I Tested 15 Email Deliverability Tools: Here’s What You Should Use

In this guide, I list 15 email deliverability tools. For your reading convenience, I’ll break the list down into 5 sections: 

• Deliverability platforms [jump to section]
• Quick check tools [jump to section]
• Testing tools [jump to section]
• Monitoring tools [jump to section]
• Optimization tools [jump to section]

Disclaimer: Every tool on this list has been tried and tested by our deliverability experts, so you can expect a 100% unbiased list and reviews.

Best email deliverability tools: a snapshot

Click on a deliverability tool to jump ahead to the detailed review.

• Mailtrap Email Delivery Platform is the best for product companies with large sending volumes who are looking for high deliverability and industry-best analytics. 
• Postmark is for developer teams who want a reliable email API and SMTP server for sending transactional and bulk emails. 
• Mailgun is for developer teams who want to send emails or test their inbox placement, validate their lists, and preview their HTML emails in one place.
• MxToolbox is for users who are looking for a free solution for various quick deliverability checks or a high-end tool with advanced monitoring and deliverability features. 
• Sender Score is for people who just want to assess their sender reputation and email configuration for free before jumping to a paid solution.
• Barracuda is for teams who want to check if their IP has been flagged as spam by one of the most aggressive filters out there. 
• GlockApps is for users who need a full-stack tool for testing deliverability, email placement, and security, and can spend an extra few bucks on it.
• SendForensics is for teams who need an all-in-one deliverability platform that provides scoring for email configuration, authentication, and inbox placement.
• ZeroBounce is for people who need a full set of diagnostic tools and deliverability consulting services. 
• Google Postmaster Tools is for teams who want to analyze the performance of emails they send to Gmail users.
• Microsoft SNDS is for teams who need insight into emails they send to Outlook and Hotmail users.
• Yahoo Sender Hub is for teams who want to see how their Yahoo emails are performing.
• Everest by Validity is for heavy-duty users who need various dashboards to track their deliverability in great depth.
• InboxAlly is for people who need to improve their reputation with the most popular mailbox providers.
• TrulyInbox is for users who need to warm up their domains and improve their email deliverability and placement.

And for your convenience, here’s a table with a brief overview of each deliverability tool:

Tool	Use case	Key features	Free plan	Pricing
Mailtrap	Send transactional, marketing, and bulk emails	High inboxing rates, Industry best analytics, Safe and fast scaling	1000 emails per month 100 test emails per month	Basic – from 15$ The most popular Business – from 85$
Postmark	Send transactional, marketing and bulk emails	Global infrastructure, sending streams, real-time analytics	300 emails per day, 9,000 per month, and 500 contacts	From $15
Mailgun	Send transactional emails, test inbox placement, validate lists, preview HTML	Fast delivery rates, Inbox placement, email validation,	1-month trial	From $49
MXToolbox	Quickly check DNS, blacklists, and more	SPF/DKIM, DNS, blacklist, SuperTool	Free to use with an optional paid plan	Delivery center – $129 Plus – $399
Sender Score	Assess sender reputation & config	Reputation score, bounce error lookup	✅	N/A
Barracuda	Check if IP is flagged by Barracuda spam filter	IP blacklist check and removal	✅	N/A
GlockApps	Full-stack testing for placement, spam, security	Inbox Insight, DMARC analyzer, uptime alerts	2 spam tests	From $85
SendForensics	Score email config, auth, placement	Unlimited tests, DMARC/blacklist monitoring	N/A	From $49
ZeroBounce	Diagnose your deliverability and consult with experts	Server analysis, warmup, email finder	1 inbox + 1 server test	From $49
Google Postmaster Tools	Monitor Gmail deliverability metrics	Spam rate, domain/IP rep, compliance, FBL	Free to use	N/A
Microsoft SNDS	Monitor Outlook & Hotmail deliverability	Spam trap hits, complaint rate, filter results	Free to use	N/A
Yahoo Sender Hub	Monitor Yahoo email performance	Modern dashboard, BIMI/AMP, placement tracking	Free to use	N/A
Everest by Validity	Track deliverability with deep analytics	Design tests, IP rep, spam monitoring, FBL	Limited	From $29
InboxAlly	Improve sender reputation with seeded interactions	Seed interactions, click, reply, not spam	Free spam tester	From $149
TrulyInbox	Warm up inbox & improve sender reputation	Simulated real-user interactions, basic analytics	10 emails/day	From $29

*Prices are relevant at the time of writing. I’ve added them in case you need to scale email sending volume and upgrade to a paid plan.

