MailReach vs MXToolbox
Two of fourteen models named MailReach first on the direct prompt; zero named MXToolbox. MailReach was named by eleven of the fourteen models and MXToolbox by twelve and MailReach carries 30 labels and MXToolbox 31, so the shares are not directly comparable.
Named in one category this edition.
Named in two categories 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
MailReachFirst choices, of fourteen modelsMXToolbox
Across every category in the October 2026 Edition, MailReach and MXToolbox were named in the same answer twenty-four times, of the 62 answers naming MailReach and the 72 naming MXToolbox. In those answers MXToolbox took the first choice three times and MailReach four.
Every model, every framing
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | | | | ||
| GPT-5.4 mini | ||||||
| Gemini 3.5 Flash | | | ||||
| Perplexity Sonar | | | | |||
| Grok 4.1 Fast | | | | | | |
| Mistral Small | | | | | ||
| DeepSeek V4 Flash | | | | | ||
| Llama 4 Maverick | | |||||
| Qwen 3.7 Flash | | | | |||
| Kimi K2 | | | | | ||
| GLM 4.7 FlashX | | | | |||
| MiniMax M2.5 | | | | | ||
| GPT-6 Luna | ||||||
| Muse Glimmer 30B | | | | | |
MailReach MXToolbox first choice named as an alternative argued againstblank: not namedEach cell is one answer, MailReach on the left and MXToolbox on the right.The direct prompt
MailReach first, MXToolbox an alternative
2 of 14 modelsMXToolbox was named in the answer but not as the choice, or not at all.Neither was the first choice, one was named
6 of 14 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
6 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
MXToolbox6%#3 of 15MailReach5%#6 of 15MailReach7%#3 of 12MXToolbox5%#4 of 12What the models said about MailReach
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Five of six in this category shown.
“The tool may not accurately reflect deliverability for all B2B scenarios, so approach with caution if your audience is large or uses corporate email systems.” Mistral Small · negative prompt · soft negative
“Tools like GlockApps, MailReach, and Mailtrap vary in real-time validation depth — only some verify addresses at scale before sending.” Muse Glimmer 30B · negative prompt · soft negative
“MailReach is the best budget option for warmup and placement testing bundled into one affordable plan” Claude Haiku 4.5 · budget prompt · first choice
“or MailReach (warm‑up + testing at a lower price)” GLM 4.7 FlashX · direct prompt · first choice
“MailReach is the best overall choice in 2026” DeepSeek V4 Flash · direct prompt · first choice
What the models said about MXToolbox
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of seven in this category shown.
“MxToolbox is an infrastructure diagnostic tool, not a campaign email testing tool... best used only for specific DNS and infrastructure checks, not comprehensive campaign testing.” Claude Haiku 4.5 · negative prompt · hard negative
“Free tools like Mail Tester and MxToolbox handle basic checks but lack the depth for production workflows.” Muse Glimmer 30B · negative prompt · soft negative
“lack depth for production-scale testing, inbox placement simulation, or ongoing monitoring” Grok 4.1 Fast · negative prompt · soft negative
“Best free option: Stack Google Postmaster Tools, Microsoft SNDS, Yahoo Sender Hub, MXToolbox, Mail Tester, AboutMyEmail, and Sender Hub.” GLM 4.7 FlashX · budget prompt · first choice
“free monitoring stack with Google Postmaster Tools, Microsoft SNDS, MXToolbox, and Yahoo Sender Hub” Perplexity Sonar · budget prompt · first choice
“Start with free tools → Google Postmaster Tools + MXToolbox + Mail-Tester free tier” Kimi K2 · budget 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.