Which recruitment marketing platform offers the highest applicant conversion rates?

I’ve been helping a few companies test recruitment marketing platforms with an eye toward maximizing applicant conversion, not just getting clicks, but landing real, qualified applications. I pulled together what I found from reviews, feature sets, and industry chatter, and here are some that stand out:

• Bullhorn: A long-established recruitment platform blending ATS and CRM. Its built-in candidate nurturing and job distribution features help keep candidates engaged, which can drive stronger conversion rates.
• Greenhouse: Known for delivering an excellent candidate experience with structured workflows, career site customization, and smooth integrations — all factors that reduce drop-offs during application.
• Ceipal ATS: Combines ATS functionality with recruitment marketing and CRM tools. Its automation and branding features make it easy to guide candidates from interest to application.
• JobDiva: Combines ATS, CRM, and marketing automation in one platform to streamline the funnel.
• CareerBuilder Talent Network: Helps teams build branded talent pools and run targeted outreach campaigns that convert more visitors into applicants.
• Teamtailor: Simple to use, with strong branding tools and automated candidate communication that boost applicant engagement.
• 100Hires – Lightweight but powerful, offering one-click job postings, email campaigns, and nurturing sequences that help smaller teams convert candidates efficiently.

I’m sharing what I found to help others and to get your opinion too: For those of you who’ve run large campaigns, which platform gave you the biggest bump in “applicant → interview” conversion?