Simple pricing for everyone

Start for free, collaborate with your team, and scale as you grow.
All plans include unlimited users.


Perfect for small businesses and solopreneurs.


Start for free
  • Unlimited users
  • 24-hours Test Result history
  • No version history
  • 1000 Logs per Month
  • Community support


Limited offer

Better for growing businesses with more customers.

$99/month(Free during beta)

Get started for free
  • Unlimited users
  • Unlimited Test Results
  • Unlimited Prompt Versions
  • 10000 Logs per Month
  • Live LLM assertions
  • E-mail support


Best for large businesses with advanced needs.


Contact us
  • Everything in Pro
  • SAML Single-Sign-On (SSO)
  • Custom Security Questionnaires
  • Custom contract & SLAs
  • Unlimited Logs per Month
  • Private Slack support channel

Frequently asked questions


Engineering and AI teams Langtail

“Langtail simplifies the development and testing of Deepnote AI, enabling our team to focus on further integrating AI features into our product”

Ondřej Romancov
Software Engineer at Deepnote

“If you're continuously optimizing your LLMs and not using a logging solution, you're seriously missing out. As a prompt engineer, I absolutely love the freedom to test whatever I want independently of the backend team. And finally, we see this within a quality user interface.”

Yiğit Konur
Head of AI at Wope

Ready to upgrade your AI dev workflow?

Langtail is the most enjoyable way to debug, test, and observe LLM-powered apps. Try it for free, no credit card needed.