diff --git a/.env.example b/.env.example
index f543d4bf..a2bf7bce 100644
--- a/.env.example
+++ b/.env.example
@@ -58,4 +58,8 @@ MAIL_HACKCLUB_TOKEN=replace_me
 
 # Hack Club Account
 HCA_CLIENT_ID=your_hackclub_account_client_id_here
-HCA_CLIENT_SECRET=your_hackclub_account_secret_id_here
\ No newline at end of file
+HCA_CLIENT_SECRET=your_hackclub_account_secret_id_here
+
+# PostHog Analytics
+POSTHOG_API_KEY=your_posthog_api_key_here
+POSTHOG_HOST=https://us.i.posthog.com
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
index fd10c40d..998082f8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -86,6 +86,9 @@ gem "flamegraph"
 
 gem "skylight"
 
+# Analytics
+gem "posthog-ruby"
+
 gem "geocoder"
 
 # Airtable syncing
diff --git a/Gemfile.lock b/Gemfile.lock
index 59c2756c..feb22eb3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -337,6 +337,8 @@ GEM
     pg (1.6.3-arm64-darwin)
     pg (1.6.3-x86_64-linux)
     pg (1.6.3-x86_64-linux-musl)
+    posthog-ruby (3.4.0)
+      concurrent-ruby (~> 1)
     pp (0.6.3)
       prettyprint
     prettyprint (0.2.0)
@@ -636,6 +638,7 @@ DEPENDENCIES
   oj
   paper_trail
   pg
+  posthog-ruby
   propshaft
   public_activity
   puma (>= 5.0)
diff --git a/app/controllers/api/hackatime/v1/hackatime_controller.rb b/app/controllers/api/hackatime/v1/hackatime_controller.rb
index 17872da8..1dfb1614 100644
--- a/app/controllers/api/hackatime/v1/hackatime_controller.rb
+++ b/app/controllers/api/hackatime/v1/hackatime_controller.rb
@@ -256,6 +256,8 @@ def handle_heartbeat(heartbeat_array)
       Rails.logger.error("Error creating heartbeat: #{e.class.name} #{e.message}")
       results << [ { error: e.message, type: e.class.name }, 422 ]
     end
+
+    PosthogService.capture_once_per_day(@user, "heartbeat_sent", { heartbeat_count: heartbeat_array.size })
     results
   end
 
diff --git a/app/controllers/sessions_controller.rb b/app/controllers/sessions_controller.rb
index 27e5792e..489174d4 100644
--- a/app/controllers/sessions_controller.rb
+++ b/app/controllers/sessions_controller.rb
@@ -33,6 +33,9 @@ def hca_create
         MigrateUserFromHackatimeJob.perform_later(@user.id)
       end
 
+      PosthogService.identify(@user)
+      PosthogService.capture(@user, "user_signed_in", { method: "hca" })
+
       if @user.created_at > 5.seconds.ago
         session[:return_data] = { "url" => safe_return_url(params[:continue].presence) }
         Rails.logger.info("Sessions return data: #{session[:return_data]}")
@@ -81,6 +84,9 @@ def slack_create
         MigrateUserFromHackatimeJob.perform_later(@user.id)
       end
 
+      PosthogService.identify(@user)
+      PosthogService.capture(@user, "user_signed_in", { method: "slack" })
+
       state = JSON.parse(params[:state]) rescue {}
       if state["close_window"]
         redirect_to close_window_path
@@ -132,6 +138,7 @@ def github_create
     @user = User.from_github_token(params[:code], redirect_uri, current_user)
 
     if @user&.persisted?
+      PosthogService.capture(@user, "github_linked")
       redirect_to my_settings_path, notice: "Successfully linked GitHub account!"
     else
       Rails.logger.error "Failed to link GitHub account"
@@ -250,6 +257,10 @@ def token
       session[:user_id] = valid_token.user_id
       session[:return_data] = valid_token.return_data || {}
 
