Such a multifaceted concept as "customer loyalty" is not easy to describe, but not at all difficult to measure. The NPS index comes to the rescue. The simplicity of the survey for customers + comprehensible method of calculation + the possibility of monitoring made NPS a popular method for determining customer loyalty both among small firms and among world-renowned companies. Today, most customer surveys are conducted online; the NPS survey is no exception. I propose to consider online services for the survey of NPS on the following criteria:
- cost of the survey
- design options
- distribution of the survey
- processing of results
- notifications of received responses
- survey template
- finding company server
A survey of NPS can be conducted on the paid version: 1 390 rubles for 1 survey without restriction on the number of questions and answers or 12,500 for an unlimited number of surveys during the year.
I am pleased with the design settings: two cute NPS scales to choose from (color or black and white), adding a logo, background settings (image, color), buttons, fonts.

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To distribute the survey it is proposed to use a direct link, additional links, embedding on the site, a pop-up window or a widget. E-mail newsletter from the site is only in development. If you want to send a survey, you will have to do it yourself.
In the results, in addition to the index itself, there is a detailed breakdown of respondents into categories and a schedule of changes in NPS.

Alerts about the received responses can be configured with different frequencies, they will contain information on the number of answers, the current NPS for the selected period and for the entire period of the survey. In addition to your e-mail, you can add additional addresses for alerts.
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Template NPS polling color.→
The NPS survey template is black and white.The company's server is located in the Russian Federation.
Creating an NPS survey is available at a paid, maximum rate ($ 59 / month for a one-time purchase or $ 99 / month for an annual rate). Design customization options include adding a logo and changing the background (color themes and pre-made backgrounds). The NPS scale is represented by a standard scale.

Distribution of the survey is possible through a direct link, embedding on the site, pop-up windows and e-mail newsletters from the service.
The survey results contain a detailed breakdown of respondents by category and the NPS index itself. No index change graphics.

E-mail alerts for each new response are available. Alerts do not contain information about the response itself, nor is it possible to specify additional e-mails for alerts.
No survey template.
Survio Server is located in the Czech Republic.
The NPS survey can be created for free, but at a free rate after passing the survey, the respondent will see the service advertisement. In addition, the free tariff limits the number of responses received - a maximum of 100. At the basic tariff (1,790 rubles / month), the number of responses is expanded to 1,000).
The NPS scale looks neutral and is represented by a standard scale. Design settings allow you to change the background (color, background and custom themes), add a logo and customize fonts.

To distribute the survey is offered by direct and additional links, by embedding in the site, pop-up poll or invitation to the survey, there is also a newsletter from the site.
The results contain only a general breakdown of respondents by category and a calculated index.

In the paid version there is an analysis of trends in the industry. E-mail alerts inform you about the number of responses received, do not have frequency settings and the ability to add e-mails.
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NPS Poll Template.The server is in the USA.
Each of these services allows you to conduct a qualitative study, offering a wide range of options for customizing the design and distribution of the survey, differing only in nuances. An important factor when choosing a service is the depth of processing the results, because competent analytics will significantly save your time.