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Invoicing software · September 2026 Edition

BILL vs Xero

Two of twelve models named BILL first on the direct prompt; zero named Xero. Both were named by all twelve models and both carry 26 labels, so the shares below are directly comparable.

BILL

accepted challenger

Named in twelve categories this edition.

Xero

accepted challenger

Named in twenty categories this edition.

First-choice share14%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate4%0%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#3#6A position in a field of 10; printed, not drawn.
Labels2626Equal, which is what makes the shares comparable.
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.Wave vs BILL · Wave vs Xero · Zoho Invoice vs BILL

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 invoicing software 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 modelsXero
Direct20
Paraphrase31
Comparative00
Budget-constrained00
Scale-constrained10
Negative001 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, BILL and Xero were named in the same answer seventy-five times, of the 650 answers naming BILL and the 662 naming Xero. In those answers Xero took the first choice eight times and BILL ten.

Every model, every framing

The seventy-two answers behind the chart above, one cell each: where BILL and Xero 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
BILL Xero first choice named as an alternative argued againstblank: not namedEach cell is one answer, BILL on the left and Xero on the right.

The direct prompt

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

BILL first, Xero an alternative

2 of 12 modelsXero was named in the answer but not as the choice, or not at all.
Grok 4.1 FastBILL alternatives: Chargebee, NetSuite, QuickBooks, Xero
MiniMax M2.5BILL alternatives: Stampli, Tipalti

Neither was the first choice, one was named

8 of 12 modelsThe answer put something else first and named one of the two as an alternative.
Claude Haiku 4.5Sage Intacct alternatives: BILL, DealHub AI, Younium
GPT-5.4 miniNetSuite SuiteBilling alternatives: BILL, Sage Intacct
Gemini 3.5 FlashVersapay alternatives: BILL, Billtrust, Chargebee, Invoiced, Lago, Orb, Quadient AR
Perplexity SonarInvoiced alternatives: BILL, NetSuite, QuickBooks
Mistral SmallInvoiced, SAP alternatives: AvidXchange, BILL, Tipalti
DeepSeek V4 FlashBilltrust, Invoiced alternatives: BILL, Chargebee, HighRadius, Quadient AR, Sage Intacct, Tipalti, Versapay
Qwen 3.7 FlashBillforward alternatives: BILL, ChargeOver, NetSuite SuiteBilling, Vendormedia
Kimi K2HighRadius alternatives: BILL, Billtrust, Invoiced, Versapay

Neither was named

2 of 12 modelsThe answer made no first choice from these two in this category.
Llama 4 Maverickno first choice
GLM 4.7 FlashXInvoiced alternatives: Chargebee, QuickBooks, Zoho Invoice

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
Xero leads by seven points.
Xero7%#5 of 8
BILL0%#– of 8
The full small business standing →
Mid-marketThe figures above
The order flips: BILL leads at mid-market.
BILL14%#3 of 10
Xero2%#6 of 10
The full mid-market standing →
Enterprise
BILL leads by five points.
BILL5%#8 of 13
Xero0%#– of 13
The full enterprise standing →

What the models said about BILL

No label in this category carried a quote.

What the models said about Xero

No label in this category carried a quote.

Also compared
Wave vs BILLWave vs XeroZoho Invoice vs BILLZoho Invoice vs XeroBILL vs InvoicedBILL vs QuickBooksInvoiced vs XeroQuickBooks vs XeroAll fifteen head-to-head pages and the full invoicing software 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.