Without any further description about what you're trying to do, it's difficult to answer the question.<p>There are millions of different ways:<p>You can do your landing pages in WP and easily integrate with newsletter pop-ups and all the other growth hack tricks.<p>If you have a SaaS you can run the whole subscription system (accounts, billing, renewals, etc.) using WooCommerce.<p>You can sell digital downloads of your software using WooCommerce.<p>You can keep your user-facing documentation in WP.<p>There are plugins for turning WordPress into a CRM so you can track your leads/sales.<p>etc.<p>The possibilities are literally limitless.
WordPress is a content management system. Content is where it shines. If your SaaS is mostly content presentation, WordPress will work just fine thanks to its wide array of plugins.<p>For my new book notification service app <a href="http://anynewbooks.com" rel="nofollow">http://anynewbooks.com</a>, I took a hybrid approach. The frontend is WordPress (in need of a makeover) while I wrote the backend in Rails since no plugin could replicate the functionalities I needed.<p>I took this approach because I wanted a proof of concept and threw it together in a matter of days. 7 years later is still standing. So I don't regret it and I think relying on WordPress is a valid option. Developers might frown upon your choice, but that should be the least of your concerns.<p>That said, when I finally manage to rewrite the app (I know, I know) I will likely go with an app from scratch (e.g., probably in something like Elixir/Phoenix or Clojure) in order to customize the app to my liking with no bloat from features I don't need.<p>Ultimately, you have this option too. You can start with WordPress, validate your idea, and if you run into limitations you can't live with, you can then switch to an app from scratch.
I've given a talk on using WordPress for rapidly developing SaaS app MVPs. You can watch it here:
<a href="https://wordpress.tv/2017/06/05/corey-maass-rapid-web-app-development-on-wordpress/" rel="nofollow">https://wordpress.tv/2017/06/05/corey-maass-rapid-web-app-de...</a><p>It's great for certain types of apps, and solves a lot of the first 90% of your app out of the box (user management, marketing pages, etc). So you can concentrate on solving the core problem your app is trying to solve. As mentioned in other comments, you might run into scaling issues over time, but that too depends on the app.<p>I've built a couple dozen apps on WordPress, some of them have grown beyond MVP and are going strong. Let me know if you have any specific questions.
Sorry, I should have been more specific. After some googling...SaaS + WordPress sounds interesting to me. So, I want to explore how SaaS startups can leverage this framework. Since wp is open source and startups have to operate on a shoe-string budget, it would be interesting to know how one can build a SaaS with WordPress. Are there any real-world, existing examples for this. Thanks.
I started <a href="http://www.apnijobs.pk" rel="nofollow">http://www.apnijobs.pk</a> on WordPress just to validate the idea and later move to custom code. 14 years down the line, it is still on WP :)