AI Indexes
GTM AI Index
Index › Marketing › Direct mail › Thanks.io vs Reachdesk
Print · October 2026 Edition

Thanks.io vs Reachdesk

Zero of fourteen models named Thanks.io first on the direct prompt; one named Reachdesk. Thanks.io was named by ten of the fourteen models and Reachdesk by twelve and Thanks.io carries 11 labels and Reachdesk 25, so the shares are not directly comparable.

Thanks.io

accepted challenger

founded 2017. Named in two categories this edition.

Reachdesk

accepted challenger

Named in three categories this edition.

First-choice share4%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate0%24%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#6#8A position in a field of 10; printed, not drawn.
Labels1125A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Thanks.io reading right to left. Rank and label count are printed, not drawn.Postalytics was named alongside these two in nine of the fourteen direct answers. Postalytics vs Thanks.io · Postalytics vs Reachdesk · Lob vs Thanks.io

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 print page.

By framing

How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
Thanks.ioFirst choices, of fourteen modelsReachdesk
Direct011 against Reachdesk
Paraphrase00
Comparative00
Budget-constrained20
Scale-constrained00
Negative005 against Reachdesk
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.

Every model, every framing

The eighty-four answers behind the chart above, one cell each: where Thanks.io and Reachdesk 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
GPT-6 Luna
Muse Glimmer 30B
Thanks.io Reachdesk first choice named as an alternative argued againstblank: not namedEach cell is one answer, Thanks.io on the left and Reachdesk on the right.

The direct prompt

The plain question, one answer per model, grouped by where Thanks.io and Reachdesk stood in it.

Reachdesk first, Thanks.io not the choice

1 of 14 modelsThanks.io was named in the answer but not as the choice, or not at all.
Gemini 3.5 FlashReachdesk alternatives: Alyce, Lob, PostGrid, Postal, Postalytics, Sendoso

Neither was the first choice, one was named

3 of 14 modelsThe answer put something else first and named one of the two as an alternative.
Perplexity SonarPostGrid alternatives: Reachdesk
GPT-6 LunaPostalytics alternatives: Lob, Postal, Reachdesk
Muse Glimmer 30BPFL - Printing For Less alternatives: Lob, Postal, Postalytics, Reachdesk, Sendoso

Neither was named

10 of 14 modelsThe answer made no first choice from these two in this category.
Claude Haiku 4.5Postalytics alternatives: Lob, Sendoso
GPT-5.4 miniSendoso alternatives: PFL
Grok 4.1 FastSendoso alternatives: Lob, PostGrid Print & Mail
Mistral SmallPostie alternatives: PFL, Postalytics
DeepSeek V4 FlashPostalytics alternatives: Lob, PFL, Postal, Postie, Sendoso
Llama 4 MaverickPostie alternatives: Postal
Qwen 3.7 FlashSendoso alternatives: CIENCE, Cobro, Lob, PebblePost
Kimi K2Lob, Postal alternatives: PFL, Postalytics
GLM 4.7 FlashXPostalytics alternatives: Lob, PostGrid, Postal, Sendoso
MiniMax M2.5Postalytics alternatives: PFL Direct Mail Platform

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
Level: the same share of first choices.
Thanks.io0%#7 of 9
Reachdesk0%#9 of 9
The full small business standing →
Mid-marketThe figures above
Thanks.io leads by two points.
Thanks.io4%#6 of 10
Reachdesk2%#8 of 10
The full mid-market standing →
Enterprise
The order flips: Reachdesk leads at enterprise.
Reachdesk4%#6 of 8
Thanks.io0%#– of 8
The full enterprise standing →

What the models said about Thanks.io

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

“Click2Mail or thanks.io (pay-as-you-go plan) stand out as the best direct mail automation platforms” Grok 4.1 Fast · budget prompt · first choice
“Thanks.io is the gold standard for low-budget operations.” Gemini 3.5 Flash · budget prompt · first choice

What the models said about Reachdesk

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

“Reachdesk is mentioned as a platform to avoid for high-volume direct mail automation” Mistral Small · negative prompt · hard negative
“Reachdesk has emerged as the premier choice for scaling mid-market B2B organizations that want deep integration, global reach, and reliable ROI without the white-glove price tag of Enterprise Sendoso.” Gemini 3.5 Flash · direct 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.