Helicone vs PromptLayer
Two of the most-asked-about agents in the developer-tools space. Here's how they actually stack up.
Helicone
LLM observability and cost monitoring for production AI applications
Free tier
Read full review →PromptLayer
Prompt versioning, management, and monitoring for teams shipping LLM applications
Free tier
Read full review →Side-by-side comparison
| Helicone | PromptLayer | |
|---|---|---|
| Tagline | LLM observability and cost monitoring for production AI applications | Prompt versioning, management, and monitoring for teams shipping LLM applications |
| Pricing | Free tier | Free tier |
| Categories | developer-tools, api, productivity | developer-tools, productivity |
| Made by | Helicone | PromptLayer |
| Launched | 2023-06 | 2022-12 |
| Platforms | Web, API | Web, API |
| Status | active | active |
Helicone highlights
- + One-line integration via proxy URL change, no SDK required
- + Real-time cost tracking per model, user, and custom property
- + Request and response logging with full prompt and output capture
- + Latency monitoring and percentile breakdowns by model and endpoint
- + User segmentation: track costs and usage per end-user or organization
PromptLayer highlights
- + Prompt versioning with named releases and rollback capability
- + Request log viewer: see every LLM call with full prompt, response, and metadata
- + Search and filter request history by metadata, model, or custom tags
- + Analytics dashboard: track token usage, latency, and cost over time
- + Visual prompt template editor with variable injection
Frequently Asked Questions
Which is better, Helicone or PromptLayer?
Neither is universally better. Helicone (Free tier) leans into developer-tools, while PromptLayer (Free tier) is closer to developer-tools. Pick based on which workflow you actually do every day.
What is the price difference between Helicone and PromptLayer?
Helicone is free tier. PromptLayer is free tier. See the pricing row in the comparison table.
Can I use Helicone and PromptLayer together?
In most cases, yes. They serve overlapping but distinct needs, so running them side by side is common until you decide which fits your workflow.