Vatsal Shah If you are planning to get Mailtrap for its spam testing capabilities, I am here to make you rethink your choice.
Mailtrap is good for testing email functionality in development environments, which is exactly where its usefulness ends!
It falls short when it comes to real-world results.
So, if you need to precisely understand how mailbox providers treat your emails in real conditions, Mailtrap will not give you the answers.
That is why I started exploring better tools built specifically for spam testing.
In this blog, I will share the 5 best Mailtrap alternatives that give you accurate spam testing results, actionable insights, and real inbox visibility in 2025.
Mailtrap Alternatives – TOC
TL;DR: 3 Best Mailtrap Alternatives by Use Case
- Inbox Radar by Saleshandy – The overall best Mailtrap alternative if you want a tool that proactively alerts you about spam risks before they hurt your campaign. You get live inbox placement tests with clear insights on what needs fixing to improve sender reputation.
- GlockApps – Best for technical deliverability testing. It breaks down your spam score, runs deep authentication checks, and shows exactly which ISPs are flagging your emails.
- InboxAlly – Best enterprises that want to improve email sender reputation. You can warm up your emails and test inbox placement across real inboxes.
My List of 5 Best Alternatives to Mailtrap for Spam Testing in 2025
I tried and tested multiple deliverability and spam testing tools to see which ones actually show real inbox results instead of just simulated scores.
After weeks of experimenting, I narrowed it down to 5 tools that consistently delivered accurate and actionable insights.
1. Inbox Radar by Saleshandy
If you are doing B2B outreach and want to see how your emails perform in real inboxes, Inbox Radar by Saleshandy is your best Mailtrap alternative.
You can actually see where your emails are landing in the inbox (Primary, Spam, or other folders) for various email service providers like:
- Google Workspace
- Gmail
- Microsoft Outlook 365
- Outlook
- Zoho
- Yahoo
Moreover, Inbox Radar has over 50 real accounts in its seed list, and 40 of them are professional email accounts.
This is what makes Inbox Radar a highly reliable platform for B2B spam and deliverability testing.
Apart from this, you also get:
- Actionable suggestions to improve your inbox placement rate.
- Authentication records setup check (SPF, DKIM, and DMARC)
- IP and Domain blacklist check over 30+ sources
- Email content check for spaminess (powered by SpamAssassin)
- And more.
Note: Inbox Radar is a standalone product from Saleshandy, which is an AI-powered cold outreach automation platform.
What Made Inbox Radar by Saleshandy Stand Out From Mailtrap
I found the ESP-to-ESP placement report incredibly useful.
It shows how your mailbox provider performs against others.
For example, if you are using Google Workspace, the report will show you how your emails performed when sending to Gmail, Outlook, Zoho, Yahoo, and other providers.
This helps you understand how different providers treat your messages, so you can fix deliverability gaps and also plan your outreach accordingly.
You will not find this level of visibility in Mailtrap.
Lastly, you can also schedule and customize your deliverability tests inside Inbox Radar.
This means you can automatically track inbox placement over time and see how changes in your setup, content, or sending volume affect results.
Pricing (Billed Annually)
Inbox Radar has 2 paid plans:
- Inbox Starter – $23/month (15 placement tests/month)
- Inbox Pro – $79/month (Unlimited tests/month)
You can check out the pricing page to know more.
2. GlockApps
If you want to test where your marketing emails land across different inbox providers, GlockApps is another strong Mailtrap alternative.
With GlockApps, you get:
- Inbox placement testing across many professional and personal ESPs, including international ones
- Spam score check using Spam Assassin, Barracuda, Google Spam Filter, Microsoft Exchange Online Protection (EOP), and Proofpoint
- Email authentication testing (SPF, DKIM, DMARC)
- IP reputation and domain blacklist monitoring
The only drawback I noticed with GlockApps is that it includes a limited number of professional inboxes in its seed list, only around 11, which makes the results less reliable for B2B testing.
It is also on the expensive side if you plan to run tests frequently.
What Made GlockApps Stand Out From Mailtrap
You can see exactly why your emails land in spam or stay in the inbox, broken down by each mailbox provider.
If you’re running campaigns across different domains or client accounts, this makes it easy to spot which sender or setup is dragging down your deliverability.
GlockApps Pricing (Billed Annually)
GlockApps uses a credit-based pricing system, where each test consumes a certain number of credits.
- Credits Pack 1: $16.99 for 3 tests
- Credits Pack 2: $47.99 for 10 tests
- Credits Pack 3: $75.99 for 20 tests
You can buy more credits anytime based on how often you run deliverability tests.
Also Read: Top 5 GlockApps Alternatives For Better Deliverability Testing
3. InboxAlly
If your emails often land in spam or the promotions tab, InboxAlly may be the right tool for you.
It comes in-built with both email warm-up and placement testing.
With InboxAlly, you get:
- Automated inbox interactions such as opens, replies, and moves to the primary inbox
- Real-time reports showing how mailbox providers treat your emails
- Domain reputation tracking and engagement analytics
- Custom training sessions for each sender domain
- Continuous deliverability improvement based on live inbox behavior
The only limitation is that InboxAlly is priced on the higher side, making it better suited for agencies or teams that send large volumes of emails regularly.
