BlogToPod is a simple service that lets you convert blog posts into podcasts with a few clicks. You paste your blog post, choose your preferred voice style, and then publish your podcast to distribution channels. The service charges by the minute, but you can pay for a monthly subscription that's suitable for bloggers who want to try out podcasting without a big upfront cost.
Another good option is Adauris, which has a lot of features for turning written content into an audio package. With more than 50 premium voices, customizable audio players and distribution to Spotify, YouTube and other major channels, Adauris is good for turning blog posts and other written content into podcasts. It also offers analytics to track how people are listening, so it's a good option for content marketers and teams trying to reach a broader audience.