Index › Spend and procurement › Accounts payable automat › Small business › September 2026 Edition

Accounts payable automation for small business buyers

Asked as “accounts payable automation software”, and as “invoice processing automation”, on behalf of a small B2B company. 44 first choices recorded across the direct, paraphrase, budget and scale prompts, twelve models each.

Standing

BILL

Clear leader

41% of first choices, clear leader.

ShowinginAll 41 categories in the September 2026 Edition →

By buyer segment

The same question asked on behalf of a different buyer. Each standing is computed within its segment; they sit side by side and are never added together.

Small business

BILL41%Clear leaderThis page Mid-market

Stampli19%ContestedStanding →Enterprise

Tipalti18%ContestedStanding →

01The standing

Share is the count of first choices across the direct, paraphrase, budget and scale prompts, over all twelve models, for a small B2B company. Ordered by share.

ProductFirst-choice shareNegative rateLabelsQuadrant

BILL21%62endorsed leader

Ramp10%52accepted challenger

Melio7%46accepted challenger

QuickBooks0%17accepted challenger

Show the four products at 0%, ordered by negative rate

Coupa80%10criticized challenger

Tipalti48%25criticized challenger

Stampli29%14criticized challenger

Plooto0%11accepted challenger

Bars are the share of first choices, 0 to 100Every product with at least 10 labels here. Every product name links to its vendor page.

Head to head

Stampli vs BILL Stampli vs Melio BILL vs Melio

Recommended versus criticized

Every product with at least 10 labels here, on both axes. The 30% line names a quadrant, not the verdict above: that one needs more than 40%.

Criticized challengerCriticized default

Negative label rate →

Accepted challengerEndorsed leader

0%First-choice share → · lines at 30% share and 25% negative60%

Key

BILL41%

Ramp27%

Melio20%

QuickBooks7%

Plooto0%

Stampli0%

Tipalti0%

Coupa0%

02What they warned about

Seven of twelve models held their first choice under the paraphrase. Claude Haiku 4.5, Grok 4.1 Fast, Qwen 3.7 Flash, GLM 4.7 FlashX and MiniMax M2.5 changed. A high negative share on a product with few labels is a warning. A low share on a product with many labels is salience, not sentiment.

BILL

21%

13 of 62 labels negative · 9 of 12 models

“BILL (formerly Bill.com)** is actually a top recommendation for small businesses, but it has specific red flags to watch out for regarding integration.” GLM 4.7 FlashX, negative prompt

Basware

100%

7 of 7 labels negative · 7 of 12 models · 6 hard negative

“Enterprise-Grade ERPs (e.g., SAP Concur, Basware, Oracle NetSuite) ... **Why Avoid:** A small business ... will find the learning curve prohibitive” GLM 4.7 FlashX, negative prompt

SAP Concur

89%

8 of 9 labels negative · 7 of 12 models · 6 hard negative

“Enterprise-Grade ERPs (e.g., SAP Concur, Basware, Oracle NetSuite) ... they are generally **wildly oversized** for a small business.” GLM 4.7 FlashX, negative prompt

Coupa

80%

8 of 10 labels negative · 7 of 12 models · 5 hard negative

“Coupa is a comprehensive spend management platform. For a small business, it offers far more feature bloat than needed” Qwen 3.7 Flash, negative prompt

03What they cite

Citations exist only for the models that return a source list: twelve of the twelve in this edition, and all six flagship models on the expanded tier.

Sites the answers cite

68 of 72 answers in this category came back with a source list, from 12 of 12 models: citations where the model returns them, or the search results it consulted. 6 of those lists are Google grounding redirects that name no site and are left out of the counts. 817 links across 201 sites, every framing counted. Ranked by the number of answers carrying the site or page.

ramp.com

vendor site · Ramp40 answers · 62 citations · 11 models

layer3labs.io

28 answers · 28 citations · 9 models

blog.approvalmax.com

vendor site · ApprovalMax27 answers · 28 citations · 9 models

cashflowpick.com

23 answers · 29 citations · 9 models

bill.com

vendor site · BILL20 answers · 22 citations · 9 models

tipalti.com

vendor site · Tipalti20 answers · 21 citations · 9 models

g2.com

16 answers · 26 citations · 9 models

makershub.com

vendor site · MakersHub15 answers · 16 citations · 8 models

invoicefly.com

vendor site · Invoice Fly14 answers · 15 citations · 8 models

conseroglobal.com

14 answers · 14 citations · 8 models

learn.g2.com

14 answers · 14 citations · 8 models

highradius.com

vendor site · HighRadius13 answers · 17 citations · 9 models

Pages the answers cite

The ten pages named in the most answers, by full address. A page here is one the models returned with a recommendation, not one the index endorses.

