Based on your question, I found EmbedMyReviews by searching YouTube for "EmbedMyReview Tutorial". I came across an interview featuring Albert Tan and the Founder/Lead Software Engineer Mannie Gill. In the presentation, the subject of Climbo came up as a comparison about midway through and near the end. According to Mannie Gill, Climbo was first. As a SaaS programmer, Mannie studied multiple platforms available at that time in an attempt to enhance them with his own innovations. Using that research as a foundation, he designed EmbedMyReviews to prioritize being an Agency Platform from the start, rather than simply adding agency features to an existing platform. According to him, this allows for faster and more stable development as the platform moves forward.

Additionally, Mannie states that he has a better plan for long term viability because of the following reasons:
- He has no intentions to keep promoting a lifetime deal (even though the deal is still active - if you can find it in the video description).
- He is selling EmbedMyReviews directly to the public, to build MRR (When you go to EmbedMyReviews dot com you will find their public sales site not a sales pitch to agencies like Climbo).
- EmbedMyReviews white label is unlimited but has a "Bring Your Own" approach to keep costs generated by Agencies low. That means you have to provide your OWN Email Provider API, Your OWN ChatGPT API, and your OWN Twilio/SMS API. (Since the making of that video, agencies can now buy credits through EmbedMy Reviews to avoid setting up their own API keys. However, using your own API keys is more cost-effective.)

This is what I also found:
- EmbedMyReviews does not have multiple levels of white label partners; you get all the white label features including white label and automations if you are a white label agency partner.
- EmbedMyReviews is $749 for their unlimited lifetime deal, which to me is a lot more reasonable than $3000 for Climbo. And the "Bring Your Own" approach seems acceptable for the long-term viability of the site.
- EmbedMyReviews also has sales academy training and marketing tools available directly through your backend for its Agencies (though quite a few training categories are currently incomplete). Climbo also has sales training, but you have to go off-site to find it.
- Based on change logs, EmbedMyReviews, seems to be frequently updated.
- EmbedMyReviews custom plans are more customizeable than Climbo's custom plans
- EmbedMyReviews allows you to sell custom products too (like top-off credits for SMS, EMAIL, and AI tokens)
- EmbedMyReviews has more review display options and more advanced email template builder
- Climbo is simpler and quicker to setup because it has less options and everything is included.
- Climbo's UI is easier on my eyes because of its bold fonts and higher contrast color scheme to highlight the important parts.

As far as reviews go:
Both operate pretty much the same except Climbo uses a split form with a picture on the side, whereas EmbedMyReviews uses a more traditional looking form.

In conclusion:
You can make money with both of them. Your initial time investment will be higher with EmbedMyReviews, but the system will be more customized to your business. Your initial monetary investment will be higher with Climbo, but you can get started faster.