diff --git a/acct-group/dendrite/dendrite-0.ebuild b/acct-group/dendrite/dendrite-0.ebuild
new file mode 100644
index 0000000..6d47c62
--- /dev/null
+++ b/acct-group/dendrite/dendrite-0.ebuild
@@ -0,0 +1,6 @@
+# Copyright 2026 Shin'ya Minazuki
+EAPI=8
+
+inherit acct-group
+
+ACCT_GROUP_ID=-1
diff --git a/acct-user/dendrite/dendrite-0.ebuild b/acct-user/dendrite/dendrite-0.ebuild
new file mode 100644
index 0000000..e3918da
--- /dev/null
+++ b/acct-user/dendrite/dendrite-0.ebuild
@@ -0,0 +1,10 @@
+# Copyright 2026 Shin'ya Minazuki
+EAPI=8
+
+inherit acct-user
+
+DESCRIPTION="Second-generation Matrix homeserver"
+ACCT_USER_ID=-1
+ACCT_USER_GROUPS=( dendrite )
+
+acct-user_add_deps
diff --git a/net-im/dendrite/Manifest b/net-im/dendrite/Manifest
new file mode 100644
index 0000000..c680768
--- /dev/null
+++ b/net-im/dendrite/Manifest
@@ -0,0 +1,2 @@
+DIST dendrite-0.15.2-deps.tar.gz 52968232 BLAKE2B 44daa7e12d929a167c954e6f386c4455e26b59727d495be778e06b64ca064cb47c34bab176255211ac07c78ec393a8182c702cb62a828a0dbf2ac8f2120098ed SHA512 8e997ce1dbd325e863b4d804d3e4e40f882a17eed467300a4ea64429795bd40ad99fcf82a4df326f7067d30d3faacfcc39c82f03d7881cb6432a498caed6c749
+DIST dendrite-0.15.2.tar.gz 1347612 BLAKE2B 5e9c9c5c8adb8797a6f2e72f8eb7d4b1cb96b1e44b212532927e9221a3479963ec2fa6da6ff03ddc0d8e8d23178742b04154f0171767f3d61fe3456b42c48c8c SHA512 30a9327133af76a4ef06d961931698d55acbd3c175209aa100886794bc06309acb5953ed9e43ada676af0717461fd2fd8c821a04e829302fdcf4f3a7bbffa1cd
diff --git a/net-im/dendrite/dendrite-0.15.2.ebuild b/net-im/dendrite/dendrite-0.15.2.ebuild
new file mode 100644
index 0000000..bd28bd4
--- /dev/null
+++ b/net-im/dendrite/dendrite-0.15.2.ebuild
@@ -0,0 +1,42 @@
+# Copyright 2026 Shin'ya Minazuki
+EAPI=8
+
+inherit go-module optfeature
+
+DESCRIPTION="Second-generation Matrix homeserver"
+HOMEPAGE="https://github.com/element-hq/dendrite"
+SRC_URI="
+	https://mirror.chaotic.ninja/software/${PN}/${P}.tar.gz
+	https://mirror.chaotic.ninja/software/${PN}/${P}-deps.tar.gz
+"
+
+# There are several other licenses around for the dependencies
+# Not mentioning them here, it would get too long
+LICENSE="AGPL-3+"
+SLOT="0"
+KEYWORDS="~amd64"
+
+RESTRICT="mirror"
+
+DEPEND="${RDEPEND}"
+RDEPEND="
+	acct-user/dendrite
+	acct-group/dendrite
+"
+
+src_compile() {
+	ego build -tags goolm -trimpath -v -o bin/ ./cmd/...
+}
+
+src_install() {
+	newsbin bin/${PN} "${PN}"
+	newsbin bin/create-account "${PN}-create-account"
+	newsbin bin/generate-config "${PN}-generate-config"
+	newsbin bin/generate-keys "${PN}-generate-keys"
+	newsbin bin/resolve-state "${PN}-resolve-state"
+	newinitd "${FILESDIR}/${PN}.initd-r0" "${PN}"
+}
+
+pkg_postinst() {
+	optfeature "running a server in production environments" dev-db/postgresql
+}
diff --git a/net-im/dendrite/files/dendrite.initd-r0 b/net-im/dendrite/files/dendrite.initd-r0
new file mode 100644
index 0000000..3e3f68f
--- /dev/null
+++ b/net-im/dendrite/files/dendrite.initd-r0
@@ -0,0 +1,25 @@
+#!/sbin/openrc-run
+# Copyright 2026 Shin'ya Minazuki
+
+supervisor="supervise-daemon"
+
+command="/usr/sbin/${RC_SVCNAME}"
+command_args="--config /etc/${RC_SVCNAME}.yaml"
+command_user="${RC_SVCNAME}"
+command_background="true"
+pidfile="/run/${RC_SVCNAME}.pid"
+
+depend() {
+	# PostgreSQL is not listed here due to the SLOT mechanism
+	# used by the package manager.
+	# Latest stable version to date is postgresql-18
+	want caddy nginx
+}
+
+start_pre() {
+	if ! checkpath --file /etc/${RC_SVCNAME}.yaml -; then
+		eerror "You need a configuration file to proceed"
+		eerror "See /usr/sbin/dendrite-generate-config"
+	fi
+	eend $?
+}
diff --git a/net-im/dendrite/metadata.xml b/net-im/dendrite/metadata.xml
new file mode 100644
index 0000000..87dcb67
--- /dev/null
+++ b/net-im/dendrite/metadata.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>shinyoukai@laidback.moe</email>
+		<name>Shin'ya Minazuki</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">element-hq/dendrite</remote-id>
+	</upstream>
+</pkgmetadata>