GlockApps vs MailSlurp
GlockApps
glockapps.com
MailSlurp
mailslurp.comSide by side
| Figure | GlockApps | MailSlurp |
|---|---|---|
| Price from | $59/mo | $19.99/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Plans published | 4 | 9 |
| Spec score · Email Testing Software | 9.0 (#2) | 8.9 (#5) |
| Company legal name | The official company-background page identifies GlockApps as doing business as Deluxe Custom Apps LLC. | The legal entity is Pettman OÜ, registered at Rännaku pst 12, Tallinn, Estonia. |
| Company profile | LinkedIn lists GlockApps as privately held software-development company with 11–50 employees and headquarters in Pinedale, Wyoming. | LinkedIn lists MailSlurp as a public IT services company founded in 2018 with 2–10 employees. |
| Inbox placement | Inbox Insight reports whether test emails land in inboxes, spam folders, or subfolders across email providers. | Inbox-placement tests compare delivery across personal and business Gmail and Microsoft mailboxes. |
| Integrations | The company lists Return Path, Mailchimp, SpamAssassin, Amazon SES, SparkPost, Mailgun, SendGrid and Slack among its integrations. | The integrations directory lists 79 items, including SDKs, Playwright, Cypress, Selenium, BrowserStack, Zapier, Power Automate, UiPath, Postman, GraphQL and webhooks. |
| Rating on G2 | 4.2 out of 5 from 29 reviews. | 2.0 out of 5 from 2 reviews |
| Support | GlockApps lists a Help Center and step-by-step tutorials, and says its DMARC support specialists have more than 15 years of experience. | The support page offers guides and direct contact for account, billing, delivery, and technical issues. |
| What it does | GlockApps is a hosted email-deliverability and email-security suite that tests inbox placement, authentication, reputation, blocklists and content. | MailSlurp provides programmable email addresses, phone numbers, messaging APIs and testing workflows for developers and QA teams. |
Plans
MailSlurp
- FreeFree
- FreeFree
- Starter$19.99 a month
- Starter$19.99 a month
- Pro$49.99 a month
- Pro$49.99 a month
- Growth$129.99 a month
- Growth$129.99 a month
- EnterprisePriced on request
In their own words
GlockApps
GlockApps helps marketers and businesses check email deliverability and investigate placement problems before sending campaigns. Inbox Insight shows whether test messages reach inboxes, spam folders, or subfolders at different providers, and checks them against SpamAssassin, Barracuda, Microsoft Exchange Online Protection, Proofpoint, and a Google filter. Reputation tools check IPs and domains against blocklists and report sender scores and placement by IP. Content analysis covers message size, images, and links, with an HTML compatibility checker. DMARC Analytics collects reports, tracks sending sources, and retains reports for a year. Uptime Monitor checks IPs, SPF, DKIM, DMARC, HTTP, TLS, and TCP, with checks configurable as often as every minute. The API supports automated testing, result retrieval, and client management by projects and folders on all plans, including free. GlockApps runs on the web and through an API. Its free plan includes two spam test credits; paid plans start at $59 a month, billed annually at $708.
MailSlurp
MailSlurp provides tools to build, test, and automate email and SMS workflows. Users can create temporary or permanent inboxes and handle messages through APIs, SDKs, SMTP, IMAP, and webhooks. It supports end-to-end tests for scenarios including OTP, MFA, magic links, and load testing, as well as device previews, email audits, and inbox placement checks. Pipelines can route messages and attachments using webhooks, forwarding, and automatic replies. AI extraction can turn emails and attachments such as PDFs and images into structured JSON using prompts, schemas, and OCR. Listed integrations include Playwright, Cypress, Selenium, HubSpot, Braze, Mailchimp, Zapier, and AI assistants through MCP. A REST API and official SDKs cover several programming languages. The free plan has capped allowances, including 500 received emails and 1,000 sandbox sends per month. Starter costs $19.99/mo; custom domains and phone numbers require Pro on Free and Starter plans. MailSlurp is web- and API-accessible.