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KeySurvey - KeySurvey provides survey and questionnaire tools.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Zonka Feedback - Top feedback app designed to collect customer feedback on iPad & Android tablets, Online Surveys on Website, Mobile, Email & SMS. Track NPS & Other Metrics.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
SurveyNuts - Easy & beautiful survey maker.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.