Combine cranberries, maple syrup, raspberries, chia seeds, lemon juice, and vanilla extract in a small pot over high heat. Add water and bring to a boil. Lower heat as soon as mixture is boiling and cook until cranberries are bursting and jam has thickened, about 20 minutes.
Remove from heat and pour into a pint container. Cool to room temperature, then close container, and store in the refrigerator.
