Google Postmaster Alternatives & Competitors

Prevent inbox placement failure before it destroys revenue.

Key InboxGreen.email features:

Live Reputation Monitoring Incident Detection Engine Blacklist Exposure Scanner DNS & Auth Health Checks

freemium $19 / Monthly (Monitoring Plan $19, FixKit $29, Agency Plan $99)

G-Lock Apps is an interesting tool that might seem simple to some, but is quite essential to most online marketers.

Key GlockApps features:

Email Deliverability Testing Inbox Placement Insights Spam Filter Testing Multiple ESP Support

Exercise dataset for fitness apps: transparent background, animations, no subscription.

Key RepDB features:

WebP Format Benefits JSON Transparency Animations

Try for free freemium $299 / One-off

All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.

Key MxToolBox features:

Ease of Use Comprehensive Tools Speed Free Tier

Email Delivery Platform that delivers just in time.
 Great for businesses and individuals. .

Key Mailtrap features:

Automated Testing HTML/CSS Check Spam Analysis Deliverability Alerts

Open Source freemium

SendForensics offers email analysis and deliverability solutions.

Zenreach is a software program that helps businesses grow through a targeted marketing system.

Key Zenreach features:

Customer Engagement Data Collection Automated Marketing In-store Analytics

Removes invalid emails from your list to prevent email bounces from ruining your deliverability.

Key ZeroBounce features:

Accuracy Comprehensive Reporting Data Enrichment Security and Compliance

Folderly is an all-in-one email deliverability platform to supercharge your email performance. Locate, solve, prevent email deliverability pitfalls, and ensure that your emails reach the Inbox folder. .

Key Folderly features:

Spam Fixing Email Deliverability Testing Email Placement Dashboard with Analytics Technical Setup of Domain DNS and Authentication

Open Source paid Free Trial $120 / Monthly (Folderly Premium)

Monetize your un-used domains and turn them into your own content aggregator with 0 code!

Key Newsy features:

Comprehensive Coverage Fact-Based Reporting Video Content Accessibility

Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.

Key Mail-in-a-box features:

Ease of Setup Full Control Cost-effective Open Source

Open Source

Test the spamminess of your email.

Key Mail Tester features:

User-friendly Interface Detailed Feedback Free Basic Service Spam and Content Analysis

Mlmmj is a simple and slim mailing list manager (MLM) inspired by ezmlm.

Key mlmmj features:

Simplicity Lightweight Open Source Customizability

Cloud Native DMARC.

Key EasyDMARC features:

AI-powered DMARC Report Analyser DMARC, SPF, DKIM cloud management solutions Email source reputation monitoring

Open Source freemium $35.99 / Monthly (2 domains, 100K emails, 3 month data history, 1 user)