Obviously I'm biased so I think Optery is better, but here are two un-biased reviews written by the lead analyst for security at PCMag.com:

https://www.pcmag.com/reviews/optery

https://www.pcmag.com/reviews/the-kanary

Here's another well-researched and unbiased review:

https://blog.infostruction.com/2023/08/12/privacy-powerhouse...