What Made InboxAlly Stand Out From Mailtrap
With Mailtrap, you can actually track how your reputation improves over time and see measurable changes in placement across different mailbox providers.
Mailtrap focuses on testing and diagnostics, while InboxAlly helps you validate whether your deliverability fixes are working in real campaigns.
If you want to know more, I’ve written a detailed review of InboxAlly, breaking down its features, pricing, pros, and cons, along with my firsthand experience using it for inbox placement improvement.
InboxAlly Pricing (Billed Annually)
InboxAlly has 4 paid plans.
But, they are all on the expensive side and are more suited for tems with bigger budgets.
- Starter – $149/month
- Plus – $645/month
- Premium – $11,90/month
- Enterprise – Custom
4. ZeroBounce
If you want one tool that handles inbox testing, domain monitoring, and email validation, ZeroBounce is a great Mailtrap alternative.
With ZeroBounce, you get:
- Email Finder and Domain Searches
- Inbox Placement Tests
- Email Server Tests
- Blacklist Monitors
- DMARC Domain Monitoring
- Warmup Seeds and Accounts
All of this comes under one pricing plan.
What Made ZeroBounce Stand Out From Mailtrap
What I like about ZeroBounce is that it gives you everything you need to manage deliverability from one dashboard.
You can test inbox placement, monitor domain reputation, and keep your lists clean without switching tools.
ZeroBounce Pricing (Billed Annually)
ZeroBounce has a freemium plan and 2 paid plans:
- ZeroBounce ONE – $99/month
- ZeroBounce ONE Custom – Customizable based on your requirements.
5. Folderly
The last Mailtrap competitor on my list is Folderly.
It is an AI-based deliverability platform that offers both email warm-up and spam testing, available through different pricing packages.
Talking about its spam and deliverability testing capabilities, it is more suited for basic-level testing since you only get personal and professional inboxes from Gmail and Outlook.
That said, it is quite expensive!
What Made Folderly Stand Out From Mailtrap
To be honest, Folderly is quite basic in terms of what it offers, but it does provide more realistic results compared to Mailtrap.
Since Folderly tests emails using real inboxes instead of simulations, the results you get better reflect how your campaigns will perform in actual sending conditions.
Folderly Pricing (Billed Annually)
Folderly charges you based on the number of tests you want to run.
The base plan includes 100 tests per month and costs $799 per year.
If you want more affordable options, check out my list of 8 Folderly alternatives.
Get Accurate Spam Testing Results
If your goal is to see how your emails perform in real inboxes, these Mailtrap alternatives give you the clarity that Mailtrap cannot.
Each tool serves a specific need, so you can pick what fits your setup best.
Here is a quick summary:
- Inbox Radar by Saleshandy: Best overall alternative for real inbox testing and actionable spam insights.
- GlockApps: Best for technical deliverability audits and detailed spam scoring.
- InboxAlly: Best for improving sender reputation through warm-up and engagement tracking.
- ZeroBounce: Best all-in-one option with inbox testing, domain monitoring, and list validation under one plan.
- Folderly: Best for simple AI-based spam testing and reputation repair.
All of these tools go beyond Mailtrap’s simulated testing and show how mailbox providers treat your emails in real inboxes.
Test regularly, monitor your results, and keep your emails landing where they should be, in the inbox.
Mailtrap Alternatives – FAQs
1. What Is Mailtrap Used for?
Mailtrap is mainly for testing email functionality during development. You can use it to check if your emails render properly, if the subject lines display correctly, and if the links or formatting break anywhere before going live. Additionally, you can spam test your emails to see if they pass basic authentication checks like SPF, DKIM, and DMARC.
But the catch is that these are all these are simulated tests.
2. Why Should I Consider an Alternative to Mailtrap?
Because Mailtrap’s tests are simulated, not real, it can show you if your email looks fine and passes technical checks, but it cannot show where your emails actually land once they hit real inboxes.
If you want to understand how mailbox providers really treat your emails, you need a tool that tests across live accounts and gives you deliverability insights you can act on. That is something Mailtrap does not do.
3. Which Mailtrap Alternative Gives the Most Accurate Spam Testing Results?
Inbox Radar by Saleshandy has been the most reliable for me. It tests across real inboxes, gives you a spam score breakdown, and even tells you what is hurting your deliverability. You can see exactly how mailbox providers treat your emails, which makes it much easier to fix problems before they affect your campaign.
4. Can I Use These Tools for Live Campaigns or Only Testing?
You can use most of them for both. Inbox Radar by Saleshandy and GlockApps are great for pre-send spam testing and live campaign monitoring. InboxAlly focuses more on building and maintaining sender reputation, while ZeroBounce and Folderly are stronger at cleaning lists and auditing deliverability.
If you want to check out more tools, here’s one of the reference blogs I used for my research: 9 Free Email Spam Checkers You Can Use To Land In Inboxes
5. Are There Any Free Spam Testing Tools Like Mailtrap?
Some of them do offer limited free options. You can take a free spam and deliverability test in Inbox Radar to see exactly where your emails land across real inboxes.
