Prayvine is a free, secure prayer-request platform for mission workers and the people who support them.^1 Missionaries Ian and Kim Hsu, now in Orlando, built private prayer circles so field updates are less likely to vanish in a crowded inbox.^2 Ian previously led digital engagement strategy at Stanford University; Kim served on staff with CityTeam Ministries in San Jose.^2 Messages stay encrypted in the app or a supporter's inbox, hidden from search engines, with no public directory and no ads.^2 Prayvine is a 501(c)(3) public charity, donor-funded so the tools stay free.^2 Their about page cites a survey in which 67% of missionaries reported moderate-to-significant depression from isolation on the field.^2 Peninsula Bible Church writes that more than 1,000 missionaries and 100,000 prayer partners use the platform.^5 The homepage features workers with Cru, InterVarsity, Food for the Hungry, and Servant Partners.^1 The team has been building since 2014; more than 100 mission organizations have used it to mobilize prayer.^4 A Learning Center coaches short, timely requests and documents owner-controlled teams plus search-engine hiding.^6 OSCAR lists the ministry among UK prayer resources, and SEND International's SEND U blog has recommended it for connecting with ministry partners.^7