Let us take a quick look and comparison between the various courier companies located in Singapore.
First of all, there would be the private and local Singapore courier companies. Examples of such courier companies in Singapore would include PCA Masters Pte Ltd as well as Ixpress647, Network Courier e.t.c. These are owned by local businessman and are very flexible when it comes to their service levels depending on what you require. In other words, they provide normal courier services just like any other companies in Singapore, but they also provide custom pricing and packages for companies which require it.
Next of all, there would be the international couriers such as Fedex, DHL, UPS, e.t.c. These are large international courier companies. Although most of these companies offer competitive rates in Singapore as well, their real specialty is in international freight. When it comes to local delivery services in Singapore, I would still highly recommend you look at local courier companies instead of such international ones.
Last but not least, there is the state owned Speedpost (a subsidiary of SingPost). Speedpost is not actually the cheapest nor the most efficient courier company in Singapore, in direct contrary to what some people think. Speedpost has 2 main levels of services, one which is their express level of courier service where they get your items delivered in 2 hours or less in Singapore, while the other one is the delivery service where they will deliver your item(s) within 1 to 2 days of collection. Obviously the express courier service would cost a lot more than the normal delivery services.
I would recommend you check out the rates of both the local courier companies and Speedpost before you make a prudent decision choice for yourself and / or your business – depending on which you require delivery services for.