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PromptLayer
43
Stack Score
Editorial pick✓ Verified working
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PromptLayer

Prompt versioning + management for LLM apps.

Try PromptLayer✓ Free trial available

Best for

Best for AI teams focused on iterating prompts in production.

At a glance

Pricing
freemium
Setup time
15 minutes
Learning curve
easy
Last verified
5/26/2026

What we love

  • ✓Focused prompt-management UX
  • ✓Generous free tier
  • ✓Easy OpenAI proxy setup

Where it falls short

  • −Less observability than LangSmith
  • −Best for prompt iteration
  • −Pricing climbs with logs

Pricing

✓ Pricing verified Jun 21, 2026

2 tiers

Free

$0

per month

  • ✓5K requests/mo

Pro

$50

per month

  • ✓50K requests

Overview

PromptLayer is a prompt management + logging tool for LLM apps — versioning, A/B testing, analytics. Used by teams iterating on prompts in production.

Key features

  • ●Prompt versioning
  • ●A/B testing
  • ●Analytics + logs
  • ●Multi-model support
  • ●OpenAI proxy

Best use cases

Prompt A/B testing

A/B test prompts in production to find winners.

Prompt CMS

Manage prompts in a CMS-style UI versioned for rollback.

Integrations

OpenAI
Anthropic
LangChain
Python
JS

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