Langtail

✓ verified, sync 2026-08-20

10 checks on record, most recent 2026-11-03 (responded).

PricingFreemium

Category Large Language Models (LLMs)AI TestingNo-Code&Low-CodePrompt EngineeringAI Developer ToolsAI API +13

Community scorenot yet rated

First indexed2026-08-20

Observation record.

What was checked ourselves, with dates. Not vendor copy, not a rating.

Most recent check 2026-11-03

Result: responded.

Checked on 10 distinct dates, since 2026-09-02. Checked roughly every 6.9 nights on this listing's own record.

2026-11-032026-10-262026-10-202026-10-142026-10-082026-10-022026-09-262026-09-202026-09-142026-09-02

What this means: the 3-miss rule marks a listing discontinued only after three consecutive failed checks; a bot-wall response never counts toward that streak. the methodology

Price events.

auto-diffed on every sync: the changelog other directories don't keep

The price was checked on 2026-11-03; 1 price event is still pending review and not reflected here.

No approved price events on record

No approved price change is on record.

Features

As listed by the vendor, unedited.

LLM Testing
AI Firewall
Prompt Management
Collaboration Tools
Data-driven Insights
Debug Prompts: Quickly refine and optimize LLM performance with support for variables, functions, and more.
Testing Suite: Run tests to ensure app stability and prevent surprises when updating models.
Deployment Options: Deploy prompts as API endpoints across multiple environments, such as preview, staging, and production.

What it does.

The vendor's own description, unedited, not our claim.

Langtail is a low-code platform for testing AI applications, focusing on LLM testing. Control unpredictable LLM outputs with Langtail's testing tools, which let you score tests using natural language, pattern matching, or custom code. Optimize your AI models by experimenting with different parameters and prompts, using insights from detailed analytics. Integrate Langtail with a user-friendly, spreadsheet-like interface. Enhance your AI app's security with AI Firewall to prevent prompt injections and information leaks. Streamline your AI development and testing process with Langtail. Try it for free today.

registry ID ndock:tool:langtail

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