Mail-Tester vs MailGenius
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
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The short answer
Both sides assessedMail-Tester compared with MailGenius
The closest direct comparison: both are spam-score checkers built around sending a message to a generated address. MailGenius charges $23 a month for 60 tests and $39 for unlimited, adds an AI consultant, copywriting analysis, and competitor email testing, and its top tier at $79 tests every email you send automatically. Mail-Tester gives three tests a day free, charges $25 for 500, and adds an API, white-labelling, and resale that MailGenius does not. Take MailGenius for the coaching layer and automatic testing; take Mail-Tester if you want the cheapest credible score or you are embedding it in your own product.
MailGenius compared with Mail-Tester
The closest comparison either product has. Both generate a test address, score the message you send it, and explain the deductions. MailGenius charges $23 a month for 60 tests and $39 for unlimited, and spends the difference on an AI consultant, copywriting analysis, competitor testing, and a $79 tier that tests every email you send automatically. Mail-Tester gives three tests a day free, charges $25 for 500, and offers an API, white-labelling, and per-test resale that MailGenius does not. Take MailGenius for the coaching and the automatic testing; take Mail-Tester for the free tier or to embed the score in your own product.
Choose Mail-Tester if
Anyone who needs a fast, credible answer to whether a specific message is technically clean before sending it, and developers who want that answer inside their own product through an API or an embedded, white-labelled result page.
Choose MailGenius if
Email marketers, copywriters, and small outbound teams who want a fast pre-send spam diagnostic with plain-language reasons, plus continuous automatic testing and blacklist alerting on the top plan.
Side by side
13 attributes| Attribute | Mail-Tester | MailGenius |
|---|---|---|
| Category | Deliverability | Deliverability |
| Starting price | $0 (3 tests per 24 hours), then $10 per month for 50 tests | $0 (free spam test), then $23 per month (Beginner) |
| Pricing model | Free for three tests every 24 hours with no account. Paid subscriptions are priced by monthly test volume, with one-time payment options alongside, and the per-test rate falls as volume rises. Quotas reset monthly and do not roll over. | Freemium, with a free no-account spam test and three published monthly subscription tiers separated by test volume and monitoring capability. |
| Free plan | Three tests in any rolling 24 hours with no account and no card, results kept for seven days, plus free SPF, DKIM, DMARC, and BIMI lookup tools. | A basic spam test available with no account required, covering authentication, content, and blacklist checks for a single message. |
| Free trial | No separate trial; the free three tests a day serve as the evaluation path and do not expire | No fixed-length trial; the free spam test serves as the evaluation path |
| Best for | Anyone who needs a fast, credible answer to whether a specific message is technically clean before sending it, and developers who want that answer inside their own product through an API or an embedded, white-labelled result page. | Email marketers, copywriters, and small outbound teams who want a fast pre-send spam diagnostic with plain-language reasons, plus continuous automatic testing and blacklist alerting on the top plan. |
| Setup time | Under a minute for the free test, with nothing to install or connect. An API or white-label integration is a few hours of developer time. | Minutes for on-demand testing: request an address, send a message, read the result. Configuring the automatic testing on the top plan takes longer, since outgoing mail from your senders has to be routed through the test. |
| Learning curve | Very low to run, moderate to interpret. The report itemises deductions clearly, but knowing which of them genuinely matter, and which are SpamAssassin being pedantic about a template, takes a little experience. | Low. The findings are written for marketers rather than engineers, and the AI consultant explains anything unfamiliar. The conceptual point a buyer must grasp is that a good test score is not proof your list received the mail. |
| Platforms | Web application, JSON API, iframe embed | Web application, Free no-account spam test, Automatic testing of outgoing mail on the top plan |
| Compliance | None published | GDPR |
| Founded | 2014 | 2019 |
| Headquarters | France | United States |
| Ownership | Privately held; the operating company is not named publicly | Privately owned by Troy Ericson, who also operates EmailDeliverability.com and emailMarketing.com |
Strengths and limitations
Mail-Tester
Strengths
- Three genuinely free tests every 24 hours with no account, which is the lowest-friction real answer available anywhere in this category.
