diff --git a/app/services/analytics_events.rb b/app/services/analytics_events.rb
index 5d5ca2f8a2f..ce83c4af51b 100644
--- a/app/services/analytics_events.rb
+++ b/app/services/analytics_events.rb
@@ -1323,14 +1323,6 @@ def idv_doc_auth_link_sent_visited(**extra)
     track_event('IdV: doc auth link_sent visited', **extra)
   end
 
-  def idv_doc_auth_randomizer_defaulted(**extra)
-    track_event(
-      'IdV: doc_auth random vendor error',
-      error: 'document_capture_session_uuid_key missing',
-      **extra,
-    )
-  end
-
   def idv_doc_auth_redo_ssn_submitted(**extra)
     track_event('IdV: doc auth redo_ssn submitted', **extra)
   end
diff --git a/app/services/doc_auth_router.rb b/app/services/doc_auth_router.rb
index 650c403b95c..a4c43f1d75f 100644
--- a/app/services/doc_auth_router.rb
+++ b/app/services/doc_auth_router.rb
@@ -196,9 +196,14 @@ def self.client(vendor:, warn_notifier: nil)
   # rubocop:enable Layout/LineLength
 
   def self.doc_auth_vendor_for_bucket(bucket)
-    bucket == :alternate_vendor ?
-      IdentityConfig.store.doc_auth_vendor_randomize_alternate_vendor :
-      IdentityConfig.store.doc_auth_vendor
+    case bucket
+    when :socure
+      Idp::Constants::Vendors::SOCURE
+    when :lexis_nexis
+      Idp::Constants::Vendors::LEXIS_NEXIS
+    else # e.g., nil
+      IdentityConfig.store.doc_auth_vendor_default
+    end
   end
 
   def self.doc_auth_vendor(
diff --git a/app/services/idv/analytics_events_enhancer.rb b/app/services/idv/analytics_events_enhancer.rb
index ab470910044..11163c5f185 100644
--- a/app/services/idv/analytics_events_enhancer.rb
+++ b/app/services/idv/analytics_events_enhancer.rb
@@ -25,7 +25,6 @@ module AnalyticsEventsEnhancer
       idv_doc_auth_hybrid_handoff_visited
       idv_doc_auth_link_sent_submitted
       idv_doc_auth_link_sent_visited
-      idv_doc_auth_randomizer_defaulted
       idv_doc_auth_redo_ssn_submitted
       idv_doc_auth_ssn_submitted
       idv_doc_auth_ssn_visited
diff --git a/config/application.yml.default b/config/application.yml.default
index a294ce55604..9bd4324aedc 100644
--- a/config/application.yml.default
+++ b/config/application.yml.default
@@ -97,9 +97,9 @@ doc_auth_max_submission_attempts_before_native_camera: 3
 doc_auth_selfie_desktop_test_mode: false
 doc_auth_separate_pages_enabled: false
 doc_auth_supported_country_codes: '["US", "GU", "VI", "AS", "MP", "PR", "USA" ,"GUM", "VIR", "ASM", "MNP", "PRI"]'
-doc_auth_vendor_randomize: false
-doc_auth_vendor_randomize_alternate_vendor: ''
-doc_auth_vendor_randomize_percent: 0
+doc_auth_vendor_lexis_nexis_percent: 100 # note, LN is currently the default vendor
+doc_auth_vendor_socure_percent: 0
+doc_auth_vendor_switching_enabled: false
 doc_capture_polling_enabled: true
 doc_capture_request_valid_for_minutes: 15
 drop_off_report_config: '[{"emails":["ursula@example.com"],"issuers": ["urn:gov:gsa:openidconnect.profiles:sp:sso:agency_name:app_name"]}]'
@@ -396,6 +396,7 @@ development:
   dashboard_url: http://localhost:3001/api/service_providers
   doc_auth_selfie_desktop_test_mode: true
   doc_auth_vendor: 'mock'
+  doc_auth_vendor_default: 'mock'
   domain_name: localhost:3000
   enable_rate_limiting: false
   hmac_fingerprinter_key: a2c813d4dca919340866ba58063e4072adc459b767a74cf2666d5c1eef3861db26708e7437abde1755eb24f4034386b0fea1850a1cb7e56bff8fae3cc6ade96c
@@ -452,7 +453,8 @@ production:
   dashboard_url: https://dashboard.demo.login.gov
   disable_email_sending: false
   disable_logout_get_request: false
-  doc_auth_vendor: 'acuant'
+  doc_auth_vendor: 'lexisnexis'
+  doc_auth_vendor_default: 'lexisnexis'
   domain_name: login.gov
   email_registrations_per_ip_track_only_mode: true
   enable_test_routes: false
@@ -507,6 +509,7 @@ test:
   doc_auth_max_attempts: 4
   doc_auth_selfie_desktop_test_mode: true
   doc_auth_vendor: 'mock'
+  doc_auth_vendor_default: 'mock'
   doc_capture_polling_enabled: false
   domain_name: www.example.com
   email_registrations_per_ip_limit: 3
diff --git a/config/initializers/ab_tests.rb b/config/initializers/ab_tests.rb
index 38b69641eed..70fdddd95c2 100644
--- a/config/initializers/ab_tests.rb
+++ b/config/initializers/ab_tests.rb
@@ -35,13 +35,17 @@ def self.all
     constants.index_with { |test_name| const_get(test_name) }
   end
 
