We may earn a commission if you buy through links on this page. It never changes a score or a ranking. How we make money
SMTP2GO is listed from $10 a month and offers a free plan; a Reddit thread quotes its pricing page as allowing 1,000 outgoing emails per month free. That can suit modest sending, but it is worth comparing providers if you need a different price model, developer-focused tools or campaign features. The right switch depends on your sending needs. If your reason for leaving is IP-based authentication for legacy equipment, the available information here does not confirm which alternatives support it.
01Why people leave SMTP2GO
You need IP-based authentication
A sysadmin Reddit thread asks for relay services that authenticate by sending IP when the sending application cannot use credentials. The alternatives listed here are not confirmed to support that setup.
You want to compare prices
SMTP2GO is listed from $10 a month. Other options start lower or offer free plans, but caps, usage charges and undisclosed pricing can change the real cost.
You are weighing free-tier risk
One Reddit thread raised concerns about reputation on SMTP2GO’s free plan; commenters reported using the service without problems. That is anecdotal, not a deliverability guarantee.
02The alternatives, ranked by fit
- Lowest listed starting price
MailerSendMailerSendMailerSend is listed from $5.60 with a free plan, below SMTP2GO’s $10 starting price. It is positioned for transactional email apps and also lists email, SMS and WhatsApp, which may suit teams consolidating channels. Compare its free-tier caps and add-on costs before moving; the published information flags both as things to check.
Trade-off: Caps, add-on costs and support caveats need checking.
7.2/10from
$5.60/mofree plan - Developer-first sending
ResendResendResend is aimed at developers sending transactional email and teams that want API-first campaign tools. It has a free tier, so small apps can compare it with SMTP2GO without starting on a paid plan. Its paid starting price is not published on the vendor's site, and reliability reports are mixed, so price and service fit need more checking.
Trade-off: Paid pricing is not published; reliability reports are mixed.
7.2/10from
Freefree plan - API and SMTP
MailgunMailgunMailgun is listed for teams that need both an API and SMTP, plus validation tools. Its starting price is $15, with a free plan, making it a direct candidate if you want those listed capabilities rather than SMTP2GO’s modest-volume positioning. The free tier is limited to 100 emails a day, so treat it as a narrow testing option.
Trade-off: The free plan allows only 100 emails per day.
7.2/10from
$15/mofree plan - Transactional applications
PostmarkPostmarkPostmark is listed for transactional email, separate message streams and inbound email processing. Those requirements may make it a better fit than SMTP2GO if your application needs distinct streams or inbound handling. Its listed starting price is $15 and it has a free plan, but the free tier is small and agency costs deserve scrutiny.
Trade-off: Small free tier; agency costs need scrutiny.
7.4/10from
$15/mofree plan - Email API and campaigns
Twilio SendGridTwilio SendGridTwilio SendGrid is listed for teams sending through an email API, marketers who also need campaign tools, and senders who need SMTP service. Its $19.95 starting price is higher than SMTP2GO’s listed $10, so the case for switching is feature fit, not a lower entry price. Check sending caps and account approval risk first.
Trade-off: Higher listed starting price, sending caps and approval risk.
6.2/10from
$19.95/mo - Testing and sending
MailtrapMailtrapMailtrap is positioned for developers testing staging emails, teams combining testing and sending, and small senders starting on a free tier. Its listed starting price is $12, slightly above SMTP2GO’s $10. It may fit a testing workflow better, but check separate product pricing and usage caps before comparing total cost.
Trade-off: Separate product prices and usage caps complicate comparison.
7.2/10from
$12/mofree plan - Pay-per-use pricing
Amazon Simple Email Service (SES)Amazon Simple Email Service (SES)Amazon Simple Email Service lists a $0 base fee and usage charges, making it worth investigating if you are comparing billing models with SMTP2GO’s listed $10 starting price. The published information does not verify SES capabilities, so we cannot recommend it as a drop-in replacement without checking whether it meets your sending and integration requirements.
Trade-off: Capabilities are unverified in the published information.
3.0/10from
Freefree plan
03Side by side
| Tool | Score | From | Free plan | Best for |
|---|---|---|---|---|
 SMTP2GO SMTP2GO (current) | 7.8 | $10/mo | Yes | Apps needing transactional email delivery |
| MailerSend MailerSend | 7.2 | $5.60/mo | Yes | Apps sending transactional email |
| Resend Resend | 7.2 | Free | Yes | Developers sending transactional email |
| Mailgun Mailgun | 7.2 | $15/mo | Yes | Developers sending transactional email |
| Postmark Postmark | 7.4 | $15/mo | Yes | Transactional email for applications |
| Twilio SendGrid Twilio SendGrid | 6.2 | $19.95/mo | No | Teams sending through an email API |
| Mailtrap Mailtrap | 7.2 | $12/mo | Yes | Developers testing staging emails |
| Amazon Simple Email Service (SES) Amazon Simple Email Service (SES) | 3.0 | Free | Yes | Teams seeking pay-per-use email billing |
Questions people ask
What is the cheapest SMTP2GO alternative?
Among the listed alternatives, MailerSend has the lowest stated starting price at $5.60 and a free plan. Email service prices alone do not settle the comparison: check usage caps, add-ons and support terms. SMTP2GO is listed from $10 and has a free plan.
Is SMTP2GO’s free plan safe to use?
A Reddit thread quotes SMTP2GO’s pricing page as allowing 1,000 outgoing emails per month on the free plan. One thread raised concerns about sender reputation, while commenters reported using the service without problems. Those reports are anecdotal and do not establish a deliverability guarantee.
Which alternative supports sending-IP authentication?
The published information does not confirm that any of these alternatives supports authentication based on sending IP. A sysadmin Reddit thread raised this requirement for applications that cannot use credentials. Confirm the exact authentication method with a provider before switching; do not assume SMTP or API support covers it.