- Built on SpamAssassin, so deductions name a specific rule rather than an opaque proprietary score.
- Tests your actual sending path, because you send from the system you will really use rather than through a relay.
- Covers authentication, blacklists, links, HTML, and server configuration in one report rather than across four tools.
Limitations
- It scores a message against a filter; it does not test inbox placement at Gmail, Outlook, and Yahoo the way GlockApps, Unspam, or a seed-list product does.
- No monitoring of any kind. It answers when asked and watches nothing in between, so reputation drift is invisible to it.
- No warming, no sending, and no reputation management, so it is always one tool in a stack rather than the stack.
- The operators publish almost nothing about themselves: no company name, no founders, no location beyond being French, and no compliance documentation.
MailGenius
Strengths
- A genuinely free, no-account spam test that has been the entry point for a large number of senders and is still a complete diagnostic for occasional use.
- Itemized findings with plain-language reasons rather than an opaque score, which makes the output actionable for a marketer.
- AI copy analysis and rewriting sits alongside the technical checks, which is unusual and reflects the fact that filters read content as well as headers.
- Automatic testing of every outgoing message on the top plan turns testing from a discipline into infrastructure.
Limitations
- No documented seed panel composition or provider-by-provider placement statistics, so it produces a diagnosis rather than publishable placement evidence.
- No DMARC aggregate report ingestion, so it cannot tell you who else sends as your domain or drive a p=reject deployment.
- No warming or reputation building at all, so a cold sending domain will keep failing tests no matter how many you run.
- No rendering or dark mode preview testing, which Unspam bundles at a lower price.
Pricing compared
Mail-Tester
Free for three tests every 24 hours with no account. Paid subscriptions are priced by monthly test volume, with one-time payment options alongside, and the per-test rate falls as volume rises. Quotas reset monthly and do not roll over.
- Free$0
- 50 tests a month$10
- 500 tests a month$25
- 2,000 tests a month$80
- 7,500 tests a month$250
Judged as a free tool, Mail-Tester is the best value in this category and it is not close: three real tests a day, built on SpamAssassin, with no account, covers the entire pre-send checking need of a small sender at no cost. Judged as a paid product it is narrow but priced honestly, and the buyers who get the most from it are not individuals at all but products embedding the report through the API and white-label. What it does not do should decide the purchase: no placement testing at named providers, no monitoring, no warming. If the question is whether this specific message is technically clean, nothing is faster or cheaper. If the question is where your mail is landing at Gmail this week, you need GlockApps, Unspam, or a warming platform with testing built in.
MailGenius
Freemium, with a free no-account spam test and three published monthly subscription tiers separated by test volume and monitoring capability.
- Free spam test$0
- Beginner$23
- Genius$39
- Automatic Testing and Domain Monitoring$79
At $39 for unlimited testing with AI copy analysis, MailGenius is fairly priced against the specialist placement platforms, and the free test undercuts the entire category for occasional use. The $79 tier is where the value judgement gets interesting: automatic testing of every outgoing message and unlimited-domain blacklist monitoring is genuinely a different product from an on-demand checker, and no other tool at this price watches continuously in that way. What you are not buying is a documented seed panel with provider-by-provider placement statistics, which is what GlockApps sells, or rendering testing, which is what Unspam bundles. Buy MailGenius for the diagnostic and the copy layer; buy elsewhere if you need publishable placement evidence.
