GlockApps Alternatives: Top 10 Email Testing Tools in 2025

MailSlurp is a smart and advanced solution that enables testing of the most important aspects of email sending. It allows the user to programmatically test transactional emails and with more efficiency. MailSlurp allows you to test fundamental user engagement by sending actual emails to real email addresses to your application. You can conduct end-to-end email testing to identify any issues and ensure that the email is sent to the intended recipient. This tool can further be used to test entire email functionality, including sending and receiving emails over REST from randomly created inboxes. Users get the option to create unlimited email accounts with auto-forwarding, web hooks, and routing options that can be configured in code or online. You can send contact groups template emails and track the number of times an email has been opened using actual email addresses, test user authentication, forgotten passwords, email verification, and more for your application. You can receive emails in code, test user sign-up processes, store new contacts and attachments to Google Drive, and more using the REST API, developer SDKs, and Zapier integrations.

BOLT by Aiko AI is a Free Email Validation for your apps and websites. The software offers AI-powered tool used to verify email deliverability score. Block fake accounts and monitor the performance via Dashboard. Small, and Medium companies make use of the software.

They want reliable email delivery that looks good and professional. EmailDelivery.com gives they peace of mind with bounceback analysis, multi-IP processing, and advanced analytics. They’ll feel confident that their emails are reaching the right people, on time, every time. By choosing EmailDelivery.com they can host their own email services that run on their favorite hosting provider or on-premises. For free, they can send email over their own IP Addresses with secure connections via our included Velocity MTA, or they can customize their own setup and integrate their preferred SMTP Relays and APIs. For professionals looking for maximum performance out of their email services, EmailDelivery.com offers superior features: automated IP rotation, DNS Round Robin, and unlimited DNS records for even better reporting and tracking. Plus, EmailDelivery.com’s proprietary bounceback analysis filters out bad emails while delivering what’s important to their customers. No matter what size of business they have, EmailDelivery.com provides quality email management solutions that are accurate and secure. With advanced analytics, they can track their campaigns in real time and adhere to email delivery best practices as they create the best engaging email experiences for their customers. Take their business communication to the next level with EmailDelivery.com. Get reliable email delivery now, and keep their business on the move.

360 degree analysis of your current email program. Design recommendations to improve CTOR and hence conversions. Analysis of the tone of the email copies to further improve CTOR. AMP email use case suggestions for your business. A step by step plan to improve email conversion rates. A thorough analysis of your email infrastructure and deliverability.

Octal is an innovative email testing solution meticulously designed to enhance workflow efficiency while maintaining an organized inbox. By enabling users to generate temporary inboxes instantly, Octal simplifies the email testing process, whether for signup flows, password resets, notifications, or marketing campaigns. The platform ensures that every email reaches its intended destination accurately, eliminating the distractions of spam, advertisements, and plus addressing. Moreover, Octal prioritizes security by guaranteeing the receipt of emails while preventing issues such as bounces or misdirected messages. Its scalability allows for the generation of inboxes at any volume without compromising reliability. Additionally, Octal fosters seamless collaboration, empowering teams to work together effortlessly on various projects. For professionals seeking a dependable, scalable, and user-friendly email testing solution, Octal stands out as the premier choice, enabling users to concentrate on their campaigns with assurance while Octal handles the intricacies of email management.

Mailnest is a robust email testing tool that enables IT teams and developers, to test out the quality of the generated emails and improve them accordingly. The tool allows users to capture all of their test emails in a single place. Besides helping to avoid accidental forwarding of test emails to real customers. With Mailnest, IT teams can set up a virtual SMTP server in 2 minutes. They can even evaluate multiple scenarios without creating separate IDs or clearing databases. Developers are also offered access to the real-time source code of the generated emails, where they get to check if everything is up to the mark or not. Also, the tool comes with an error mode that can be used to emulate various error scenarios. Mailnest takes care of the entire email testing process so that users can invest their complete focus on other relevant tasks. Thus saving out a lot of time and effort on the go.

Mailook software is an Email Deliverability Checker used to identify & fix your email deliverability issues in an easy way. It verifies +100 IP & domain blacklist and helps you take direct actions to get whitelisted. Audit email deliverability and return scores to improve it. Generate public links for your Reports and easily share them with your clients, teammates, partners, etc. Professionals, Small and Medium companies make use of the software.

