What are the most popular rerankers for RAG in 2026?

Top hosted choices are Cohere Rerank, Voyage AI rerankers, and Jina Reranker, which offer high quality with simple APIs and per-query pricing. Open-source leaders include the BGE reranker family from BAAI, mixedbread rerankers, and Jina cross-encoders, which can be self-hosted for cost control at scale. ColBERT-style late-interaction rerankers like answer-ai's ColBERTv2 offer a middle ground of quality and speed. Choice depends on language coverage, latency target, and whether on-premises deployment is required.