diff --git a/Gemfile b/Gemfile
index bc0c0a1..42a89a9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,3 +8,4 @@ gem 'haml'
 gem 'slim'
 gem 'liquid'
 gem 'mustache'
+gem 'markaby'
diff --git a/Gemfile.lock b/Gemfile.lock
index 4a4d64a..14f21fa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,6 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    builder (3.2.2)
     erubis (2.7.0)
     faker (1.2.0)
       i18n (~> 0.5)
@@ -8,6 +9,8 @@ GEM
       tilt
     i18n (0.6.9)
     liquid (2.6.0)
+    markaby (0.7.2)
+      builder (>= 2.0.0)
     mustache (0.99.5)
     slim (2.0.2)
       temple (~> 0.6.6)
@@ -23,6 +26,7 @@ DEPENDENCIES
   faker
   haml
   liquid
+  markaby
   mustache
   slim
   tilt
diff --git a/README.md b/README.md
index 6468ee3..98ffffd 100644
--- a/README.md
+++ b/README.md
@@ -2,13 +2,17 @@
 #### Ruby implementations.
 
 ## Competitors
+- Builder
 - ERB
 - Erubis
 - Haml
 - Liquid
+- Markaby
 - Mustache
 - Slim
+
 ... and our special guest ...
+
 - String interpolation
 
 ## Running
@@ -33,47 +37,55 @@ bundle install
 ##            Compilation (small) (1000 runs)             ##
 ############################################################
                      user     system      total        real
-string           0.040000   0.020000   0.060000 (  0.053855)
-erubis           0.060000   0.010000   0.070000 (  0.075751)
-erb              0.240000   0.030000   0.270000 (  0.262077)
-haml             0.840000   0.020000   0.860000 (  0.865688)
-slim             1.930000   0.040000   1.970000 (  1.968993)
-mustache         0.020000   0.010000   0.030000 (  0.030289)
-liquid           0.080000   0.020000   0.100000 (  0.104174)
+string           0.030000   0.020000   0.050000 (  0.046353)
+erubis           0.060000   0.020000   0.080000 (  0.079977)
+erb              0.260000   0.020000   0.280000 (  0.273492)
+haml             0.850000   0.020000   0.870000 (  0.874163)
+slim             1.970000   0.040000   2.010000 (  2.003406)
+mustache         0.020000   0.010000   0.030000 (  0.034893)
+liquid           0.050000   0.020000   0.070000 (  0.074104)
+markaby          0.030000   0.020000   0.050000 (  0.039915)
+builder          0.020000   0.010000   0.030000 (  0.039993)
 
 ############################################################
 ##               Render (small) (1000 runs)               ##
 ############################################################
                      user     system      total        real
-string           0.010000   0.000000   0.010000 (  0.007824)
-erubis           0.010000   0.000000   0.010000 (  0.008019)
-erb              0.010000   0.000000   0.010000 (  0.010448)
-haml             0.020000   0.000000   0.020000 (  0.019507)
-slim             0.020000   0.000000   0.020000 (  0.019644)
-mustache         0.230000   0.000000   0.230000 (  0.232938)
-liquid           0.040000   0.000000   0.040000 (  0.044189)
+string           0.010000   0.000000   0.010000 (  0.009001)
+erubis           0.010000   0.000000   0.010000 (  0.008587)
+erb              0.010000   0.000000   0.010000 (  0.012027)
+haml             0.020000   0.010000   0.030000 (  0.022236)
+slim             0.020000   0.000000   0.020000 (  0.021628)
+mustache         0.250000   0.000000   0.250000 (  0.257850)
+liquid           0.050000   0.000000   0.050000 (  0.045442)
+markaby          0.230000   0.000000   0.230000 (  0.232095)
+builder          0.200000   0.000000   0.200000 (  0.196965)
 
