Preheat oven to 350°F (175°C). Line a loaf pan with parchment paper or lightly grease it.
In a mixing bowl, combine almond flour, coconut flour, baking soda, cinnamon, and salt.
In another bowl, whisk together eggs, melted coconut oil, maple syrup, and vanilla extract.
Add the wet ingredients to the dry and stir until just combined.
Fold in the grated zucchini. Do not overmix.
Pour the batter into the prepared loaf pan and smooth the top.
Bake for 40–45 minutes, or until a toothpick comes out clean.
Let cool in the pan for 15 minutes, then transfer to a wire rack to cool completely.