AuthSMTP vs SMTP2GO (2026): which should you pick?
As of Nov 12, 2026, SMTP2GO grades higher than AuthSMTP: 2.2 against 1.8 out of 4.0.
Checked Oct 18, 2026 and Nov 12, 2026 · graded Oct 18, 2026 and Nov 12, 2026 by ToolGPA
AuthSMTP grades higher on value for money. SMTP2GO grades higher on the free plan and platforms. They get the same grade on features and ease of use.
Price, platforms and features side by side. The table says where each price was read and when.
SMTP2GO
SMTP relay and email API priced by emails a month, with a free plan
Which one is for you
Pick AuthSMTP if
- Fits if you want to send from your own domain through SMTP and need nothing else
- Works for older apps and devices that can only send through SMTP
Look elsewhere if
- Not for you if you want to try it free, because there is no free plan or trial
- Skip it if you want a campaign builder or marketing tools, as it is an SMTP relay only
- Watch out: pricing is by the year only, charged up front
- Watch out: the 14-day money-back guarantee covers only new card or PayPal accounts and ends after 100 messages
- Tight if you send big files: data allowances assume an average message of 300 KB
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
| 1.8GPAAuthSMTPWeak | 2.2GPASMTP2GOFair | |
|---|---|---|
| Value for money | B$72 a year for 2,000 emails a month works out to $6 a month, inside the cheapest quarter of email sending tools. It is billed yearly, and 10,000 emails a month is $216 a year. | 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 | FNo free plan and no trial. A 14-day money-back guarantee is not a trial, and it ends after 100 messages sent or an upgrade. | 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 | CIt does one job: authenticated SMTP sending, with several from addresses, a control panel, logs and scanning. It is a smaller job, and it does that job fully. | 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 | CA web control panel with no rating on record. You enter SMTP credentials into whatever sends your mail. | 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 | CWeb control panel only, with no integrations listed on the pages read. | 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 | sending from an app or device through SMTP | 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: AuthSMTP and SMTP2GO. How we grade
Price against what you get
AuthSMTP starts at $6 a month when paid by the year 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 $9 a month higher: the question is whether the extra is worth that to you. Of the other email sending services on the chart, 2 score higher than AuthSMTP 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
| AuthSMTP | SMTP2GO | |
|---|---|---|
| Pricing | Paid | Free plan |
| Starts at | $72 per year for 2,000 emails a month | $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 | None listed | None listed |
| Web | ||
| Made by | GetOnline Ltd | SMTP2GO |
| Price read from | authsmtp.com | smtp2go.com |
| Checked | Nov 12, 2026 | Oct 18, 2026 |
Worth knowing
AuthSMTP
- Pricing is by the year only, and no free plan or trial is offered.
- The 14-day money-back guarantee ends after 14 days, after 100 messages sent or after an upgrade, and covers new card or PayPal accounts only.
- It is an SMTP relay without a campaign builder or marketing tools.
- Data allowances are calculated on an average message size of 300 KB, which the pricing page lets you change.
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
AuthSMTP
- Authenticated SMTP
- Sends from any application through an authenticated SMTP server, with SSL or TLS, alternative ports and multiple concurrent connections.
- Multiple from addresses and domains
- Each account allows a set number of from addresses or domains, from 20 on the smallest to 600 on the larger accounts.
- Flexible quota upgrades
- The site says an account can be boosted in a month as usage grows, with no automatic payments.
- Control panel and logs
- An online control panel shows account status and logged errors. A separate REST API is described, with message submission in beta.
- Security and scanning
- Messages are virus-scanned, with sender-domain validation and SPF and DKIM support. The site says it maintains PCI DSS compliance.
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
AuthSMTP
AuthSMTP 2$72
per year for 2,000 emails a month
20 from addresses or domains, 600 MB of data a month, shared IP address.
AuthSMTP 4$108
per year for 4,000 emails a month
40 from addresses or domains, 1.2 GB of data a month, shared IP address.
AuthSMTP 10$216
per year for 10,000 emails a month
100 from addresses or domains and 3 GB of data a month. Steps of 6, 8 and 15 sit between the larger ones.
AuthSMTP 20$336
per year for 20,000 emails a month
200 from addresses or domains and 6 GB of data a month.
AuthSMTP 50$450
per year for 50,000 emails a month
500 from addresses or domains and 15 GB of data a month; the table marks a dedicated IP as available from this size.
AuthSMTP 100$870
per year for 100,000 emails a month
600 from addresses or domains and 30 GB of data a month. Larger accounts continue past 1 million a month.
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
AuthSMTP
No public discounts listed.
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, AuthSMTP or SMTP2GO?
As of Nov 12, 2026, AuthSMTP is cheaper to start with: $6 a month when paid by the year, against $15 a month for SMTP2GO. AuthSMTP starts at $72 per year for 2,000 emails a month, and SMTP2GO starts at $15 per month for 10,000 emails, billed monthly.
Which has a free plan, AuthSMTP or SMTP2GO?
As of Nov 12, 2026, only SMTP2GO has a free plan. AuthSMTP does not.
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.