 ############################################################
 ##             Compilation (big) (1000 runs)              ##
 ############################################################
                      user     system      total        real
-string           0.030000   0.020000   0.050000 (  0.044706)
-erubis           0.140000   0.020000   0.160000 (  0.161244)
-erb              0.320000   0.030000   0.350000 (  0.341144)
-haml             1.180000   0.020000   1.200000 (  1.205595)
-slim             2.410000   0.040000   2.450000 (  2.449355)
-mustache         0.020000   0.010000   0.030000 (  0.028152)
-liquid           0.110000   0.020000   0.130000 (  0.133382)
+string           0.030000   0.020000   0.050000 (  0.043935)
+erubis           0.150000   0.020000   0.170000 (  0.176325)
+erb              0.310000   0.020000   0.330000 (  0.325486)
+haml             1.190000   0.030000   1.220000 (  1.217889)
+slim             2.430000   0.030000   2.460000 (  2.468188)
+mustache         0.020000   0.020000   0.040000 (  0.031460)
+liquid           0.110000   0.020000   0.130000 (  0.134760)
+markaby          0.030000   0.010000   0.040000 (  0.039455)
+builder          0.020000   0.020000   0.040000 (  0.040826)
 
 ############################################################
 ##                Render (big) (100 runs)                 ##
 ############################################################
                      user     system      total        real
-string           0.390000   0.020000   0.410000 (  0.408272)
-erubis           0.440000   0.020000   0.460000 (  0.457214)
-erb              0.640000   0.020000   0.660000 (  0.656181)
-haml             0.940000   0.020000   0.960000 (  0.965373)
-slim             1.390000   0.000000   1.390000 (  1.395409)
-mustache         3.770000   0.010000   3.780000 (  3.778392)
-liquid          10.460000   0.050000  10.510000 ( 10.507224)
+string           0.370000   0.020000   0.390000 (  0.392442)
+erubis           0.450000   0.020000   0.470000 (  0.463274)
+erb              0.630000   0.020000   0.650000 (  0.651563)
+haml             0.970000   0.010000   0.980000 (  0.982174)
+slim             1.410000   0.010000   1.420000 (  1.422800)
+mustache         3.760000   0.000000   3.760000 (  3.757236)
+liquid          10.440000   0.040000  10.480000 ( 10.480874)
+markaby         11.560000   0.020000  11.580000 ( 11.576669)
+builder         18.300000   0.030000  18.330000 ( 18.326396)
 ```
diff --git a/benchmark.rb b/benchmark.rb
index c6477f7..8711359 100755
--- a/benchmark.rb
+++ b/benchmark.rb
@@ -31,7 +31,7 @@ unless File.exist?(big_data_file)
   raise 'Big data file not found. Please generate it with "./fakedata.rb 10000 > data/big.yml"'
 end
 
-small_data = {title: 'Greetings!', username: '%username%'}
+small_data = {window_title: 'Greetings!', username: '%username%'}
 big_data = YAML.load_file(big_data_file)
 
 def banner title
@@ -97,6 +97,14 @@ ENGINES = {
     class: Tilt::LiquidTemplate,
     extension: 'liquid'
   },
+  markaby: {
+    class: Tilt::MarkabyTemplate,
+    extension: 'mab'
+  },
+  builder: {
+    class: Tilt::BuilderTemplate,
+    extension: 'builder'
+  },
 }
 
 banner 'Compilation (small) (%d runs)' % COMPILE_LOOPS
diff --git a/templates/builder/big.builder b/templates/builder/big.builder
new file mode 100644
index 0000000..c6d909a
--- /dev/null
+++ b/templates/builder/big.builder
@@ -0,0 +1,27 @@
+xml.html do
+  xml.head do
+    xml.title 'Customers List'
+  end
+  xml.body do
+    customers.each do |customer|
+      xml.dl do
+        xml.dt 'Name:'
+        xml.dd customer['name']
+        xml.dt 'Age:'
+        xml.dd customer['age']
+        xml.dt 'Address:'
+        xml.dd do
+          [
+            customer['zip'],
+            customer['country'],
+            customer['city'],
+            customer['address']
+          ].join("\n")
+        end
+        xml.dt 'Employer:'
+        xml.dd customer['employer']
+      end
+    end
+  end
+end
+
diff --git a/templates/builder/small.builder b/templates/builder/small.builder
new file mode 100644
index 0000000..ddf463c
--- /dev/null
+++ b/templates/builder/small.builder
@@ -0,0 +1,19 @@
+xml.html do
+  xml.head do
+    xml.title window_title
+  end
+  xml.body do
+    xml.h1 "Hello, #{username}!"
