diff --git a/.github/workflows/functional-test.yml b/.github/workflows/functional-test.yml
new file mode 100644
index 00000000..027f3c7e
--- /dev/null
+++ b/.github/workflows/functional-test.yml
@@ -0,0 +1,25 @@
+name: 🧪 Functional Test
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+
+jobs:  
+  functional:
+    name: Functional Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.17
+
+      - name: Check out code
+        uses: actions/checkout@v2
+
+      - name: Functional Tests
+        run: |
+          chmod +x run.sh
+          bash run.sh
+        working-directory: cmd/functional-test
diff --git a/.gitignore b/.gitignore
index 3b6ed0bc..2390b4e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,9 @@
 
 cmd/httpx/httpx
 integration_tests/httpx
-integration_tests/integration-test
\ No newline at end of file
+integration_tests/integration-test
+cmd/functional-test/httpx_dev
+cmd/functional-test/functional-test
+cmd/functional-test/httpx
+cmd/functional-test/*.cfg
+
diff --git a/cmd/functional-test/main.go b/cmd/functional-test/main.go
new file mode 100644
index 00000000..52a3db30
--- /dev/null
+++ b/cmd/functional-test/main.go
@@ -0,0 +1,83 @@
+package main
+
+import (
+	"bufio"
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/logrusorgru/aurora"
+	"github.com/pkg/errors"
+
+	"github.com/projectdiscovery/httpx/internal/testutils"
+)
+
+var (
+	debug   = os.Getenv("DEBUG") == "true"
+	success = aurora.Green("[✓]").String()
+	failed  = aurora.Red("[✘]").String()
+	errored = false
+
+	mainHttpxBinary = flag.String("main", "", "Main Branch Httpx Binary")
+	devHttpxBinary  = flag.String("dev", "", "Dev Branch Httpx Binary")
+	testcases      = flag.String("testcases", "", "Test cases file for Httpx functional tests")
+)
+
+func main() {
+	flag.Parse()
+
+	if err := runFunctionalTests(); err != nil {
+		log.Fatalf("Could not run functional tests: %s\n", err)
+	}
+	if errored {
+		os.Exit(1)
+	}
+}
+
+func runFunctionalTests() error {
+	file, err := os.Open(*testcases)
+	if err != nil {
+		return errors.Wrap(err, "could not open test cases")
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		text := strings.TrimSpace(scanner.Text())
+		if text == "" {
+			continue
+		}
+		if err := runIndividualTestCase(text); err != nil {
+			errored = true
+			fmt.Fprintf(os.Stderr, "%s Test \"%s\" failed: %s\n", failed, text, err)
+		} else {
+			fmt.Printf("%s Test \"%s\" passed!\n", success, text)
+		}
+	}
+	return nil
+}
+
+func runIndividualTestCase(testcase string) error {
+	parts := strings.Fields(testcase)
+
+	var finalArgs []string
+	var target string
+	if len(parts) > 1 {
+		finalArgs = parts[2:]
+		target = parts[0]
+	}
+	mainOutput, err := testutils.RunHttpxBinaryAndGetResults(target, *mainHttpxBinary, debug, finalArgs)
+	if err != nil {
+		return errors.Wrap(err, "could not run httpx main test")
+	}
+	devOutput, err := testutils.RunHttpxBinaryAndGetResults(target, *devHttpxBinary, debug, finalArgs)
+	if err != nil {
+		return errors.Wrap(err, "could not run httpx dev test")
+	}
+	if len(mainOutput) == len(devOutput) {
+		return nil
+	}
+	return fmt.Errorf("%s main is not equal to %s dev", mainOutput, devOutput)
+}
diff --git a/cmd/functional-test/run.sh b/cmd/functional-test/run.sh
new file mode 100755
index 00000000..be5e8c7a
--- /dev/null
+++ b/cmd/functional-test/run.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+echo 'Building functional-test binary'
+go build
+
+echo 'Building HTTPX binary from current branch'
+go build -o httpx_dev ../httpx
+
+echo 'Installing latest release of HTTPX'
+GO111MODULE=on go build -v github.com/projectdiscovery/httpx/cmd/httpx
+
+echo 'Starting HTTPX functional test'
+./functional-test -main ./httpx -dev ./httpx_dev -testcases testcases.txt
diff --git a/cmd/functional-test/test-data/raw-request.txt b/cmd/functional-test/test-data/raw-request.txt
new file mode 100644
index 00000000..94b072c0
--- /dev/null
+++ b/cmd/functional-test/test-data/raw-request.txt
@@ -0,0 +1 @@
+GET /search?q=test HTTP/2
diff --git a/cmd/functional-test/test-data/request.txt b/cmd/functional-test/test-data/request.txt
new file mode 100644
index 00000000..284d3f2c
--- /dev/null
+++ b/cmd/functional-test/test-data/request.txt
@@ -0,0 +1 @@
+https://www.example.com
diff --git a/cmd/functional-test/testcases.txt b/cmd/functional-test/testcases.txt
new file mode 100644
index 00000000..e95bdc3a
--- /dev/null
+++ b/cmd/functional-test/testcases.txt
@@ -0,0 +1,16 @@
+www.example.com {{binary}} -silent 
+www.example.com {{binary}} -silent -l test-data/request.txt
+www.example.com {{binary}} -silent -request test-data/raw-request.txt
+www.example.com {{binary}} -silent -title
+www.example.com {{binary}} -silent -sc
+www.example.com {{binary}} -silent -td
+www.example.com {{binary}} -silent -probe
+www.example.com {{binary}} -silent -no-fallback
+www.example.com {{binary}} -silent -cl
+www.example.com {{binary}} -silent -server
+www.example.com {{binary}} -silent -ip
+www.example.com {{binary}} -silent -tls-grab
+www.example.com {{binary}} -silent -unsafe
+www.example.com {{binary}} -silent -x all
+www.example.com {{binary}} -silent -body 'a=b'
+www.example.com {{binary}} -silent -exclude-cdn
diff --git a/internal/testutils/integration.go b/internal/testutils/integration.go
index 6f7b28b0..d058952d 100644
--- a/internal/testutils/integration.go
+++ b/internal/testutils/integration.go
@@ -4,6 +4,7 @@ import (
 	"os"
 	"os/exec"
 	"strings"
+	"fmt"
 )
 
 // RunNucleiAndGetResults returns a list of results for a template
@@ -33,6 +34,31 @@ func RunHttpxAndGetResults(url string, debug bool, extra ...string) ([]string, e
 	}
 	return parts, nil
 }
+func RunHttpxBinaryAndGetResults(target string, httpxBinary string, debug bool, args []string) ([]string, error) {
+	cmd := exec.Command("bash", "-c")
+	cmdLine := fmt.Sprintf(`echo %s | %s `, target, httpxBinary)
+	cmdLine += strings.Join(args, " ")
+	if debug {
+		cmdLine += " -debug"
+		cmd.Stderr = os.Stderr
+	} else {
+		cmdLine += " -silent"
+	}
+
+	cmd.Args = append(cmd.Args, cmdLine)
+	data, err := cmd.Output()
+	if err != nil {
+		return nil, err
+	}
+	parts := []string{}
+	items := strings.Split(string(data), "\n")
+	for _, i := range items {
+		if i != "" {
+			parts = append(parts, i)
+		}
+	}
+	return parts,nil
+}
 
 // TestCase is a single integration test case
 type TestCase interface {