diff --git a/src/Activation/ActivationFunc.cpp b/src/Activation/ActivationFunc.cpp
new file mode 100644
index 0000000..1001bf0
--- /dev/null
+++ b/src/Activation/ActivationFunc.cpp
@@ -0,0 +1,33 @@
+#include <cmath>
+#include <Layers/Layers.hpp>
+#include "Activation.hpp"
+#include <Eigen/Dense>
+
+class TanhActivation : public Activation {
+public:
+    TanhActivation() : Activation(tanh, tanh_prime) {}
+
+private:
+    static Eigen::VectorXd tanh(const Eigen::VectorXd& x) {
+        return x.array().tanh();
+    }
+
+    static Eigen::VectorXd tanh_prime(const Eigen::VectorXd& x) {
+        return 1 - x.array().tanh().square();
+    }
+};
+
+class SigmoidActivation : public Activation {
+public:
+    SigmoidActivation() : Activation(sigmoid, sigmoid_prime) {}
+
+private:
+    static Eigen::VectorXd sigmoid(const Eigen::VectorXd& x) {
+        return 1.0 / (1.0 + (-x.array()).exp());
+    }
+
+    static Eigen::VectorXd sigmoid_prime(const Eigen::VectorXd& x) {
+        Eigen::VectorXd s = sigmoid(x);
+        return s.array() * (1.0 - s.array());
+    }
+};
\ No newline at end of file