Revalvo is a local-first workbench for prompt engineering and LLM evaluation. Run the same prompt against every model in parallel, score responses with 40 built-in evaluators, version prompts like code, and batch-test on datasets — before anything hits production. No account, no hosted database: your API keys stay in your browser.
Exploring options beyond Revalvo? Try Langfuse to track prompts, evals, and latency across LLMs. Run side-by-side tests with OpenRouter Model Fusion and blend the best answer. For chat-centric workflows, TypingMind - Chat UI for LLMs and Poe offer fast multi-model UIs. Need observability? Helicone AI logs usage and performance.