Finance AI Index
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Business bill pay · September 2026 Edition

BILL vs Melio

Seven of twelve models named BILL first on the direct prompt; zero named Melio. Both were named by all twelve models and BILL carries 51 labels and Melio 27, so the shares are not directly comparable.

BILL

criticized default

Named in twelve categories this edition.

Melio

accepted challenger

Named in six categories this edition.

First-choice share35%26%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate27%11%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#1#2A position in a field of 10; printed, not drawn.
Labels5127A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, BILL reading right to left. Rank and label count are printed, not drawn.AvidXchange was named alongside these two in nine of the twelve direct answers. BILL vs Ramp · Melio vs Ramp

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 business bill pay page.

By framing

How many of the twelve models made each the first choice, per way of asking, and how many argued against it.
BILLFirst choices, of twelve modelsMelio
Direct701 against BILL · 1 against Melio
Paraphrase70
Comparative43
Budget-constrained0117 against BILL
Scale-constrained101 against BILL · 1 against Melio
Negative005 against BILL · 1 against Melio
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.

The direct prompt

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

BILL first, Melio an alternative

7 of 12 modelsMelio was named in the answer but not as the choice, or not at all.
Perplexity SonarBILL alternatives: AvidXchange, Ramp, Stampli, Tipalti
Grok 4.1 FastBILL alternatives: AvidXchange, Ramp, Stampli, Tipalti
Mistral SmallBILL alternatives: AvidXchange, Finexio
Qwen 3.7 FlashBILL alternatives: AvidXchange, Ramp, Tipalti
Kimi K2BILL alternatives: AvidXchange, Melio, Rillion, Stampli
GLM 4.7 FlashXBILL, Ramp alternatives: AvidXchange, Stampli, Tipalti
MiniMax M2.5AvidXchange, BILL alternatives: Stampli, Tipalti

Neither was the first choice, one was named

3 of 12 modelsThe answer put something else first and named one of the two as an alternative.
Claude Haiku 4.5MineralTree alternatives: BILL, EBizCharge, Rillion, Versapay
GPT-5.4 miniTipalti alternatives: BILL, Ramp
DeepSeek V4 FlashTipalti alternatives: AvidXchange, BILL, Ramp, Stampli

Neither was named

2 of 12 modelsThe answer made no first choice from these two in this category.
Gemini 3.5 FlashStampli alternatives: Airbase, AvidXchange, Ramp, Tipalti
Llama 4 Maverickno first choice

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 thirty-four points.
Melio57%#1 of 7
BILL23%#2 of 7
The full small business standing →
Mid-marketThe figures above
The order flips: BILL leads at mid-market.
BILL35%#1 of 10
Melio26%#2 of 10
The full mid-market standing →
Enterprise
BILL leads by five points.
BILL5%#4 of 9
Melio0%#9 of 9
The full enterprise standing →

What the models said about BILL

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

“BBB rating 1.09/5 (108+ reviews), 188 complaints in 3 years. Common issues: payment delays/holds, poor customer support, unauthorized charges” Grok 4.1 Fast · negative prompt · hard negative
“BILL is widely adopted by nearly half a million businesses, with users citing improved visibility, faster reconciliation, and reduced manual work” Claude Haiku 4.5 · paraphrase prompt · first choice
“For most mid-market B2B companies, BILL is the top choice due to its scalability, broad payment options, and strong AP automation features.” Mistral Small · direct prompt · first choice
“BILL is the heavyweight market leader... It offers the most robust internal controls, audit trails, and customizable approval workflows.” Gemini 3.5 Flash · comparative prompt · first choice

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.

“Likely too lightweight for 500 employees needing controls and audit trails.” Kimi K2 · scale prompt · soft negative
“You run a small business (≤50 invoices/month) and want a friendly UI | Melio (Go plan: 5 free ACH payments).” GLM 4.7 FlashX · comparative prompt · first choice
“The best bill pay platform for businesses on a limited budget is Melio's Go plan, which is $0/month” Llama 4 Maverick · budget prompt · first choice
Also compared
BILL vs RampMelio vs RampThe full business bill pay standing

Comparisons are drawn for the top three products in each category. The output is the models' output; nothing here is a recommendation by the index.