layer3labs.io/comparisons/best-accounts-payable-automation-software

28 answers · 9 models

blog.approvalmax.com/accounts-payable-software-for-small-business

26 answers · 9 models

ramp.com/blog/accounts-payable/best-ap-software-for-small-businesses

21 answers · 10 models

cashflowpick.com/best-ap-automation-software

19 answers · 8 models

tipalti.com/blog/accounts-payable-software-small-business

16 answers · 9 models

conseroglobal.com/resources/best-accounts-payable-software

14 answers · 8 models

techrepublic.com/article/best-accounts-payable-software

12 answers · 9 models

getyooz.com/blog/accounts-payable-software-small-business

11 answers · 6 models

toolradar.com/guides/best-accounts-payable-software-small-business

11 answers · 9 models

zoneandco.com/articles/top-ap-automation-software-solutions

11 answers · 8 models

04How they answered

Six framings of the same buying question, each sent to every model in a fresh session with search on. One row per model, so a row shows whether it held its answer under rewording, what it named when cost was the constraint, and what it argued against. Computed from the raw judge labels.

ModelDirect“What is the best accounts payable automation software for a small B2B company?”Paraphrase“Which invoice processing automation would you recommend to a small business that sells to other businesses?”Comparative“What are the top AP automation tools for a small team and how do they differ?”Budget-constrained“What is the best accounts payable automation software for a small company with a tight budget?”Scale-constrained“We are a 30 person company evaluating an accounts payable automation software. What should we look at?”Negative“Which AP automation tools should a small business avoid or be cautious about?”

Claude Haiku 4.5BILL, Ramp

Three alternatives

Airbase, MineralTree, Stampli

RhoChanged

Three alternatives

BILL, Melio, Tipalti

against: StampliBILL, Ramp

Two alternatives

Melio, Tipalti

Ramp

One alternative

Melio

no first choicenothing named

GPT-5.4 miniBILL

Three alternatives

ApprovalMax, Melio, Ramp

against: TipaltiBILLHeld

Five alternatives

Billtrust, Invoiced, Melio, Paystand, Plooto

BILL

Three alternatives

Airbase, Melio, Ramp

against: Coupa, TipaltiMelio, Zoho Books + BillPayagainst: BILL, Rampno first choiceagainst: ADP, SAP Concur, Softco

Gemini 3.5 FlashMelio

Four alternatives

BILL, MakersHub, Ramp, Tipalti

MelioHeld

Four alternatives

BILL, Plooto, Ramp, Upflow

Melio

Four alternatives

ApprovalMax, BILL, MakersHub, Ramp

Ramp

Three alternatives

BILL, MakersHub, Melio

against: Stampli, TipaltiRamp

Two alternatives

BILL, Melio

against: AvidXchange, BILL, Coupa, HighRadius, Melio, SAP Concur, Tipalti

Perplexity SonarBILL

Two alternatives

Melio, Ramp

against: TipaltiBILLHeld

Three alternatives

Invoice Fly, QuickBooks, Xero

Ramp

Three alternatives

BILL, Melio, Stampli

against: TipaltiMelio

Three alternatives

QuickBooks, Ramp, Xero

against: BILLno first choiceagainst: Coupa, HighRadius, Medius, Sage Intacct

Grok 4.1 FastBILL

Two alternatives

Melio, Ramp

against: SAP ConcurQuickBooksChanged

Three alternatives

FreshBooks, Xero, Zoho Invoice

against: BILLBILL

Three alternatives

Melio, Plooto, Ramp

against: AvidXchange, Stampli, TipaltiMelio, Rampagainst: AvidXchange, BILL, QuickBooks + add-ons, Stamplino first choiceagainst: AvidXchange, BILL, Basware, Coupa, HighRadius, Ramp, SAP Concur

Mistral SmallBILL

One alternative

Ramp

BILLHeld

Two alternatives

Invoiced, QuickBooks

BILL

Four alternatives

ApprovalMax, Melio, Plooto, Ramp

Melio

Two alternatives

QuickBooks, Xero

no first choiceagainst: Sage Intacctagainst: Basware, Ramp, SAP Concur

DeepSeek V4 FlashBILL

Two alternatives

Melio, Ramp

against: TipaltiBILLHeld

Four alternatives

Melio, QuickBooks, Ramp, Zoho Books

BILL, Ramp

Two alternatives

Melio, Stampli

against: TipaltiMelio

Four alternatives

BILL, Plooto, QuickBooks, Ramp

no first choiceagainst: AvidXchange, BILL, Basware, Coupa, Medius, SAP Concur, Tipalti