+    xml.p do
+      <<-END
+      Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
+      tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
+      veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
+      commodo consequat. Duis aute irure dolor in reprehenderit in voluptate
+      velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint
+      occaecat cupidatat non proident, sunt in culpa qui officia deserunt
+      mollit anim id est laborum.
+      END
+    end
+  end
+end
diff --git a/templates/erb/small.erb b/templates/erb/small.erb
index 31abbbd..cac3e38 100644
--- a/templates/erb/small.erb
+++ b/templates/erb/small.erb
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
 <head>
-  <title><%= title %></title>
+  <title><%= window_title %></title>
 </head>
 <body>
   <h1>Hello, <%= username %>!</h1>
diff --git a/templates/erubis/small.erubis b/templates/erubis/small.erubis
index 31abbbd..cac3e38 100644
--- a/templates/erubis/small.erubis
+++ b/templates/erubis/small.erubis
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
 <head>
-  <title><%= title %></title>
+  <title><%= window_title %></title>
 </head>
 <body>
   <h1>Hello, <%= username %>!</h1>
diff --git a/templates/haml/small.haml b/templates/haml/small.haml
index b4f160b..290d79c 100644
--- a/templates/haml/small.haml
+++ b/templates/haml/small.haml
@@ -1,7 +1,7 @@
 !!!
 %html
   %head
-    %title= title
+    %title= window_title
   %body
     %h1
       Hello,
diff --git a/templates/liquid/small.liquid b/templates/liquid/small.liquid
index e2dc06e..5ef3f30 100644
--- a/templates/liquid/small.liquid
+++ b/templates/liquid/small.liquid
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
 <head>
-  <title>{{ title }}</title>
+  <title>{{ window_title }}</title>
 </head>
 <body>
   <h1>Hello, {{ username }}!</h1>
diff --git a/templates/markaby/big.mab b/templates/markaby/big.mab
new file mode 100644
index 0000000..9b4224e
--- /dev/null
+++ b/templates/markaby/big.mab
@@ -0,0 +1,26 @@
+html do
+  head do
+    title 'Customers List'
+  end
+  body do
+    customers.each do |customer|
+      dl do
+        dt 'Name:'
+        dd customer['name']
+        dt 'Age:'
+        dd customer['age']
+        dt 'Address:'
+        dd do
+          [
+            customer['zip'],
+            customer['country'],
+            customer['city'],
+            customer['address']
+          ].join("\n")
+        end
+        dt 'Employer:'
+        dd customer['employer']
+      end
+    end
+  end
+end
diff --git a/templates/markaby/small.mab b/templates/markaby/small.mab
new file mode 100644
index 0000000..c446d9c
--- /dev/null
+++ b/templates/markaby/small.mab
@@ -0,0 +1,19 @@
+html do
+  head do
+    title window_title
+  end
+  body do
+    h1 "Hello, #{username}!"
+    p do
+      <<-END
+      Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
+      tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
+      veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
+      commodo consequat. Duis aute irure dolor in reprehenderit in voluptate
+      velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint
+      occaecat cupidatat non proident, sunt in culpa qui officia deserunt
+      mollit anim id est laborum.
+      END
+    end
+  end
+end
diff --git a/templates/mustache/small.mustache b/templates/mustache/small.mustache
index e2dc06e..5ef3f30 100644
--- a/templates/mustache/small.mustache
+++ b/templates/mustache/small.mustache
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
 <head>
-  <title>{{ title }}</title>
+  <title>{{ window_title }}</title>
 </head>
 <body>
   <h1>Hello, {{ username }}!</h1>
diff --git a/templates/slim/small.slim b/templates/slim/small.slim
index 8b785f1..a9bc0bc 100644
--- a/templates/slim/small.slim
+++ b/templates/slim/small.slim
@@ -1,7 +1,7 @@
 doctype html
 html
   head
-    title = title
+    title = window_title
   body
     h1 Hello, #{username}!
     p
diff --git a/templates/string/small.str b/templates/string/small.str
index 6196e30..b29c6b6 100644
--- a/templates/string/small.str
+++ b/templates/string/small.str
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
 <head>
-  <title>#{title}</title>
+  <title>#{window_title}</title>
 </head>
 <body>
   <h1>Hello, #{username}!</h1>