diff --git a/frameworks/rails/Dockerfile b/frameworks/rails/Dockerfile
new file mode 100644
index 0000000..0e7d540
--- /dev/null
+++ b/frameworks/rails/Dockerfile
@@ -0,0 +1,16 @@
+FROM ruby:3.4-slim
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends build-essential libsqlite3-dev libyaml-dev && \
+    rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY Gemfile .
+RUN bundle install --jobs=$(nproc)
+
+COPY . .
+
+EXPOSE 8080
+
+CMD ["bundle", "exec", "puma", "-C", "config/puma.rb"]
diff --git a/frameworks/rails/Gemfile b/frameworks/rails/Gemfile
new file mode 100644
index 0000000..2dbd79b
--- /dev/null
+++ b/frameworks/rails/Gemfile
@@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+
+gem 'rails', '~> 8.0'
+gem 'puma', '~> 6.5'
+gem 'sqlite3', '~> 2.6'
diff --git a/frameworks/rails/app/controllers/benchmark_controller.rb b/frameworks/rails/app/controllers/benchmark_controller.rb
new file mode 100644
index 0000000..6ee6942
--- /dev/null
+++ b/frameworks/rails/app/controllers/benchmark_controller.rb
@@ -0,0 +1,121 @@
+require 'json'
+require 'zlib'
+require 'stringio'
+require 'sqlite3'
+
+class BenchmarkController < ActionController::API
+  # Pre-load datasets at class level (shared across workers via preload)
+  DATASET_PATH = ENV.fetch('DATASET_PATH', '/data/dataset.json')
+  LARGE_DATASET_PATH = '/data/dataset-large.json'
+
+  @@json_payload = nil
+  @@compressed_payload = nil
+  @@db_available = File.exist?('/data/benchmark.db')
+
+  if File.exist?(DATASET_PATH)
+    raw = JSON.parse(File.read(DATASET_PATH))
+    items = raw.map { |d| d.merge('total' => (d['price'] * d['quantity'] * 100).round / 100.0) }
+    @@json_payload = JSON.generate({ 'items' => items, 'count' => items.length })
+  end
+
+  if File.exist?(LARGE_DATASET_PATH)
+    raw = JSON.parse(File.read(LARGE_DATASET_PATH))
+    items = raw.map { |d| d.merge('total' => (d['price'] * d['quantity'] * 100).round / 100.0) }
+    payload = JSON.generate({ 'items' => items, 'count' => items.length })
+    sio = StringIO.new
+    gz = Zlib::GzipWriter.new(sio, 1)
+    gz.write(payload)
+    gz.close
+    @@compressed_payload = sio.string
+  end
+
+  DB_QUERY = 'SELECT id, name, category, price, quantity, active, tags, rating_score, rating_count FROM items WHERE price BETWEEN ? AND ? LIMIT 50'
+
+  def pipeline
+    response.headers['Server'] = 'rails'
+    render plain: 'ok'
+  end
+
+  def baseline11
+    total = 0
+    request.query_parameters.each_value do |v|
+      total += v.to_i if v =~ /\A-?\d+\z/
+    end
+    if request.post?
+      body_str = request.body.read.to_s.strip
+      total += body_str.to_i if body_str =~ /\A-?\d+\z/
+    end
+    response.headers['Server'] = 'rails'
+    render plain: total.to_s
+  end
+
+  def baseline2
+    total = 0
+    request.query_parameters.each_value do |v|
+      total += v.to_i if v =~ /\A-?\d+\z/
+    end
+    response.headers['Server'] = 'rails'
+    render plain: total.to_s
+  end
+
+  def json_endpoint
+    if @@json_payload
+      response.headers['Server'] = 'rails'
+      response.headers['Content-Type'] = 'application/json'
+      render plain: @@json_payload
+    else
+      head 500
+    end
+  end
+
+  def compression
+    if @@compressed_payload
+      response.headers['Server'] = 'rails'
+      response.headers['Content-Type'] = 'application/json'
+      response.headers['Content-Encoding'] = 'gzip'
+      send_data @@compressed_payload, disposition: :inline
+    else
+      head 500
+    end
+  end
+
+  def db
+    unless @@db_available
+      response.headers['Server'] = 'rails'
+      render json: { items: [], count: 0 }
+      return
+    end
+
+    min_val = (params[:min] || 10).to_f
+    max_val = (params[:max] || 50).to_f
+    conn = get_db
+    rows = conn.execute(DB_QUERY, [min_val, max_val])
+    items = rows.map do |r|
+      {
+        'id' => r['id'], 'name' => r['name'], 'category' => r['category'],
