I can just agree with the above, check with the customer if they have preferences. I have a supplier that has 3 different Halal certifications, just because the auditing body has more recognition in different continents.
Also, there are different Halal standards as well, not all of them agree on the same things like alcohol usage (hand sanitisers etc.) machinery maintenance (Halal food safe lubricants to be used on machines etc.) and the slaughter and stun methods (principal 1,2,3), but the latter should not affect you if your product is not meat.
Auditing bodies normally list what standards they can certify for and this will be visible on the certification as well.
- Malaysia Halal Standard (MS 1500): Developed by JAKIM, this standard covers food production, preparation, handling, and storage, emphasizing hygiene and safety.
- Gulf Cooperation Council (GCC) Standard (GSO 2055-1:2015): This standard unifies Halal requirements across Gulf countries, focusing on food products.
- Indonesian Ulema Council (HAS) Standard (HAS 23000): Mandatory for all Halal-certified products in Indonesia, covering food, beverages, cosmetics, and pharmaceuticals.
- OIC/SMIIC 1:2019 (OIC): Developed by the Standards and Metrology Institute for Islamic Countries, this standard aims to harmonize Halal certification across OIC member countries.
- Singapore Halal Standard (MUIS): Managed by the Islamic Religious Council of Singapore, this standard ensures compliance with Islamic dietary laws for food and non-food products.
I only have experience with MS1500:2019 that only focuses on food.
I think certification should be an easy process for you no matter which auditing body you are going with. Prices can be affected by recognition as well, the more "popular" and known an auditing body is, the more expensive it will be. You are paying for this recognition as well, by being able to use their logo on your product. Also, there are different packages, which can include trainings, consultation etc..