{"id":59073,"date":"2025-04-07T00:19:00","date_gmt":"2025-04-06T22:19:00","guid":{"rendered":"https:\/\/aboutsignal.com\/?p=59073"},"modified":"2026-05-10T14:34:02","modified_gmt":"2026-05-10T12:34:02","slug":"what-is-signal-app","status":"publish","type":"post","link":"https:\/\/aboutsignal.com\/de\/blog\/what-is-signal-app\/","title":{"rendered":"Was ist Signal?"},"content":{"rendered":"<p><strong>Signal Messenger is an end-to-end encrypted messaging service focused on privacy and security. The app is available free of charge for Android, iOS (iPhone, iPad, iPod Touch), and Desktop (Windows, Mac, Linux).<\/strong><\/p>\n\n\n\n<p>With Signal, users can send text messages, photos, videos, audio recordings, stickers, GIFs, documents, and other files securely. The app also supports free voice calls, video calls, group chats, stories, disappearing messages, and encrypted group conversations.<\/p>\n\n\n\n<p>To use Signal, a mobile internet connection or Wi-Fi is required. Aside from regular internet or mobile data charges, sending messages and making calls through <a href=\"https:\/\/aboutsignal.com\/de\/blog\/ist-das-signal-kostenlos-die-kosten-fa%c2%bcr-die-nutzung-des-signals\/\" type=\"link\" id=\"https:\/\/aboutsignal.com\/blog\/is-signal-free-the-costs-of-using-signal\/\">Signal is completely free<\/a>.<\/p>\n\n\n\n<p>Unlike many other popular messaging apps, <a href=\"https:\/\/aboutsignal.com\/de\/signal-app-vergleich\/\" type=\"page\" id=\"50873\">Signal puts user privacy first<\/a>. The app contains no advertisements, does not track users, and collects minimal user data. In addition, Signal\u2019s code is open source, allowing security experts to independently review how the app works.<\/p>\n\n\n\n<p>Signal is developed by the independent non-profit Signal Foundation. The development of the app is <a href=\"https:\/\/aboutsignal.com\/de\/blog\/wie-verdient-signal-geld-das-umsatzmodell-von-signal\/\" type=\"link\" id=\"https:\/\/aboutsignal.com\/blog\/how-does-signal-make-money-the-revenue-model-of-signal\/\">funded through donations<\/a> and grants rather than advertising or user data collection.<\/p>\n\n\n\n<p>Du hast Signal noch nicht? <a href=\"https:\/\/signal.org\/install\" type=\"link\" id=\"https:\/\/signal.org\/install\">Give it a try<\/a>! If you want to learn more first, read our post <a href=\"https:\/\/aboutsignal.com\/de\/blog\/warum-signal-verwenden-die-vorteile-von-signal-messenger-fa%c2%bcr-sie\/\" type=\"link\" id=\"https:\/\/aboutsignal.com\/blog\/why-use-signal-the-benefits-of-signal-messenger-for-you\/\">Warum Signal nutzen? Die Vorteile von Signal f\u00fcr dich<\/a>.<br><\/p>","protected":false},"excerpt":{"rendered":"<p>What is Signal Messenger? Signal is an encrypted messaging app focused on privacy and security.<\/p>","protected":false},"author":1,"featured_media":54744,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"off","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[24],"tags":[],"class_list":["post-59073","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Signal? Private and secure messaging app<\/title>\n<meta name=\"description\" content=\"What is Signal Messenger? Signal is an encrypted messaging app focused on privacy and security.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aboutsignal.com\/de\/blog\/what-is-signal-app\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Signal? Private and secure messaging app\" \/>\n<meta property=\"og:description\" content=\"What is Signal Messenger? Signal is an encrypted messaging app focused on privacy and security.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aboutsignal.com\/de\/blog\/what-is-signal-app\/\" \/>\n<meta property=\"og:site_name\" content=\"AboutSignal\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-06T22:19:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-10T12:34:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/aboutsignal.com\/files\/featured-aboutsignal-signal-messenger-user-guide.png\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"337\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"AboutSignal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"AboutSignal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"2\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/\"},\"author\":{\"name\":\"AboutSignal\",\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/#\\\/schema\\\/person\\\/b613319e5109cdac14b98dff0f397ec5\"},\"headline\":\"What is Signal?