# Upflow vs Esker: which do AI models recommend for cash application, September 2026

Finance AI Recommendation Index, September 2026 Edition, Cash application. Two of twelve models named Upflow first on the direct prompt; three named Esker. Page: https://finance-ai-index.com/receivables/cash-application/upflow-vs-esker/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Upflow | 9% | #3 of 10 | 0% | 13 | 7 of 12 |
| Esker | 7% | #5 of 10 | 27% | 22 | 11 of 12 |

## The direct prompt, model by model

- Mistral Small: upflow first (first choices: Upflow) (alternatives: Bluecopa, Cashbook, Chaser)
- Llama 4 Maverick: upflow first (first choices: Upflow) (alternatives: Bluecopa, Cashbook, Chaser, Lunos)
- Grok 4.1 Fast: esker first (first choices: Esker) (alternatives: Billtrust, Gaviti, HighRadius, Quadient Accounts Receivable)
- DeepSeek V4 Flash: esker first (first choices: Esker, HighRadius) (alternatives: Gaviti, Monk, Versapay)
- GLM 4.7 FlashX: esker first (first choices: Esker, Kolleno) (alternatives: Chaser, Gaviti, Monk, Quadient Accounts Receivable, Serrala, Stuut, Transparency / Transformance, Versapay)
- Claude Haiku 4.5: neither first, one named (first choices: Versapay) (alternatives: Billtrust, Paystand, Quadient Accounts Receivable, Upflow)
- Gemini 3.5 Flash: neither first, one named (first choices: Quadient Accounts Receivable) (alternatives: Stuut, Tesorio, Upflow, Versapay)
- Perplexity Sonar: neither first, one named (first choices: HighRadius) (alternatives: Billtrust, Kolleno, Upflow)
- GPT-5.4 mini: neither named (first choices: HighRadius) (alternatives: BlackLine Cash Application, Sidetrade)
- Qwen 3.7 Flash: neither named (first choices: HighRadius) (alternatives: AtoBi, BlackLine Cash Application, Trintech)
- Kimi K2: neither named (first choices: HighRadius) (alternatives: Billtrust, Chaser, Versapay)
- MiniMax M2.5: neither named (first choices: HighRadius) (alternatives: Monk)

## What the models said about Upflow

- "Upflow - Good fit for mid-sized and scaling companies (typically $10M-$500M revenue) that need cash application to feed directly into AR and collections" (Llama 4 Maverick, direct prompt, first choice)
- "Upflow is often recommended as the best overall solution due to its seamless integration with collections and AR workflows" (Mistral Small, direct prompt, first choice)

## What the models said about Esker

- "Avoid the usual enterprise leaders like HighRadius, Billtrust, and Esker" (Perplexity Sonar, budget prompt, hard negative)
- "Enterprise-class, custom-priced, typically six figures annually." (DeepSeek V4 Flash, budget prompt, hard negative)
- "1. Esker (G2: 4.3–4.5/5; Gartner Leader in Invoice-to-Cash 2024) ... Enterprise-grade AI automation for cash matching" (Grok 4.1 Fast, direct prompt, first choice)
- "Esker or HighRadius are the safest bets if you want a proven, scalable platform" (DeepSeek V4 Flash, direct prompt, first choice)
- "Kolleno and Esker are strong, mid‑market‑focused all‑rounders." (GLM 4.7 FlashX, direct prompt, first choice)

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. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.