1) ConvertKit's forever free plan. Open an account and get started building your list. On the free plan you can build landing pages, and forms to start buliding your list whether you have a website or not. You can also send broadcast emails and provide freebies for everyone who signs up. The only limitations are that you won't be able to create funnels or sequences. If you're just starting out, ConvertKits free plan is a fantastic place to get started without having to commit any funds.
Learn more about ConvertKit's Forever Free Plan
2) I have a very good relationship with ConvertKit and as a result, they've provided me with the ability to grant a 30-day trial offer instead of the normal 14-day one you'll see publically. If you'd like to start your 30-day trial.
Start Your 30-Day ConvertKit Trial