+  # This "test" will permanently be in place to allow a graceful transition from TrueID being the
+  # sole vendor to a multi-vendor configuration.
   DOC_AUTH_VENDOR = AbTest.new(
     experiment_name: 'Doc Auth Vendor',
     should_log: /^idv/i,
+    default_bucket: :lexis_nexis,
     buckets: {
-      alternate_vendor: IdentityConfig.store.doc_auth_vendor_randomize ?
-        IdentityConfig.store.doc_auth_vendor_randomize_percent :
-        0,
+      socure: IdentityConfig.store.doc_auth_vendor_switching_enabled ?
+        IdentityConfig.store.doc_auth_vendor_socure_percent : 0,
+      lexis_nexis: IdentityConfig.store.doc_auth_vendor_switching_enabled ?
+        IdentityConfig.store.doc_auth_vendor_lexis_nexis_percent : 0,
     }.compact,
   ) do |service_provider:, session:, user:, user_session:, **|
     document_capture_session_uuid_discriminator(service_provider:, session:, user:, user_session:)
diff --git a/lib/ab_test.rb b/lib/ab_test.rb
index ef090aabe43..840cd1cc828 100644
--- a/lib/ab_test.rb
+++ b/lib/ab_test.rb
@@ -5,7 +5,7 @@ class AbTest
 
   MAX_SHA = (16 ** 64) - 1
 
-  # @param [Proc<String>,RegExp,string,Boolean,nil] should_log Controls whether bucket data for this
+  # @param [Proc<String>,Regexp,string,Boolean,nil] should_log Controls whether bucket data for this
   #                                                            A/B test is logged with specific
   #                                                            events.
   # @yieldparam [ActionDispatch::Request] request
diff --git a/lib/identity_config.rb b/lib/identity_config.rb
index 79d29a1d847..a4a6b515755 100644
--- a/lib/identity_config.rb
+++ b/lib/identity_config.rb
@@ -117,9 +117,10 @@ def self.store
     config.add(:doc_auth_separate_pages_enabled, type: :boolean)
     config.add(:doc_auth_supported_country_codes, type: :json)
     config.add(:doc_auth_vendor, type: :string)
-    config.add(:doc_auth_vendor_randomize, type: :boolean)
-    config.add(:doc_auth_vendor_randomize_alternate_vendor, type: :string)
-    config.add(:doc_auth_vendor_randomize_percent, type: :integer)
+    config.add(:doc_auth_vendor_default, type: :string)
+    config.add(:doc_auth_vendor_lexis_nexis_percent, type: :integer)
+    config.add(:doc_auth_vendor_socure_percent, type: :integer)
+    config.add(:doc_auth_vendor_switching_enabled, type: :boolean)
     config.add(:doc_capture_polling_enabled, type: :boolean)
     config.add(:doc_capture_request_valid_for_minutes, type: :integer)
     config.add(:drop_off_report_config, type: :json)
diff --git a/lib/idp/constants.rb b/lib/idp/constants.rb
index 5a3b32bce42..d7ba925e42d 100644
--- a/lib/idp/constants.rb
+++ b/lib/idp/constants.rb
@@ -12,6 +12,7 @@ module Constants
     module Vendors
       ACUANT = 'acuant'
       LEXIS_NEXIS = 'lexis_nexis'
+      SOCURE = 'socure'
       MOCK = 'mock'
       USPS = 'usps'
       AAMVA = 'aamva'
diff --git a/spec/config/initializers/ab_tests_spec.rb b/spec/config/initializers/ab_tests_spec.rb
index b6313e51bd6..f858344346d 100644
--- a/spec/config/initializers/ab_tests_spec.rb
+++ b/spec/config/initializers/ab_tests_spec.rb
@@ -3,13 +3,7 @@
 RSpec.describe AbTests do
   describe '#all' do
     it 'returns all registered A/B tests' do
-      expect(AbTests.all).to match(
-        {
-          ACUANT_SDK: an_instance_of(AbTest),
-          DOC_AUTH_VENDOR: an_instance_of(AbTest),
-
-        },
-      )
+      expect(AbTests.all.values).to all(be_kind_of(AbTest))
     end
   end
 
