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Alternatives · 2026

The best Mailmark alternatives

The rest of Best Transactional Email Software, in this site's order: each with what it costs, where it runs and its record score.

1
turboSMTP

It may suit website and app operators who need transactional email, as well as teams sending newsletters or marketing campaigns.

AndroidiPhone & iPadWeb+4 €14.95 a month Record6.6 Visit
2 AndroidiPhone & iPadWeb+1 $13 a month Record6.0 Visit
3
ReachMail

It suits small businesses, nonprofits, community organizations, and larger companies needing campaign or transactional email tools.

AndroidiPhone & iPadWeb+1 $8 a month Record6.0 Visit
4
MailerSend

MailerSend suits teams that need transactional email tools and integrations with listed services.

iPhone & iPadWebAPI $7 a month, billed yearly Record5.7 Visit
5
EmailSuccess

EmailSuccess suits organizations operating enterprise email gateways or high-volume SMTP servers.

WebWindowsMac+2 Free plan Record5.6 Visit
6
Postmark

Postmark suits developers and teams that need to send and track transactional or broadcast application email.

WebAPI Free plan Record5.5 Visit
7
Twilio SendGrid

SendGrid suits developers and organizations sending transactional or marketing email through APIs or SMTP.

API $19.95 a month Record5.3 Visit
8
Maileroo

Maileroo is aimed at developers and scaling businesses, including startups, agencies, and enterprises.

WebAPI $10 a month Record5.2 Visit
9 WebAPI ₹399 a month Record5.2 Visit
10
Nuntly

Nuntly suits developers building transactional email into applications that need both outbound sending and inbound message handling.

WebAPI €10 a month Record5.2 Visit
11 WebAPI $20 a month Record5.2 Visit
12
SMTP2GO

SMTP2GO suits senders needing SMTP relay or API delivery, reporting, webhook events, and integrations.

WebAPI $100 a year Record5.2 Visit
13
Plunk

Plunk suits developers, marketers, and teams sharing email templates.

WebAPISelf-hosted Free plan Record5.1 Visit
14 WebAPI $20 a month Record5.1 Visit
15 WebAPI $9 one-time Record5.0 Visit
16 WebAPISelf-hosted €30 a month Record5.0 Visit
17
Reloop

Reloop suits developers and teams building transactional or programmatic email workflows who want API, SMTP, or inbound webhook options.

Self-hosted $10 a month Record5.0 Visit
18 Web $10 a month Record4.9 Visit
19 WebAPI $19.95 a month Record4.9 Visit
20
Posthawk

Posthawk suits developers and teams that need to send several types of email through a range of languages, protocols, or frameworks.

Self-hosted $20 a month Record4.8 Visit
21 WebAPI $20 a month, billed yearly Record4.7 Visit
22 WebAPI $29 a month Record4.7 Visit
23
Netcore Email API

It suits mid-market and enterprise B2C brands in ecommerce, retail, BFSI, media, travel, edtech, and D2C.

WebAPI Free plan Record4.5 Visit
24
Posta

Posta suits teams wanting self-hosted email delivery, inbound mail, templates, and webhooks.

WebAPISelf-hosted Free plan Record4.5 Visit