SaaS.jobs might be a bit more popular than Hiring Club. We know about 1 link to it since March 2021 and only 1 link to Hiring Club. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Not an agency per se, but you should probably check out Weekday (https://weekday.works). They have a good database of folks that you can reach out to using their own platform (or they can do it for you). And they're cheap. 5 or 7% I think. Source: about 1 year ago
You can sign up here on the main page: https://saas.jobs/. Source: about 1 year ago
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