Best email deliverability platforms

Features such as automation, workflows, editors, segmentation, don’t matter unless your emails land in inboxes. So, instead of listing platforms with shiny features, I decided to focus on email deliverability. 

A platform with deliverability features should help you build and maintain a good domain reputation, send your emails, and analyze their performance. Ideally, it should also have testing functionalities to check your spam score, authentication protocols, and sender reputation. In other words, it should provide complete control over your email infrastructure. 

Additionally, all three platforms I’ll share with you in this chapter did well in our deliverability tests we performed recently with free plans in a shared IP environment with identical email templates.

Best email deliverability platform: Mailtrap

G2: 4.8 🌟 Capterra: 4.8 🌟

Mailtrap Email Delivery Platform is designed for product companies with high sending volumes. It’s a perfect choice for companies focused on high email deliverability, in-depth analytics, and growth-focused features.

Mailtrap email deliverability features:

• High inboxing rates 

Mailtrap has high inboxing rates by design, meaning your emails will land in primary inboxes regardless of the plan you choose. For example, here’s how it performed with the free plan on our tests:

Platform	Email placement results	Spam filter rating	Inbox email delivery with top providers
Mailtrap	Inbox: 78.8% Tabs: 4.8% Spam: 14.4% Missing: 2.0%	Google Spam Filter: Not spam; Not phishy Barracuda: Score 0 Spam Assassin: Score: -3.8	Gmail: 67.50% Outlook: 77.78% Hotmail: 100% Yahoo: 55.56%

Now, just imagine the deliverability rates you can reach with dedicated IPs, auto warm up, throttling, and other deliverability features. 

• In-depth analytics

One of Mailtrap’s selling points is its analytics, which include helicopter view dashboards and drill-down reports. Through this dashboard, you can see your deliverability rate, unique open rate, unsubscribes, spam complaints, bounce rate, how your emails perform with various Mailbox Providers, and more.

• Separate bulk stream

For its high-volume email senders, Mailtrap offers a dedicated bulk stream. With its bulk-aware email API, you can send your marketing emails on top of transactional while your deliverability stays the same, all without any additional costs.

• Email sandbox and spam checker

With Mailtrap’s Email Sandbox, you can see how your emails look with the most popular mailbox providers, preview them in HTML, raw, source, etc., get vital header info, and more. 

There’s also the Email Spam Checker, with which you can improve your email deliverability rates and prevent your emails from going to spam by keeping your spam score under 5.

Additionally, you can use Mailtrap’s free checkers to make sure your emails are authenticated with SPF, DKIM, and DMARC or to see if your IP or domain are on blocklists. 

• Deliverability experts

Lastly, you can schedule a free consultation with one of Mailtrap’s deliverability experts, who will tell you how to optimize your sender configuration for the best possible results. We also offer tracking our customers’ Google Postmaster dashboards, so when something is off, we immediately notice them and suggest the needed fixes. 

Pricing

Mailtrap has a variety of plans you can choose from, but most importantly, you get a lot of important deliverability features by default for all plans. Check them out:

Plan	Monthly cost	Email limit	Contacts	Key features
Free	$0	Up to 1,000 emails	Up to 100 contacts	SMTP relay, email API, drag-and-drop editor, webhooks
Basic	From $15	10,000+ emails	Up to 50,000 contacts	Email logs (5 days), body retention, click-rate tracking, HTTPS link branding
Business (the most popular)	From $85	100,000+ emails	Up to 750,000 contacts	Email logs (15 days), dedicated IP, auto warm up
Enterprise	From $750	1,500,000 emails	Up to 5,000,000 contacts	All of the above + priority support, 30 days log retention
Custom	Custom	From 1,500,000	Unlimited	All of the above

For more details, please consult the official Mailtrap pricing page.

