What are the best seed testing companies for email marketing?

Email marketer from EmailToolTester.com explains that seed list testing involves sending your email to a list of seed email addresses across various mailbox providers to check where your email lands (inbox, spam, or missing). They recommend GlockApps, MailMonitor, and 250ok (Validity)

Email marketer from Reddit explains that using a combination of seed testing tools and feedback loops is ideal. They suggest GlockApps for seed testing and mention Return Path (now Validity) for reputation monitoring.

Email marketer from Email On Acid shares that seed testing is a useful component of deliverability testing and that it's not the only method to test deliverability. They also recommend Inbox Placement tests, Authentication and Reputation Monitoring.

Marketer from Email Geeks shares that Sparkpost sells Inbox Tracker separately so any sender regardless of ESP can monitor their deliverability.

Email marketer from G2.com shares a list of deliverability testing tools that incorporate seed testing. These include GlockApps, MailMonitor, MXToolbox, SendForensics, Talos Intelligence, and WhatRunsWhere.

Email marketer from Reddit says that they believe that seed testing is still a fundamental part of a deliverability setup, but not enough on it's own and should be combined with other techniques.

Email marketer from Validity.com shares that they offer Everest which contains seed testing that monitors deliverability and ensures your emails reach the inbox. It helps you analyze placement and identify potential issues.

Email marketer from MailMonitor explains that they offer email deliverability monitoring with global seedlist coverage. This helps you monitor your email placement in different inboxes around the world.

Email marketer from Stack Overflow shares that they use a self-built seed list with Gmail, Yahoo, and Hotmail accounts to manually check inbox placement. While not scalable, it offers direct insights for smaller campaigns.

Marketer from Email Geeks shares that Inbox Monster has built an impressive platform for deliverability monitoring and comes with unlimited seed testing.

Email marketer from Email Marketing Forum suggests using a free tool like Mail-Tester in conjunction with a paid service for more comprehensive testing. They mention GlockApps and MailMonitor as popular paid options.

Marketer from Email Geeks shares that Validity's Everest platform will eventually phase out 250ok and Return Path.

Email marketer from Litmus.com shares that seed testing helps identify deliverability problems by sending emails to a list of seed addresses and analyzing the results. Popular tools include GlockApps, MailMonitor, and Validity Everest (formerly 250ok).

Expert from Email Geeks shares a list of seed testing companies including Email Consul, Glockapps, Inboxable, Inbox Monster, Kickbox, Mail Monitor, Postmastery and Validity for all budgets.

Expert from Word to the Wise shares that while seed testing is one component, it should be used in conjunction with other deliverability testing methods for a comprehensive picture of your email program's performance. They mention factors like authentication and reputation monitoring as crucial elements.

Expert from Email Geeks shares that Kickbox offers Seedlist testing, Blocklist Monitoring and alerts, DMARC, and pre-check spam/render testing.

Expert from SpamResource.com explains that seed list testing provides a limited view of deliverability and focuses on inbox placement at specific mailbox providers. It's more of a snapshot in time and may not reflect real-world results due to filtering and personalization.

Documentation from GlockApps explains that their platform offers seed list monitoring, allowing users to send test emails to their seed list and analyze deliverability across various ISPs. This helps in identifying and addressing deliverability issues before a large-scale campaign.

Documentation from Mailjet explains that seed list testing is a method to monitor email deliverability by sending test emails to a list of seed email addresses at various Internet Service Providers (ISPs). The results help you identify potential deliverability issues before you send to your entire contact list.

Documentation from SendGrid explains that seed list testing can help you catch deliverability issues before sending to your entire subscriber list. It involves sending to a small, controlled list of email addresses at various ISPs to monitor placement.

Documentation from SparkPost explains that Inbox Tracker is a deliverability tool that includes seed testing which allows for monitoring of deliverability across a variety of ISPs.