MailGenius vs GlockApps in 2026: which one actually fits your stack

MailGenius vs GlockApps: Feature Comparison

GlockApps is the better tool for any team serious about deliverability. MailGenius works as a free gut-check, but a spam score is not inbox placement data. They solve different problems at very different price points.

What Does MailGenius Actually Test?

MailGenius runs your email through SpamAssassin, checks SPF, DKIM, and DMARC authentication, and gives a score out of 10. Fast. Free. Done in 30 seconds, per MailGenius' public feature list.

That's the whole picture. No seed inboxes, no ISP-level placement data, no tab routing test. You learn whether your email triggers spam filters. You don't learn whether it lands in Gmail Primary or Promotions.

MailGenius fits one scenario well: checking infrastructure on a fresh domain before your first campaign. After that, its usefulness flattens fast. It won't flag a Spamhaus listing. It won't tell you Outlook is junking your sends.

What Does GlockApps Test in 2026?

GlockApps sends your email to 90+ real seed inboxes across Gmail, Outlook, Yahoo, and regional providers, then reports where each one landed: primary, promotions, updates, or spam. That's actual placement data, not a proxy for it, per GlockApps' inbox insight documentation.

The platform also runs spam filter tests across SpamAssassin, Barracuda, and SpamCop, monitors IP reputation, and includes DMARC analytics on paid plans. For agencies running 5+ client domains, GlockApps catches a blacklisting before it kills a campaign, not after the client notices dropped replies.

GlockApps Starter at $59/month includes unlimited inbox tests and three months of data history, per GlockApps pricing page. That cost recovers itself the first time you catch a domain issue before a campaign launches.

Pricing: What Do MailGenius and GlockApps Cost?

MailGenius costs nothing at the free tier and $7.99/month for Pro features including priority testing and more detailed reports, per MailGenius pricing page. GlockApps runs $59/month on Starter and $159/month on Growth, which adds more seed inboxes and advanced DMARC reporting, per GlockApps pricing page.

• Under 3,000 emails/month: MailGenius free tier is fine. Don't pay for GlockApps yet.
• 3,000 to 30,000/month: GlockApps Starter at $59 gives inbox placement data that doesn't exist anywhere free.
• Agency managing 10+ client domains: GlockApps Growth at $159, plus a blacklist monitoring workflow. Missing one blacklisting event costs more than a year of the subscription.

The math isn't close once you're sending at volume. A spam score tells you your email cleared a filter. GlockApps tells you if it landed where the prospect actually sees it.

Who Should Use MailGenius vs GlockApps?

Use MailGenius if you're setting up a fresh domain, want to confirm SPF, DKIM, and DMARC are wired correctly, and you're not yet sending at scale. It's a free setup sanity check, not a deliverability monitoring platform.

Use GlockApps if you're running cold email at volume, managing multiple sending domains, or trying to diagnose a drop in open rates. An agency doing outbound for B2B clients has no excuse relying on a free spam scorer when real ISP-level placement data costs $59/month.

If you'd rather have a team handle domain setup, inbox health, and campaign execution all at once, that's what Modern Inbound does for B2B teams.

Scale Outreach Without Hiring SDRs

Most B2B teams underestimate the work before sending: buyer-language research, list logic, DNS, warm-up, deliverability, copy testing, and reply handling. Modern Inbound runs the operating layer so founders can stay focused on sales calls.

Frequently Asked Questions