@@ -119,20 +113,20 @@
 
     let(:enable_ab_test) do
       -> {
-        allow(IdentityConfig.store).to receive(:doc_auth_vendor).
+        allow(IdentityConfig.store).to receive(:doc_auth_vendor_default).
           and_return('vendor_a')
-        allow(IdentityConfig.store).to receive(:doc_auth_vendor_randomize).
+        allow(IdentityConfig.store).to receive(:doc_auth_vendor_switching_enabled).
           and_return(true)
-        allow(IdentityConfig.store).to receive(:doc_auth_vendor_randomize_alternate_vendor).
-          and_return('vendor_b')
-        allow(IdentityConfig.store).to receive(:doc_auth_vendor_randomize_percent).
+        allow(IdentityConfig.store).to receive(:doc_auth_vendor_socure_percent).
           and_return(50)
+        allow(IdentityConfig.store).to receive(:doc_auth_vendor_lexis_nexis_percent).
+          and_return(30)
       }
     end
 
     let(:disable_ab_test) do
       -> {
-        allow(IdentityConfig.store).to receive(:doc_auth_vendor_randomize).
+        allow(IdentityConfig.store).to receive(:doc_auth_vendor_switching_enabled).
           and_return(false)
       }
     end
diff --git a/spec/services/doc_auth_router_spec.rb b/spec/services/doc_auth_router_spec.rb
index 76ecdf41e40..6e4cc22a49f 100644
--- a/spec/services/doc_auth_router_spec.rb
+++ b/spec/services/doc_auth_router_spec.rb
@@ -19,44 +19,6 @@
     end
   end
 
-  describe '.doc_auth_vendor' do
-    def reload_ab_test_initializer!
-      # undefine the AB tests instances so we can re-initialize them with different config values
-      AbTests.constants.each do |const_name|
-        AbTests.class_eval { remove_const(const_name) }
-      end
-      load Rails.root.join('config', 'initializers', 'ab_tests.rb').to_s
-    end
-
-    let(:doc_auth_vendor) { 'test1' }
-    let(:doc_auth_vendor_randomize_alternate_vendor) { 'test2' }
-    let(:analytics) { FakeAnalytics.new }
-    let(:doc_auth_vendor_randomize_percent) { 57 }
-    let(:doc_auth_vendor_randomize) { true }
-
-    before do
-      allow(IdentityConfig.store).to receive(:doc_auth_vendor).and_return(doc_auth_vendor)
-      allow(IdentityConfig.store).to receive(:doc_auth_vendor_randomize_alternate_vendor).
-        and_return(doc_auth_vendor_randomize_alternate_vendor)
-
-      allow(IdentityConfig.store).to receive(:doc_auth_vendor_randomize_percent).
-        and_return(doc_auth_vendor_randomize_percent)
-      allow(IdentityConfig.store).to receive(:doc_auth_vendor_randomize).
-        and_return(doc_auth_vendor_randomize)
-
-      reload_ab_test_initializer!
-    end
-
-    after do
-      allow(IdentityConfig.store).to receive(:doc_auth_vendor_randomize_percent).
-        and_call_original
-      allow(IdentityConfig.store).to receive(:doc_auth_vendor_randomize).
-        and_call_original
-
-      reload_ab_test_initializer!
-    end
-  end
-
   describe DocAuthRouter::DocAuthErrorTranslatorProxy do
     subject(:proxy) do
       DocAuthRouter::DocAuthErrorTranslatorProxy.new(DocAuth::Mock::DocAuthMockClient.new)
diff --git a/spec/services/idv/proofing_components_spec.rb b/spec/services/idv/proofing_components_spec.rb
index d78fb48b1fc..97e78cc5ab6 100644
--- a/spec/services/idv/proofing_components_spec.rb
+++ b/spec/services/idv/proofing_components_spec.rb
@@ -32,7 +32,7 @@
     let(:pii_from_doc) { Idp::Constants::MOCK_IDV_APPLICANT }
 
     before do
-      allow(IdentityConfig.store).to receive(:doc_auth_vendor).and_return('test_vendor')
+      allow(IdentityConfig.store).to receive(:doc_auth_vendor_default).and_return('test_vendor')
       idv_session.mark_verify_info_step_complete!
       idv_session.address_verification_mechanism = 'gpo'
       allow(FeatureManagement).to receive(:proofing_device_profiling_collecting_enabled?).
@@ -78,7 +78,7 @@
 
     context 'doc auth' do
       before do
-        allow(IdentityConfig.store).to receive(:doc_auth_vendor).and_return('test_vendor')
+        allow(IdentityConfig.store).to receive(:doc_auth_vendor_default).and_return('test_vendor')
       end
       context 'before doc auth complete' do
         it 'returns nil' do