Customer experience

Whether we’re talking about Trustpilot, Reddit or Twitter, I’m always happy to see that Mailtrap gets a lot of love on these platforms:

Postmark

G2: 4.6 🌟 Capterra: 4.9 🌟

Postmark is an email service provider that offers a reliable email API and SMTP for transactional messages. It’s a good choice for developer teams who want to send both transactional and bulk emails.

Postmark email deliverability features:

• Stable email infrastructure

Postmark has data centers in multiple locations worldwide, ensuring geographic load balancing so you can enjoy low latency and fast sending from your application/project.

Additionally, Postmark handles IP reputation, blocklists, and all of the protocol-related bits and bobs for their customers. This way, you don’t have to worry about your configuration. Instead, you can focus on sending.

Here’s how it performed in our deliverability tests:

Platform	Email placement results	Spam filter rating	Inbox email delivery with top providers
Postmark	Inbox: 83.3% Tabs: 1.0% Spam: 14.3% Missing: 0.9%	Google Spam Filter: Not spam; Not phishy Barracuda: Score 0 Spam Assassin: Score: -4.3	Gmail: 100% Outlook: 100% Hotmail: 80% Yahoo: 77.78%

• Separate sending stream

Similarly to Mailtrap, Postmark offers a separate sending stream you can use for bulk emails. You can also create a specific sending stream, which can come in handy if you’re sending different types of email. 

• 45 days of full email content history

If you’re into email logs, you’ll be happy to hear that Postmark is not only super detailed but also keeps your content history for 45 days.

• Real-time notifications

Postmark offers webhooks, which you can set up to get real-time notifications for email deliveries, opens, clicks, bounces, and more. 

Pricing

Considering you also get a slider to select the number of emails you want to send and adjust the plans according to your sending needs, I have to say that Postmark has great pricing. Albeit a bit more expensive than some of its competitors out there. Here’s a table that sums it up:

Plan	Monthly cost	Email limit	Key features
Free	$0	100	Email API, SMTP service, Core features like email templates,  analytics, webhooks
Basic	From $15,00	10,000+	Up to 4 users,  SMTP & Rest API,  Up to 5 servers and domains,  Email templates
Pro	From $60,50	50,000+	Up to 6 users,  Up to 30 streams,  Up to 10 signature domains,  All event webhooks,  Stats & open/link,  Tracking APIs
Platform	From $138,00	125,000+	Unlimited users,  Unlimited servers,  Unlimited streams,  Unlimited signature domains,  All event webhooks

For more details, please consult the official Postmark pricing page. 

Customer experience

When it comes to customer experience, for whatever reasons, Postmark isn’t seeing much love on TrustPilot. However, when I went to Reddit or X, I’ve seen a lot of positive remarks like this one:

Mailgun

G2: 4.2 🌟 Capterra: 4.3 🌟

Mailgun is a transactional email API and SMTP service for developers that offers a standalone Optimize suite, a set of features dedicated to improving your deliverability.

Now, I must note that Optimize is a standalone suite, so you pay for it separately. The good thing here is that you can use it in combination with any other ESP; it doesn’t have to be Mailgun specifically.

However, if you want to use Mailgun, you might be interested in how it fared in our deliverability test:

Platform	Email placement results	Spam filter rating	Inbox email delivery with top providers
Mailgun	Inbox: 71.1% Tabs: 3.8% Spam: 23.8% Missing: 1.0%	Google Spam Filter: Not spam; Not phishy Barracuda: Score 0 Spam Assassin: Score: -5.3	Gmail: 100% Outlook: 66.67% Hotmail: 40% Yahoo: 33.33%

Mailgun email deliverability features:

• Mailgun Optimize

With Mailgun Optimize, you can see in which inbox folder your emails land exactly, whether it’s spam, promotions, socials, or the main inbox. 

