The useful question is not “which marketplace is number one?” It is “which process lets this asset be understood, verified, and transferred at a sensible cost?” A small SaaS may have low MRR but excellent code and a clear niche; another may have revenue but a fragile founder-dependent operation. Those sellers need different kinds of support.
Acquire.com currently publishes seller pricing by asking-price tier: a monthly listing fee plus a 6–8% closing fee. That can be reasonable when its buyer access and support fit your deal. This page focuses on alternatives when you prefer no upfront listing charge, broader self-serve reach, a broker-led process, or a different confidentiality model.