a day to consumer domains, a 0.3% spam complaint ceiling, and required SPF, DKIM, and DMARC.