https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's tech blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, distributed training, and data engineering. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Sat, 16 May 2026 00:00:00 GMT https://www.youngju.dev/blog/culture/2026-05-16-privacy-email-providers-2026-proton-tuta-mailbox-fastmail-posteo-skiff-rip-deep-dive.en https://www.youngju.dev/blog/culture/2026-05-16-privacy-email-providers-2026-proton-tuta-mailbox-fastmail-posteo-skiff-rip-deep-dive.en Mapping the privacy email landscape in 2026. ProtonMail (Switzerland, the biggest E2EE), Tuta (Germany, formerly Tutanota — post-quantum pioneer), Mailbox.org (Germany, business-friendly), Fastmail (Australia, not E2EE but strong privacy), Posteo (€1/month German open source), Mailfence, StartMail, Hey (37signals), Skiff (Notion acquired Feb 2024 → RIP), paid alternatives like Migadu / Runbox / MXroute, and self-hosting options like Stalwart, Mail-in-a-box, Maddy, Postal. Plus Korean (Daum / Naver / Kakao) and Japanese (Yahoo!Mail / Gmail JP / So-net / OCN / ConoHa) markets. Who should pick what. Sat, 16 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) emailprivacyproton-mailtutatutanotamailbox-orgfastmailposteomailfencestartmailheyskiffmigadurunboxmxroutestalwartmail-in-a-boxmaddy2026deep-diveenglish https://www.youngju.dev/blog/culture/2026-05-16-privacy-email-providers-2026-proton-tuta-mailbox-fastmail-posteo-skiff-rip-deep-dive.ja https://www.youngju.dev/blog/culture/2026-05-16-privacy-email-providers-2026-proton-tuta-mailbox-fastmail-posteo-skiff-rip-deep-dive.ja 2026年現在のプライバシー重視メール市場の地図を描く。ProtonMail（スイス、最大のE2EE）、Tuta（ドイツ、旧 Tutanota — ポスト量子の先駆者）、Mailbox.org（ドイツ、ビジネス向け）、Fastmail（オーストラリア、E2EEではないが強力なプライバシー）、Posteo（月1ユーロのドイツ製オープンソース）、Mailfence、StartMail、Hey（37signals）、Skiff（2024年2月 Notionが買収 → RIP）、Migadu / Runbox / MXroute のような有料代替、Stalwart / Mail-in-a-box / Maddy / Postal のようなセルフホスティング。韓国（Daum / Naver / Kakao）と日本（Yahoo!メール / Gmail JP / So-net / OCN / ConoHa Mail）市場の比較まで。誰が何を選ぶべきかをまとめる。 Sat, 16 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) emailprivacyproton-mailtutatutanotamailbox-orgfastmailposteomailfencestartmailheyskiffmigadurunboxmxroutestalwartmail-in-a-boxmaddy2026deep-dive日本語 https://www.youngju.dev/blog/culture/2026-05-16-privacy-email-providers-2026-proton-tuta-mailbox-fastmail-posteo-skiff-rip-deep-dive https://www.youngju.dev/blog/culture/2026-05-16-privacy-email-providers-2026-proton-tuta-mailbox-fastmail-posteo-skiff-rip-deep-dive 2026년 현재 프라이버시 이메일 시장의 지도를 그린다. ProtonMail(스위스, 가장 큰 E2EE), Tuta(독일, 구 Tutanota — post-quantum 선구자), Mailbox.org(독일, 비즈니스 친화), Fastmail(호주, E2EE는 아니지만 강력한 프라이버시), Posteo(€1/월 독일 오픈소스), Mailfence, StartMail, Hey(37signals), Skiff(2024년 2월 Notion 인수 → RIP), Migadu·Runbox·MXroute 같은 paid 알트, Stalwart·Mail-in-a-box·Maddy·Postal 같은 셀프호스팅. 한국(다음/네이버/카카오)과 일본(Yahoo!メール·Gmail JP·So-net·OCN·ConoHa) 시장 비교까지. 누가 무엇을 골라야 하는지를 정리한다. Sat, 16 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) emailprivacyproton-mailtutatutanotamailbox-orgfastmailposteomailfencestartmailheyskiffmigadurunboxmxroutestalwartmail-in-a-boxmaddy2026deep-dive