Sendoso vs Mailjoy
One of twelve models named Sendoso first on the direct prompt; zero named Mailjoy. Sendoso was named by twelve of the twelve models and Mailjoy by eleven and Sendoso carries 45 labels and Mailjoy 19, so the shares are not directly comparable.
Named in one category this edition.
Named in one category this edition.
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
SendosoFirst choices, of twelve modelsMailjoy
Across every category in the September 2026 Edition, Sendoso and Mailjoy were named in the same answer twenty-seven times, of the 125 answers naming Sendoso and the 55 naming Mailjoy. In those answers Mailjoy took the first choice four times and Sendoso zero.
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 | | | |
Sendoso Mailjoy first choice named as an alternative argued againstblank: not namedEach cell is one answer, Sendoso on the left and Mailjoy on the right.The direct prompt
Sendoso first, Mailjoy not the choice
1 of 12 modelsMailjoy was named in the answer but not as the choice, or not at all.Neither was the first choice, one was named
8 of 12 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
3 of 12 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
Sendoso4%#5 of 11Mailjoy2%#8 of 11What the models said about Sendoso
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Platforms with Significant Concerns ... Sendoso (and Postal.io - now acquired by Sendoso) Key Red Flags: Non-refundable prepaid balances that expire” Kimi K2 · negative prompt · hard negative
“Non-refundable preloaded funds: Once you add funds to the platform, you cannot withdraw them. This is a major lock-in risk” DeepSeek V4 Flash · negative prompt · hard negative
“High Costs: Can be expensive, especially for larger teams” GLM 4.7 FlashX · negative prompt · hard negative
“Sendoso is the safest "best overall" pick if you want a broad, mature direct mail automation platform” GPT-5.4 mini · direct prompt · first choice
“Sendoso is the dominant ecosystem for "sending management"” Gemini 3.5 Flash · comparative prompt · first choice
“Sendoso is a top-rated direct mail automation platform” Claude Haiku 4.5 · comparative 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
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.