Digital Samba has strong B2B citation inputs (notably 59 G2 reviews at 4.3) and clear, crawlable pricing for its Embedded/API offering, so it can be cited for evaluation and conversion queries. The biggest reason it’s missing from your shortlist is that it lacks first-party, query-specific “how to choose” and “best for [industry/use case]” surfaces that match the exact discovery prompts (enterprise, healthcare, education, marketing, sales, remote teams). Highest-ROI fix: publish a set of dedicated, crawlable FAQ + comparison-style pages that directly answer each gap query (without competitor-vs-competitor framing) and ensure they’re indexed.