GTM AI Index
Index Marketing Direct mail › Stannp vs Mailjoy
Print · September 2026 Edition

Stannp vs Mailjoy

Zero of twelve models named Stannp first on the direct prompt; zero named Mailjoy. Stannp was named by nine of the twelve models and Mailjoy by eleven and Stannp carries 21 labels and Mailjoy 19, so the shares are not directly comparable.

Stannp

accepted challenger

Named in one category this edition.

Mailjoy

accepted challenger

Named in one category this edition.

First-choice share7%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate0%11%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#3#8A position in a field of 11; printed, not drawn.
Labels2119A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Stannp reading right to left. Rank and label count are printed, not drawn.Postalytics was named alongside these two in ten of the twelve direct answers. Postalytics vs Stannp · Postalytics vs Mailjoy · Lob vs Stannp

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all twelve 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 print page.

By framing

How many of the twelve models made each the first choice, per way of asking, and how many argued against it.
StannpFirst choices, of twelve modelsMailjoy
Direct00
Paraphrase00
Comparative10
Budget-constrained31
Scale-constrained001 against Mailjoy
Negative201 against Mailjoy
Bars are first choices, 0 to 12 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to twelve.

Across every category in the September 2026 Edition, Stannp and Mailjoy were named in the same answer thirty-nine times, of the 51 answers naming Stannp and the 55 naming Mailjoy. In those answers Mailjoy took the first choice three times and Stannp eight.

Every model, every framing

The seventy-two answers behind the chart above, one cell each: where Stannp and Mailjoy stood in it.
ModelDirectParaphraseComparativeBudget-constrainedScale-constrainedNegative
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
Stannp Mailjoy first choice named as an alternative argued againstblank: not namedEach cell is one answer, Stannp on the left and Mailjoy on the right.

The direct prompt

The plain question, one answer per model, grouped by where Stannp and Mailjoy stood in it.

Neither was the first choice, one was named

1 of 12 modelsThe answer put something else first and named one of the two as an alternative.
MiniMax M2.5Postalytics alternatives: Lob, Postal, Sendoso, Stannp

Neither was named

11 of 12 modelsThe answer made no first choice from these two in this category.
Claude Haiku 4.5PFL alternatives: PostGrid, Sendoso
GPT-5.4 miniSendoso alternatives: PFL
Gemini 3.5 FlashPostalytics, Reachdesk alternatives: Alyce, Lob, Postal
Perplexity SonarPostalytics alternatives: DirectMail.io, Lob, Sendoso
Grok 4.1 FastPostalytics alternatives: Lob, PostGrid, Sendoso
Mistral SmallPostalytics alternatives: Lob, PostGrid, Sendoso
DeepSeek V4 FlashPostalytics alternatives: Lob, PFL, Reachdesk, Sendoso
Llama 4 MaverickPostalytics alternatives: Magileads
Qwen 3.7 FlashPostalytics alternatives: Click2Mail, LetterStream, Sendoso
Kimi K2Postalytics alternatives: Lob, PFL, Sendoso
GLM 4.7 FlashXPostalytics alternatives: Lob, PostGrid, Postal, Reachdesk

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
Stannp leads by four points.
Stannp8%#4 of 9
Mailjoy4%#5 of 9
The full small business standing →
Mid-marketThe figures above
Stannp leads by four points.
Stannp7%#3 of 11
Mailjoy2%#8 of 11
The full mid-market standing →
Enterprise
Level: the same share of first choices.
Stannp0%#– of 9
Mailjoy0%#– of 9
The full enterprise standing →

What the models said about Stannp

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

“Start with Click2Mail (no monthly fees) or Stannp ($0-$12/month) to test direct mail without commitment.” Kimi K2 · budget prompt · first choice
“Safer Alternatives to Consider ... Stannp | Very low | 4.8/5 G2 rating, affordable pricing” Kimi K2 · negative prompt · first choice
“Stannp (4.8/5 on G2) – good address verification, tracking, and support” DeepSeek V4 Flash · negative prompt · first choice

What the models said about Mailjoy

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

“pricing traps for your size: Mailjoy, Click2Mail, Printfection ... likely lack the governance, API depth, and attribution you need” DeepSeek V4 Flash · scale prompt · soft negative
“Mailform, Mailjoy, and similar lightweight tools if you need enterprise governance, complex approvals, or robust automation” Perplexity Sonar · negative prompt · soft negative
“If you want free/cheap testing: Start with Mailjoy or Postalytics free plan” Mistral Small · budget prompt · first choice
“if you are looking for a platform with a simple, self-serve interface, Mailjoy or Click2Mail may be more suitable” Llama 4 Maverick · negative prompt · alternative
“You want simple, self-serve postcards/letters: → Mailjoy or Click2Mail” Qwen 3.7 Flash · comparative prompt · alternative
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.