AI Governance Safety & Evaluation Freemium

Langtail

Collaborative prompt development, testing, deployment, and LLM observability platform

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PricingFreemium
Starting price$99/mo
Free planYes
Free trialYes
APIYes
Open sourceNo
DeploymentHybrid
Last verifiedAugust 1, 2026
Overview

Tool overview

Langtail is listed under AI Governance Safety & Evaluation AI tools.

Summary

What is Langtail?

Langtail helps product and engineering teams develop AI applications through a collaborative prompt playground, test suites, deployments, logs, metrics, shared applications, alerts, and an AI firewall. Prompts can be published as API endpoints without redeploying application code.

Best fit

Best for

Product and engineering teams shipping prompt-driven AI applications collaboratively

Audience

Who is it for?

Prompt and AI engineersProduct engineering teamsQuality and evaluation teamsEnterprise AI platform teams
Recommendation

Decision note

Confirm VAT, workspace limits, prompt and log quotas, retention, deployment traffic, alerts, provider costs, AI firewall, self-hosting, support, and enterprise security.

Capabilities

Key features

Collaborative playground for prompts and assistants

Repeatable tests for prompt and model changes

Prompt deployment as managed API endpoints

Logs, metrics, radars, and alerts

Public shareable applications for prototypes

Enterprise AI firewall and self-hosting options

Workflows

Use cases

Developing and versioning production prompts

Testing LLM application behavior

Deploying prompts without application releases

Monitoring model logs and regressions

Strengths

Pros

  • Free tier supports unlimited users
  • Combines development, testing, and deployment
  • Publishes self-hosting for enterprise
Considerations

Limitations

Langtail tests cannot prove complete model safety or correctness. Teams must create representative cases, review logs, protect provider keys and sensitive prompts, validate deployments, monitor drift, and maintain human approval for consequential outputs.

Cost

Pricing details

Pricing modelFreemium
Starting price$99/mo
Free planYes
Free trialYes
Pricing context

Billing options

Free planMonthly subscriptionCustom enterprise agreement
Pricing context

Pricing note

Langtail Free costs $0 with unlimited users, two prompts or assistants, 1,000 monthly logs, and 30-day retention. Pro costs $99 per month plus VAT, Team costs $499, and Enterprise pricing is custom.

View official pricing
Compatibility

Supported languages

  • English
Connectivity

Integrations

OpenAI-compatible providers

LangChain

Langtail SDK

API endpoints

Discord

Specs

Technical details

PlatformsWeb, API
Multilingual supportUnknown
Login requiredYes
Open sourceNo
DeploymentHybrid
CompanyLangtail
Models / versionsPlayground Tests Deployments Logs and Metrics AI Firewall
Editions / plansFree, Basic, Professional, Organization, and Custom plans
Data confidenceHigh
Last verifiedAugust 1, 2026
Documentation → Release notes → Data source →
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Answers

Frequently asked questions

Langtail helps product and engineering teams develop AI applications through a collaborative prompt playground, test suites, deployments, logs, metrics, shared applications, alerts, and an AI firewall. Prompts can be published as API endpoints without redeploying application code.
Product and engineering teams shipping prompt-driven AI applications collaboratively
The listed pricing model for Langtail is Freemium. Pricing can change, so users should verify the latest plan details on the official website.
Yes. The current profile indicates that a free trial is available.
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