Kelet Pricing 2026
Complete pricing guide for Kelet — plans, costs, and free options.
💰 Kelet Pricing Overview
Kelet uses a freemium pricing model. Free tier available with optional paid upgrades. Current pricing: Starter is $0 forever: 500 sessions/month, 15-day data retention, full root-cause analysis, prompt patch generation, OTEL and Langfuse integration, and community support. Startup is listed at $400/month but is free during early access — 5,000 sessions included per month with pay-per-session above that, 30-day retention and email support. Enterprise is custom with unlimited sessions, custom retention and integrations, SSO/SAML, an SLA and dedicated support. Human signals and feedback collection are free forever on every tier. No credit card required to start; the vendor states 30 days' notice before pricing changes and grandfathering for early users.. Kelet is a popular ai agent infrastructure tool known for continuously diagnoses why llm apps and agents fail in production and generates the prompt patch. You can get started with Kelet for free and upgrade to a paid plan as your needs grow.
Does ChatGPT recommend your AI tool?
Before you compare plans: does ChatGPT name Kelet when someone asks for a ai agent infrastructure recommendation? Run a free AI-visibility scan on any tool — 5 prompt angles, ~30 seconds, no signup, no card.
🔍 Compare Before You Buy
Comparing Kelet to similar tools helps you make the best choice for your budget and needs:
LangSmith
FreemiumLLMOps platform for debugging and monitoring LLM apps.
Free tier available, paid plans available
Compare with Kelet →Helicone
FreemiumOpen-source LLM observability, logging, and cost tracking.
Free tier available, paid plans available
Compare with Kelet →Complete Your AI Agent Stack
Other ai agent tools in our catalog:
1Password
Try FreeSecrets and credential manager
Keep API keys and .env secrets out of your repo
Consensus
Try FreeAI search across 200M research papers
Source real evidence behind your analysis
Gamma
Try FreeAI presentation builder
Turn ideas into polished decks instantly
💰 Affiliate disclosure: We may earn a commission if you sign up through these links at no extra cost to you.
Kelet Plans & Pricing
Starter is
Forever: 500 sessions/month, 15-day data retention, full root-cause analysis, prompt patch generation
Startup is listed at
Is free during early access — 5,000 sessions included per month with pay-per-session above that, 30-day retention and email support
Enterprise
Is custom with unlimited sessions, custom retention and integrations
* Pricing information is based on publicly available data and may not reflect current promotions, annual discounts, or regional pricing. Visit the official Kelet website for the latest pricing.
Is Kelet your tool?
Claim this listing to get a Featured badge, correct the pricing on this page yourself, and stand out from the 2 alternatives we list for it. All plans include a permanent dofollow backlink to your site.
Claim Now →Is Kelet Free?
Kelet offers a free tier that lets you try the platform without any payment. The free plan typically includes core features with usage limits. For power users, paid plans unlock additional features, higher limits, and priority support.
Check Kelet pricing at the source
The breakdown above is our summary of Kelet's published pricing, not a quote. Plans, limits and what each tier includes change without notice — confirm on Kelet's own pages before you buy.
Official Kelet site ↗We do not represent Kelet and these links are not paid placements.
Is Kelet Worth It?
Kelet is a freemium ai agent infrastructure tool that offers 6 key features including Automatic root-cause analysis on production agent failures, Generates a prompt patch rather than only surfacing traces, OpenTelemetry and Langfuse ingestion. Kelet is root-cause analysis for LLM applications and AI agents in production. Observability tools of the tracing generation are good at showing you that a run failed and what the spans were; Kelet's premise is that the expensive part is the next step — reading a haystack of traces to work out why the agent went wrong and what to change. It ingests from the stack teams already have, with OpenTelemetry and Langfuse integrations plus support for OpenAI, Anthropic, LangChain, CrewAI, Mastra, Agno, Strands, Pydantic AI, Google ADK, the Vercel AI SDK, PostHog and Mixpanel, then continuously diagnoses failures and generates a prompt patch rather than a dashboard. Human signals and feedback collection are free on every tier, which is a deliberate choice: the labels that make failure classification useful are exactly the thing most vendors put behind the paywall, so gating them would break the product for the teams most likely to adopt it. Billing is per session, where a session is one unit of agent work — a conversation, a task run or a pipeline execution — and the free tier covers 500 a month with 15-day retention. The startup tier is $400/month but free during early access with 30 days' notice before pricing changes and grandfathering for early users, so the honest read is that its real economics are not yet proven in the wild.
