PASSNCSS
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Related Products
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About
ABTestly is an A/B testing platform for teams that ship experiments in code rather than through a visual editor.
You write each variation as real JavaScript and CSS. Experiments live in your repository and go through the same review as any other change. The runtime is about 31 KB gzipped, and the page is held until the variation is applied, so visitors do not see the control flash first.
Assignment, exposure and conversion are recorded as three separate events on an exact ledger rather than one inferred number, so results stay auditable. Confidence intervals are shown with the sample size, no winner is declared before significance, and sample ratio mismatch is detected and flagged.
Three statistics engines: frequentist on every plan, sequential and Bayesian from Pro upwards. Also a speed guardrail comparing p75 LCP against control.
Pricing is published: $99 a month at 50,000 tracked users, $249 at 200,000, $549 at 500,000, with a 14-day trial on monthly plans.
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About
PASS software provides sample size tools for over 1100 statistical test and confidence interval scenarios - more than double the capability of any other sample size software. Each tool has been carefully validated with published articles and/or texts. Get to know PASS by downloading a free trial, viewing the video to the right, or exploring this website. PASS has been fine-tuned for over 25 years and is now the leading sample size software choice for clinical trials, pharmaceuticals, and other medical research. It has also become a mainstay in all other fields where sample size calculation or evaluation is needed. In PASS, you can estimate the sample size for a statistical test or confidence interval in a few short steps. If you need guidance during any of the steps, PASS has excellent documentation, there are free training videos, and you can contact our team of Ph.D. statisticians.
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Not Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Software engineering and CRO teams at ecommerce and SaaS companies who write their own test variations in code, and agencies running experiments for client sites.
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Audience
Companies searching for a solution providing sample size tools for over 1100 statistical test and confidence interval scenarios
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Not Supported
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API
Offers API
Not Supported
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Screenshots and VideosNo images available
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Screenshots and Videos |
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Pricing
$99/month
Free Version
Not Supported
Free Trial
Supported
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Pricing
$395 per year
Free Version
Not Supported
Free Trial
Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Company InformationABTestly
Founded: 2025
abtestly.com
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Company InformationNCSS
Founded: 1983
United States
www.ncss.com/software/pass/
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AlternativesNo Alternatives
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Alternatives |
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Categories |
Categories |
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Statistical Analysis Features
Analytics
Supported
Association Discovery
Supported
Compliance Tracking
Supported
File Management
Not Supported
File Storage
Supported
Forecasting
Supported
Multivariate Analysis
Supported
Regression Analysis
Supported
Statistical Process Control
Supported
Statistical Simulation
Supported
Survival Analysis
Supported
Time Series
Supported
Visualization
Supported
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Integrations
No info available.
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Integrations
No info available.
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