Llama 4 MaverickBILL

Three alternatives

DocuClipper, Fueler, Ramp

BILLHeld

Two alternatives

AvidXchange, Medius

Ramp

Three alternatives

BILL, Melio, Tipalti

no first choiceno first choiceagainst: BILL, Ramp, SutiAP, Tipalti

Qwen 3.7 FlashBILL, Ramp

One alternative

Fueler

QuickBooksChanged

Two alternatives

BILL, Invoice Fly

Ramp

Three alternatives

BILL, Melio, Stampli

Ramp

One alternative

Melio

against: BILLno first choiceagainst: Coupa, SAP Aribaagainst: BILL, Basware, Coupa, HighRadius, Melio, Oracle NetSuite, SAP Ariba, Sage Intacct

Kimi K2BILL

Three alternatives

Melio, Ramp, Tipalti

BILLHeld

Two alternatives

FreshBooks, QuickBooks

against: WaveRamp

Four alternatives

ApprovalMax, BILL, Melio, Plooto

Melio, Ramp

Two alternatives

QuickBooks, Xero

against: BILLno first choiceagainst: BILL, Basware, Coupa, HighRadius, Medius, SAP

GLM 4.7 FlashXRamp

Four alternatives

BILL, Melio, Stampli, Tipalti

BILLChanged

One alternative

Ramp

Melio, Ramp

Five alternatives

ApprovalMax, AvidXchange, BILL, Stampli, Tipalti

Ramp

Three alternatives

Invoice Fly, Melio, Zoho Books

no first choiceagainst: BILL, Basware, Melio, Oracle NetSuite, Ramp, SAP Concur, Tipalti

MiniMax M2.5BILL, Ramp

Three alternatives

Melio, Plooto, Stampli

BILL, QuickBooksChanged

Three alternatives

Chargebee, Ramp, Zoho Invoice

BILL, Ramp

Four alternatives

Airbase, Melio, Stampli, Tipalti

Melio, Ramp

Three alternatives

BILL, QuickBooks, Zoho Books

no first choiceagainst: Basware, SAP Concur

Bold is the first choiceAlternatives are counted; the count opens them.What the answer argued against

05The record

One row per call: the version string exactly as returned, whether the model searched, sources cited, and latency. Full answer text is in the free responses file. Download the record

Seventy-two rows: every prompt, every model, every answer.

