Interview scheduling · November 2026 Edition
Koalendar vs Prelude
Zero of fourteen models named Koalendar first on the direct prompt; zero named Prelude. Koalendar was named by eleven of the fourteen models and Prelude by nine and Koalendar carries 19 labels and Prelude 14, so the shares are not directly comparable.
Named in one category this edition.
Prelude
criticized challengerNamed in one category this edition.
First-choice share10%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate11%29%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#4#8A position in a field of 15; printed, not drawn.
Labels1914A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Koalendar reading right to left. Rank and label count are printed, not drawn.ModernLoop was named alongside these two in thirteen of the fourteen direct answers. ModernLoop vs Koalendar · ModernLoop vs Prelude · Calendly vs Koalendar
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; every quote names the model and the prompt it came from. Both figures come from the interview scheduling page.
By framing
How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
KoalendarFirst choices, of fourteen modelsPreludeDirect001 against Prelude
Paraphrase001 against Prelude
Comparative001 against Prelude
Budget-constrained50
Scale-constrained01
Negative002 against Koalendar · 1 against Prelude
Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Koalendar and Prelude stood in it.
| Model | DirectPR | ParaphrasePR | ComparativePR | Budget-constrainedPR | Scale-constrainedPR | NegativePR |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | PR | | ||||
| GPT-5.4 mini | PR | |||||
| Gemini 3.5 Flash | PR | | PR | |||
| Perplexity Sonar | | | ||||
| Grok 4.20 | PR | | | |||
| Mistral Small | | | ||||
| DeepSeek V4 Flash | PR | | ||||
| Llama 4 Maverick | ||||||
| Qwen 3.7 Flash | | | ||||
| Kimi K2 | PR | | ||||
| GLM 4.7 FlashX | PR | | ||||
| MiniMax M2.5 | | | ||||
| GPT-6 Luna | PR | |||||
| Muse Glimmer 30B | PR | | PR |
KoalendarPR Prelude first choice named as an alternative argued againstblank: not namedEach cell is one answer, Koalendar on the left and Prelude on the right.The direct prompt
The plain question, one answer per model, grouped by where Koalendar and Prelude stood in it.
Neither was the first choice, one was named
3 of 14 modelsThe answer put something else first and named one of the two as an alternative.Claude Haiku 4.5ModernLoop alternatives: Ashby, GoodTime, Prelude
Grok 4.20ModernLoop alternatives: Grayscale, Prelude
Muse Glimmer 30BModernLoop alternatives: Grayscale, Prelude
Neither was named
11 of 14 modelsThe answer made no first choice from these two in this category.GPT-5.4 miniGoodTime alternatives: Ashby, Calendly, Greenhouse, Lever
Gemini 3.5 FlashModernLoop alternatives: Ashby, GoodTime, candidate.fyi
Perplexity SonarGoodTime alternatives: Ashby, Cal.com, Lever, ModernLoop
Mistral SmallGoodTime alternatives: Calendly, ModernLoop, Paradox
DeepSeek V4 FlashModernLoop alternatives: Calendly
Llama 4 MaverickModernLoop alternatives: Calendly, GoodTime
Qwen 3.7 FlashCalendly, ModernLoop alternatives: GoodTime, Greenhouse, Lever
Kimi K2ModernLoop alternatives: GoodTime
GLM 4.7 FlashXModernLoop alternatives: GoodTime, Grayscale
MiniMax M2.5ModernLoop alternatives: Cal.com, GoodTime, VidCruiter
GPT-6 LunaModernLoop alternatives: Ashby's native scheduling, GoodTime
Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
Koalendar leads by fifteen points.
Koalendar15%#2 of 16Prelude0%#– of 16
The full small business standing →Mid-marketThe figures above
Enterprise
The order flips: Prelude leads at enterprise.
Prelude2%#– of 13
Koalendar0%#– of 13What the models said about Koalendar
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Five of six in this category shown.
“Lack enterprise features like audit trails, SSO, or robust integrations—avoid for scaled hiring due to reliability gaps.” Grok 4.20 · negative prompt · hard negative
“General-purpose schedulers such as Calendly, Cal.com, Koalendar, or YouCanBookMe: ... verify panel coordination” Perplexity Sonar · negative prompt · soft negative
“Koalendar is widely considered the best option for strict budget constraints because it offers a completely free plan with no time limits.” GLM 4.7 FlashX · budget prompt · first choice
“Often cited as the best genuinely free scheduler... Zero Budget: Use Koalendar” Qwen 3.7 Flash · budget prompt · first choice
“For most companies with a limited budget, I'd start with Koalendar.” DeepSeek V4 Flash · budget prompt · first choice
What the models said about Prelude
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Legacy Tools (e.g., Prelude): ... Calendly has wound down this dedicated TA scheduling product.” Gemini 3.5 Flash · direct prompt · hard negative
“Prelude is being wound down by Calendly and should likely be avoided for new implementations” DeepSeek V4 Flash · comparative prompt · hard negative
“it's being wound down and shouldn't be on your shortlist” Kimi K2 · paraphrase prompt · hard negative
“The top tools for mid-market recruiting teams are typically ModernLoop, Prelude, or Grayscale” Muse Glimmer 30B · scale prompt · first choice
“look at recruiting-native schedulers like ModernLoop, Prelude, Grayscale, or candidate.fyi” GLM 4.7 FlashX · paraphrase prompt · alternative
“Prelude (Interview Schedule) (Runner-Up for Candidate Experience and Simplicity)” Grok 4.20 · direct prompt · alternative
Also compared
ModernLoop vs KoalendarModernLoop vs PreludeCalendly vs KoalendarCalendly vs PreludeGoodTime vs KoalendarGoodTime vs PreludeKoalendar vs Cal.comKoalendar vs LeverKoalendar vs GreenhouseCal.com vs PreludeLever vs PreludeGreenhouse vs PreludeAll twenty-eight head-to-head pages and the full interview scheduling standing
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.