+        'price' => r['price'], 'quantity' => r['quantity'], 'active' => r['active'] == 1,
+        'tags' => JSON.parse(r['tags']),
+        'rating' => { 'score' => r['rating_score'], 'count' => r['rating_count'] }
+      }
+    end
+    response.headers['Server'] = 'rails'
+    render json: { items: items, count: items.length }
+  end
+
+  def upload
+    data = request.body.read
+    response.headers['Server'] = 'rails'
+    render plain: data.bytesize.to_s
+  end
+
+  private
+
+  def get_db
+    Thread.current[:rails_db] ||= begin
+      db = SQLite3::Database.new('/data/benchmark.db', readonly: true)
+      db.execute('PRAGMA mmap_size=268435456')
+      db.results_as_hash = true
+      db
+    end
+  end
+end
diff --git a/frameworks/rails/config.ru b/frameworks/rails/config.ru
new file mode 100644
index 0000000..47bbd40
--- /dev/null
+++ b/frameworks/rails/config.ru
@@ -0,0 +1,2 @@
+require_relative 'config/environment'
+run Rails.application
diff --git a/frameworks/rails/config/application.rb b/frameworks/rails/config/application.rb
new file mode 100644
index 0000000..8c42f25
--- /dev/null
+++ b/frameworks/rails/config/application.rb
@@ -0,0 +1,24 @@
+require 'rails'
+require 'action_controller/railtie'
+
+class BenchmarkApp < Rails::Application
+  config.load_defaults 8.0
+  config.eager_load = true
+  config.api_only = true
+  config.secret_key_base = 'benchmark-not-secret'
+  config.hosts.clear
+  config.consider_all_requests_local = false
+
+  # Disable all middleware we don't need
+  config.middleware.delete ActionDispatch::HostAuthorization
+  config.middleware.delete ActionDispatch::Callbacks
+  config.middleware.delete ActionDispatch::ActionableExceptions
+  config.middleware.delete ActionDispatch::RemoteIp
+  config.middleware.delete ActionDispatch::RequestId
+  config.middleware.delete Rails::Rack::Logger
+  config.middleware.delete ActionDispatch::ShowExceptions
+
+  # Silence logging
+  config.logger = Logger.new('/dev/null')
+  config.log_level = :fatal
+end
diff --git a/frameworks/rails/config/environment.rb b/frameworks/rails/config/environment.rb
new file mode 100644
index 0000000..5e8656e
--- /dev/null
+++ b/frameworks/rails/config/environment.rb
@@ -0,0 +1,2 @@
+require_relative 'application'
+Rails.application.initialize!
diff --git a/frameworks/rails/config/puma.rb b/frameworks/rails/config/puma.rb
new file mode 100644
index 0000000..83f434e
--- /dev/null
+++ b/frameworks/rails/config/puma.rb
@@ -0,0 +1,13 @@
+require 'etc'
+
+cores = Etc.nprocessors
+workers cores
+threads 4, 4
+
+bind 'tcp://0.0.0.0:8080'
+
+preload_app!
+
+before_fork do
+  # Close any inherited DB connections
+end
diff --git a/frameworks/rails/config/routes.rb b/frameworks/rails/config/routes.rb
new file mode 100644
index 0000000..bf4de50
--- /dev/null
+++ b/frameworks/rails/config/routes.rb
@@ -0,0 +1,10 @@
+Rails.application.routes.draw do
+  get  '/pipeline',    to: 'benchmark#pipeline'
+  get  '/baseline11',  to: 'benchmark#baseline11'
+  post '/baseline11',  to: 'benchmark#baseline11'
+  get  '/baseline2',   to: 'benchmark#baseline2'
+  get  '/json',        to: 'benchmark#json_endpoint'
+  get  '/compression', to: 'benchmark#compression'
+  get  '/db',          to: 'benchmark#db'
+  post '/upload',      to: 'benchmark#upload'
+end
diff --git a/frameworks/rails/meta.json b/frameworks/rails/meta.json
new file mode 100644
index 0000000..4ace7d7
--- /dev/null
+++ b/frameworks/rails/meta.json
@@ -0,0 +1,19 @@
+{
+  "display_name": "Rails",
+  "language": "Ruby",
+  "type": "framework",
+  "engine": "puma",
+  "description": "Ruby on Rails (API mode) on Puma, multi-worker with one worker per CPU core.",
+  "repo": "https://github.com/rails/rails",
+  "enabled": true,
+  "tests": [
+    "baseline",
+    "pipelined",
+    "noisy",
+    "limited-conn",
+    "json",
+    "upload",
+    "compression",
+    "mixed"
+  ]
+}