Prompt	Model	Version string	Time (UTC)	Searched	Sources	Latency
Direct recommendation	Claude Haiku 4.5	`claude-haiku-4-5-20251001`	2026-09-17 20:35	yes	9	8 s
Direct recommendation	GPT-5.4 mini	`gpt-5.4-mini-2026-03-17`	2026-09-17 20:57	yes	5	6 s
Direct recommendation	Gemini 3.5 Flash	`gemini-3.5-flash`	2026-09-17 20:03	yes	8	16 s
Direct recommendation	Perplexity Sonar	`sonar`	2026-09-17 20:14	yes	20	5 s
Direct recommendation	Grok 4.1 Fast	`spacexai/grok-4.1-fast-non-reasoning via vertex`	2026-09-17 20:43	yes	27	16 s
Direct recommendation	Mistral Small	`mistral/mistral-small via mistral`	2026-09-17 17:54	yes	5	4 s
Direct recommendation	DeepSeek V4 Flash	`deepseek/deepseek-v4-flash via fireworks`	2026-09-17 19:51	yes	8	12 s
Direct recommendation	Llama 4 Maverick	`meta/llama-4-maverick via bedrock`	2026-09-17 20:32	yes	5	2 s
Direct recommendation	Qwen 3.7 Flash	`alibaba/qwen3.7-flash via alibaba`	2026-09-17 18:30	yes	5	59 s
Direct recommendation	Kimi K2	`moonshotai/kimi-k2 via novita`	2026-09-17 18:58	yes	10	36 s
Direct recommendation	GLM 4.7 FlashX	`zai/glm-4.7-flashx via zai`	2026-09-17 19:44	yes	14	42 s
Direct recommendation	MiniMax M2.5	`minimax/minimax-m2.5 via minimax`	2026-09-17 20:08	yes	13	47 s
Paraphrase	Claude Haiku 4.5	`claude-haiku-4-5-20251001`	2026-09-17 20:59	yes	9	7 s
Paraphrase	GPT-5.4 mini	`gpt-5.4-mini-2026-03-17`	2026-09-17 20:32	yes	3	7 s
Paraphrase	Gemini 3.5 Flash	`gemini-3.5-flash`	2026-09-17 21:52	yes	10	19 s
Paraphrase	Perplexity Sonar	`sonar`	2026-09-17 19:54	yes	20	5 s
Paraphrase	Grok 4.1 Fast	`spacexai/grok-4.1-fast-non-reasoning via vertex`	2026-09-17 18:06	yes	41	17 s
Paraphrase	Mistral Small	`mistral/mistral-small via mistral`	2026-09-17 19:30	yes	5	5 s
Paraphrase	DeepSeek V4 Flash	`deepseek/deepseek-v4-flash via deepinfra`	2026-09-17 18:05	yes	23	60 s
Paraphrase	Llama 4 Maverick	`meta/llama-4-maverick via bedrock`	2026-09-17 18:06	yes	5	3 s
Paraphrase	Qwen 3.7 Flash	`alibaba/qwen3.7-flash via alibaba`	2026-09-17 20:07	yes	5	18 s
Paraphrase	Kimi K2	`moonshotai/kimi-k2 via novita`	2026-09-17 20:36	yes	18	48 s
Paraphrase	GLM 4.7 FlashX	`zai/glm-4.7-flashx via zai`	2026-09-17 20:03	yes	10	99 s
Paraphrase	MiniMax M2.5	`minimax/minimax-m2.5 via minimax`	2026-09-17 20:44	yes	9	28 s
Comparative	Claude Haiku 4.5	`claude-haiku-4-5-20251001`	2026-09-17 18:14	yes	13	8 s
Comparative	GPT-5.4 mini	`gpt-5.4-mini-2026-03-17`	2026-09-17 20:02	yes	6	15 s
Comparative	Gemini 3.5 Flash	`gemini-3.5-flash`	2026-09-17 19:10	yes	9	23 s
Comparative	Perplexity Sonar	`sonar`	2026-09-17 19:03	yes	18	8 s
Comparative	Grok 4.1 Fast	`spacexai/grok-4.1-fast-non-reasoning via vertex`	2026-09-17 18:57	yes	24	15 s
Comparative	Mistral Small	`mistral/mistral-small via mistral`	2026-09-17 20:47	yes	5	6 s
Comparative	DeepSeek V4 Flash	`deepseek/deepseek-v4-flash via fireworks`	2026-09-17 18:23	yes	12	19 s
Comparative	Llama 4 Maverick	`meta/llama-4-maverick via bedrock`	2026-09-17 17:53	yes	5	2 s
Comparative	Qwen 3.7 Flash	`alibaba/qwen3.7-flash via alibaba`	2026-09-17 18:05	yes	10	36 s
Comparative	Kimi K2	`moonshotai/kimi-k2 via novita`	2026-09-17 20:30	yes	14	30 s
Comparative	GLM 4.7 FlashX	`zai/glm-4.7-flashx via zai`	2026-09-17 20:05	yes	14	135 s
Comparative	MiniMax M2.5	`minimax/minimax-m2.5 via minimax`	2026-09-17 17:58	yes	5	51 s
Budget constrained	Claude Haiku 4.5	`claude-haiku-4-5-20251001`	2026-09-17 19:03	yes	9	7 s
Budget constrained	GPT-5.4 mini	`gpt-5.4-mini-2026-03-17`	2026-09-17 19:25	yes	4	5 s
Budget constrained	Gemini 3.5 Flash	`gemini-3.5-flash`	2026-09-17 18:13	yes	19	24 s
Budget constrained	Perplexity Sonar	`sonar`	2026-09-17 20:41	yes	20	5 s
Budget constrained	Grok 4.1 Fast	`spacexai/grok-4.1-fast-non-reasoning via vertex`	2026-09-17 18:08	yes	27	15 s
Budget constrained	Mistral Small	`mistral/mistral-small via mistral`	2026-09-17 19:47	yes	5	3 s
