Rails Metro

AnyCable — high-performance WebSocket server replacing ActionCable

authentication-zero (generates code you own, 2FA, recovery codes)

Action Policy for authorization (Rails-idiomatic, scoping, caching)

Azure Blob Storage for Active Storage file uploads

Solid Queue + Mission Control Jobs (Rails 8 default, no Redis)

Solid Cache (Rails 8 default, database-backed caching)

CarrierWave file upload library

Devise for full-featured authentication (OmniAuth, LDAP, etc.)

Faraday for composable HTTP client requests

Google Cloud Storage for Active Storage file uploads

GoodJob for Postgres-backed background jobs (no Redis needed)

Image processing for Active Storage variants using libvips (Rails 7+ recommended)

Invisible Captcha for honeypot-based spam prevention

Mobility for translatable model attributes (i18n)

acts_as_tenant for row-based multi-tenancy

OmniAuth for social/OAuth login (Google, GitHub, etc.)

Passwordless for magic-link email authentication

Pundit for simple, policy-based authorization

Cloudflare R2 for S3-compatible Active Storage (no egress fees)

Rails I18n locale data for 100+ languages

reCAPTCHA v3 for Google-powered bot protection

Rolify for role management (admin, editor, viewer, etc.)

AWS S3 for Active Storage file uploads

Recurring tasks with Solid Queue and solid_queue recurring

Shrine file attachment library — flexible alternative to Active Storage

Sidekiq for Redis-backed background jobs (high throughput)

Solid Cable (Rails 8 default, database-backed ActionCable)

AASM for state machines in ActiveRecord models

Split for A/B testing and experiments

Public Activity for activity feeds and timelines

Acts As List for sortable, orderable records

Acts As Votable for likes, upvotes, and reactions

Annotate models and routes with schema info

PaperTrail for model versioning and audit trail

Counter Culture for turbo-charged counter caches

Data Migrate for separating data migrations from schema migrations

Searchkick for Elasticsearch-powered search

Lockbox for application-level field encryption

Rails Event Store for event sourcing and CQRS

Geocoder for address lookup, geocoding, and distance queries

Kredis for structured Redis types in Rails models

Meilisearch for typo-tolerant, fast full-text search

Scenic for versioned database views

pg_search for PostgreSQL full-text search

Discard for soft deletes (archive instead of destroy)

Active Storage Validations for file type, size, and dimension checks

Strong Migrations -- catch unsafe migrations before they run

Acts As Taggable On for tagging models

AfterParty for one-time post-deploy tasks

Standard Ruby + ERB Lint for code and template linting

Circuitbox for circuit breaking on external service calls

Datadog APM for tracing, metrics, and log management

Kamal for zero-downtime deploys to any Linux box

Dotenv for loading .env files in development

Flipper for feature flags with web UI

OkComputer for health check endpoints (load balancers, k8s)

Honeybadger for error tracking and uptime monitoring

Hotwire LiveReload for automatic page refresh on file changes

Letter Opener for previewing emails in the browser (dev)

Letter Opener Web for browsable email inbox in development

Lograge for clean, single-line structured request logs

Turnout for easy maintenance mode pages

Maintenance Tasks (Shopify) for admin-triggered background tasks

New Relic APM for performance monitoring and observability

Rack Mini Profiler + Bullet for performance debugging

PgHero for Postgres performance dashboard

Pretender for user impersonation (admin support tool)

Stackprof + memory_profiler for CPU and memory profiling

Rack::Timeout for request timeout protection

Rack::Attack for throttling and blocking

Rollbar for real-time error tracking and debugging

Brakeman + bundler-audit for security scanning

Sentry for error tracking and performance monitoring

Hotwire Spark — hot reloading for HTML, CSS, and Ruby changes without full page reload

Action Text for rich text editing with Trix

Gretel for flexible breadcrumb navigation

Chartkick + Groupdate for charts and time-series visualization

Cloudinary for cloud image and video management

ViewComponent for component-based views

FriendlyId for human-readable URL slugs

Lucide Rails for modern SVG icons

Redcarpet for Markdown rendering with syntax highlighting

Pagy for fast, lightweight pagination

Grover for PDF generation from HTML (Puppeteer-based)

RQRCode for QR code generation (SVG, PNG, ANSI)

Ransack for object-based search and filter forms

Simple Calendar for month/week/day calendar views

Simple Form for easy, flexible form building

Caxlsx for Excel spreadsheet generation

Stimulus Components -- pre-built Stimulus controllers (dropdowns, modals, etc.)

Vite Rails for fast frontend bundling with HMR

Ahoy for visit and event tracking (first-party analytics)

Amplitude for product analytics, funnels, and retention

SQL analytics dashboards with Blazer

Clicky for real-time web analytics

Fathom -- simple, privacy-focused website analytics

Google Analytics 4 (GA4) for web analytics

Google Tag Manager for managing analytics and marketing tags

Heap for auto-captured product analytics

Matomo -- self-hosted open-source web analytics (Google Analytics alternative)

Mixpanel for event-based product analytics

Plausible -- privacy-focused analytics (no cookies, GDPR compliant)

PostHog product analytics (server-side + JS snippet)

StatCounter for visitor stats and web analytics

Amazon SES for high-volume email delivery

Mailgun for transactional email delivery

Noticed for multi-channel notifications

Postmark for fast transactional email (99%+ inbox delivery)

Resend for transactional and marketing email delivery

SendGrid for transactional and marketing email delivery

Sent.dm for multi-channel message delivery (email, SMS, push)

Slack Notifier for sending webhook notifications to Slack

Twilio for SMS, voice, and WhatsApp messaging

Web Push for browser push notifications

Lemon Squeezy -- merchant of record for SaaS (handles tax/VAT)

Mollie for European payment processing

Paddle -- merchant of record for SaaS (handles tax/VAT globally)

Pay + Stripe for subscriptions and billing

PayPal for payments, checkout, and subscriptions

RevenueCat for subscription management and in-app purchases

Solidus for full-featured e-commerce (products, orders, payments)

Rack CORS for cross-origin API requests

Rswag for Swagger/OpenAPI documentation from tests

API Guard for JWT authentication in Rails APIs

Alba for fast, flexible JSON serialization

Doorkeeper for OAuth2 provider (issue tokens, authorize apps)

GraphQL API with graphql-ruby

Incoming and outgoing webhook handling

Shoulda Matchers for one-liner model and controller test assertions

SimpleCov for code coverage reporting

VCR + WebMock for recording and replaying HTTP interactions in tests

FactoryBot + Faker + Capybara for testing

ActiveAdmin -- classic, battle-tested admin framework

Administrate -- Thoughtbot's lightweight admin framework

Avo -- modern, customizable admin panel framework

Madmin -- a modern admin framework by Chris Oliver (GoRails)

meta-tags + sitemap_generator for SEO