Yes! You may send money to anyone with a mobile number or email address. They don't need to have a Coins.ph account yet.
Your recipient just needs to sign up with that mobile number or email address to claim the funds. If your recipient doesn't sign up within 5 days, you will receive the funds back in your wallet.
Note: Transfers are generally final and irreversible. Please make sure the number or email address you input are correct for your recipient to be able to receive the funds.