Alternatives · Email Sending
KingSMTP alternatives
As of Nov 12, 2026, the highest-graded KingSMTP alternative is Mailgun (2.4 GPA). It's also the best free one.
KingSMTP compared with 5 alternatives: SMTP2GO, turboSMTP, SMTP.com, Postmark and Mailgun.
KingSMTP is a paid product with a free trial, starting at $20 per month for up to 20,000 emails. 4 of the 5 alternatives are free or have a free plan.
Listings checked up to Nov 12, 2026 · Where the facts come from
Black Friday: is there a KingSMTP sale?
At a glance
Price against what you get
KingSMTP starts at $20 a month and scores 2.0 out of 4 on features, ease of use and platforms. 3 of the 5 alternatives on this chart score higher and start lower: SMTP2GO, Postmark and Mailgun.
SMTP.com scores higher without starting lower. turboSMTP starts lower without scoring higher.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
How each one differs from KingSMTP
SMTP2GO
SMTP relay and email API priced by emails a month, with a free plan
- SMTP2GO starts at $15 per month for 10,000 emails, billed monthly.
- SMTP2GO has a free plan, which KingSMTP lacks.
Suits: Small businesses sending app or website email at low volume
turboSMTP
SMTP relay and email API on European infrastructure, with a free plan
- turboSMTP starts at $12.46 per month for 15,000 emails, billed annually ($14.95 monthly).
- turboSMTP has a free plan, which KingSMTP lacks.
- turboSMTP also covers email verification.
Suits: Small senders who fit in 200 emails a day on the free plan
SMTP.com
SMTP relay and email API sold in monthly volume plans from 50,000
- SMTP.com starts at $25 per month for 50,000 emails.
Suits: Senders who already need 50,000 emails a month or more
Postmark
Transactional email API and SMTP, with broadcasts on a separate stream
- Postmark starts at $15 per month for 10,000 emails.
- Postmark has a free plan, which KingSMTP lacks.
- Postmark also covers dMARC.
Suits: Software teams whose password resets and receipts must arrive fast
Mailgun
Email API and SMTP relay for developers, with list validation
- Mailgun starts at $15 per month for 10,000 emails.
- Mailgun has a free plan, which KingSMTP lacks.
- Mailgun also covers email verification.
Suits: Developers sending and receiving email from an app
Limits worth knowing in KingSMTP
- The pricing page lists crypto payment; it does not say whether cards are accepted.
- Volume is capped per plan at 20,000, 50,000 or 100,000 emails a month; anything more is a custom plan.
- Plan feature lists mention a shared IP option, and no dedicated IP is listed.
- The no-KYC and no-scanning claims are the vendor's own statements.
Common questions
What are the alternatives to KingSMTP?
The alternatives to KingSMTP in this directory are SMTP2GO, turboSMTP, SMTP.com, Postmark and Mailgun. Each one has a side-by-side comparison with KingSMTP.
Is there a free alternative to KingSMTP?
Yes. SMTP2GO, turboSMTP, Postmark and Mailgun have a free plan alongside paid ones.
When were these prices checked?
Each listing shows its own date. On this page they run from Oct 18, 2026 to Nov 12, 2026. Vendors change prices without notice, so confirm on their site before you buy.