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Embedded payments platforms · November 2026 Edition

Rainforest vs Square

Zero of fourteen models named Rainforest first on the direct prompt; zero named Square. Rainforest was named by ten of the fourteen models and Square by seven and Rainforest carries 21 labels and Square 10, so the shares are not directly comparable.

Rainforest

accepted challenger

Named in one category this edition.

Square

criticized challenger

Named in seven categories this edition.

First-choice share2%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate0%30%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#4#5A position in a field of 9; printed, not drawn.
Labels2110A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Rainforest reading right to left. Rank and label count are printed, not drawn.Stripe Connect was named alongside these two in twelve of the fourteen direct answers. Stripe Connect vs Rainforest · Stripe Connect vs Square · Finix vs Rainforest

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 embedded payments platforms page.

By framing

How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
RainforestFirst choices, of fourteen modelsSquare
Direct00
Paraphrase10
Comparative00
Budget-constrained01
Scale-constrained00
Negative003 against Square
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 Rainforest and Square stood in it.
ModelDirectParaphraseComparativeBudget-constrainedScale-constrainedNegative
Claude Haiku 4.5
GPT-5.4 mini
Gemini 3.5 Flash
Perplexity Sonar
Grok 4.20
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
Rainforest Square first choice named as an alternative argued againstblank: not namedEach cell is one answer, Rainforest on the left and Square on the right.

The direct prompt

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

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.
DeepSeek V4 FlashStripe Connect alternatives: Adyen for Platforms, Finix, HighRadius, Invoiced, Rainforest
GLM 4.7 FlashXStripe Connect alternatives: Adyen for Platforms, EBizCharge, Finix, Rainforest
Muse Glimmer 30BAdyen for Platforms, Stripe Connect alternatives: Finix, NMI, Payrix, Rainforest, Stax Connect, TreviPay, Unit

Neither was named

11 of 14 modelsThe answer made no first choice from these two in this category.
Claude Haiku 4.5HighRadius alternatives: Adyen for Platforms, AvidXchange, Tipalti
GPT-5.4 miniStripe Connect alternatives: Adyen for Platforms, EBizCharge, Finix
Gemini 3.5 FlashBalance, TreviPay alternatives: Adyen for Platforms, EBizCharge, Finix, Fortis, Stripe Connect
Perplexity SonarStripe Connect alternatives: Adyen for Platforms, Finix
Grok 4.20Stripe Connect alternatives: Adyen for Platforms, Finix
Mistral SmallFinix alternatives: Adyen for Platforms, NMI Payments, Stripe Connect
Llama 4 Maverickno first choice
Qwen 3.7 FlashStripe Connect alternatives: Adyen for Platforms, Chargebee, Dwolla, Tipalti
Kimi K2Finix alternatives: Moov, Stripe Connect
MiniMax M2.5Finix, Stripe Connect alternatives: Adyen for Platforms, NMI, Spreedly
GPT-6 LunaStripe Connect alternatives: Finix, Moov

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
Square leads by two points.
Square2%#5 of 9
Rainforest0%#– of 9
The full small business standing →
Mid-marketThe figures above
Level: the same share of first choices.
Rainforest2%#4 of 9
Square2%#5 of 9
The full mid-market standing →
Enterprise
Level: the same share of first choices.
Rainforest0%#– of 7
Square0%#– of 7
The full enterprise standing →

What the models said about Rainforest

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

“Rainforest is recommended for fast go-live and is purpose-built for vertical SaaS.” Llama 4 Maverick · paraphrase prompt · first choice
“Rainforest is purpose-built payfac-as-a-service for vertical SaaS, with wholesale buy rates and the platform keeping the spread above cost.” Muse Glimmer 30B · direct prompt · alternative
“Rainforest if you want direct network connections and spread-ownership without the 2-4 month integration timeline.” GLM 4.7 FlashX · paraphrase prompt · alternative

What the models said about Square

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

“Weaker for pure software-embedded/ISV use cases—better suited for hardware-integrated retail.” Grok 4.20 · negative prompt · soft negative
“Large processors like Stripe, PayPal, and Square often operate under an "aggregator" model” MiniMax M2.5 · negative prompt · soft negative
“Very small / in-person + online, no dev resources: Square Free plan.” Muse Glimmer 30B · budget prompt · first choice
“they build a secondary backup processor (like Square or Adyen) ready to go live if Stripe locks them out” Qwen 3.7 Flash · negative prompt · alternative
“Square/TBD, or Mollie (depending on geography) tend to have far better support infrastructure” DeepSeek V4 Flash · negative 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.