As i am writing this post, there are many outstanding web scraping software have been released in the market and also one major exit from the market called as Kimono.

Still i will pitch for Web Scraping Service over Web Scraping Software because of the following reasons :

Web Scraping Software :

Pros :

1. One time fee payment and life time usage.

2. Consists of Built-in Rich Features required for web scraping process.

3. Can Scrape simple website in fraction of time.

4. Some Software can also extract data from PDF file.

5. You can read online reviews before buying software.

6. Variety of software available for specific need like email extraction

Cons :

1. Limited scope of customization.

2. Cannot scrape complex websites.

3. Most of the web scraping software can only run on windows operating system.

4. High Price.

5. User must have knowledge of things required for web scraping process like xpath, regex, etc.

Web Scraping Service :

Pros :

1. Expertise in web scraping so you get data from any damn website.

2. Can deliver required script or software to run at your own machine.

3. No need to purchase any resources required for web scraping purpose.

4. Above all "Quality data is guaranteed".

Cons :

1. High Price. This is the only disadvantage i see with web scraping service.

So, now it is up to individual what to choose. I will go for web scraping service simply because it delivers quality data in less time.