Yes, both Mailr and ContentIn offer a Free Trial.
Pricing for Mailr Starts at $4.99/month whereas for ContentIn Starts at $15.85/month.
Mailr offers several advantages, including Google Chrome extension, Writes & replies to emails, User-controlled email intention, 10+ custom tones selection, Individuals & businesses friendly and many more functionalities.
The cons of Mailr may include a Only for Google Chrome, Requires account authentication, Not multi-language, Platform specificity. and Doesn't support all email platforms
ContentIn offers several advantages, including Specifically designed for LinkedIn, Content creation platform, Promotes quick content creation, Assists in personal branding, Offering both free and paid plans and many more functionalities.
The cons of ContentIn may include a Limited to LinkedIn content, No video or slideshow support, Limited free plan, No multi-account support. and No automatic multi-language translation