# Greenhouse vs Koalendar: which do AI models recommend for interview scheduling, September 2026

HR AI Recommendation Index, September 2026 Edition, Interview scheduling. Three of twelve models named Greenhouse first on the direct prompt; zero named Koalendar. Page: https://hr-ai-index.com/talent/interview-scheduling/greenhouse-vs-koalendar/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Greenhouse | 13% | #3 of 11 | 7% | 28 | 12 of 12 |
| Koalendar | 11% | #4 of 11 | 0% | 13 | 10 of 12 |

## The direct prompt, model by model

- Claude Haiku 4.5: greenhouse first (first choices: Cronofy, Greenhouse) (alternatives: Calendly, Koalendar, ModernLoop)
- DeepSeek V4 Flash: greenhouse first (first choices: Greenhouse, ModernLoop) (alternatives: Ashby, Calendly, Lever)
- Qwen 3.7 Flash: greenhouse first (first choices: Greenhouse) (alternatives: Calendly, GoodTime, Lever, LimeLight, Lunacal)
- Grok 4.1 Fast: neither first, one named (first choices: GoodTime, Lever) (alternatives: Greenhouse, ModernLoop)
- Mistral Small: neither first, one named (first choices: Lever) (alternatives: Koalendar, ModernLoop)
- Llama 4 Maverick: neither first, one named (first choices: ModernLoop) (alternatives: Greenhouse, Lever)
- Kimi K2: neither first, one named (first choices: Lever) (alternatives: GoodTime, Greenhouse, ModernLoop)
- MiniMax M2.5: neither first, one named (first choices: Cal.com, Lever) (alternatives: GoodTime, Greenhouse, ModernLoop)
- GPT-5.4 mini: neither named (first choices: GoodTime) (alternatives: Ashby, Calendly)
- Gemini 3.5 Flash: neither named (first choices: ModernLoop) (alternatives: Ashby, candidate.fyi)
- Perplexity Sonar: neither named (first choices: ModernLoop) (alternatives: GoodTime, Lever)
- GLM 4.7 FlashX: neither named (first choices: ModernLoop) (alternatives: GoodTime, Lever, candidate.fyi)

## What the models said about Greenhouse

- "Expensive, longer setup (4-8 wks), quote-only ... they're overkill (and 2-5x costlier) for most mid-sized B2B ops" (Grok 4.1 Fast, paraphrase prompt, soft negative)
- "Greenhouse is a strong fit for mid-size to enterprise companies with dedicated recruiting teams managing high volumes of interviews" (Claude Haiku 4.5, direct prompt, first choice)

## What the models said about Koalendar

- "The best interview scheduling software for a company with a limited budget is Koalendar, which offers a genuinely free-forever plan and is simple to use." (Llama 4 Maverick, budget prompt, first choice)
- "the best interview scheduling software is usually Calendly or Koalendar if you want a dedicated scheduler" (Perplexity Sonar, budget prompt, first choice)
- "I would recommend starting with Koalendar or Calendly since they offer the most robust free plans" (MiniMax M2.5, budget 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.