Every category where a model named Sendoso for a mid-market B2B company. Share is first choices across the direct, paraphrase, budget and scale prompts; rank is within every product named in that category.

Category	Function	Share	Rank	Negative rate	Labels	Quadrant
Print	Marketing	4%	5 of 58	22%	45	accepted challenger

Movement

This is the first edition on this tier, so no move can be computed for Sendoso yet. The next is due October 1, 2026. From the next edition this section shows, per buyer segment, whether its share moved by more than the measured noise floor.

By model

How each model treated Sendoso across every prompt where it was named for a mid-market B2B company. Twelve models, six prompts per category.

Model	First choice	Alternative	Mention	Negative	Labels
Claude Haiku 4.5	1	2	0	0	3
GPT-5.4 mini	1	2	0	1	4
Gemini 3.5 Flash	2	0	1	2	5
Perplexity Sonar	0	3	0	0	3
Grok 4.1 Fast	0	2	1	2	5
Mistral Small	0	2	1	0	3
DeepSeek V4 Flash	0	4	0	1	5
Llama 4 Maverick	0	0	2	0	2
Qwen 3.7 Flash	0	3	0	0	3
Kimi K2	0	4	0	1	5
GLM 4.7 FlashX	0	2	0	2	4
MiniMax M2.5	0	2	0	1	3

By framing

Which of the six questions produced the naming. By model says how often; this says asked what. The first-choice count on the right carries the marks of the models that produced it.

FramingLabels by classFirst choices

Direct29 labels4

Paraphrase22 labels4

Comparative30 labels3not counted in share

Budget-constrained8 labelsNone

Scale-constrained13 labelsNone

Negative23 labelsNone

First choiceAlternativeMentionNegative125 labels in all, every segment counted; 8 of the 11 first choices count toward share, since the comparative and negative framings do not. The bar is one segment per label class, to scale within the framing.

What the models said for it

Verbatim evidence the judge attached to positive labels.

“Sendoso is the safest "best overall" pick if you want a broad, mature direct mail automation platform” GPT-5.4 mini · Direct mail · direct prompt · first choice

“Sendoso is the dominant ecosystem for "sending management"” Gemini 3.5 Flash · Direct mail · comparative prompt · first choice

“Sendoso is a top-rated direct mail automation platform” Claude Haiku 4.5 · Direct mail · comparative prompt · first choice

“Sendoso is the industry leader” Gemini 3.5 Flash · Direct mail · paraphrase prompt · first choice

And against it

Verbatim evidence attached to negative labels. A warning on a product with few labels is a warning; on a product with many, it is one voice among them.

“Platforms with Significant Concerns ... Sendoso (and Postal.io - now acquired by Sendoso) Key Red Flags: Non-refundable prepaid balances that expire” Kimi K2 · Direct mail · 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 · Direct mail · negative prompt · hard negative

“High Costs: Can be expensive, especially for larger teams” GLM 4.7 FlashX · Direct mail · negative prompt · hard negative

“Sendoso's pricing and platform fees can be steep for mid-market budgets, and their digital gift card billing model charges upon email open rather than redemption.” Gemini 3.5 Flash · Direct mail · direct prompt · soft negative

Named alongside

The products named in the same answers as Sendoso, over the 125 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and Sendoso was named but was not.

ProductSame answerTook the first choice insteadHead to head

Lob106 of 12529Not in the top three

Postalytics101 of 12544Not in the top three

PostGrid76 of 1259Not in the top three

PFL55 of 1258Not in the top three

Reachdesk55 of 1251Not in the top three

Click2Mail36 of 1253Not in the top three

Postal35 of 1250Not in the top three

Stannp31 of 1254Not in the top three

Mailjoy27 of 1254Not in the top three

Postie19 of 1251Not in the top three

A head-to-head page exists where both products are in a category's top three. The other rows are the same fact without a page behind them, so they link to the product instead.

What carried it into the answer

The sites and pages cited by the answers that named Sendoso. A fact about retrieval, not a lever on the model.

Citations exist only for the models that return a source list, four of the twelve in this edition, so these counts come from 26 of the 125 answers that named Sendoso and are not a share of its labels.

Domains cited

g2.com14

guideflow.com14

postalytics.com14

postgrid.com12

capterra.com11

cience.com11

lob.com10

sendoso.comYour site10

gartner.com9

gitnux.org7

102 of the 112 domain citations in answers naming Sendoso came from somebody else's page.

Pages cited

guideflow.com/blog/direct-mail-automation-software14

cience.com/blog/direct-mail-automation-software11

capterra.com/direct-mail-automation-software10

gartner.com/reviews/market/direct-mail-automation-software8

g2.com/categories/direct-mail-automation6

lob.com/6

postalytics.com/6

thecmo.com/tools/best-direct-mail-marketing-software6

Pages are listed as the models cited them.

Is this your product?

Claim this page

Claiming is free and changes nothing in the data. A claimed page shows a verified contact who is told when each edition publishes and when Sendoso's standing changes by more than the noise floor; the right to propose corrections to the vendor table, meaning names the judge wrote that should or should not read as Sendoso, applied by version and listed in the change log; and a one-line description supplied by the vendor and marked as such.

It does not get any change to labels, shares or verdicts, any preview, or any say over which quotes appear. A verification link goes to your work email; an address at sendoso.com is approved on the spot, any other address is reviewed by hand.

Your name and company appear on the claimed page, or the company alone if you ask below. A title and a LinkedIn address appear there too if you give them, and are left off if you do not. Your email address is never published.