+      user = User.find(valid_token.user_id)
+      PosthogService.identify(user)
+      PosthogService.capture(user, "user_signed_in", { method: "email" })
+
       if valid_token.continue_param.present? && safe_return_url(valid_token.continue_param).present?
         redirect_to safe_return_url(valid_token.continue_param), notice: "Successfully signed in!"
       else
@@ -293,6 +304,7 @@ def stop_impersonating
   end
 
   def destroy
+    PosthogService.capture(session[:user_id], "user_signed_out") if session[:user_id]
     session[:user_id] = nil
     session[:impersonater_user_id] = nil
     redirect_to root_path, notice: "Signed out!"
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index b9a2487f..9d6f7abb 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -18,6 +18,7 @@ def update
         if @user.uses_slack_status?
           @user.update_slack_status
         end
+        PosthogService.capture(@user, "settings_updated", { fields: user_params.keys })
         redirect_to is_own_settings? ? my_settings_path : settings_user_path(@user),
           notice: "Settings updated successfully"
       else
@@ -44,6 +45,7 @@ def rotate_api_key
 
       new_api_key = @user.api_keys.create!(name: "Hackatime key")
 
+      PosthogService.capture(@user, "api_key_rotated")
       render json: { token: new_api_key.token }, status: :ok
     end
   rescue => e
@@ -54,6 +56,12 @@ def rotate_api_key
   def wakatime_setup
     api_key = current_user&.api_keys&.last
     api_key ||= current_user.api_keys.create!(name: "Wakatime API Key")
+    @current_user_api_key = api_key&.token
+    PosthogService.capture(current_user, "setup_started", { step: 1 })
+  end
+
+  def wakatime_setup_step_2
+    PosthogService.capture(current_user, "setup_step_viewed", { step: 2 })
     setup_os = detect_setup_os(request.user_agent)
 
     render inertia: "WakatimeSetup/Index", props: {
@@ -71,6 +79,20 @@ def wakatime_setup_step_2
   def wakatime_setup_step_3
     api_key = current_user&.api_keys&.last
     api_key ||= current_user.api_keys.create!(name: "Wakatime API Key")
+
+    @current_user_api_key = api_key&.token
+    PosthogService.capture(current_user, "setup_step_viewed", { step: 3 })
+  end
+
+  def wakatime_setup_step_4
+    @no_instruction_wording = [
+      "There is no step 4, lol.",
+      "There is no step 4, psych!",
+      "Tricked ya! There is no step 4.",
+      "There is no step 4, gotcha!"
+    ].sample
+    PosthogService.capture(current_user, "setup_completed", { step: 4 })
+
     editor = params[:editor]
 
     render inertia: "WakatimeSetup/Step3", props: {
diff --git a/app/models/user.rb b/app/models/user.rb
index a0044cad..17d6da5c 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -307,6 +307,8 @@ def invalidate_activity_graph_cache
 
   def create_signup_activity
     create_activity :first_signup, owner: self
+    PosthogService.identify(self)
+    PosthogService.capture(self, "account_created", { source: "signup" })
   end
 
   def normalize_username
diff --git a/app/services/posthog_service.rb b/app/services/posthog_service.rb
new file mode 100644
index 00000000..78d8db13
--- /dev/null
+++ b/app/services/posthog_service.rb
@@ -0,0 +1,47 @@
+class PosthogService
+  class << self
+    def capture(user_or_id, event, properties = {})
+      return unless $posthog
+
+      distinct_id = user_or_id.is_a?(User) ? user_or_id.id.to_s : user_or_id.to_s
+
+      $posthog.capture(
+        distinct_id: distinct_id,
+        event: event,
+        properties: properties
+      )
+    rescue => e
+      Rails.logger.error "PostHog capture error: #{e.message}"
+    end
+
+    def identify(user, properties = {})
+      return unless $posthog
+
+      $posthog.identify(
+        distinct_id: user.id.to_s,
+        properties: {
+          slack_uid: user.slack_uid,
+          username: user.username,
+          timezone: user.timezone,
+          country_code: user.country_code,
+          created_at: user.created_at&.iso8601,
+          admin_level: user.admin_level
+        }.merge(properties)
+      )
+    rescue => e
+      Rails.logger.error "PostHog identify error: #{e.message}"
+    end
+
+    def capture_once_per_day(user, event, properties = {})
+      return unless $posthog
+
+      cache_key = "posthog_daily:#{user.id}:#{event}:#{Date.current}"
+      return if Rails.cache.exist?(cache_key)
+
+      capture(user, event, properties)
+      Rails.cache.write(cache_key, true, expires_at: Date.current.end_of_day + 1.hour)
+    rescue => e
+      Rails.logger.error "PostHog capture_once_per_day error: #{e.message}"
+    end
+  end
+end
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index 35d59f6f..c69d4ba7 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -161,6 +161,26 @@
 
