The 3 Best Promptfoo Alternatives in 2026

DeepEval lets you write LLM tests the way you write unit tests: assert that an output passes metrics such as answer relevancy, hallucination, tool correctness or task completion, and run them with pytest in CI. It is Apache-2.0 licensed (about 19K GitHub stars) and ships 50+ research-backed metrics, including agent-specific ones. Its maker, Confident AI, hosts results, datasets and tracing: Free for 2 seats and 5 test runs a week, Starter $200/month per organization (unlimited seats, online evals, chat simulations), Team $2,000/month (SSO, SOC 2), and custom Enterprise.

• Feels like unit testing, runs in pytest
• Agent metrics like tool correctness
• Free and open source

Ragas is the standard toolkit for measuring retrieval-augmented generation. It scores whether answers are grounded in the retrieved context (faithfulness), whether retrieval found the right passages (context precision and recall) and whether the answer addresses the question, using LLM-based and traditional metrics. It can also generate synthetic test sets from your own documents, so you do not have to hand-write questions. It is Apache-2.0 licensed with about 16K GitHub stars, integrates with LangChain, LlamaIndex and observability tools, and is free. Agent-specific evals are listed as coming soon.

• The reference metrics for RAG quality
• Generates test sets from your documents
• Free and open source

Coval tests voice and chat agents the way self-driving teams test cars: it runs your agent against many simulated callers, personas and scenarios before launch, scores every conversation, then monitors live calls in production with alerts and human review queues. It has a REST API, CLI and MCP server, and states SOC 2 Type II, HIPAA and GDPR compliance. Starter is $100/month (100 simulation minutes, 1,000 monitored calls, $0.40 per extra simulation minute), Growth $500/month (1,000 simulation minutes, 10,000 monitored calls) and Enterprise from $4,500/month. Plans include unlimited seats and a 7-day trial that requires a card.

• Built for voice agents, with realistic simulated callers
• Testing and production monitoring in one
• Published prices and unlimited seats