Best alternatives to Respan in 2026

Building an AI feature usually starts with a single API call to one model provider, but production reality is messier: you need fallbacks when a provider has an outage, visibility into what your agents actually did, and a way to know whether a prompt change made things better or worse. Respan bundles those needs into one platform instead of making you stitch together separate tools. Respan (formerly Keywords AI) routes requests to over 1,000 LLMs through a single gateway with automatic fallbacks and retries, traces every call an application or agent makes for debugging, runs automated evaluations using LLM judges or deterministic checks, and manages prompt versions so teams can test and roll out changes safely. It's backed by Y Combinator, processes over 80 trillion tokens, and holds ISO 27001, SOC 2, and GDPR/HIPAA-track compliance. Pricing starts with a free tier (100k logs, 1k scores, 5 datasets a month), a Team plan at $199/month billed annually, and custom Enterprise pricing, with metered add-ons for extra logs, scores, seats, and HIPAA compliance.