GlockApps vs Mail-Tester (2026): which should you pick?
As of Nov 13, 2026, we pick GlockApps: it is third in our ranking of email verification and deliverability tools, though Mail-Tester grades higher (2.8 against 2.2) on value for money, ease of use and platforms.
Checked Oct 18, 2026 and Nov 12, 2026 · graded Oct 18, 2026 and Nov 12, 2026 by ToolGPA
They get the same grade on the free plan and features.
Price, platforms and features side by side. The table says where each price was read and when.
GlockApps
Inbox placement testing with DMARC analytics and uptime monitoring
Mail-Tester
Send an email to a test address and get a spam score out of 10
Which one is for you
Pick GlockApps if
- Fits if you want to see where a campaign lands before it goes out
- Works for agencies reporting on client domains with branded PDFs, or for several small domains on free DMARC
Look elsewhere if
- Pricey if you pay monthly, as Essential is $85 against $59 billed yearly
- Skip it if you need list cleaning or warm-up, as it tests and monitors only
- Tight if a team shares it, as Essential is for one user and 5 users start at Growth, $99 a month billed yearly
- Watch out: credit packs expire, with 3 tests for $16.99 valid for one month
- Not for you if you want integrations, as Google Postmaster Tools is the only one listed
Pick Mail-Tester if
- Fits if you want to check one newsletter or template before sending
- Works for developers who want the score inside their own tool
Look elsewhere if
- Tight if you test more than 3 times a day on free, with results kept for 7 days
- Skip it if you want ongoing monitoring, since it tests one message at a time
- Watch out: the score comes from SpamAssassin and other spam filters differ
- Watch out: prices exclude VAT
How we grade them
| 2.2GPAGlockAppsFair | 2.8GPAMail-TesterGood | |
|---|---|---|
| Value for money | CEssential is $59 a month billed yearly ($85 monthly) for 30 spam tests and 50,000 DMARC messages a month. For DMARC alone that's above its listed rivals dmarcian ($19.99) and EasyDMARC ($35.99), but neither runs placement tests on its priced plans. | BSubscriptions start at $10 a month for 50 tests, level with the $10 cheaper quarter of deliverability tools. A 10-test pack is $5, and prices exclude VAT. |
| Free plan and trial | BA free plan with no card: 10,000 DMARC messages a month for unlimited domains, 5 uptime monitors, 1 IP reputation monitor and 2 spam tests. A small domain can live on the DMARC side; 2 tests won't go far. | B3 tests in any 24 hours with no account, results kept for 7 days. One person checking now and then can live on that. |
| Features | CPlacement tests report inbox, spam or tab by provider, with SpamAssassin scores, authentication checks and 50+ blocklists, and DMARC reports for unlimited domains. But it doesn't clean lists or warm up inboxes; it tests and monitors only. | CA spam score, a configuration report and a JSON API. It uses a stock SpamAssassin setup, so a perfect score does not guarantee inbox placement, and it does one message at a time. It does that job fully, and it is a smaller job. |
| Ease of use | CNo App Store rating on record. A test means sending your email to its seed list, but DMARC needs a DNS record first, and the reports take some know-how to act on. | BNo store rating on record. You send a mail to a displayed address and read the result, so there is nothing to set up. |
| Platforms and integrations | CWeb only, with Google Postmaster Tools as the one connection listed, plus an API and white-label reports. No phone or desktop app. | BWeb only, with a JSON API, an iframe and white-labeling. No desktop or phone app. |
| Best for | seeing where a campaign lands before it goes | checking one email's spam score |
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: GlockApps and Mail-Tester. How we grade
Price against what you get
GlockApps starts at $59 a month and scores 2.0 out of 4 on features, ease of use and platforms. Mail-Tester starts at $10 a month and scores 2.7.
Mail-Tester scores higher and starts $49 a month lower. Of the other email verification and deliverability tools on the chart, 12 score higher than GlockApps for less, and none scores higher than Mail-Tester 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
- GlockApps also covers dMARC.
- Mail-Tester also covers reports.
At a glance
| GlockApps | Mail-Tester | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $59 per month, billed annually ($85 monthly) | $10 per month for 50 tests; or $5 once for 10 tests |
| Free plan | 10,000 DMARC messages a month for unlimited domains, 5 uptime monitors, 1 IP reputation monitor and 2 free spam tests, no card required. | Free web interface: 3 tests per 24 hours, results kept for 7 days. |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Deluxe Custom Apps LLC | Mail Tester LLC |
| Price read from | glockapps.com | mail-tester.com |
| Checked | Oct 18, 2026 | Nov 12, 2026 |
Worth knowing
GlockApps
- Annual plans list yearly allowances (Essential: 360 spam tests and 600,000 DMARC messages a year) rather than monthly ones.