Additionally, Mailgun included various different mailbox providers in its seed list, which is a big plus since not all mailboxes are equal.

You can also upload your email list and validate it or embed Mailgun’s API in your signup page or form to verify contacts automatically when you collect them. Or integrate it with your preferred CRM.

• Fast delivery at high volumes

Mailgun promises fast delivery at high volumes because of its Rapid Fire Delivery SLA, available on high-tier plans. Essentially, it’s SLA-backed email delivery with infrastructure capable of up to 15,000,000 emails per hour. While it is certainly achievable, it depends on your pricing plan, configuration, and domain reputation.

Also, Mailgun webhook API provides data about delivery events such as accepted, delivered, clicks, spam complaints, unsubscribes, and permanent or temporary failures. And you can configure the webhooks on a domain level. 

• Mailgun Inspect

Mailgun offers another suite of tools for building emails called Mailgun Inspect. You can use it to test email accessibility, image rendering, and email design components like buttons, links, CTAs, etc. 

And the better your emails, the more chances you have of landing in inboxes.

Pricing

Mailgun Optimize offers two different pricing tiers, and you also get one month for free, regardless of which one you choose. Here’s what you get:

Plan	Monthly cost	Key features
Pilot	$49	2,500 email validations, 25 inbox placement tests, 500 email previews
Starter	$99	5,000 email validations, 50 inbox placement tests, 1,000 email previews

And if you want to use Mailgun as your ESP, it has a similar pricing model to Postmark. Meaning, it’s got several tiers with a slider that lets you choose how many emails you want to send per month. Check it out:

Plan	Monthly cost	Email limit	Key features
Free	$0	100 per day	Email API and SMTP,  1 custom sending domain, 2 API keys, 1 day log retention, 1 inbound route
Basic	From $15	10,000+	Email API and SMTP,  1 custom sending domain, 2 API keys, 1 day log retention
Foundation	From $35	50,000+	1,000 custom sending domains, Email template builder and API, 5 days log retention
Scale	From $90	100,000+	SAML SSO, 5,000 email validations, Dedicated IP pools, 30 days log retention

For more details, please consult the official Mailgun pricing page.

Customer experience

From what I’ve found, Mailgun users are mostly satisfied with how it delivers their emails. For example:

Best email deliverability check tools

Email deliverability check tools allow you to quickly assess whether the key factors of your email infrastructure (e.g., email authentication, domain, IP, etc.) are working well.

Some of the criteria I went by when demoing them include:

• Ease of use and speed of the check
• Accuracy of the checks I performed
• Comprehensiveness of the tool

MXToolbox

G2: 4.0 🌟 Capterra: 4.5 🌟  

Launched in 2004, MxToolbox is one of the oldest deliverability testing tools in the industry. It offers a variety of free tools for checking your domain health, and it’s pretty barebones. This makes MxToolbox perfect for people who want to quickly assess their DNS records, check if they’re blacklisted, analyze headers, etc.

For example, you can use MxToolbox’s deliverability tool to quickly validate your domains’ email authentication methods.

Simply send an email to ping@tools.mxtoolbox.com and you’ll get detailed SPF and DKIM information, header analysis, and blacklist reputation report.

Or, visit the SuperTool, an all-in-one solution by MxToolbox, enter your sending domain, IP address, or mail server hostname, and get a report regarding the following:

Pricing

MxToolbox also offers two paid plans for users who need something more than a quick deliverability check. The paid plans include access to multiple monitors for the top 30 blacklists, SPF flattening, email configuration analysis, and quite a bigger email message volume.

The plans are a bit more expensive, but they’re dedicated to enterprise users. Here they are:

Plan	Monthly cost	Key Features	Domain(s)	Email message volume
Free	$0	Free lookups	1	N/A
Delivery Center	$129	Inbox placement analysis Email delivery performance Email configuration analysis and more	5	500,000
Delivery Center Plus	$399	Same as Delivery Center + Advanced email delivery threat tools SPF record flattening and more	5	5,000,000

For more details, please visit the official MxToolbox pricing page.

