In my experience, it really depends on where you are in the growth cycle.
If you already have a strong list and engaged audience, email marketing usually delivers faster ROI because you’re speaking to people who already know you. It’s great for nurturing, reactivating interest, and moving prospects toward a decision.
SEO, on the other hand, tends to be more of a long-term acquisition engine. Once the right pages start ranking, it can bring in consistent traffic and new prospects without ongoing ad spend.
In fields like lead gen for SaaS, consulting, or IT, the best results often come from combining both: SEO brings in new potential buyers, and email marketing helps nurture them until they’re ready to talk.
I’ve seen a similar philosophy from the team at Salesar, where the focus is on building structured systems that connect marketing and sales rather than relying on a single channel. They often emphasize quality conversations and alignment across the pipeline, which is what ultimately drives ROI regardless of the channel.
So rather than choosing one over the other, the real advantage usually comes from how well they work together.