Budget constrained	DeepSeek V4 Flash	`deepseek/deepseek-v4-flash via fireworks`	2026-09-17 20:40	yes	8	10 s
Budget constrained	Llama 4 Maverick	`meta/llama-4-maverick via bedrock`	2026-09-17 19:16	yes	5	3 s
Budget constrained	Qwen 3.7 Flash	`alibaba/qwen3.7-flash via alibaba`	2026-09-17 19:15	yes	9	34 s
Budget constrained	Kimi K2	`moonshotai/kimi-k2 via novita`	2026-09-17 18:01	yes	8	17 s
Budget constrained	GLM 4.7 FlashX	`zai/glm-4.7-flashx via zai`	2026-09-17 20:57	yes	23	118 s
Budget constrained	MiniMax M2.5	`minimax/minimax-m2.5 via minimax`	2026-09-17 18:50	yes	8	15 s
Scale constrained	Claude Haiku 4.5	`claude-haiku-4-5-20251001`	2026-09-17 18:49	no	0	6 s
Scale constrained	GPT-5.4 mini	`gpt-5.4-mini-2026-03-17`	2026-09-17 20:48	no	0	7 s
Scale constrained	Gemini 3.5 Flash	`gemini-3.5-flash`	2026-09-17 21:55	yes	11	56 s
Scale constrained	Perplexity Sonar	`sonar`	2026-09-17 18:17	yes	20	8 s
Scale constrained	Grok 4.1 Fast	`spacexai/grok-4.1-fast-non-reasoning via vertex`	2026-09-17 18:10	yes	12	10 s
Scale constrained	Mistral Small	`mistral/mistral-small via mistral`	2026-09-17 18:30	no	0	6 s
Scale constrained	DeepSeek V4 Flash	`deepseek/deepseek-v4-flash via deepinfra`	2026-09-17 19:35	yes	19	79 s
Scale constrained	Llama 4 Maverick	`meta/llama-4-maverick via bedrock`	2026-09-17 21:00	yes	5	3 s
Scale constrained	Qwen 3.7 Flash	`alibaba/qwen3.7-flash via alibaba`	2026-09-17 19:58	yes	5	25 s
Scale constrained	Kimi K2	`moonshotai/kimi-k2 via novita`	2026-09-17 19:06	yes	9	74 s
Scale constrained	GLM 4.7 FlashX	`zai/glm-4.7-flashx via zai`	2026-09-17 20:57	yes	15	184 s
Scale constrained	MiniMax M2.5	`minimax/minimax-m2.5 via minimax`	2026-09-17 20:57	no	0	7 s
Negative framing	Claude Haiku 4.5	`claude-haiku-4-5-20251001`	2026-09-17 18:33	yes	17	12 s
Negative framing	GPT-5.4 mini	`gpt-5.4-mini-2026-03-17`	2026-09-17 18:14	yes	5	7 s
Negative framing	Gemini 3.5 Flash	`gemini-3.5-flash`	2026-09-17 19:09	yes	29	29 s
Negative framing	Perplexity Sonar	`sonar`	2026-09-17 19:50	yes	20	4 s
Negative framing	Grok 4.1 Fast	`spacexai/grok-4.1-fast-non-reasoning via vertex`	2026-09-17 19:37	yes	41	19 s
Negative framing	Mistral Small	`mistral/mistral-small via mistral`	2026-09-17 17:57	yes	5	5 s
Negative framing	DeepSeek V4 Flash	`deepseek/deepseek-v4-flash via fireworks`	2026-09-17 19:19	yes	28	31 s
Negative framing	Llama 4 Maverick	`meta/llama-4-maverick via bedrock`	2026-09-17 20:02	yes	5	5 s
Negative framing	Qwen 3.7 Flash	`alibaba/qwen3.7-flash via alibaba`	2026-09-17 18:04	yes	15	36 s
Negative framing	Kimi K2	`moonshotai/kimi-k2 via novita`	2026-09-17 18:51	yes	24	73 s
Negative framing	GLM 4.7 FlashX	`zai/glm-4.7-flashx via zai`	2026-09-17 18:28	yes	28	124 s
Negative framing	MiniMax M2.5	`minimax/minimax-m2.5 via minimax`	2026-09-17 20:16	yes	23	35 s

Normalization in this category

Every judgment call made between the raw labels and the numbers above, listed so it is visible and reversible.

Category-scoped readings

BILL AP & AR read as BILL

BILL AP/AR read as BILL

BILL.com read as BILL

Bill.com read as BILL

Corpay One read as Corpay

QuickBooks Bill Pay read as QuickBooks

QuickBooks Online read as QuickBooks

QuickBooks Online (with Advanced or Enterprise plans) read as QuickBooks

Ramp Bill Pay read as Ramp

Unresolved, counted raw

Apptivo / Odoo

Checkflo

Checkrun

Ken from Finance

Zoho Books + BillPay

Discontinued, still offered

No shut-down product was recommended here.

Accounts payable automation for small business buyers

By buyer segment

01The standing

Recommended versus criticized

02What they warned about

03What they cite

Sites the answers cite

Pages the answers cite

04How they answered

05The record

Normalization in this category

Also in spend and procurement