Sender Score 

G2: N/A Capterra: N/A

Sender Score is a free tool by Validity for people looking to quickly assess their sender reputation and email configuration health.

It’s also super straightforward to use, as all you need to do is open Sender Score in your preferred browser and enter your domain or IP address. You will then see your sending domain information, SSL and sending IP details, and a few other details.

Furthermore, SenderScore also tells you how you compare to others in the industry on the global average.

Another Sender Score feature I liked is the bounce lookup, which tells you why your messages are bouncing just by typing in the error message you get when you bounce. For example, I typed 4.1.2, a common potential issue with bounces, and I was taken to the page with the definition and possible fixes.

Barracuda Reputation Lookup

G2: N/A Capterra: N/A

Barracuda Reputation Lookup is a free tool you can use to check if your IP address is on the Barracuda blocklist, one of the most aggressive spam filters out there. The blocklist is maintained by Barracuda Networks, which flags IPs with a 95% accuracy rate.

According to Barracuda, most emails are flagged because they’re deemed as spam, contain viruses, or they’re sent from improperly configured email servers. 

To find out if your IP is on the list, go to the lookup page, enter your IP or domain, and click on ‘Check Reputation.’ If you are on Barracuda’s block list, you can use the Removal Request.

Note: For a detailed list of reasons why IPs are listed, consult the official Barracuda page. 

Best email deliverability test tools

Now, I’ll show you the best tools you can use to test your email deliverability, from constant monitoring to ongoing optimization.

While I was researching and demoing the tools here, I paid attention to:

• How well they reflect real-world email delivery
• The number of mailbox providers they cover (e.g., Gmail, Outlook, etc.)
• How detailed their analytics and reports are
• How easy to set up and use they are
• The range and the quality of features they offer
• The cost per test and overall pricing model

GlockApps

G2: 3.7 🌟 Capterra: 4.8 🌟 

GlockApps is a full-stack diagnostic tool for deliverability, email placement, and security.

One of its main features is Inbox Insight, with which you can see exactly where your emails are landing, whether it’s the primary inbox, spam folder, other tabs, or if they’re simply missing. 

Then, there is the DMARC Analyzer that provides you with weekly and monthly DMARC digests and sends you reports if something goes wrong. 

Uptime Blacklist Monitoring helps you keep your email authentication records healthy and notifies you if your IP gets blacklisted. So, if you don’t want to check your IP against blacklists manually with MxToolbox or Barracuda, you can use GlockApps to automate the process.

You can also book a 1-hour meeting with one of the GlockApps deliverability consultants. They’ll hear out your deliverability issues, diagnose them, and provide you with solutions on how to solve them.

Pricing

Below is GlockApps’ bundle plan, which includes both its spam and DMARC functionalities:

Plan	Monthly cost	Spam test credits	DMARC analytics	Uptime monitors	IP reputation monitors
Free	$0	2	10,000	5	1
Essential	$85	30	50,000	15	10
Growth	$142	90	100,000	25	20
Enterprise	$185	150	1,000,000	30	25

For more details, please visit the official GlockApps pricing page.

SendForensics

G2: 3.8 🌟 Capterra: 4.5 🌟

SendForensics is an all-in-one deliverability platform that provides scoring for email configuration, authentication, and inbox placement.

With SendForensics, you can monitor your domain and IP health, see if you’ve been blacklisted, see your DMARC failure rate, and more.

You also won’t have to worry about ending up on blacklists cause SendForensics allows you to set up alerts via email, Slack, or webhooks to notify you in real time in case you get blacklisted.

You can also run tests with SendForensics’ seed list to see how your emails are doing with the most popular providers like Gmail or Outlook and see if they’re going to the main inbox or spam. And when it comes to inbox placement with different providers, I have to say that SendForensics is quite thorough.

To round this tool up, you can monitor your DMARC compliance and preview your emails on the most popular clients and devices.

Pricing

SendForensics offers 4 different pricing plans, with the main difference between them being the amount of monthly DMARC reports you get and a number of domains and users. Everything else, such as spam tests, client previews, inbox placements tests, etc., you get unlimited.