\",\"datePublished\":\"2025-04-06T22:19:00+00:00\",\"dateModified\":\"2026-05-10T12:34:02+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/\"},\"wordCount\":198,\"publisher\":{\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/aboutsignal.com\\\/files\\\/featured-aboutsignal-signal-messenger-user-guide.png\",\"articleSection\":[\"Blog\"],\"inLanguage\":\"de\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/\",\"url\":\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/\",\"name\":\"What is Signal? Private and secure messaging app\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/aboutsignal.com\\\/files\\\/featured-aboutsignal-signal-messenger-user-guide.png\",\"datePublished\":\"2025-04-06T22:19:00+00:00\",\"dateModified\":\"2026-05-10T12:34:02+00:00\",\"description\":\"What is Signal Messenger? Signal is an encrypted messaging app focused on privacy and security.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/#primaryimage\",\"url\":\"https:\\\/\\\/aboutsignal.com\\\/files\\\/featured-aboutsignal-signal-messenger-user-guide.png\",\"contentUrl\":\"https:\\\/\\\/aboutsignal.com\\\/files\\\/featured-aboutsignal-signal-messenger-user-guide.png\",\"width\":600,\"height\":337},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/blog\\\/what-is-signal-app\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/aboutsignal.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"What is Signal?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/#website\",\"url\":\"https:\\\/\\\/aboutsignal.com\\\/\",\"name\":\"AboutSignal\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/aboutsignal.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"de\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/#organization\",\"name\":\"AboutSignal\",\"url\":\"https:\\\/\\\/aboutsignal.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/aboutsignal.com\\\/files\\\/logo-aboutsignal.png\",\"contentUrl\":\"https:\\\/\\\/aboutsignal.com\\\/files\\\/logo-aboutsignal.png\",\"width\":1024,\"height\":1024,\"caption\":\"AboutSignal\"},\"image\":{\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/aboutsignal.com\\\/#\\\/schema\\\/person\\\/b613319e5109cdac14b98dff0f397ec5\",\"name\":\"AboutSignal\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/2e01a5b580fc52d559d93d480226eb2165744725974ffb8b583f2e57cdbe6be2?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/2e01a5b580fc52d559d93d480226eb2165744725974ffb8b583f2e57cdbe6be2?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/2e01a5b580fc52d559d93d480226eb2165744725974ffb8b583f2e57cdbe6be2?s=96&d=mm&r=g\",\"caption\":\"AboutSignal\"},\"sameAs\":[\"https:\\\/\\\/aboutsignal.com\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What is Signal? Private and secure messaging app","description":"What is Signal Messenger? Signal is an encrypted messaging app focused on privacy and security.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/aboutsignal.com\/de\/blog\/what-is-signal-app\/","og_locale":"de_DE","og_type":"article","og_title":"What is Signal? Private and secure messaging app","og_description":"What is Signal Messenger? Signal is an encrypted messaging app focused on privacy and security.","og_url":"https:\/\/aboutsignal.com\/de\/blog\/what-is-signal-app\/","og_site_name":"AboutSignal","article_published_time":"2025-04-06T22:19:00+00:00","article_modified_time":"2026-05-10T12:34:02+00:00","og_image":[{"width":600,"height":337,"url":"https:\/\/aboutsignal.com\/files\/featured-aboutsignal-signal-messenger-user-guide.png","type":"image\/png"}],"author":"AboutSignal","twitter_card":"summary_large_image","twitter_misc":{"Verfasst von":"AboutSignal","Gesch\u00e4tzte Lesezeit":"2\u00a0Minuten"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/#article","isPartOf":{"@id":"https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/"},"author":{"name":"AboutSignal","@id":"https:\/\/aboutsignal.com\/#\/schema\/person\/b613319e5109cdac14b98dff0f397ec5"},"headline":"What is Signal?","datePublished":"2025-04-06T22:19:00+00:00","dateModified":"2026-05-10T12:34:02+00:00","mainEntityOfPage":{"@id":"https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/"},"wordCount":198,"publisher":{"@id":"https:\/\/aboutsignal.com\/#organization"},"image":{"@id":"https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/#primaryimage"},"thumbnailUrl":"https:\/\/aboutsignal.com\/files\/featured-aboutsignal-signal-messenger-user-guide.png","articleSection":["Blog"],"inLanguage":"de"},{"@type":"WebPage","@id":"https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/","url":"https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/","name":"What is Signal? Private and secure messaging app","isPartOf":{"@id":"https:\/\/aboutsignal.