オープンソースSaaS代替・セルフホスト＆商用OSS (COSS) ベンチマーク

64 プロジェクト

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オープンソースプロジェクト · GitHubスター数
プロジェクト	概要	ライセンス＆技術	Stars	月間訪問	商用状況
RoundCuberoundcube/roundcubemail代替：Gmail · Modern Open Source Webmail, Calendar, Contacts Client	Modern Open Source Webmail, Calendar, Contacts Client	GPL	7,270	155.5K	—
Inbox ZeroCOSSelie222/inbox-zeroMeet your AI email assistant that actually works	Meet your AI email assistant that actually works	AGPL	5,533	89.3K	$10K自己申告
ZeroCOSSMail-0/ZeroAI Powered Email, Built to Save You Time	AI Powered Email, Built to Save You Time	MIT	5,013	9.3K	$20/月
Mail0Mail-0/ZeroAI Powered Email, Built to Save You Time	AI Powered Email, Built to Save You Time	MIT	5,013	<5K	—
Cyphtcypht-org/cypht代替：Gmail · All your E-mail, from all your accounts, in one place	All your E-mail, from all your accounts, in one place	LGPL	1,794	5.8K	—
SnappyMailthe-djmaze/snappymail代替：Gmail · Simple, modern, and fast web-based mail client	Simple, modern, and fast web-based mail client	AGPL	1,754	14.2K	—
Cloud Mailmaillab/cloud-mailSimple email service on Cloudflare Workers	Simple email service on Cloudflare Workers	MIT	1,683	12.7K	—
Bulwarkbulwarkmail/webmail代替：Gmail · Webmail for Stalwart Mail Server.	Webmail for Stalwart Mail Server.	Fair-code	1,462	7.4K	—
MailSpringCOSSFoundry376/MailspringThe fast, beautiful email client for people who take email seriously.	The fast, beautiful email client for people who take email seriously.	GPL	1,293	195.4K	$8/月
TutanotaCOSStutao/tutanotaTurn ON Privacy	Turn ON Privacy	GPL	890	658.4K	$3/月
MailFlowmaathimself/mailflow代替：Gmail · All your email. One beautiful home.	All your email. One beautiful home.	AGPL	680	<5K	—
Kurrierkurrier-org/kurrierEmail, calendar, contacts, and storage	Email, calendar, contacts, and storage	—	317	<5K	—
UnInboxCOSSun/inboxShared inboxes, infinite addresses, and per email workflows.and it's open source.	Shared inboxes, infinite addresses, and per email workflows.and it's open source.	MIT	177	<5K	$12/月
HermesSEGCOSSdeeztek/Hermes-Secure-Email-Gateway代替：Google Calendar · Self-hosted email security, mail server, calendar, contacts, files, groupware — one stack.	Self-hosted email security, mail server, calendar, contacts, files, groupware — one stack.	AGPL	142	<5K	$29/月
MailPilemailpile/Mailpile\- a Free and open source privacy focused email client	\- a Free and open source privacy focused email client	OFL-1.1	85	<5K	—
Thunderbirdthunderbird/thunderbird-websiteFree Your Inbox	Free Your Inbox	—	73	1.8M	—
RainLoopRainLoop/rainloop-webmailSimple, modern & fast web-based email client	Simple, modern & fast web-based email client	AGPL	51	<5K	—
HEYCOSSbasecamp/hey-cliWe finally fixed your email + calendar!	We finally fixed your email + calendar!	MIT	30	841.5K	$10/月
Left on ReadLeft-on-Read/leftonreadWhat will you learn from your texts?	What will you learn from your texts?	—	24	<5K	—
FollowUpCOSSnewrelic/newrelic-browser-agentUpgrade your inbox	Upgrade your inbox	Apache	19	<5K	$23/月
NeatMailCOSSLakshay1509/NeatMailThe AI email assistant that never drops a promise.	The AI email assistant that never drops a promise.	—	19	<5K	$9/月
NeatMailCOSSLakshay1509/NeatMailThe AI email assistant that never drops a promise.	The AI email assistant that never drops a promise.	—	19	<5K	$9/月
Clear My SpamCOSSjonathanchen7/clearmyspamInbox zero made easy.	Inbox zero made easy.	—	17	<5K	$8/月
MailVaultCOSSGraphicMeat/mail-vault-appYour email. Yours to keep.	Your email. Yours to keep.	—	13	<5K	$4/月
BAREMAIL ʕmatt-virgo/baremailemail's bare necessities	email's bare necessities	—	11	<5K	—
OpenMessageMCPMaxGhenis/openmessagePeople-first multi-platform	People-first multi-platform	Unlicense	8	<5K	—
Octobudoctobud-hq/octobudSuperfast Inbox For Your GitHub Notifications	Superfast Inbox For Your GitHub Notifications	AGPL	7	<5K	—
SkiffCOSSskiff-org/skiff-org.github.ioWe are excited to share that Skiff has joined Notion.	We are excited to share that Skiff has joined Notion.	—	5	22.9K	$8/月
MephistoMailjokallame350-lang/temp-mailmephistoStop giving away your real email. Use Mephisto to stay anonymous. Unlimited, free, and instant disposable emails.	Stop giving away your real email. Use Mephisto to stay anonymous. Unlimited, free, and instant disposable emails.	MIT	5	<5K	—
GodwitMCPgodwit-email/godwitAn open-source, AI-nativeemail client you can extend	An open-source, AI-nativeemail client you can extend	Apache	5	<5K	—

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