Plan	Monthly cost	DMARC reports/mo	Domains	Users
Brand	$49	100,000	2	2
Company	$79	1,000,000	5	5
Agency	$199	10,000,000	15	10
Enterprise	$349	Custom	Custom	Custom

For more details, please visit the official SendForensics pricing page.

ZeroBounce

G2: 4.7 🌟 Capterra: 4.7 🌟 

ZeroBounce started off as an email validation tool but eventually added a suite of email deliverability tools. Now it’s geared for people who need a full set of diagnostic tools and deliverability consulting services.

What makes ZeroBounce different from its competitors is its depth of email server analysis, which checks the following: 

• Header information
• RFC-based testing
• DNS records
• Email ports
• Authentication

Additionally, ZeroBounce also offers placement analytics, as well as email warmup to improve it.

Lastly, ZeroBounce has an email finder, which your outreach team will love. Essentially, it helps you find professional, validated email addresses based on name and domain, which can be useful for generating leads.

Pricing

ZeroBounce has separate pricing plans for validation and deliverability tools. Validation starts at $20,00 per 2,000 emails, whereas the deliverability suite has 4 different tiers based on your quantitative needs:

Plan	Monthly cost	Inbox tests	Email server tests	Domain searches	DMARC monitor domains	Email warmups
Freemium	$0	1	1	10	N/A	N/A
Starter	$39	50	50	1,000	2	N/A
Team	$79	100	100	10,000	5	250
Pro	$199	500	500	25,000	20	750

For more details, please visit the official ZeroBounce pricing page.

Best email deliverability monitoring tools

In this chapter, I’ll break down the free deliverability monitoring tools offered by the most popular inbox providers. 

These tools are important because they help you comply with the latest sender requirements released by the most popular mailbox providers (e.g., Google, Yahoo, Outlook, Apple.). If you don’t comply with these, your emails will be rejected, which directly impacts your deliverability.

Check out our dedicated blog articles for more details:

• Google and Yahoo Email Sender Requirements
• Outlook’s New High-Volume Sender Requirements Update

Google Postmaster Tools

G2: N/A Capterra: N/A 

Google Postmaster Tools is a tool that lets you analyze the performance of emails you send to Gmail users. More specifically, you can monitor:

• Compliance status
• Spam rate
• IP reputation
• Domain reputation
• Feedback loops (FBL)
• Email authentication
• Email encryption
• Delivery errors

To start using Google Postmaster Tools, you will need a regular Google Account or a Google Workspace account and a registered sending domain. For a step-by-step guide on setting up Postmaster, check out our dedicated article on the topic.

Moving on, the tool itself consists of several dashboards, such as the Compliance Status dashboard, which lets you see if you’re compliant with the aforementioned email sender requirements. If you see a ‘Needs work’ status, it means you’ll have to tweak your sending configuration a bit.

Then, there is the spam rate dashboard, which tells you what percentage of your emails have been reported by recipients. To comply with Google’s requirements, you need to be under 0.3%, whereas the industry standard is 0.1%.

Two other very important dashboards are the IP and domain reputation dashboards. Here, you should aim for Medium and High, or yellow and green, since everything below means that ISPs don’t think you’re a legitimate sender and don’t consider your emails trustworthy.

Microsoft SNDS

G2: N/A Capterra: N/A 

Microsoft SNDS is a tool offered by Microsoft that lets you know how your emails sent to Outlook and Hotmail users are performing. It mostly concerns:

• Email IP reputation
• IP address activity
• Spam complaints
• Spam trap hits
• Spam rate

To set up Microsoft SNDS, you need a Microsoft account, the IPV4 address of your sending server, and access to the associated domain’s reverse DNS to verify ownership.

Unlike Postmaster, Microsoft SNDS consists of only one dashboard with many columns for monitoring different things, like the Filter result, for instance. This is likely the most important column since it scores your IP address health based on how many emails you hit Outlook spam filters. 

