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sim

Free

Build, deploy, and orchestrate AI agents. Sim is the central intelligence layer for your AI workforce.

AI ChatbotsFreeFree tier
Type
Open Source
Visit Website GitHub (28.3k stars)

About sim

Sim is the open-source AI workspace where teams build, deploy, and manage AI agents. It offers a visual builder, conversational interface, and code-based agent creation, supporting 1,000+ integrations (e.g., Slack, HubSpot, Salesforce, Notion) and every major LLM. Sim provides semantic memory via tables, files, and knowledge bases, and includes live monitoring with traces, logs, and cost tracking. SOC2 compliant and trusted by over 100,000 builders, Sim scales from a free forever plan to enterprise with custom options.

Key Features

Visual builder for composing agent logic
Conversational agent creation (describe it to Sim)
Code-based agent building
1,000+ integrations including Slack, HubSpot, Salesforce, Notion
Supports every major LLM
Semantic memory with tables, files, and knowledge bases
Live monitoring with traces, logs, and real cost
SOC2 compliant
Open source with self-hosting option (enterprise)
Free forever plan with 1,000 daily credits

Pros & Cons

Pros
  • Free tier available with generous daily credits
  • Open source with no vendor lock-in
  • 1,000+ integrations for broad tool connectivity
  • Support for all major LLMs provides flexibility
  • Visual builder lowers the barrier for non-developers
  • Live monitoring and debugging tools for transparency
  • SOC2 compliance suitable for enterprise use
  • Simple deployment; agents can be built in minutes
Cons
  • Free tier has limited monthly credits (1,000 per day) and concurrency (10 concurrent executions)
  • Advanced features like SSO and self-hosting only available on higher-priced plans
  • Complex agent logic may still require understanding of workflows and integrations
  • Execution timeouts on free tier (sync 5 min, async 90 min) may be restrictive for long-running tasks

Best For

Automating support email triage and responseEnriching leads with company data and posting to sales channelsAutomating workflows across SaaS tools like CRM and marketingBuilding AI agents for internal operations and knowledge retrievalCreating multi-agent parallel workflows for complex tasks

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FAQ

What is Sim?
Sim is an open-source AI workspace where teams build, deploy, and manage AI agents. It integrates with 1,000+ tools and supports every major LLM.
Is Sim free?
Yes, Sim offers a free forever plan with 1,000 monthly credits refreshed daily, one workspace, and basic features. Paid plans start at $25/user/month.