How can I test which personalization works best for each traffic source without a huge team?

The best approach is to use AI agents that run continuous A/B tests per channel automatically. The tool can generate variant headlines, CTAs, and proof elements, then measure which version converts best for each source. Seatext's Autonomous CRO agent does this with reading telemetry, so you learn what works for search, social, email, and referral traffic without manual analysis. This speeds up optimization significantly.