Right next to the filter result, you’ll find the complaint rate, which shows the percentage of recipients who reported your message as spam. 

You can also see whether you hit a spam trap maintained and managed by Outlook. For example, this would be nearly impossible to detect without Microsoft SNDS.

P.S. We also have an in-depth article breaking down Microsoft SNDS and a video explaining the Outlook high-volume email sender requirements. 👀

Yahoo Sender Hub

G2: N/A Capterra: N/A 

Yahoo Sender Hub is a tool that allows you to monitor the performance of emails you send to your Yahoo contacts. Through its dashboard, you can track your:

• Domain reputation 
• Authentication status
• Spam complaint rates
• IP reputation
• Inbox placement

To use Yahoo Sender Hub, you need a Yahoo account, a verified sending domain, and proper email authentication.

Overall, Yahoo probably has the most modern dashboard out of all inbox providers, which makes sense since it’s a relatively new tool, having launched in 2024. It’s super easy to use and set up and has all the stats you need to comply with Yahoo’s requirements.

Additionally, if you’re feeling tech-savvy, it also supports advanced email technologies, such as AMP or Brand Indicators for Message Identification (BIMI). You can use these to improve your brand visibility in your recipients’ inboxes.

Best email deliverability optimization tools

Email deliverability optimization tools are designed to actively enhance your inbox placement. What I mean by this is that your goal is not only to land in the inbox but to end up in your recipients’ primary folder.

So, I evaluated the following tools based on:

• How effective they are at improving my sender reputation
• How easy to set up, integrate, and use they are
• Whether some of their functionality can be automated
• How sustainable their deliverability improvements are

Everest by Validity 

G2: 4.2 🌟 Capterra: 5.0 🌟

Everest is a platform that provides various dashboards for tracking your email deliverability. Think of it like a highly customizable cockpit for email marketing.

With Everest, you can track basic email engagement metrics, such as opens, uniques, average read time, etc. But you can also get an insight into what % of people skim your emails, what time they read them the most, from which devices, and more.

With Everest, you can track feedback loops for over 30 mailbox providers and get valuable information such as spam complaints. 

Tip: You can also integrate Everest with your Microsoft SNDS and Google Postmaster Tools accounts to monitor your reputation.

However, Everest is not only about dashboards. You can also use it to preview your designs across major devices and mailbox providers, test your subject lines and email content for spam, and see if you’ve passed authentication checks or if you’re on blocklists.

If you want to stay above the competition, Everest allows you to track competitors’ sending patterns and see what they’re doing. This way, you can determine the best performing days in your niche, adjust your email sending configuration, and ensure your messages stand out. 

Pricing

Although slightly on the more expensive side, Everest has pricing plans for businesses of all sizes:

Plan	Elements	Elements Plus	Professional	Enterprise
Monthly cost	From $20	From $100	From $500	Custom
Emails tracked/mo	5k-50k	Up to 100k	1M+/yr	3M+/yr
Inbox placement tests	1-10/mo	10-30/mo	80+/yr	365+/yr
Seed lists	Limited	Limited	Full	Full
Spam trap monitoring	✅	✅	✅	✅
Dedicated IP monitoring	2+ IPs/domains	10+ IPs/domains	10+ IPs/domains	10+ IPs/domains
Validation credits	100-1,400/mo	1,400/mo	500k+/yr	2M+/yr
Design tests	10/mo	10/mo	80+/yr	365+/yr
Users	3	5	10	Unlimited
Trend history	30 days	30 days	90 days	18 months

For more details, please visit the official Everest pricing page.

InboxAlly

G2: 4.6 🌟 Capterra: 5.0 🌟

InboxAlly is a tool that teaches inbox providers to understand that emails coming from your domain are trustworthy and are wanted by your recipients. Think of it as a more advanced form of email warm up that improves both your deliverability, as well as your engagement. 

To achieve this, InboxAlly sends emails to seeded inboxes, automatically opens them and clicks links. Additionally, InboxAlly also has the option to reply to some of the emails, mark them as ‘Not spam’ if they end up in spam, or if they end up in the wrong folder, like ‘Promotion’ for example, move them to the primary one. This makes inbox providers see that your email content is valuable. 