     <script defer data-domain="hackatime.hackclub.com" src="https://plausible.io/js/script.file-downloads.hash.js"></script>
 
+    <% if ENV['POSTHOG_API_KEY'].present? %>
+      <script>
+        !function(t,e){var o,n,p,r;e.__SV||(window.posthog=e,e._i=[],e.init=function(i,s,a){function g(t,e){var o=e.split(".");2==o.length&&(t=t[o[0]],e=o[1]),t[e]=function(){t.push([e].concat(Array.prototype.slice.call(arguments,0)))}}(p=t.createElement("script")).type="text/javascript",p.crossOrigin="anonymous",p.async=!0,p.src=s.api_host.replace('.i.posthog.com','-assets.i.posthog.com')+"/static/array.js",(r=t.getElementsByTagName("script")[0]).parentNode.insertBefore(p,r);var u=e;for(void 0!==a?u=e[a]=[]:a="posthog",u.people=u.people||[],u.toString=function(t){var e="posthog";return"posthog"!==a&&(e+="."+a),t||(e+=" (stub)"),e},u.people.toString=function(){return u.toString(1)+".people (stub)"},o="init capture identify alias people.set people.set_once set_config register register_once unregister opt_out_capturing has_opted_out_capturing opt_in_capturing reset isFeatureEnabled onFeatureFlags getFeatureFlag getFeatureFlagPayload reloadFeatureFlags group updateEarlyAccessFeatureEnrollment getEarlyAccessFeatures getActiveMatchingSurveys getSurveys getNextSurveyStep onSessionId setPersonProperties".split(" "),n=0;n<o.length;n++)g(u,o[n]);e._i.push([i,s,a])},e.__SV=1)}(document,window.posthog||[]);
+        posthog.init('<%= ENV['POSTHOG_API_KEY'] %>', {
+          api_host: '<%= ENV.fetch('POSTHOG_HOST', 'https://us.i.posthog.com') %>',
+          person_profiles: 'identified_only',
+          capture_pageview: true,
+          capture_pageleave: true,
+          autocapture: true
+        });
+        <% if current_user %>
+          posthog.identify('<%= current_user.id %>', {
+            slack_uid: '<%= current_user.slack_uid %>',
+            username: '<%= current_user.username %>',
+            timezone: '<%= current_user.timezone %>'
+          });
+        <% end %>
+      </script>
+    <% end %>
+
     <%# Includes all stylesheet files in app/assets/stylesheets %>
     <%= stylesheet_link_tag :app %>
     <%= stylesheet_link_tag 'tailwind', 'data-turbo-track': 'reload' %>
diff --git a/config/initializers/posthog.rb b/config/initializers/posthog.rb
new file mode 100644
index 00000000..174ee733
--- /dev/null
+++ b/config/initializers/posthog.rb
@@ -0,0 +1,11 @@
+require "posthog"
+
+if ENV["POSTHOG_API_KEY"].present?
+  $posthog = PostHog::Client.new({
+    api_key: ENV["POSTHOG_API_KEY"],
+    host: ENV.fetch("POSTHOG_HOST", "https://us.i.posthog.com"),
+    on_error: proc { |status, msg| Rails.logger.error "PostHog error: #{status} - #{msg}" }
+  })
+else
+  $posthog = nil
+end