# Cal.com vs OnceHub: which do AI models recommend for scheduling, October 2026

GTM AI Recommendation Index, October 2026 Edition, Meeting scheduling. Zero of fourteen models named Cal.com first on the direct prompt; zero named OnceHub. Page: https://gtm-ai-index.com/sales/meeting-scheduling/cal-com-vs-oncehub/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Cal.com | 3% | #4 of 12 | 0% | 29 | 11 of 14 |
| OnceHub | 2% | #6 of 12 | 0% | 10 | 7 of 14 |

## The direct prompt, model by model

- Claude Haiku 4.5: neither first, one named (first choices: Chili Piper) (alternatives: Cal.com, Calendly, HubSpot Meetings, RevenueHero)
- Perplexity Sonar: neither first, one named (first choices: Calendly, Chili Piper) (alternatives: Cal.com, HubSpot Meetings, HubSpot Sales Hub)
- DeepSeek V4 Flash: neither first, one named (first choices: Calendly) (alternatives: HubSpot Meetings, OnceHub)
- GPT-5.4 mini: neither named (first choices: Chili Piper, HubSpot Meetings) (alternatives: Calendly)
- Gemini 3.5 Flash: neither named (first choices: RevenueHero) (alternatives: Calendly, Default, LeanData BookIt)
- Grok 4.1 Fast: neither named (first choices: Chili Piper) (alternatives: Calendly, Default, HubSpot Meetings, RevenueHero, SavvyCal)
- Mistral Small: neither named (first choices: Chili Piper) (alternatives: HubSpot Meetings, SavvyCal)
- Llama 4 Maverick: neither named (first choices: HubSpot Sales Hub)
- Qwen 3.7 Flash: neither named (first choices: Chili Piper) (alternatives: Calendly)
- Kimi K2: neither named (first choices: RevenueHero) (alternatives: Calendly, HubSpot Meetings)
- GLM 4.7 FlashX: neither named (first choices: Chili Piper) (alternatives: Calendly, HubSpot Meetings)
- MiniMax M2.5: neither named (first choices: Chili Piper, HubSpot Sales Hub) (alternatives: Calendly, Salesforce Sales Cloud)
- GPT-6 Luna: neither named (first choices: Calendly) (alternatives: Chili Piper, HubSpot Meetings, RevenueHero)
- Muse Glimmer 30B: neither named (first choices: Chili Piper, ChiliCal) (alternatives: Calendly, HubSpot Meetings)

## What the models said about Cal.com

- "Start with Cal.com if you need: Team features and routing on a budget" (Kimi K2, budget prompt, first choice)
- "Prioritize open-source like Cal.com for full control/privacy." (Grok 4.1 Fast, negative prompt, first choice)
- "Cal.com — best overall flexible / open source alternative" (Muse Glimmer 30B, comparative prompt, first choice)

## What the models said about OnceHub

- "I'd prioritize OnceHub if you need advanced lead routing and qualification features" (Claude Haiku 4.5, paraphrase prompt, first choice)
- "If your scheduling needs are especially complex (multi-department routing, high booking volumes), I'd lean toward OnceHub" (DeepSeek V4 Flash, paraphrase prompt, alternative)
- "Advanced routing and qualification flows; good for complex scheduling scenarios" (Kimi K2, comparative prompt, alternative)

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.