KingSMTP vs SMTP2GO (2026): which should you pick?
As of Nov 12, 2026, SMTP2GO grades higher than KingSMTP: 2.2 against 2.0 out of 4.0.
Checked Oct 18, 2026 and Nov 12, 2026 · graded Oct 18, 2026 and Nov 12, 2026 by ToolGPA
SMTP2GO grades higher on platforms. They get the same grade on value for money, the free plan, features and ease of use.
Price, platforms and features side by side. The table says where each price was read and when.
KingSMTP
SMTP relay you can pay for in crypto, with no KYC
SMTP2GO
SMTP relay and email API priced by emails a month, with a free plan
Which one is for you
Pick KingSMTP if
- Fits if you want to pay in crypto without handing over ID
- Works for WordPress sites that want an SMTP relay and a plugin
Look elsewhere if
- Skip it if you need a dedicated IP, as only shared IPs are listed
- Tight if you send over 100,000 emails a month, because the plans stop there and the rest is a custom plan
- Watch out: the pricing page lists crypto payment and does not say whether cards are accepted
- Watch out: the no-ID and no-scanning claims are the vendor's own statements
- Skip it if you want a free plan, since there is only the 7-day trial
Pick SMTP2GO if
- Fits if your office printers, scanners or old systems need somewhere to send mail from
- Works for people who look after email for several clients and want subaccounts on a paid plan
Look elsewhere if
- Not for you if your app needs to receive and read incoming email
- Tight if you're staying free, at 1,000 emails a month and 200 a day, with no way to buy more
- Skip it if you only have a Gmail or Yahoo address to sign up with
- Pricey if you need a dedicated IP or email testing, which start with Professional at $75 a month
- Watch out: the free plan keeps 5 days of reports, and chat and phone help stop after 14 days
How we grade them
| 2.0GPAKingSMTPFair | 2.2GPASMTP2GOFair | |
|---|---|---|
| Value for money | C$20 a month for up to 20,000 emails, which is where the dearer quarter of sending services starts. | CGraded on 50,000 emails a month: Starter is $30 a month at that volume, with two months free if you pay yearly. That sits in the middle of what this category charges for that much sending. A dedicated IP and email testing need Professional at $75. |
| Free plan and trial | CA 7-day trial on all plans with no credit card; there is no free plan after it. | CFree for good with no card: 1,000 emails a month, but only 200 a day, with 5 days of reports, and extra emails can't be bought. Chat and phone help last 14 days. Enough for a test, tight for a live app. |
| Features | CSMTP and an HTTP API, a per-email dashboard, inbound routing and a WordPress plugin, but only a shared IP option and no dedicated IP in the listing. | CAPI and SMTP sending, automatic SPF and DKIM, delivery reports with bounce alerts, blacklist monitoring, three data regions and subaccounts. It does the sending job fully, but that's a smaller job: nothing on record covers receiving email or templates. |
| Ease of use | CNo store rating on record. You verify a sending domain with DNS records and wire up SMTP credentials or an API key before the first email goes out. | CJudged on how fast a developer sends a first email: copy the SMTP details or use the API, with code examples in five languages, once your domain is added. No rating on record. Sign-up refuses Gmail and Yahoo addresses, so you need a work domain. |
| Platforms and integrations | CA web dashboard, an API and a WordPress plugin; WordPress is the one named integration. | BWeb, with an SMTP relay and REST API that work from apps, servers and devices, plus WordPress, Google Workspace, Salesforce, Zoho CRM, Pipedrive, WHMCS, Laravel and Django. No desktop or phone app, so B is the top. |
| Best for | paying for SMTP in crypto with no ID check | relaying email from apps, sites and office printers |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: KingSMTP and SMTP2GO. How we grade
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. SMTP2GO starts at $15 a month and scores 2.3.
SMTP2GO scores higher and starts $5 a month lower. Of the other email sending services on the chart, 17 score higher than KingSMTP for less, and 6 score higher than SMTP2GO for less.