- Annual billing saves about 30%, and monthly prices are much higher: Essential is $85 against $59.
- DMARC Analytics alone is sold from $55 a month for 1 million messages, billed monthly.
- GlockApps has no list verification or warm-up; it tests and monitors only.
Mail-Tester
- Scores come from a stock SpamAssassin setup; the FAQ says other spam filters differ, so a perfect score does not guarantee inbox placement.
- The free version allows 3 tests in 24 hours and keeps results for 7 days; an account with your own prefix keeps them 30 days.
- Prices exclude VAT.
- It tests one message at a time and does not monitor sending over time.
Key features
GlockApps
- Inbox Insight
- Seed-list tests show inbox, spam or tab placement by provider, with SpamAssassin scores, authentication checks and a scan of 50+ blocklists.
- DMARC Analyzer
- Collects DMARC reports for unlimited domains with daily reports, a digest and alerts on suspicious activity; overage costs $2 to $7.50 per 100,000 messages.
- Uptime and IP reputation monitors
- Watches websites, mail servers and sending IPs, and checks SPF, DKIM and DMARC records every two hours.
- Google Postmaster integration
- Brings Google Postmaster Tools data into the dashboard next to test results.
- API and white-label reports
- An API for automated testing, projects and folders for managing clients, and branded PDF reports.
Mail-Tester
- Spam score
- Scores a sent message out of 10 using a default SpamAssassin install, with the sign reversed so that a higher score is better.
- Configuration report
- Reviews the message, the mail server and the sending IP, and lists what is set up correctly and what is not.
- JSON API and iframe
- Paid plans let you embed mail-tester results in your own software.
- White-labeling and custom CSS
- Accounts can restyle the result page and fully white-label it, after contacting the company to authorize their domain.
- Usage statistics and history
- Daily, weekly and monthly usage statistics and a list of the last 30 days of tests, with no ads on results.
Plans
GlockApps
Free$0
2 spam tests, 10,000 DMARC messages a month, 5 uptime monitors and 1 user.
Credits Pack 1$16.99
one-time for 3 spam tests
Credits valid for 1 month. Pack 2 is $47.99 for 10 tests valid 2 months, and Pack 3 $75.99 for 20 valid 3 months.
Essential$59
per month, billed annually ($85 monthly)
30 spam tests and 50,000 DMARC messages a month, 15 uptime monitors, 10 IP reputation monitors and 3 DMARKOFF domains, for one user.
Growth$99
per month, billed annually ($142 monthly)
90 spam tests and 100,000 DMARC messages a month, 25 uptime monitors, 20 IP reputation monitors and 5 users.
Enterprise$129
per month, billed annually ($185 monthly)
For agencies: 150 spam tests and 1 million DMARC messages a month, 30 uptime monitors and 10 users.
CustomCustom
A plan built to order for large senders.
Mail-Tester
Free web interface$0
3 tests in any 24 hours, no account needed, results available for 7 days.
10 Tests$5
one-time
A pack of 10 extra tests at $0.50 each. Larger one-time packs run up to 15,000 tests for $700.
50 Tests / Month$10
per month for 50 tests
Subscription with an account; $0.20 per test.
500 Tests / Month$25
per month for 500 tests
$0.05 per test.
2,000 Tests / Month$80
per month for 2,000 tests
Marked most popular on the page; $0.04 per test.
7,500 Tests / Month$250
per month for 7,500 tests
$0.0333 per test. A 25,000-plus tier is quoted on request.
Ways to pay less
GlockApps
- Annual discount
Save 30% with annual billing
GlockApps lists a 30% saving on annual plans: Essential is $59 a month paid annually ($708) against $85 billed monthly.
Mail-Tester
No public discounts listed.
Common questions
Which is cheaper, GlockApps or Mail-Tester?
As of Nov 12, 2026, Mail-Tester is cheaper to start with: $10 a month, against $59 a month for GlockApps. GlockApps starts at $59 per month, billed annually ($85 monthly), and Mail-Tester starts at $10 per month for 50 tests; or $5 once for 10 tests.
Which has a free plan, GlockApps or Mail-Tester?
As of Nov 12, 2026, both GlockApps and Mail-Tester have a free plan.
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.