It does not matter how big your company is or how good the SEO team; we all have to operate by the same rules. Therefore it is possible, using simple Search Engine Optimization techniques, match and sometimes beat the competition, with no budget.
4 Tips to improve SEO with no budget, and free testing tools :
Speed is everything
Make sure your Website Hosting provider can deliver your website content fast, and then make sure your website is light. You want your website to load in 3 seconds or less. : https://testmysite.withgoogle.com
Your website has to be 100% mobile compatible. It’s just that simple. :https://search.google.com/test/mobile-friendly
Make sure you have your Using Schema Markup setup.
Schema Markup is a form of coded information that speaks to the search engines directly giving them critical information about your business, location and contact information; it’s like a bar code for your website that Google can quickly scan. Having an up to date and accurate Schema can make a big difference to your Google rankings: https://search.google.com/structured-data/testing-tool
Google My Business.
Spending some time registering your business on Google My Business. this will significantly boost your Local SEO. : https://business.google.com