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Langtail
A low-code platform for testing, managing, and deploying LLM applications. It features a collaborative playground, systematic testing suites, and an AI Firewall to ensure prompt reliability.
About Langtail
What the tool does and who it's for
Langtail is a comprehensive low-code platform designed to help teams build, test, and deploy LLM-powered applications with higher confidence. It provides a collaborative environment where developers and non-technical stakeholders can experiment in a no-code playground, manage prompt versions, and run systematic test suites to prevent regressions. The platform includes advanced features like an AI Firewall to block prompt injections, detailed performance logging for latency and cost tracking, and the ability to deploy prompts as independent API endpoints. By streamlining the evaluation process with LLM-powered assertions and custom JavaScript logic, Langtail ensures that AI applications remain reliable even as underlying models or prompt structures evolve.
Key capabilities
Pricing
Freemium — plans below
Free
$0/month
- Unlimited users
- 2 prompts or assistants
- 1,000 logs per month
- 30 days data retention
- Public shareable apps
Pro
$99/month
- 1 user
- 20 prompts or assistants
- Unlimited logs
- 90 days data retention
- Public shareable apps
Team
$499/month
- 10 users
- Unlimited prompts or assistants
- Unlimited logs
- 1 year data retention
- Radars & Alerts
- Dedicated support
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