📖 The AI Tool Bible

Gorilla vs Izlo

A side-by-side look at pricing, capabilities, pros, cons, and our editorial scores.

 
Gorilla
Agents
Izlo
Agents
TaglineOpen-source LLM purpose-built for function calling and API invocation across thousands of tools.Prompt management platform with version control, collaboration, and an API for production deployment.
CategoryAgentsAgents
PricingFree· Free and Apache 2.0; self-hostedPaid· Solo $20/mo; Pro $25/user/mo; Enterprise $39/user/mo
Modelgorilla-openfunctions-v2 (6.91B)Model-agnostic
Editorial score7.3 / 106.9 / 10
Use cases
function-callingtool-useapi-invocationagent-backbonerag-fine-tuning
prompt-managementversion-controlteam-collaborationprompt-testingproduction-deployment
Pros
  • Fully open-source (Apache 2.0) with weights on HuggingFace
  • Purpose-trained for function calling, not a generic chat model retrofitted
  • Includes BFCL leaderboard as a public eval harness
  • GoEX runtime adds undo and damage-confinement for executed actions
  • Active Berkeley research backing with regular updates
  • Git-style version history and activity log for every prompt change
  • Remix sandbox isolates experiments from production prompts
  • REST API lets you swap prompts without redeploying the app
  • Built for multi-user team editing, not just solo developers
Cons
  • Research project polish; not a managed SaaS
  • Smaller param count than frontier closed models
  • Self-hosting and ops are on you
  • Documentation skews toward papers and notebooks
  • No free tier; cheapest plan is $20/mo
  • Stingy token allowance (5K/seat) for in-app testing
  • Lighter on observability/analytics than Langfuse or Helicone
  • Supported model providers not clearly listed on the site
Websitegorilla.cs.berkeley.edugetizlo.com
Pick Gorilla if
  • ✅ Fully open-source (Apache 2.0) with weights on HuggingFace
  • ✅ Purpose-trained for function calling, not a generic chat model retrofitted
  • ✅ Includes BFCL leaderboard as a public eval harness
  • ✅ GoEX runtime adds undo and damage-confinement for executed actions
Pick Izlo if
  • ✅ Git-style version history and activity log for every prompt change
  • ✅ Remix sandbox isolates experiments from production prompts
  • ✅ REST API lets you swap prompts without redeploying the app
  • ✅ Built for multi-user team editing, not just solo developers
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