diff --git a/CHANGELOG.md b/CHANGELOG.md
index f77df6f58e8..83a7f159bc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
  * `ERC20Votes`: optimize by using unchecked arithmetic. ([#3748](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3748))
  * `Initializable`: optimize `_disableInitializers` by using `!=` instead of `<`. ([#3787](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3787))
  * `Math`: optimize `log256` rounding check. ([#3745](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3745))
+ * `Strings`: add `equal` method. ([#3774](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3774))
 
 ### Deprecations
 
diff --git a/contracts/mocks/StringsMock.sol b/contracts/mocks/StringsMock.sol
index 90a6c94b34b..81389fad4dc 100644
--- a/contracts/mocks/StringsMock.sol
+++ b/contracts/mocks/StringsMock.sol
@@ -20,4 +20,8 @@ contract StringsMock {
     function toHexString(address addr) public pure returns (string memory) {
         return Strings.toHexString(addr);
     }
+
+    function equal(string memory a, string memory b) public pure returns (bool) {
+        return Strings.equal(a, b);
+    }
 }
diff --git a/contracts/utils/Strings.sol b/contracts/utils/Strings.sol
index 76aa3640af3..e7597f12e74 100644
--- a/contracts/utils/Strings.sol
+++ b/contracts/utils/Strings.sol
@@ -67,4 +67,11 @@ library Strings {
     function toHexString(address addr) internal pure returns (string memory) {
         return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
     }
+
+    /**
+     * @dev Returns true if the two strings are equal.
+     */
+    function equal(string memory a, string memory b) internal pure returns (bool) {
+        return keccak256(bytes(a)) == keccak256(bytes(b));
+    }
 }
diff --git a/test/utils/Strings.test.js b/test/utils/Strings.test.js
index 7abc859ff3a..db9e254389a 100644
--- a/test/utils/Strings.test.js
+++ b/test/utils/Strings.test.js
@@ -83,4 +83,29 @@ contract('Strings', function (accounts) {
       expect(await this.strings.methods['toHexString(address)'](addr)).to.equal(addr);
     });
   });
+
+  describe('equal', function () {
+    it('compares two empty strings', async function () {
+      expect(await this.strings.methods['equal(string,string)']('', '')).to.equal(true);
+    });
+
+    it('compares two equal strings', async function () {
+      expect(await this.strings.methods['equal(string,string)']('a', 'a')).to.equal(true);
+    });
+
+    it('compares two different strings', async function () {
+      expect(await this.strings.methods['equal(string,string)']('a', 'b')).to.equal(false);
+    });
+
+    it('compares two different strings of different lengths', async function () {
+      expect(await this.strings.methods['equal(string,string)']('a', 'aa')).to.equal(false);
+      expect(await this.strings.methods['equal(string,string)']('aa', 'a')).to.equal(false);
+    });
+
+    it('compares two different strings of different (big) lengths', async function () {
+      const str1 = 'a'.repeat(201);
+      const str2 = 'a'.repeat(200) + 'b';
+      expect(await this.strings.methods['equal(string,string)'](str1, str2)).to.equal(false);
+    });
+  });
 });