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Hexel

Freemium#26 of 31 in AI Agent Observability ToolsAI Agent Platforms

Hexel: A cloud runtime for tracing, governing, and costing production agent fleets. Ranked #26 of 31 in AI Agent Observability Tools by our editors (6.7/10); pricing: Free plan; best for governed agent fleet operators.

6.7/10Editor score
Visit Hexel
Hexel6.7 Visit Hexel

At a glance

  • Editor score
    6.7 / 10
  • Pricing
    Free plan
  • Best for
    Governed agent fleet operators
  • Free plan
    Yes
  • Session replay
    Yes
  • Founded
    2024
  • Facts checked
    22 Sep 2026
Hexel screenshot

  • Where it wins

    • Trace DAGs, replay, and immutable audit logs support investigation.
    • Policies cover allow, deny, and human-approval rules before execution.
    • HFU attribution breaks costs down by fleet, task, and team.

  • Where it doesn't

    • Cloud-only deployment does not suit self-hosted environments.
    • Longer trace retention and advanced controls require higher tiers.
    • Dedicated isolation and custom SIEM streaming are limited to Enterprise.

Our verdict on Hexel

Hexel is a cloud runtime for engineering teams operating production AI agent fleets. It groups agents into fleets with shared identity, budgets, policies, approvals, and guardrails, while recording actions and outcomes for review. The API supports integrations with LangChain, LlamaIndex, CrewAI, AutoGen, OpenAI, Anthropic, Vercel AI, Pydantic AI, Temporal, and Kubernetes. Its fit is strongest for small, mid-market, and enterprise teams managing multiple agents or regulated workflows.

The governance and observability layer is the main reason to consider Hexel. Its policy engine can allow, deny, or route actions for human approval before execution. Trace DAGs connect plans, decisions, tool calls, and outcomes, while run replay supports debugging and audit work. Immutable audit logs can stream to SIEM systems, and HFU cost attribution organizes spend by fleet, task, and team. These capabilities give operators a shared view of behavior, controls, and operating cost rather than treating each agent as an isolated application.

Plans scale from Hobby to Enterprise. Hobby includes one governed fleet, a serverless plane, 10 HFU per month, community support, and 7-day trace retention. Team adds unlimited fleets, Serverless and Fluid planes, 1,000 HFU per month, approval workflows, email and chat support, and 30-day retention. Scale adds the Dedicated plane, volume HFU pricing, SSO, advanced RBAC, priority support, and 90-day retention. Enterprise adds private or VPC isolation, custom audit and SIEM streaming, a dedicated SLA, solutions engineering, and unlimited retention. Hexel is a strong fit for teams prioritizing governance and traceability; teams needing self-hosting should choose an alternative.

Your product? Our editors can test Hexel in depth and publish a review, labelled as paid · from $149/mo →

Hexel pricing

Plans Free planFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 22 Sep 2026.
See plans on hexelstudio.com

All 4 Hexel plans and prices →

Hexel fact sheet

Free planYes
Paid fromNot verified
Trace retention30 days
Session replayYes
Prompt and tool tracingNot verified
Deployment optionsCloud
Agent framework supportSdk
Cost trackingYes
DeploymentCloud
Compliance & securitySOC 2, GDPR
SupportEmail, Live chat, Community
Built forSmall business, Mid-market, Enterprise (editorial estimate)
Integrations10 integrations: LangChain, LlamaIndex, CrewAI, AutoGen, OpenAI, Anthropic …
PricingFree plan (source)
Websitehexelstudio.com
Facts checked22 Sep 2026

Hexel integrations

Hexel lists 10 integrations on its own site.

  • LangChain
  • LlamaIndex
  • CrewAI
  • AutoGen
  • OpenAI
  • Anthropic
  • Vercel AI
  • Pydantic AI
  • Temporal
  • Kubernetes

Alternatives to Hexel

See all Hexel alternatives →

Also Ranked In

Hexel is ranked in 2 of our directories.

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Featured on iTechGuides

Featured on iTechGuides — Hexel 6.7/10

Hexel is listed in our AI Agent Observability Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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