Pre-built data is the whole collection of unstructured B2B data which may not provide the relevant leads. If also it is there in the B2B database it might take time to narrow down to that lead as it is amassed in the bulk collection of the B2B data, which is time consuming for the sales representative. It is mostly delivered within 24 hours. Custom B2B database is segmented and compiled as per the business needs of the customers so that it becomes easier for the sales team to get the relevant leads at one shot and saves their time. The availability of B2B custom data at an unbelievable quality level, makes it a little expensive than pre-built one which is available at a reasonable market price. It also takes time to clean up the B2B data to provide the suitable one to you, which is around 3-5 days. To get clear information on the price range and duration, just send us an email at: sales@infoclutch.com