Website and synthetic monitoring · October 2026 Edition
Uptime.com vs Checkly
Three of fourteen models named Uptime.com first on the direct prompt; zero named Checkly. Uptime.com was named by thirteen of the fourteen models and Checkly by ten and Uptime.com carries 25 labels and Checkly 19, so the shares are not directly comparable.
Named in one category this edition.
Named in two categories this edition.
First-choice share7%6%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate16%0%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#4#6A position in a field of 12; printed, not drawn.
Labels2519A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Uptime.com reading right to left. Rank and label count are printed, not drawn.Better Stack was named alongside these two in eleven of the fourteen direct answers. UptimeRobot vs Uptime.com · UptimeRobot vs Checkly · Better Stack vs Uptime.com
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 website and synthetic monitoring page.
By framing
How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
Uptime.comFirst choices, of fourteen modelsCheckly
Direct30
Paraphrase03
Comparative00
Budget-constrained00
Scale-constrained10
Negative014 against Uptime.com
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 Uptime.com and Checkly stood in it.
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | | ||||
| GPT-5.4 mini | | |||||
| Gemini 3.5 Flash | | | | |||
| Perplexity Sonar | | | | |||
| Grok 4.1 Fast | | |||||
| Mistral Small | ||||||
| DeepSeek V4 Flash | | | | | ||
| Llama 4 Maverick | ||||||
| Qwen 3.7 Flash | | | | | | |
| Kimi K2 | | | | |||
| GLM 4.7 FlashX | | | | |||
| MiniMax M2.5 | ||||||
| GPT-6 Luna | | | | |||
| Muse Glimmer 30B | | |
Uptime.com Checkly first choice named as an alternative argued againstblank: not namedEach cell is one answer, Uptime.com on the left and Checkly on the right.The direct prompt
The plain question, one answer per model, grouped by where Uptime.com and Checkly stood in it.
Uptime.com first, Checkly not the choice
3 of 14 modelsCheckly was named in the answer but not as the choice, or not at all.GPT-5.4 miniUptime.com alternatives: Better Stack, Pingdom
Perplexity SonarUptime.com alternatives: Datadog Synthetic Monitoring, Hyperping, Site24x7
GLM 4.7 FlashXUptime.com alternatives: Better Stack, Hyperping
Neither was the first choice, one was named
4 of 14 modelsThe answer put something else first and named one of the two as an alternative.Gemini 3.5 FlashBetter Stack alternatives: Checkly, Uptime.com
DeepSeek V4 FlashBetter Stack alternatives: Pingdom, Uptime.com
Qwen 3.7 FlashBetter Stack alternatives: Atlassian Statuspage, Checkly, Site24x7
GPT-6 LunaBetter Stack alternatives: Datadog Synthetic Monitoring, Uptime.com
Neither was named
7 of 14 modelsThe answer made no first choice from these two in this category.Claude Haiku 4.5Better Stack alternatives: Site24x7, StatusCake, UptimeRobot
Grok 4.1 FastPingdom alternatives: Site24x7, StatusCake, UptimeRobot
Mistral SmallBetter Stack, Hyperping alternatives: Oh Dear, StatusCake
Llama 4 MaverickManageEngine's OpManager alternatives: UptimeRobot
Kimi K2Better Stack alternatives: Pingdom, Site24x7, UptimeRobot
MiniMax M2.5Better Stack, Pingdom alternatives: Datadog Synthetic Monitoring, Site24x7
Muse Glimmer 30BBetter Stack alternatives: Pingdom, StatusCake, UptimeRobot
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
Checkly leads by five points.
Checkly5%#5 of 11Uptime.com0%#– of 11Mid-marketThe figures above
The order flips: Uptime.com leads at mid-market.
Uptime.com7%#4 of 12Checkly6%#6 of 12Enterprise
Uptime.com leads by eighteen points.
Uptime.com18%#3 of 12Checkly0%#– of 12What the models said about Uptime.com
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“The billing practices are the biggest concern here — monitor your invoices carefully if you use them.” DeepSeek V4 Flash · negative prompt · hard negative
“Some users have reported occasional false alerts... and the service is relatively expensive compared to similar offerings” Claude Haiku 4.5 · negative prompt · soft negative
“Surprise billing/subscription creep ... eroding value; monitor invoices closely.” Grok 4.1 Fast · negative prompt · soft negative
“Shortlist to evaluate: Uptime.com, Better Stack, or UptimeRobot Enterprise” Kimi K2 · scale prompt · first choice
“My Top Pick: Uptime.com. It is the standard for mid-market B2B” GLM 4.7 FlashX · direct prompt · first choice
“the strongest all-around choice is usually Uptime.com” Perplexity Sonar · direct prompt · first choice
What the models said about Checkly
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.
“Reputable alternatives frequently recommended include Better Stack, Checkly, Site24x7” Kimi K2 · negative prompt · first choice
“Synthetic monitoring: Start with Checkly (code‑first, predictable pricing)” GLM 4.7 FlashX · paraphrase prompt · first choice
“The Developer-First Choice: Checkly ... Checkly is highly recommended.” Gemini 3.5 Flash · paraphrase prompt · first choice
Also compared
UptimeRobot vs Uptime.comUptimeRobot vs ChecklyBetter Stack vs Uptime.comBetter Stack vs ChecklyPingdom vs Uptime.comPingdom vs ChecklyUptime.com vs Datadog Synthetic MonitoringUptime.com vs HyperpingUptime.com vs Site24x7Datadog Synthetic Monitoring vs ChecklyCheckly vs HyperpingCheckly vs Site24x7All twenty-eight head-to-head pages and the full uptime monitoring 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.