Langtail
Ship AI apps with fewer surprises
SubscriptionAIMonitoring4,600 impressions#8 of its week
Langtail is an LLMOps platform for building, testing, and deploying AI prompts with collaborative management and safety controls.
- for
- Product, engineering, and business teams building AI-powered applications.
- pricing
- freemium
- license
- MIT
Key features
- Spreadsheet-like prompt editor — Manage prompts in a visual, spreadsheet-style interface without coding.
- Prompt testing & validation — Run tests, evaluate outputs with natural language, pattern matching or custom code.
- AI Firewall & safety checks — One-click setup to block prompt injections, DoS attacks and information leaks.
- Data-driven insights — Visualize performance metrics and user interactions for prompt optimization.
- Multi-model support — Works with major LLM providers such as OpenAI, Anthropic, Gemini, Mistral and more.
- Self-hosting option — Deploy on-premises for maximum security and data control.
- Typed SDKs — TypeScript SDK and OpenAPI spec for easy integration into codebases.
Use cases
- Debugging and refining prompts that produce inconsistent LLM responses.
- Collaboratively designing and testing prompts across product and engineering teams.
- Monitoring production prompts for unsafe outputs and receiving real-time alerts.
Langtail pricing
- Free$0/ month + VATUnlimited users · 2 prompts or assistants · 1,000 logs per month · 30 days data retention
- Pro$99/ month + VAT1 user · 20 prompts or assistants · Unlimited logs · 90 days data retention
- Team$499/ month + VAT10 users · Unlimited prompts or assistants · Unlimited logs · 1 year data retention
Langtail vs alternatives
| Best for | Collaborative prompt management and debugging | LLM app observability | Open-source LLMOps | AI coding sidekick | Visual AI backend building |
|---|---|---|---|---|---|
| Pricing | Freemium | Subscription | Free | Free | Free |
| DevHunt upvotes | 3 | 89 | 30 | 63 | 118 |
| Launched | Sep 2024 | Jan 2023 | Jan 2023 | Mar 2024 | Jan 2023 |
- Langtail vs Langfuse: Langfuse focuses on observability and analytics for LLM apps, not prompt management.
- Langtail vs Dify.AI: Dify.AI is an open-source LLMOps platform for building AI-native apps, whereas Langtail is a hosted SaaS with spreadsheet-style prompt UI.
- Langtail vs Pieces Copilot: Pieces Copilot offers AI-assisted coding within the developer workflow, not dedicated prompt lifecycle management.
- Langtail vs BuildShip: BuildShip provides a visual backend builder for AI apps, but does not specialize in prompt testing and safety controls like Langtail.
Langtail FAQ
Can I try Langtail for free?+
Yes, Langtail offers a free tier with unlimited users, 2 prompts or assistants, 1,000 logs per month and 30-day data retention.
What happens if I go over my plan's limits?+
The FAQ section lists this question, but the provided text does not specify the outcome; you would need to contact Langtail for details.
What are logs and how are they counted?+
Logs refer to recorded prompt executions and interactions; the exact counting method is not described in the provided text.
How does the AI Firewall protect my app?+
It provides one-click integration to prevent prompt injections, denial-of-service attacks and information leaks, with customizable content filtering.
Summarized by DevHunt from langtail.com · Sep 28, 2026. Details may change; check the official site.