Editorial verdict on each
Mail-Tester
Mail-Tester earns its place in any deliverability stack by being free, fast, and specific. Three tests a day with no account, a score out of ten backed by SpamAssassin, and a report that names the exact rule costing you points is the cheapest useful thing a sender can do before launching a campaign, and the paid tiers are honestly priced for the agencies and products that run it at volume. The API, white-labelling, and micro-payment resale explain why the tool turns up inside other vendors' products, and make it a genuine build-versus-buy answer for anyone adding deliverability checks to their own software. Understand the boundary before relying on it: this is a technical cleanliness check, not a placement test and not a monitor. A ten out of ten tells you nothing about which Gmail tab you landed in, and nothing at all about next week. Use it constantly, for free, alongside a warming and monitoring platform that covers what it deliberately does not.
Read the full Mail-Tester profileMailGenius
MailGenius is the deliverability tool most people have already used without paying for it, and the free no-account test remains a complete diagnostic for occasional senders. The paid product is worth considering for two reasons: the AI copy layer, which treats content as a deliverability variable rather than a marketing one, and the $79 plan's automatic testing of every outgoing message with unlimited-domain blacklist alerting, which no comparable tool offers at that price. Against that, there is no documented seed panel, no DMARC report monitoring, no rendering testing, and no warming, and the vendor is a small owner-operated business attached to a consultancy that will keep offering to sell you help. Buy it if you want to know why a message is likely to be filtered and want the answer in plain language. Do not buy it as a fix for a cold sending domain, because diagnosis is the whole product.
Read the full MailGenius profileMail-Tester profile last reviewed 2026-09-20; MailGenius last reviewed 2026-09-20. Pricing is compiled from public sources and can change without notice. See our methodology.
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Frequently asked questions
6 questionsWhat is the difference between Mail-Tester and MailGenius?
The closest direct comparison: both are spam-score checkers built around sending a message to a generated address. MailGenius charges $23 a month for 60 tests and $39 for unlimited, adds an AI consultant, copywriting analysis, and competitor email testing, and its top tier at $79 tests every email you send automatically. Mail-Tester gives three tests a day free, charges $25 for 500, and adds an API, white-labelling, and resale that MailGenius does not. Take MailGenius for the coaching layer and automatic testing; take Mail-Tester if you want the cheapest credible score or you are embedding it in your own product.
Is Mail-Tester or MailGenius cheaper?
Mail-Tester starts at $0 (3 tests per 24 hours), then $10 per month for 50 tests. MailGenius starts at $0 (free spam test), then $23 per month (Beginner). The billing models differ, so the entry price is rarely the whole cost. Mail-Tester pricing model: Free for three tests every 24 hours with no account. Paid subscriptions are priced by monthly test volume, with one-time payment options alongside, and the per-test rate falls as volume rises. Quotas reset monthly and do not roll over. MailGenius pricing model: Freemium, with a free no-account spam test and three published monthly subscription tiers separated by test volume and monitoring capability.
Does Mail-Tester or MailGenius have a free plan?
Mail-Tester has a free plan. Three tests in any rolling 24 hours with no account and no card, results kept for seven days, plus free SPF, DKIM, DMARC, and BIMI lookup tools. Trial terms: No separate trial; the free three tests a day serve as the evaluation path and do not expire. MailGenius has a free plan. A basic spam test available with no account required, covering authentication, content, and blacklist checks for a single message. Trial terms: No fixed-length trial; the free spam test serves as the evaluation path.
Who should choose Mail-Tester?
Anyone who needs a fast, credible answer to whether a specific message is technically clean before sending it, and developers who want that answer inside their own product through an API or an embedded, white-labelled result page.
Who should choose MailGenius?
Email marketers, copywriters, and small outbound teams who want a fast pre-send spam diagnostic with plain-language reasons, plus continuous automatic testing and blacklist alerting on the top plan.
What are the best alternatives to Mail-Tester and MailGenius?
SaaSTracker profiles 23 products in Email Deliverability & Warming. The Summer 2026 awards in the category went to MailReach (Category Leader), GlockApps (Best Value), InboxDoctor (Momentum). Every profile is compiled from primary sources, so a shortlist can be built from pricing, limitations, and fit rather than from star ratings.
