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B2B payment acceptance · September 2026 Edition

Melio vs BILL

Zero of twelve models named Melio first on the direct prompt; one named BILL. Melio was named by eleven of the twelve models and BILL by twelve and Melio carries 18 labels and BILL 30, so the shares are not directly comparable.

Melio

accepted challenger

Named in six categories this edition.

BILL

accepted challenger

Named in twelve categories this edition.

First-choice share9%4%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.

Negative rate22%17%Negative labels as a share of the product's labels, 0 to 100.

Rank in category#5#7A position in a field of 13; printed, not drawn.

Labels1830A count; the two differ.

The two percentage rows are drawn on one 0 to 100 track, Melio reading right to left. Rank and label count are printed, not drawn.EBizCharge was named alongside these two in ten of the twelve direct answers. Helcim vs Melio · Helcim vs BILL · Versapay vs Melio

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 B2B payment acceptance page.

By framing

How many of the twelve models made each the first choice, per way of asking, and how many argued against it.

MelioFirst choices, of twelve modelsBILL

Direct011 against Melio · 2 against BILL

Paraphrase00

Comparative00

Budget-constrained301 against BILL

Scale-constrained11

Negative003 against Melio · 2 against BILL

Bars are first choices, 0 to 12 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to twelve.

Across every category in the September 2026 Edition, Melio and BILL were named in the same answer 214 times, of the 272 answers naming Melio and the 650 naming BILL. In those answers BILL took the first choice thirty-one times and Melio sixty-eight.

Every model, every framing

The seventy-two answers behind the chart above, one cell each: where Melio and BILL stood in it.

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

Melio

BILL

first choice

named as an alternative

argued againstblank: not namedEach cell is one answer, Melio on the left and BILL on the right.

The direct prompt

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

BILL first, Melio not the choice

1 of 12 modelsMelio was named in the answer but not as the choice, or not at all.

Kimi K2BILL, EBizCharge alternatives: Paystand, Stripe

Neither was the first choice, one was named

1 of 12 modelsThe answer put something else first and named one of the two as an alternative.

Claude Haiku 4.5no first choice alternatives: AvidXchange, BILL, MineralTree, Tipalti, Versapay

Neither was named

10 of 12 modelsThe answer made no first choice from these two in this category.

GPT-5.4 miniEBizCharge alternatives: Adyen, Checkout.com, Paymode

Gemini 3.5 FlashEBizCharge alternatives: Paystand, Resolve Pay, Versapay

Perplexity SonarEBizCharge alternatives: HighRadius, Paystand, Worldpay

Grok 4.1 FastStripe alternatives: Billtrust, EBizCharge, HighRadius, Versapay

Mistral SmallEBizCharge alternatives: Helcim, HighRadius, Plooto

DeepSeek V4 FlashHighRadius, Versapay alternatives: Helcim, Paystand, Stripe, Tipalti

Llama 4 MaverickHighRadius alternatives: EBizCharge, Worldpay

Qwen 3.7 FlashVersapay alternatives: EBizCharge, Paystand

GLM 4.7 FlashXEBizCharge alternatives: Plooto, Stripe, Worldpay

MiniMax M2.5EBizCharge, Helcim alternatives: Adyen, Plooto, Stripe, Tipalti

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

Melio leads by five points.

Melio#2 of 10

BILL#3 of 10

The full small business standing →

Mid-marketThe figures above

Melio leads by four points.

Melio#5 of 13

BILL#7 of 13

The full mid-market standing →

Enterprise

Level: the same share of first choices.

Melio#– of 10

BILL#10 of 10

The full enterprise standing →

What the models said about Melio

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

“Melio has received feedback about payment holds, account suspensions, and slow customer support” Mistral Small · negative prompt · soft negative

“While popular for its free tier and clean interface, operational friction is common” Kimi K2 · negative prompt · soft negative

“Limitations: Less robust ERP integrations compared to BILL” Kimi K2 · direct prompt · soft negative

What the models said about BILL

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

“Platforms to Approach with High Caution or Avoid ... Bill.com: ... the unexpected holding of funds or delays in payouts” Qwen 3.7 Flash · negative prompt · hard negative

Also compared

Helcim vs Melio Helcim vs BILL Versapay vs Melio Versapay vs BILL EBizCharge vs Melio EBizCharge vs BILL Billtrust vs Melio Billtrust vs BILL Melio vs Stripe Melio vs HighRadius Stripe vs BILL BILL vs HighRadius All twenty-eight head-to-head pages and the full B2B payment acceptance standing

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.