# Calendly vs Koalendar: which do AI models recommend for interview scheduling, October 2026

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

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Calendly | 20% | #1 of 12 | 33% | 55 | 14 of 14 |
| Koalendar | 6% | #7 of 12 | 0% | 10 | 7 of 14 |

## The direct prompt, model by model

- Grok 4.1 Fast: calendly first (first choices: Calendly) (alternatives: Chili Piper, Greenhouse, Lever)
- DeepSeek V4 Flash: calendly first (first choices: Cal.com, Calendly) (alternatives: Greenhouse, Lever)
- GLM 4.7 FlashX: calendly first (first choices: Calendly) (alternatives: GoodTime, Greenhouse, Lever)
- Kimi K2: neither first, one named (first choices: ModernLoop) (alternatives: Ashby, Calendly, GoodTime, Greenhouse, Lever)
- Claude Haiku 4.5: neither named (first choices: ModernLoop) (alternatives: Ashby, GoodTime, Greenhouse)
- GPT-5.4 mini: neither named (first choices: Ashby) (alternatives: Calendly Sales, GoodTime, Prelude)
- Gemini 3.5 Flash: neither named (first choices: ModernLoop) (alternatives: Ashby, Calendly’s Prelude, GoodTime)
- Perplexity Sonar: neither named (first choices: GoodTime) (alternatives: Calendly Sales, Greenhouse, ModernLoop)
- Mistral Small: neither named (first choices: Greenhouse, Lever) (alternatives: Cal.com)
- Llama 4 Maverick: neither named (first choices: Lever) (alternatives: Cal.com, Greenhouse, Joveo, Workforce Now)
- Qwen 3.7 Flash: neither named (first choices: GoodTime) (alternatives: Ashby, Lever)
- MiniMax M2.5: neither named (first choices: Lever) (alternatives: Cal.com, Chili Piper, Greenhouse)
- GPT-6 Luna: neither named (first choices: ModernLoop) (alternatives: GoodTime, Greenhouse)
- Muse Glimmer 30B: neither named (first choices: Greenhouse, Jobvite) (alternatives: GoodTime, candidate.fyi)

## What the models said about Calendly

- "Avoid using general-purpose tools (like Doodle or basic free tiers of Calendly) for serious hiring workflows" (DeepSeek V4 Flash, negative prompt, hard negative)
- "Calendly (Specifically for large Enterprise/Tech sectors): ... it is notably banned by Amazon for employee use. This is due to concerns over data leakage" (Qwen 3.7 Flash, negative prompt, soft negative)
- "Calendly - Very popular and widely used. Has a free tier for basic use... For very small teams (1-5 people): Calendly's free plan or BizBot's free tier should suffice" (MiniMax M2.5, budget prompt, first choice)
- "Most companies with limited budgets start with Calendly's free plan and upgrade only when they need team scheduling features" (Kimi K2, budget prompt, first choice)
- "1. Calendly
- Best for: Sales teams, recruiters, consultants, and anyone needing to schedule 1:1 or team meetings." (Mistral Small, comparative prompt, first choice)

## What the models said about Koalendar

- "It's the top pick for simple automated interview scheduling, especially for small and mid-sized recruiting teams" (Claude Haiku 4.5, budget prompt, first choice)
- "Start with Koalendar or Calendly's free plan to get basic functionality without cost." (GLM 4.7 FlashX, budget prompt, first choice)
- "Cal.com free tier or Koalendar free forever give the most features without cost" (Muse Glimmer 30B, budget prompt, first choice)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen 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.