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/#primaryimage"},"image":{"@id":"https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/#primaryimage"},"thumbnailUrl":"https:\/\/aboutsignal.com\/files\/featured-aboutsignal-signal-messenger-user-guide.png","datePublished":"2025-04-06T22:19:00+00:00","dateModified":"2026-05-10T12:34:02+00:00","description":"What is Signal Messenger? Signal is an encrypted messaging app focused on privacy and security.","breadcrumb":{"@id":"https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/#breadcrumb"},"inLanguage":"de","potentialAction":[{"@type":"ReadAction","target":["https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/"]}]},{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/#primaryimage","url":"https:\/\/aboutsignal.com\/files\/featured-aboutsignal-signal-messenger-user-guide.png","contentUrl":"https:\/\/aboutsignal.com\/files\/featured-aboutsignal-signal-messenger-user-guide.png","width":600,"height":337},{"@type":"BreadcrumbList","@id":"https:\/\/aboutsignal.com\/blog\/what-is-signal-app\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/aboutsignal.com\/"},{"@type":"ListItem","position":2,"name":"What is Signal?"}]},{"@type":"WebSite","@id":"https:\/\/aboutsignal.com\/#website","url":"https:\/\/aboutsignal.com\/","name":"AboutSignal","description":"","publisher":{"@id":"https:\/\/aboutsignal.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/aboutsignal.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"de"},{"@type":"Organization","@id":"https:\/\/aboutsignal.com\/#organization","name":"AboutSignal","url":"https:\/\/aboutsignal.com\/","logo":{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/aboutsignal.com\/#\/schema\/logo\/image\/","url":"https:\/\/aboutsignal.com\/files\/logo-aboutsignal.png","contentUrl":"https:\/\/aboutsignal.com\/files\/logo-aboutsignal.png","width":1024,"height":1024,"caption":"AboutSignal"},"image":{"@id":"https:\/\/aboutsignal.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/aboutsignal.com\/#\/schema\/person\/b613319e5109cdac14b98dff0f397ec5","name":"AboutSignal","image":{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/secure.gravatar.com\/avatar\/2e01a5b580fc52d559d93d480226eb2165744725974ffb8b583f2e57cdbe6be2?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/2e01a5b580fc52d559d93d480226eb2165744725974ffb8b583f2e57cdbe6be2?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/2e01a5b580fc52d559d93d480226eb2165744725974ffb8b583f2e57cdbe6be2?s=96&d=mm&r=g","caption":"AboutSignal"},"sameAs":["https:\/\/aboutsignal.com"]}]}},"_links":{"self":[{"href":"https:\/\/aboutsignal.com\/de\/wp-json\/wp\/v2\/posts\/59073","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aboutsignal.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aboutsignal.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aboutsignal.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aboutsignal.com\/de\/wp-json\/wp\/v2\/comments?post=59073"}],"version-history":[{"count":6,"href":"https:\/\/aboutsignal.com\/de\/wp-json\/wp\/v2\/posts\/59073\/revisions"}],"predecessor-version":[{"id":59082,"href":"https:\/\/aboutsignal.com\/de\/wp-json\/wp\/v2\/posts\/59073\/revisions\/59082"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aboutsignal.com\/de\/wp-json\/wp\/v2\/media\/54744"}],"wp:attachment":[{"href":"https:\/\/aboutsignal.com\/de\/wp-json\/wp\/v2\/media?parent=59073"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aboutsignal.com\/de\/wp-json\/wp\/v2\/categories?post=59073"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aboutsignal.com\/de\/wp-json\/wp\/v2\/tags?post=59073"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}