To achieve this, InboxAlly provides you with a list of seed emails you can download and add to your email-sending software. 

Then, you create a sender profile where you choose the engagement actions you want InboxAlly to take. For example, the tool can:

• Warm up your domain
• Open your seed emails
• Click on the links
• Move them to a specific folder
• Mark them as not spam (if they end up in spam)

All of this happens automatically once you send the seed emails.

After sending the emails from your email-sending service, you’ll be able to monitor their activity and inbox placement in the InboxAlly broadcast dashboard.

Oh, and one more thing, InboxAlly offers a free spam tester that doesn’t require either an account or a sign-up. You just send your usual content from your sending address to the InboxAlly audit email, and they’ll send you a free audit and deliverability report.

Pricing

InboxAlly pricing is super simple, as it mostly revolves around the amount of daily seed emails allowance. So, the more you pay, the more you can warm up your emails:

Plan	Monthly cost	Seed emails per day	Sender profiles	Support & extras
Starter	From $149/mo	100	1	Email & chat support
Plus	From $645/mo	500	5	Email & live chat
Premium	From $1,190/mo	1,000-	10	+ progress sessions
Enterprise	Custom	Thousands	Unlimited	Everything from above

For more details, please visit the official InboxAlly pricing page.

TrulyInbox

G2: 3.1 🌟 Capterra: N/A

TrulyInbox is an email warm-up tool that improves your email deliverability and inbox placement by building positive sender reputation for major mailbox providers through gradually sending simulated human-like interactions with other users. 

The tool is pretty straightforward, as all you need to do is add your email account and provide the necessary information like in the screenshot below:

Currently, supported email service providers include:

• Gmail/Gsuite
• Office 365 (nATIV)
• Outlook.com/Hotmail.com/Live.com
• Yahoo Mail
• Zoho
• GoDaddy
• Yandex

Once you’ve added your email account, you configure your preferred warm-up settings by selecting how many emails per day you want to send, reply rate, etc.

Upon starting the process, TrulyInbox adds you to their warm-up pool and starts automatically sending emails from your mailbox to other users simulating real-life user exchanges.

The key phrase here is ‘real-life user exchanges’ because the emails look something like this:

You can also track the inbox placement of your warm-up emails, albeit the analytics are a bit minimal, but they do the job nonetheless.

Pricing

When it comes to pricing, I have to say that TrulyInbox is quite affordable and straightforward. Each plan offers a specific amount of warm-up emails and a reply-rate specific to it, which increases as the cost does. There’s also a free plan and some tech features like warm-up API:

Plan	Monthly cost	Daily warm-up per inbox	Reply rate	Key features
Free	From $0	10 emails	Up to 10%	Limited inboxes, basic warm-up
Starter	From $29	100 emails	Up to 25%	Unlimited inboxes, basic reporting
Growth	From $79	1,000 emails	Up to 45%	Priority sending, deliverability analytics
Scale	From $189	3,000 emails	Up to 60%	Multiple warm-up profiles, advanced reporting
Business	From $289	6,000 emails	Up to 65%	Premium support, team access, API

For more information, please visit the official TrulyInbox pricing page.

Wrapping up

If you’ve made it this far, congratulations! You’re one step closer to becoming an email deliverability expert. 

One last tip to go: Don’t be afraid to mix up the tools on this list. For example, pair Google Postmaster Tools with Microsoft SNDS or use Everest to combine them both. The possibilities are endless.

Also, don’t get caught up in all the email metrics and data and forget to implement best practices. As one Reddit user would put it:

For more actionable tips and tricks, check out our blog, where we’ve paved the way for you with articles such as:

• What Is Email Feedback Loop and Why Is It Important?
• Email Protocols Explained: IMAP vs POP3 vs SMTP [2025] 
• Cold Email Marketing: Definition, Importance, and Guidelines
• 13 Reasons & Solutions for Why Your Emails Are Going to Spam