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Email deliverability and testing tools · October 2026 Edition

Folderly vs Microsoft SNDS

Two of fourteen models named Folderly first on the direct prompt; zero named Microsoft SNDS. Folderly was named by eleven of the fourteen models and Microsoft SNDS by ten and Folderly carries 20 labels and Microsoft SNDS 15, so the shares are not directly comparable.

Folderly

accepted challenger

Named in one category this edition.

Microsoft SNDS

accepted challenger

By Microsoft, Vancouver, Canada, founded 1975. Named in one category this edition.

First-choice share3%3%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate5%0%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#6#7A position in a field of 12; printed, not drawn.
Labels2015A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Folderly reading right to left. Rank and label count are printed, not drawn.GlockApps was named alongside these two in thirteen of the fourteen direct answers. GlockApps vs Folderly · GlockApps vs Microsoft SNDS · Google Postmaster Tools vs Folderly

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

How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
FolderlyFirst choices, of fourteen modelsMicrosoft SNDS
Direct201 against Folderly
Paraphrase00
Comparative00
Budget-constrained02
Scale-constrained00
Negative01
Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.

Across every category in the October 2026 Edition, Folderly and Microsoft SNDS were named in the same answer thirteen times, of the 52 answers naming Folderly and the 41 naming Microsoft SNDS. In those answers Microsoft SNDS took the first choice zero times and Folderly zero.

Every model, every framing

The eighty-four answers behind the chart above, one cell each: where Folderly and Microsoft SNDS stood in it.
ModelDirectMSParaphraseMSComparativeMSBudget-constrainedMSScale-constrainedMSNegativeMS
Claude Haiku 4.5
GPT-5.4 mini
Gemini 3.5 FlashMS
Perplexity SonarMS
Grok 4.1 FastMS
Mistral SmallMS
DeepSeek V4 FlashMSMS
Llama 4 Maverick
Qwen 3.7 FlashMS
Kimi K2
GLM 4.7 FlashXMS
MiniMax M2.5
GPT-6 Luna
Muse Glimmer 30BMS
FolderlyMS Microsoft SNDS first choice named as an alternative argued againstblank: not namedEach cell is one answer, Folderly on the left and Microsoft SNDS on the right.

The direct prompt

The plain question, one answer per model, grouped by where Folderly and Microsoft SNDS stood in it.

Folderly first, Microsoft SNDS not the choice

2 of 14 modelsMicrosoft SNDS was named in the answer but not as the choice, or not at all.
Mistral SmallFolderly, GlockApps alternatives: MailReach, Zoho CRM
MiniMax M2.5Folderly, Mailtrap alternatives: EasyDMARC, MXToolbox

Neither was the first choice, one was named

2 of 14 modelsThe answer put something else first and named one of the two as an alternative.
Claude Haiku 4.5InboxArmy, MailBrace alternatives: Folderly, GlockApps, HubSpot, Mailsoftly
GLM 4.7 FlashXGlockApps, MailReach alternatives: Folderly, Warmy

Neither was named

10 of 14 modelsThe answer made no first choice from these two in this category.
GPT-5.4 miniMailgun Optimize alternatives: GlockApps
Gemini 3.5 FlashAllegrow, GlockApps alternatives: Mailgun Optimize, ZeroBounce
Perplexity SonarGlockApps alternatives: Amplemarket, MailReach, NeverBounce
Grok 4.1 FastGlockApps alternatives: MailReach, Validity Everest, Warmy.io
DeepSeek V4 FlashMailReach alternatives: GlockApps, Google Postmaster Tools, MXToolbox
Llama 4 MaverickGlockApps
Qwen 3.7 FlashGlockApps alternatives: 250ok, Instantly, Kickbox, Lemlist, Valimail, ZeroBounce
Kimi K2GlockApps, Instantly alternatives: HubSpot Sales Hub, MailReach
GPT-6 LunaValidity Everest alternatives: GlockApps
Muse Glimmer 30BGlockApps alternatives: MailReach, Validity Everest

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

The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
Microsoft SNDS leads by two points.
Microsoft SNDS3%#9 of 15
Folderly2%#13 of 15
The full small business standing →
Mid-marketThe figures above
Level: the same share of first choices.
Folderly3%#6 of 12
Microsoft SNDS3%#7 of 12
The full mid-market standing →
Enterprise
The order flips: Folderly leads at enterprise.
Folderly2%#6 of 14
Microsoft SNDS0%#11 of 14
The full enterprise standing →

What the models said about Folderly

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Four of five in this category shown.

“Overpriced for most mid-market teams — many reviewers suggest MailReach as a better-value alternative.” DeepSeek V4 Flash · direct prompt · soft negative
“Folderly and GlockApps are top choices due to their comprehensive features and strong reputations” Mistral Small · direct prompt · first choice
“Folderly or Mailtrap would be the top choices.” MiniMax M2.5 · direct prompt · first choice
“Built specifically for B2B sales teams and lead-generation agencies running cold-email campaigns at scale” Claude Haiku 4.5 · direct prompt · alternative

What the models said about Microsoft SNDS

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.

“Set up Google Postmaster Tools (free) and Microsoft SNDS (free). These are the only tools that provide direct, unvarnished reputation data” Gemini 3.5 Flash · negative prompt · first choice
“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
Also compared

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.