✅ Kelet is a good choice if you need:
- •Automatic root-cause analysis on production agent failures
- •Generates a prompt patch rather than only surfacing traces
- •OpenTelemetry and Langfuse ingestion
- •Integrations across LangChain, CrewAI, Mastra, Agno, Strands and Pydantic AI
- •Human signals and feedback collection free on every tier
💡 Value Assessment
With a free tier available, Kelet is an easy recommendation for anyone looking to try ai agent infrastructure tools without financial commitment. The paid plans offer good value for power users who need the additional features and higher usage limits.
Kelet Key Features
Kelet comes packed with features that make it a strong contender in the ai agent infrastructure space. Here's what you get:
Powered by advanced AI models, Kelet delivers intelligent content generation capabilities.
Powered by advanced AI models, Kelet delivers intelligent content generation capabilities.
OpenTelemetry and Langfuse ingestion helps you work more efficiently with Kelet.
Powered by advanced AI models, Kelet delivers intelligent content generation capabilities.
Human signals and feedback collection free on every tier helps you work more efficiently with Kelet.
Per-session billing tied to a unit of agent work helps you work more efficiently with Kelet.
Kelet Alternatives & Their Pricing
Considering alternatives to Kelet? Here's how competing tools compare on pricing:
LangSmith
FreemiumLLMOps platform for debugging and monitoring LLM apps.
Pricing: Free tier available, paid plans available
Helicone
FreemiumOpen-source LLM observability, logging, and cost tracking.
Pricing: Free tier available, paid plans available
Ready to try Kelet?
Visit the official website for the latest pricing and to get started.
Frequently Asked Questions
Is Kelet free to use?
Yes, Kelet offers a free tier that you can use without paying. Paid plans starting at $400/month unlock additional features and higher usage limits.
How much does Kelet cost in 2026?
As of 2026, Kelet pricing is: Starter is $0 forever: 500 sessions/month, 15-day data retention, full root-cause analysis, prompt patch generation, OTEL and Langfuse integration, and community support. Startup is listed at $400/month but is free during early access — 5,000 sessions included per month with pay-per-session above that, 30-day retention and email support. Enterprise is custom with unlimited sessions, custom retention and integrations, SSO/SAML, an SLA and dedicated support. Human signals and feedback collection are free forever on every tier. No credit card required to start; the vendor states 30 days' notice before pricing changes and grandfathering for early users.. Pricing may vary based on billing cycle (monthly vs annual) and region. Visit the official Kelet website for the most current pricing.
What is the cheapest Kelet plan?
The cheapest option is the free tier. If you need premium features, the most affordable paid plan is Startup is listed at at $400/month.
Does Kelet offer enterprise pricing?
Yes, Kelet offers custom enterprise pricing with features like dedicated support, custom integrations, enhanced security, and volume discounts. Contact their sales team for a personalized quote.
What are the best alternatives to Kelet?
Popular alternatives to Kelet include LangSmith, Helicone. Each offers different features and pricing structures. Compare them on AISO Tools to find the best fit for your needs and budget.
Is Kelet worth the price?
Kelet is well-regarded in the agent-infrastructure space, offering features like Automatic root-cause analysis on production agent failures, Generates a prompt patch rather than only surfacing traces, OpenTelemetry and Langfuse ingestion. Whether it's worth the investment depends on your specific needs, usage volume, and budget. The free tier lets you try it before committing to a paid plan.
Learn More
📬 Get the best new AI tools delivered weekly
One concise email with fresh launches, trending picks, and featured standouts.