GlockApps vs Google Postmaster Tools
Eight of fourteen models named GlockApps first on the direct prompt; zero named Google Postmaster Tools. GlockApps was named by fourteen of the fourteen models and Google Postmaster Tools by thirteen and GlockApps carries 57 labels and Google Postmaster Tools 34, so the shares are not directly comparable.
Named in one category this edition.
Google Postmaster Tools
accepted challengerBy Google, Mountain View, California, United States, founded 1998. Named in one category this edition.
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the email deliverability and testing tools page.
By framing
GlockAppsFirst choices, of fourteen modelsGoogle Postmaster ToolsAcross every category in the November 2026 Edition, GlockApps and Google Postmaster Tools were named in the same answer seventy times, of the 161 answers naming GlockApps and the 84 naming Google Postmaster Tools. In those answers Google Postmaster Tools took the first choice fourteen times and GlockApps twenty-six.
Every model, every framing
| Model | DirectGP | ParaphraseGP | ComparativeGP | Budget-constrainedGP | Scale-constrainedGP | NegativeGP |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | | GP | GP | | |
| GPT-5.4 mini | | GP | ||||
| Gemini 3.5 Flash | GP | | | GP | | |
| Perplexity Sonar | GP | GP | GP | GP | GP | |
| Grok 4.20 | | | GP | GP | | GP |
| Mistral Small | GP | GP | | |||
| DeepSeek V4 Flash | | | GP | GP | GP | GP |
| Llama 4 Maverick | | |||||
| Qwen 3.7 Flash | | | GP | GP | ||
| Kimi K2 | | | GP | | ||
| GLM 4.7 FlashX | | | GP | GP | ||
| MiniMax M2.5 | | | | GP | ||
| GPT-6 Luna | GP | | GP | GP | ||
| Muse Glimmer 30B | | GP | GP | GP | GP | |
GlockAppsGP Google Postmaster Tools first choice named as an alternative argued againstblank: not namedEach cell is one answer, GlockApps on the left and Google Postmaster Tools on the right.The direct prompt
GlockApps first, Google Postmaster Tools an alternative
8 of 14 modelsGoogle Postmaster Tools was named in the answer but not as the choice, or not at all.Neither was the first choice, one was named
4 of 14 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
2 of 14 modelsThe answer made no first choice from these two in this category.Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
GlockApps25%#1 of 15GlockApps38%#1 of 19GlockApps8%#3 of 17What the models said about GlockApps
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Seed-list placement testers such as GlockApps, Unspam, or similar tools: useful for directional comparisons, but test accounts do not behave like real subscribers” Perplexity Sonar · negative prompt · soft negative
“GlockApps primarily uses syntax and DNS checks, which can miss subtle delivery issues like greylisting or role account filters.” Muse Glimmer 30B · negative prompt · soft negative
“Tools like GlockApps, Mail-Tester, and similar seed-list platforms have significant limitations” DeepSeek V4 Flash · negative prompt · soft negative
“The best email deliverability tool for a mid-market B2B company is GlockApps, as it offers the best all-in-one diagnostics for mid-market teams.” Llama 4 Maverick · direct prompt · first choice
“GlockApps is cited as the most comprehensive email deliverability platform for testing where mail lands across Gmail, Outlook, Yahoo and others” Muse Glimmer 30B · direct prompt · first choice
“Top-rated for scheduled inbox placement testing, spam scoring, and heatmap reports... Often praised as the best balance of features and cost.” Grok 4.20 · comparative prompt · first choice
What the models said about Google Postmaster Tools
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Five of six in this category shown.
“tools such as Google Postmaster Tools are valuable, but Gmail data can be delayed or unavailable at low volume” Perplexity Sonar · negative prompt · soft negative
“valuable if you send enough to Gmail to get data, but it's not a full inbox placement tester” GPT-5.4 mini · comparative prompt · soft negative
“For maximum budget efficiency, start with Google Postmaster Tools and MXToolbox, which are both free” Claude Haiku 4.5 · budget prompt · first choice
“Best first step for monitoring Gmail delivery, spam reports, authentication, and delivery errors.” GPT-6 Luna · budget prompt · first choice
“If you are starting out, begin with Google Postmaster Tools (free, essential for Gmail data)” Qwen 3.7 Flash · comparative prompt · first choice
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.