Langtail

What it does

Langtail is a prompt management platform for product teams. It offers a spreadsheet-like interface to build, test, and validate prompts, with model experimentation and data-driven insights. It also includes an AI Firewall to block prompt injections and unsafe outputs, and works with major LLM providers.

Langtail is a prompt management platform aimed at product teams. The homepage says it provides a spreadsheet-like interface for managing AI prompts, and that no coding is required. It supports building, testing, and validating prompts with natural language evaluation, pattern matching, or custom code. Teams can experiment with models, parameters, and prompts, and get data-driven insights from prompt performance and user interactions. The AI Firewall is described as a one-click setup that prevents prompt injections, DoS attacks, and information leaks, with customizable content filtering and alerts. Langtail works with OpenAI, Anthropic, Gemini, Mistral, and many more LLM providers. A TypeScript SDK and OpenAPI are available for integration. The pricing page lists a Free plan with 2 prompts or assistants and 1,000 logs per month, a Pro plan at $99 per month, a Team plan at $499 per month, and an Enterprise plan with custom pricing that includes self hosting. The free plan is limited, so growing teams may need a paid plan. Self hosting is only listed on the Enterprise plan. The homepage does not state whether an account is required to use the product.