Heliconevs
PromptLayer
PromptLayer: PromptLayer offers a comparable prompt management and LLM observability platform.
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Open-source LLM observability and gateway platform for AI applications
Overview
Helicone is an open-source LLM observability platform and AI gateway for developers building AI applications. It provides request tracking, session and user analytics, prompt management, a query language for logs, a playground for testing, rate limiting, and alerting, and works across providers including OpenAI, Anthropic, Azure, and others.
The honest half
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Helicone.
Cross-shopped
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.
PromptLayer: PromptLayer offers a comparable prompt management and LLM observability platform.
Arize AI: Arize AI provides similar LLM and ML observability with a broader evaluation framework.
Pricing
Taken from the vendor's own pricing page. Prices move, so check before you buy.
Hobby
Free
Pro
$79 /mo
Team
$799 /mo
Enterprise
On request
Capabilities
Request dashboard and tracking
Logs and visualizes every LLM request with cost and latency data.
Sessions and segments
Groups related requests into sessions for debugging multi-step flows.
Helicone Query Language (HQL)
Lets users query request logs with a purpose-built query language.
Prompt datasets and improvement
Captures prompts into datasets for iteration and testing.
Playground
Provides an interactive environment to test prompts against models.
Rate limits and alerts
Configures usage rate limits and alerting on requests.
Answered, with sources
Each answer names the page it came from, so you can check it rather than take our word for it.
Helicone offers a free Hobby plan, a Pro plan at $79/month, a Team plan at $799/month, and custom Enterprise pricing, with usage-based charges applying beyond included request limits.
SourceThe free Hobby plan includes 10,000 requests per month, 1 GB of storage, 1 seat, and 1 organization, aimed at kickstarting AI projects.
SourceHelicone offers 50% off the first year for qualifying startups, discounts for non-profits, a $100 annual credit for open-source projects, and free access for students.
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Softwr does not host reviews and shows no star rating for Helicone, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.
What people switch to, and what they give up
Every tier, and where the cost actually lands
Put it head to head with anything we hold
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