Introducing Resend, the revolutionary API that will transform the way to connect with the customers. Gone are the days when carefully crafted emails end up lost in the vast abyss of spam folders. With Resend, customer can finally guarantee that the messages will reach the right people, at the right time, every single time. Designed specifically for businesses that understand the importance of impactful email communication, Resend is the ultimate solution for building, testing, and delivering transactional emails at scale. Whether the customer is sending order confirmations, password resets, or important updates, Resend ensures that the messages not only reach their intended recipients, but also make a lasting impression. So, what sets Resend apart from the countless other email APIs out there? Well, first and foremost, it understands the value of connecting with humans, rather than getting caught in a never-ending battle with spam filters. With its intelligent algorithms and advanced analytics, Resend optimizes the emails to bypass those pesky filters and land directly in the customers' primary inboxes.

BounceHunter is an online email validation platform used to check deliverability. The software offers tools to clean your email list easily and can check emails easily with single email checker module. The Spam traps and hard bounces used to manage online reputation for business. Marketers, Small and Medium companies make use of the software.

MailSnag is a free plugin that aims to let you send out test emails, but without using your customers’ email addresses, which makes them think that you are spamming them. MailSnag provides false SMTP server credentials, which you can then use to send your development or staging emails to. MailSnag also provides them with different inboxes and authentication data for every mailbox that you choose to create. To change your current test email application to MailSnag’s server, them can use one of its many integrations. MailSnag’s allows them to inspect and capture any emails that have been sent out during the development period using its SMTP server. It also allows them to debug application generated emails, as well as view embedded content, raw data, and attachments. MailSnag currently supports a wide range of languages for their emails, including English, French, Spanish, and Portuguese.

Email Preview Service is an email testing platform that enables you to preview your emails before sending them for improved email analysis, testing of your design, and improving of your email campaign efficiency. It assists you in boosting the engagement of your recipients by giving you a preview of your email before it goes to your recipient's inbox. With Email Preview Service, you can test your email design and determine what needs to be addressed. With the platform’s white-label API, you can get a superb collection of tools for your project to increase the quality of your emails and, as a result, your conversion rates. You can undertake tests by forwarding emails to a specially constructed email account, or by connecting the API to your app. You can gain insights into the finer aspects of your email campaign, beginning with the open-duration in seconds, the email client used, and the actual geo-location. Additionally, you can compare the results of multiple tests sent via several email providers to find which one offers the highest response rate and use that channel for marketing.

Inbox Pirates is an free email preview tool to view HTML emails in notification bars, variable screen-sizes and devices. The software offers tools to test emails on their everyday workflows. It integrates with Google Workspace, MailChimp, Hubspot, and more.

testmail.app is an automated email testing app that helps businesses to test new users’ signups, transactional emails, spam scores, and more. To test new users’ signups, it verifies emails, passwords sign-ins, etc. further, testmail.app evaluates transactional and drip emails as well. It also checks the delivery and spam scores, to test whether the email has been received or not. An inbuilt API within the same helps with parse, receive, spam-test and index of the customer’s emails for easy retrieval, eliminating chances of finding any email in the spam folder. It offers to use JSON API or the powerful Graph API to query the emails. Businesses also get to use the HTTP or GraphQL client of their choice in any language or environment including CI/CD pipelines. testmail.app even facilitates easy collaboration process among multiple team members to test emails, monitor usage and manage projects.

Litmus is an intuitive email marketing tool that aims to help marketers perform at their best. The platform offers a variety of simple-to-use tools, that a team needs to create high-converting emails and get the best out of their marketing strategies. With Litmus, teams get to discuss, remark and consolidate feedback in one place. Moreover, they can also streamline dozens of time-consuming pre-send chores into a single, automated checklist. The software also helps users to continue subject lines check, run spam tests, and even preview emails on more than 90 apps. Overall, the software helps businesses to improve their personalisation and segmentation facilities in real-time. They can apply insights accordingly, generate emails with high conversion rates and eliminate manual proceedings by integrating ESP. Companies working with Litmus also get access to active integration facilities with Chrome, Slack, Trello, HubSpot, SAP and OneDrive.

