diff --git a/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/config/SimpleLogParserConfig.kt b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/config/SimpleLogParserConfig.kt
index b727d4d9..9dcb1963 100644
--- a/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/config/SimpleLogParserConfig.kt
+++ b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/config/SimpleLogParserConfig.kt
@@ -51,6 +51,7 @@ public class SimpleLogParserConfig(private val builder: Builder) : LogParserConf
 			FabricApisProcessor(),
 			FabricImplProcessor(),
 			IncompatibleModProcessor(),
+			FabricModUsedWhenQuiltVersionExistsProcessor(),
 			CrashReportProcessor(),
 			JavaClassFileVersionProcessor(),
 			MixinErrorProcessor(),
diff --git a/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/data/Mod.kt b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/data/Mod.kt
index decb9168..94fdaa8f 100644
--- a/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/data/Mod.kt
+++ b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/data/Mod.kt
@@ -11,6 +11,9 @@ import org.quiltmc.community.cozy.modules.logs.Version
 public data class Mod(
 	val id: String,
 	val version: Version,
+
 	// Only present on Quilt Loader
-	val path: String?
+	val path: String?,
+	val hash: String?,
+	val type: String?
 )
diff --git a/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/parsers/fabric/FabricModsParser.kt b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/parsers/fabric/FabricModsParser.kt
index b29fd432..b96f843e 100644
--- a/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/parsers/fabric/FabricModsParser.kt
+++ b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/parsers/fabric/FabricModsParser.kt
@@ -37,6 +37,8 @@ public class FabricModsParser : LogParser() {
 					Mod(
 						split.first(),
 						Version(split.last()),
+						null,
+						null,
 						null
 					)
 				)
diff --git a/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/parsers/quilt/QuiltModsParser.kt b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/parsers/quilt/QuiltModsParser.kt
index f886167d..75e24d7e 100644
--- a/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/parsers/quilt/QuiltModsParser.kt
+++ b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/parsers/quilt/QuiltModsParser.kt
@@ -38,7 +38,7 @@ public class QuiltModsParser : LogParser() {
 
 		val lines = table
 			.split("\n")
-			.map { it.trim('|') }  // Don't strip spaces here, but do remove border pipes
+			.map { it.trim().trim('|') }  // Don't strip spaces here, but do remove border pipes
 			.toMutableList()
 
