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GTM AI Index
Index › Products › LetterStream · October 2026 Edition
2 categories · Named, not ranked

LetterStream

3Judge labels
1First choices
1Negative labels
3 / 14Models named it
2Categories
October 2026 Edition. Every number here is derived from the raw labels under vendor table v2026-10-05.2, every buyer segment counted.
Standing
2 labels, too few to rank
A product needs 10 labels in a category before a share or quadrant is stated. LetterStream was named 2 times in Direct mail & gifting and 1 other category, where Sendoso led with 25%. The labels and the evidence are below, counted exactly.
By buyer segmentRead the same way at every buyer size.
In direct mail & gifting · each standing computed within its segment · bars are 0 to 100 · the accent bar is the product's own best reading

Standing by category

Every category where a model named LetterStream 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.
CategoryFunctionShareRankNegative rateLabelsQuadrantSince September 2026
Direct mail and gifting platformsMarketing2%13 of 900%1under 10 labels · led by Sendoso at 25%
PrintMarketing0%51 of 680%1under 10 labels · led by Postalytics at 44%=heldSince September 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise. Read over the models both editions asked.

Movement

This is the first edition on this tier, so no move can be computed for LetterStream yet. From the next edition this section shows, per buyer segment and per category, whether its share moved by more than the measured noise floor.

By model

How each model treated LetterStream across every prompt where it was named for a mid-market B2B company. Fourteen models, six prompts per category.
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ModelFirst choiceAlternativeMentionNegativeLabels
Claude Haiku 4.500101
GPT-5.4 mini00000
Gemini 3.5 Flash00000
Perplexity Sonar00000
Grok 4.2000000
Mistral Small10001
DeepSeek V4 Flash00000
Llama 4 Maverick00000
Qwen 3.7 Flash00000
Kimi K200000
GLM 4.7 FlashX00000
MiniMax M2.500000
GPT-6 Luna00000
Muse Glimmer 30B00000

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
Direct0 labelsNone
Paraphrase0 labelsNone
Comparative1 labelNone
Budget-constrained1 label1
Scale-constrained0 labelsNone
Negative1 labelNone
First choiceAlternativeMentionNegative3 labels in all, every segment counted; 1 of the 1 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.

“start with Postalytics (free tier) or LetterStream (pay-as-you-go)” Mistral Small · Direct mail & gifting · budget 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.

No model argued against it.

Named alongside

The products named in the same answers as LetterStream, over the 3 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and LetterStream was named but was not.
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ProductSame answerTook the first choice insteadHead to head
Click2Mail3 of 30Not among the top eight
Sendoso3 of 30Not among the top eight
Mailjoy2 of 30Not among the top eight
Postal2 of 30Not among the top eight
Postalytics2 of 30Not among the top eight
Reachdesk2 of 30Not among the top eight
Lob1 of 31Not among the top eight
PostGrid Print Mail API1 of 31Not among the top eight
Alyce1 of 30Not among the top eight
PRINTgenie1 of 30Not among the top eight
A head-to-head page exists where both products are among a category's top eight. 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 LetterStream. A fact about retrieval, not a lever on the model.

Citations exist only for the models that return a source list, five of the fourteen in this edition, so these counts come from 3 of the 3 answers that named LetterStream and are not a share of its labels.

Domains cited

capterra.com2
g2.com2
guideflow.com2
6sense.com1
accio.com1
automatemarketingapi.weebly.com1
b2bsaasreviews.com1
birdseyepost.com1
blog.click2mail.com1
chili-publish.com1

Thirteen of the thirteen domain citations in answers naming LetterStream came from somebody else's page.

Pages cited

Pages are listed as the models cited them.

What it publishes

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Addresses on letterstream.com
674
subdomains included
Content
354
counted in the table below
Documentation
244
Product · Integration
0 · 0
KindPagesLast 90 days2025-10 to 2026-09LatestCategories named
Blog33122026-08-20Direct mail
Comparison902026-04-08Direct mail
Glossary or explainer802026-03-17Direct mail
Conference or event502026-05-05
News or press102025-12-05
How it is countedHide how it is counted

Every page letterstream.com exposes, subdomains included. Kind is read from the address and title. The last 90 days, the latest date and the twelve months count pages by when they were published, from the site's feeds, a date in the address, or the page's own publication date, read from up to a hundred of its most recently changed pages; a page that says only when it last changed is counted in its kind but not in when, so the recent counts are a floor, and a kind none of whose pages gives a publication date reads undated. An event counts as online when its address or title says so (webinar, on demand, virtual or online summit); a conference, summit, trade show, expo or roadshow that does not say so is counted as a conference or event, which on a vendor's site is mostly in person. Read September 29, 2026.

Follow LetterStream

An email the morning each edition publishes: where this product moved, where it held, and by how much against the noise floor. One address, confirmed by a click; a stop link in every email.

Already following? Everything you follow, with a stop for each.

The company

LetterStream is its own company.
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In its own words

Stated by the vendor, not checked
Positioning
An online print-and-mail service / print-to-mail solution
For
Individuals and businesses (small, medium, to large) who send business-critical mail communications
Price stated
Yes letterstream.com
Starting price
1.27 letterstream.com
Free plan or trial
Free account letterstream.com
Certifications
HIPAA certificationBBB A PlusHIPAA privacy and security complianceHIPAA Compliant Mailings
Hosting
United States
Not stated on the pages read
Integrations, customers

What LetterStream's own pages state, read October 5, 2026: letterstream.com, letterstream.com/pricing, letterstream.com/products. A claimed page can correct any of 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 LetterStream'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 LetterStream, applied by version and listed in the change log; and a one-line description supplied by the vendor and marked as such.

What a new claim receivesHide what a new claim receives

A new claim receives the current edition's vendor brief for LetterStream by email, built from the raw record of the edition. It shows:

  • where LetterStream is named, by buyer and by framing, and which cells hold its first choices;
  • the claims the models make when they name it, ranked, with the strongest and the weakest quoted;
  • its vocabulary against the segment leader's, and the pages the models cited;
  • who was chosen in the answers that did not name LetterStream, and every reason the record gives;
  • a battlecard for each top rival: the head-to-head split, why they win, and the reservation quoted against them;
  • one page of published figures cleared to show a buyer.
The subscriber app

A verification link goes to your work email; an address at letterstream.com is approved on the spot, any other is reviewed by hand. Your email is never published. Claiming gives no say over labels, shares, verdicts or which quotes appear.