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Levain Labs vs HazelJS

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Levain Labs compared with HazelJS
DetailLevain Labs logo Levain LabsHazelJS logo HazelJS
What it doesThe AI backend that gets better with every run Open-source Agent OS for TypeScript that helps teams operate AI agents like production systems
StageStartup Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelNot given Open source
PricingFree: 500 credits/month, one workspace. Team: $49/month, 3,000 to 80,000 credits/month (fee scales with credits chosen). Enterprise: Custom pricing with volume-discounted usage, customer workspaces via API, pooled credits with spend limits per customer. Not given
Key features
  • Agent delivery via app, Slack, Claude, ChatGPT or events
  • Automatic agent versioning from underperforming runs
  • Stack review and consulting services
  • Organization API with webhooks and delivery history
  • SSO and SAML on Enterprise plan
  • Durable execution with crash-safe HITL
  • Agent DNA for versioning agents as packages
  • Gatekeeper default-deny authorization
  • Skillgate capability curation
  • Local-first deployment without Kubernetes requirement
  • Agent VM with effect typing and speculation
  • Decision Runtime for bounded closed-set judgment
  • Organism for multi-agent coordination
What makes it different
  • Outcome-driven improvement: runs are scored against your goals and underperforming versions automatically improve
  • Hands-on engineering: optional stack reviews and agent builds for customers who want expert implementation
  • Agents live in the same TypeScript DI app as your APIs, not as separate services
  • Production-ready without cloud or Kubernetes dependency
  • Complete operating system, not glue between frameworks
  • Agents pause, resume, and survive restarts in production
  • Developer-first with decorators and DI patterns developers already know
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check7 no change since last check
Trust Flow (Majestic)03
Citation Flow (Majestic)023
Referring domains (Majestic)018

3 details filled in for both companies.

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