SmtpMan software is a platform used to manage safe Email Testing to inspect and debug your emails. Tests messages before they reach customer's real inboxes by checking domain to avoid spam filters. Test HTML for support by basic email clients to measure the progress of workflow. The software offers a secure and encrypted to test emails into special inboxes.

Mailtrap is a simple mail transfer protocol (SMTP) testing software that enables users to examine and fix their email samples before forwarding them to clients. The software features a dedicated environment for its user’s email tests, allowing them to make sure that the contents within the sent emails are perfect. It runs continuous and detailed checks through the users’ domain, providing appropriate guidance on how to bypass spam filters. Organisations get to test and fix each part of their message within Mailtrap. They can even inspect HTML to ensure that the generated mails work with the most popular email clients. Team members can share and discuss multiple ideas with each other. They can also invite customers to their inbox to demonstrate the progress levels of a particular project. Further, users can also separate projects by generating new inboxes, in just two clicks. Coming to the security features, Mailtrap arrives with a secured and encrypted server, ensuring top-graded data privacy.

Introducing GetTestMail, the definitive watertight email service for developers - it will transform the way they write tests! GetTestMail’s powerful libraries enable them to write tests completely securely and safeguard against data loss. Their innovative technology takes the worry out of developing, putting the focus back on the creative aspects of software testing. Now, thanks to GetTestMail, they can be sure their projects are always protected. For every project you undertake, they’ll want a reliable service that they can count on; something they can trust with their valuable data and assets. GetTestMail is the perfect choice because it is designed to endure the most extreme conditions. By using GetTestMail, they can worry less about data integrity and focus more on meeting deadlines. They’ve spent countless hours perfecting this product so that they can rely on it to provide watertight security 100% of the time. No more risking data losses; GetTestMail is here to give them the peace of mind they need as a developer. Don’t miss out on this industry-leading email service - sign up now and let GetTestMail take care of all their watertight email needs.

Email on Acid is an email pre-deployment platform that helps companies to deliver perfect emails, improve marketing ROI and maintain their brand reputation simultaneously. The platform enables companies to optimise their email’s pre-deployment checklists. Thus enabling the brand to deliver error-free emails with just a click of a button. From accessibility checks that assure ADA compliance to validating and replacing first names of animated GIFs, the platform offers a variety of click-to-fix tools that fit users’ specific requirements. Also, companies utilising Email on Acid gets access to blocklist domain and spam tests that helps them improve email deliverability rates in no time. Users can check their emails against the 23 most popular spam filters and test their IP address against the most popular block list services. With email previews testing on over 90+ clients and devices, Email on Acid ensures that the generated emails will get displayed, like it has intended to in every inbox. Furthermore, the platform also comes loaded with a variety of necessary tools, empowering team members to collaborate with each other and get their efficiency levels enhanced accordingly.

Mailosaur is an email-testing tool that enables the users to test emails for websites, applications, and products of any type. You can build and test products, automate email tests that work with Cypress and Selenium frameworks with Mailosaur. Mailosaur enables development team and QA teams to capture, test and analyze SMS messages and emails with their existing language or test framework. You can catch bugs, pinpoint defects in workflow like password resets before release or account activation and do manual testing with Mailosaur’s advanced tools and features. Users can make use of a brand new emailing address for every project, test run, or group member to merge the outcome into the existing test framework. Users can create cell numbers that can perform end-to-end tests of workflows, like security verification checks and password resets with Mailosaur. You can prevent mistaken emailing to real customers and even set your own email domain. The tool is available for a free trial and it offers various price variations too to try its premium features.

Imitate Email is the perfect tool for developers and testers creating the next big thing in tech. Costly testing and debugging are a thing of the past, as Imitate Email allows users to automate email flows and makes sure they're processed correctly. Its advanced technology provides attention to detail, ensuring that emails look great and won't get flagged as spam. What's more, developers have access to features like a cross-platform preview function that lets them see how an email looks both on mobile phones and desktop computers. Plus, with the ability to check emails in HTML, text, or raw formats, your testing process will be lightning fast. Whether you're building a brand new application or upgrading an existing one, do it responsibly by using Imitate Email. It's secure, cost-efficient and can automatically test email flows without complicated coding or time-consuming debugging processes. Get back to innovating—try Imitate Email today!