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
Where they differ
At a glance
| KingSMTP | SMTP2GO | |
|---|---|---|
| Pricing | Free trial | Free plan |
| Starts at | $20 per month for up to 20,000 emails | $15 per month for 10,000 emails, billed monthly |
| Free plan | None | 1,000 emails a month, limited to 200 a day, with 5 days of email reporting and ticket support. Extra emails are not allowed. No credit card needed. |
| Free trial | 7-day free trial on all plans, no credit card required | None listed |
| Web | ||
| Made by | KingSMTP | SMTP2GO |
| Price read from | kingsmtp.com | smtp2go.com |
| Checked | Nov 12, 2026 | Oct 18, 2026 |
Worth knowing
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.
SMTP2GO
- The free plan stops at 1,000 emails a month and 200 a day, and extra emails cannot be bought on it.
- A dedicated IP address and email testing tools start with Professional at $75 a month.
- Email reports are kept for 30 days on paid plans and 5 days on the free plan.
- Sign-up asks for an email address at a private domain; Gmail and Yahoo addresses are refused.
Key features
KingSMTP
- SMTP and HTTP API
- Connect an app, CMS or WordPress site through SMTP or the HTTP API, with DKIM and SPF included.
- Per-email dashboard
- Shows delivery status, spam scores, headers and the full SMTP transaction log for each message.
- Crypto payment, no KYC
- The site lists Bitcoin, USDT and Monero and says sign-up needs no identity verification.
- Inbound routing
- Business and Growth add MX routing for inbound mail.
- WordPress plugin
- A KingSMTP plugin is available from the WordPress directory and is included from the Business plan.
SMTP2GO
- SMTP relay and HTTP API
- Send through SMTP from an app, a mail client, a server or a device, or through a REST API with code examples in JavaScript, Node.js, PHP, Ruby and Python.
- Delivery tracking and reports
- Real-time reports follow each email to delivery and show bounces, spam complaints and unsubscribes, with weekly summaries and alerts on sudden bounce rises.
- Automatic SPF and DKIM
- Domain authentication is handled for you, along with feedback loops, blacklist monitoring and spam trap detection on every plan.
- Data centers in three regions
- Choose to send from and store data in the US, Europe or Australia, with best-path routing to the nearest location.
- Email testing
- Professional adds previews in more than 40 email clients and checks against major spam filters before you send.
- Subaccounts
- Paid plans can split sending into subaccounts, which suits agencies and managed service providers looking after several clients.
Plans
KingSMTP
Starter$20
per month for up to 20,000 emails
Full SMTP, HTTP API, email and Telegram support, and crypto payment.
Business$50
per month for up to 50,000 emails
Adds MX routing for inbound, priority support, an analytics dashboard, a WordPress plugin and a shared IP option.
Growth$100
per month for up to 100,000 emails
Adds shared IP, a custom domain and advanced analytics. Higher volumes are by custom plan.
SMTP2GO
Free Plan$0
1,000 emails a month and 200 a day, 5 days of reports, ticket support; chat and phone support for the first 14 days only.
Starter$15
per month for 10,000 emails, billed monthly
30 days of reports, ticket, chat and phone support, subaccounts and SMS. Extra emails $1.20 per 1,000. Price rises with volume: $30 a month at 50,000 emails.
Professional$75
per month for 100,000 emails, billed monthly
Adds a dedicated IP address and email testing tools. Extra emails cost $0.85 per 1,000, and the price rises with volume.
PremierCustom
Over 3 million emails a month, with personalized setup and support.
Ways to pay less
KingSMTP
- Annual discount
Two months free with yearly billing
The pricing page shows yearly prices of $200, $500 and $1,000 for the three plans and labels them Save 2 months.
SMTP2GO
- Annual discount
Two months free with yearly billing
Paying yearly gives two months free: Starter at 10,000 emails is $150 a year instead of $180, and Professional at 100,000 is $750 instead of $900.
- Education
30% education discount
SMTP2GO's education page offers schools a 30% discount, with unlimited users and systems on one account.
Common questions
Which is cheaper, KingSMTP or SMTP2GO?
As of Nov 12, 2026, SMTP2GO is cheaper to start with: $15 a month, against $20 a month for KingSMTP. KingSMTP starts at $20 per month for up to 20,000 emails, and SMTP2GO starts at $15 per month for 10,000 emails, billed monthly.
Which has a free plan, KingSMTP or SMTP2GO?
As of Nov 12, 2026, only SMTP2GO has a free plan. KingSMTP does not, though it has a free trial.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.