sampleweighting.com

What It Is

SampleWeighting.com is a professional data weighting tool operated by Persimmon Systems, LLC, designed for market research, academic surveys, and internal organizational research. Its core purpose is not ad targeting or SEO optimization, but helping researchers adjust survey samples with sampling bias through statistical weighting so the results more closely match the target population distribution.

Core Features and Data

The product is a cloud-based Web App that requires no installation and can be used on any computer with an internet connection. The tool automatically detects variables and precomputes unweighted distributions. After users set target distributions and parameters, it produces weighted results. Reports include diagnostic information such as variable matching, maximum/minimum weights, effective sample size, weighting efficiency, and design effect. Its API uses the same IPF engine as the Web tool, supporting JSON data, target distributions, and parameter submissions, and returns weighted data plus statistical summaries. This makes it suitable for overnight batch processing, survey platform integrations, and internal dashboards.

Pricing and Support

Pricing is based on credit packs rather than subscriptions: Small Business is $240/30 credits, Medium is $750/150 credits, and Large is $2400/1200 credits. Credits do not expire, and projects can be run and iterated without limits. The pricing page states that credits are only consumed when downloading/exporting final results. All plans support unlimited users, API Access, 200 iterations, and email support, while the Large plan includes Enterprise Support. Listed payment methods include Visa and Mastercard, with pricing in USD.

Pros and Cons

Its strengths are clear positioning, a low learning curve, support for unlimited team members with no per-seat fees, and a straightforward API design that can be added to a data pipeline via a single REST endpoint. Its resource library, tutorials, and guides are also friendly to researchers without a strong statistics background. The main drawbacks are that public materials do not specify whether a Chinese interface is available, whether it works reliably from China, data size limits, or security/compliance certifications. The terms also note that the service is not intended for use under specific industry regulatory requirements such as HIPAA or FISMA.

Who It’s For and Access from China

It is well suited to market research teams, academic researchers, consulting firms, and data teams with automated survey workflows that need to correct the representativeness of survey samples. If you are only doing SEO keyword research, ad campaigns, or content marketing, it is not a direct replacement for those tools. Access from China is not stated in the available text, so it should be considered unknown; payment may also be limited by the need for an international credit card. Domestic Chinese teams can evaluate local statistical software, self-built IPF workflows in R/Python, or built-in weighting features in survey platforms as alternatives, depending on their needs.