# HumanLoop Shutdown: Guide to Migrating Your Prompts and Evals to PromptLayer

Jonathan Pedoeem July 17, 2025 3 min read

[HumanLoop](https://humanloop.com/) shut down on September 8, 2025. If your team relied on HumanLoop for prompt management, evaluations, and observability, you may still be looking for a stable replacement. PromptLayer offers everything HumanLoop did—and more.

## What is PromptLayer?

PromptLayer is a comprehensive prompt engineering platform that serves as the “Git for prompts,” helping teams manage, version, and improve prompts with confidence. Founded in 2023, it provides:

- **[Prompt Registry](/content/prompt-management/index.html)**: Version control and management for all your prompts
- **Evaluations**: Automated testing to ensure prompt quality
- **Observability**: Complete logging and analytics for LLM interactions
- **Collaboration**: No-code interface for non-technical team members
- **A/B Testing**: Built-in experimentation capabilities

PromptLayer was built from day one to empower both engineers AND domain experts (doctors, lawyers, marketers) to collaborate on AI development.

## 1:1 Feature Mapping: HumanLoop → PromptLayer

Here's how HumanLoop features map directly to PromptLayer:

| HumanLoop Feature | PromptLayer Equivalent | Notes |
| --- | --- | --- |
| **Prompt Files & Version Control** | **Prompt Registry** | Git-like versioning with diffs, commit messages, and rollback |
| **Datasets** | **Datasets/Regression Sets** | Import CSV/JSON, create test cases |
| **Evaluators** | **Evaluations** | Code, LLM-based, regex, semantic similarity, and human evaluations |
| **Logs** | **Request Logs** | Complete request/response logging with metadata |
| **Monitoring Dashboard** | **Analytics Dashboard** | Token usage, latency, success rates, cost tracking |
| **Flows/Agents** | **Agents** | Native agent support + framework integration |
| **API/SDK** | **API/SDK** | Python and JavaScript libraries |
| **Team Collaboration** | **Team Workspaces** | Comments, activity logs, role-based access |
| **Model Proxy** | **Logging Wrapper** | Drop-in replacement for OpenAI/Anthropic calls |
| **Online Evaluations** | **A/B Testing** | Live traffic splitting and evaluation |

## All that, plus some more features.

PromptLayer isn't just a replacement—it's an upgrade:

### 1. **Better Collaboration Features**

- Threaded comments on prompt changes
- WYSIWYG no-code editor designed for non-engineers
- Domain experts can directly experiment without touching code

### 2. **More Powerful Evaluations**

- **Conversation Simulator**: Test multi-turn agent interactions
- **Spreadsheet-like Pipeline**: Chain multiple evaluation types
- **6-minute code execution**: More time for complex evaluations
- Built-in eval templates for common use cases

Evaluating Conversational AI with PromptLayer - YouTube

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[Evaluating Conversational AI with PromptLayer](https://www.youtube.com/watch?v=VgsExVpD8_E) [PromptLayer](https://www.youtube.com/channel/UCP4M57oMl8R8_-obqgOrs-Q)

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### 3. **Superior A/B Testing**

- Native A/B testing with traffic splitting
- Real-time performance comparison
- No code changes needed—just toggle in the UI

### 4. **Native Agents + Framework Flexibility**

- Built-in Agents feature for complex workflows
- Also works with ANY LLM framework (LangChain, OpenAI Functions, etc.)
- Not locked into a proprietary agent runtime
- Use your preferred tools while getting PromptLayer's benefits

### 5. **Active Development**

- Well-funded with recent seed round (2025)
- Rapid feature releases based on user feedback
- Direct access to founders for support

## Quick Migration Guide

### Step 1: Export Your HumanLoop Data (Before Sept 8!)

- Prompts and versions
- Evaluation datasets and results
- Logs and feedback
- Use HumanLoop's API endpoints for export

### Step 2: Set Up PromptLayer

```python
# Install PromptLayer
pip install promptlayer

# Initialize with your API key
import promptlayer
promptlayer.api_key = "YOUR_API_KEY"
```

### Step 3: Import Your Prompts

- Create prompts in PromptLayer's Registry
- Copy prompt templates and versions
- Add metadata and comments for context

### Step 4: Recreate Evaluations

- Upload test datasets (CSV/JSON supported)
- Rebuild evaluators using PromptLayer's evaluation types
- Run baseline evaluations to verify parity

### Step 5: Update Your Code

```python
# Before (HumanLoop)
from humanloop import Humanloop
hl = Humanloop(api_key="...")

# After (PromptLayer)
from promptlayer import PromptLayer
pl = PromptLayer(api_key="...")
```

### Step 6: Start Logging

- Replace API calls with PromptLayer's wrapper
- Verify logs appear in the dashboard
- Set up any needed alerts or monitoring

## Take Action Today

With HumanLoop shutting down September 8, 2025, you have limited time to migrate. PromptLayer offers:

- ✅ All of HumanLoop's core features
- ✅ Additional capabilities for better collaboration and testing
- ✅ Active development and support
- ✅ Competitive pricing
- ✅ Easy migration path

**Ready to migrate?** Sign up at [PromptLayer.com](/content/site-root.html) and reach out to our team—we're actively helping HumanLoop users transition smoothly.