 		// The first line is the headers
@@ -73,7 +73,9 @@ public class QuiltModsParser : LogParser() {
 				Mod(
 					mod["id"]!!,
 					Version(mod["version"]!!),
-					mod["file(s)"]
+					mod["file(s)"],
+					mod["file hash (sha-1)"],
+					mod["type"]
 				)
 			)
 		}
diff --git a/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/processors/quilt/FabricModUsedWhenQuiltVersionExistsProcessor.kt b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/processors/quilt/FabricModUsedWhenQuiltVersionExistsProcessor.kt
new file mode 100644
index 00000000..fd6146be
--- /dev/null
+++ b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/processors/quilt/FabricModUsedWhenQuiltVersionExistsProcessor.kt
@@ -0,0 +1,148 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package org.quiltmc.community.cozy.modules.logs.processors.quilt
+
+import dev.kord.core.event.Event
+import io.ktor.client.call.*
+import io.ktor.client.request.*
+import io.ktor.http.*
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonArray
+import kotlinx.serialization.json.decodeFromJsonElement
+import org.quiltmc.community.cozy.modules.logs.Version
+import org.quiltmc.community.cozy.modules.logs.data.LoaderType
+import org.quiltmc.community.cozy.modules.logs.data.Log
+import org.quiltmc.community.cozy.modules.logs.data.Order
+import org.quiltmc.community.cozy.modules.logs.types.LogProcessor
+import java.util.*
+
+private const val MODRINTH_API_BASE = "https://api.modrinth.com/v2"
+
+public class FabricModUsedWhenQuiltVersionExistsProcessor : LogProcessor() {
+
+	override val identifier: String = "fabric-mod-used-when-quilt-version-exists"
+	override val order: Order = Order.Default
+	private val json = Json {
+		ignoreUnknownKeys = true
+	}
+
+	override suspend fun predicate(log: Log, event: Event): Boolean = log.getLoaderVersion(LoaderType.Quilt) != null
+
+	override suspend fun process(log: Log) {
+		val mcVersion = log.minecraftVersion?.string ?: log.getMod("minecraft")?.version?.string ?: return
+
+		val hashToMod = log.getMods().values.filter {
+			it.type?.lowercase(Locale.getDefault()) == "fabric" && it.hash != null
+		}.associateBy { it.hash!! }
+		if (hashToMod.isEmpty()) return
+
+		val hashesRequest = client.post("$MODRINTH_API_BASE/version_files") {
+			setBody(json.encodeToString(HashLookupParam(hashToMod.keys.toList(), "sha1")))
+			contentType(ContentType.Application.Json)
+		}
+		if (hashesRequest.status != HttpStatusCode.OK) return
+
+		val projectIdToNoneQuiltVersions = json.decodeFromJsonElement<Map<String, Version>>(hashesRequest.body())
+			.filter { !it.value.loaders.contains("quilt") }
+			.map { (hash, version) -> version.projectId to hashToMod[hash] }
+			.toMap()
+		if (projectIdToNoneQuiltVersions.isEmpty()) return
+
+		val projectsRequest = client.get("$MODRINTH_API_BASE/projects") {
+			url {
+				parameters.append("ids", json.encodeToString(projectIdToNoneQuiltVersions.keys.toList()))
+			}
+		}
+		if (projectsRequest.status != HttpStatusCode.OK) return
+
+		val body = projectsRequest.body<JsonArray>()
+		val potentialBetterVersionCandidates = json.decodeFromJsonElement<List<Project>>(body)
+			.filter { it.gameVersions.contains(mcVersion) && it.loaders.contains("quilt") }
+			.flatMap { it.versions }
+		if (potentialBetterVersionCandidates.isEmpty()) return
+
+		val versionsRequest = client.get("$MODRINTH_API_BASE/versions") {
+			url {
+				parameters.append("ids", json.encodeToString(potentialBetterVersionCandidates))
+			}
+		}
+		if (versionsRequest.status != HttpStatusCode.OK) return
+
+		val modIdToProjectVersion = mutableMapOf<String, MutableList<Version>>()
+		json.decodeFromJsonElement<List<Version>>(versionsRequest.body())
+			.filter { it.loaders.contains("quilt") && it.gameVersions.contains(mcVersion) }
+			.forEach {
+				val mod = projectIdToNoneQuiltVersions[it.projectId]!!
+				val version = Version(removeLoaderIdentifier(it.versionNumber))
+				val oldVersion = Version(removeLoaderIdentifier(mod.version.string))
+				if (version >= oldVersion) {
+					modIdToProjectVersion.getOrPut(mod.id) { mutableListOf<Version>() }.add(it)
+				}
+			}
+		if (modIdToProjectVersion.isEmpty()) return
+
+		val modsWithNewerVersions = mutableListOf<String>()
+		for ((modid, versions) in modIdToProjectVersion) {
+			val mod = log.getMod(modid)!!
+			if (versions.size == 1) {
+				val version = versions[0]
+				val oldMod = projectIdToNoneQuiltVersions[version.projectId]!!
+				modsWithNewerVersions.add(
+					"`${mod.id}`: Switch from ${oldMod.version.string} to " +
+					"[${version.versionNumber} (Modrinth)]" +
+					"(https://modrinth.com/mod/${version.projectId}/version/${versions[0].id})"
+				)
+			} else {
+				modsWithNewerVersions.add(
+					"`${mod.id}`: See [Modrinth](https://modrinth.com/mod/" +
+					"${versions[0].projectId}/versions?l=quilt&v=$mcVersion)"
+				)
+			}
+		}
+		log.addMessage(
+			buildString {
+				appendLine(
+					"The following fabric mods are marked as fabric only on Modrinth, " +
+					"but newer or alternative versions with explicit quilt support exist:"
+				)
+				for (mod in modsWithNewerVersions) {
+					appendLine(" - $mod")
+				}
+			}
+		)
+	}
+
+	private fun removeLoaderIdentifier(versionNumber: String): String = versionNumber.lowercase()
+		.replace(Regex("quilt[-+ ]"), "")
+		.replace(Regex("fabric[-+ ]"), "")
+		.replace(Regex("[-+ ]quilt"), "")
+		.replace(Regex("[-+ ]fabric"), "")
+		.replace("quilt", "")
+		.replace("fabric", "")
+
+	@Serializable
+	public data class Project(
+		public val versions: List<String>,
+		@SerialName("game_versions") public val gameVersions: List<String>,
+		public val loaders: List<String>
+	)
+
+	@Serializable
+	public data class HashLookupParam(public val hashes: List<String>, public val algorithm: String)
+
+	@Serializable
+	public data class Version(
+		public val loaders: List<String>,
+		@SerialName("project_id") public val projectId: String,
+		@SerialName("version_number") public val versionNumber: String,
+		@SerialName("game_versions") public val gameVersions: List<String>,
+		public val id: String
+	)
+}
diff --git a/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/types/LogProcessor.kt b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/types/LogProcessor.kt
index f5570406..ac3049c8 100644
--- a/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/types/LogProcessor.kt
+++ b/module-log-parser/src/main/kotlin/org/quiltmc/community/cozy/modules/logs/types/LogProcessor.kt
@@ -11,6 +11,7 @@ import com.kotlindiscord.kord.extensions.koin.KordExKoinComponent
 import dev.kord.core.event.Event
 import io.ktor.client.*
 import io.ktor.client.engine.cio.*
+import io.ktor.client.plugins.*
 import io.ktor.client.plugins.contentnegotiation.*
 import io.ktor.http.*
 import io.ktor.serialization.kotlinx.json.*
@@ -30,6 +31,9 @@ public abstract class LogProcessor : BaseLogHandler, KordExKoinComponent {
 				ContentType.Any
 			)
 		}
+		install(UserAgent) {
+			agent = "QuiltMC/cozy-discord (quiltmc.org)"
+		}
 	}
 
 	protected open suspend fun predicate(log: Log, event: Event): Boolean =