Visual workflow builder
Teams can wire blocks, models, and integrations together in a visual builder. The workflow graph becomes agent logic that can be run from the same workspace.
Sim
Sim is an open-source AI workspace for teams to build, deploy, and manage AI agents and workflows, with 1,000+ integrations and major LLMs.
Overview
Sim is an open-source AI workspace for building, deploying, and managing AI agents and workflows. It brings workflow design, execution, context storage, and run monitoring into one product so teams do not have to stitch those pieces together across separate tools.
The public pages describe three ways to create agents: visually with blocks, conversationally in plain language, or with code. Teams can connect 1,000+ integrations and every major LLM, then run the result as an API, Slack bot, or scheduled job.
Core capabilities
Conversational creation
Sim also supports describing the agent in plain English. The workspace assembles the workflow from the request, which is useful when starting from a process description instead of a diagram.
Code-based steps
For cases that need exact control, Sim supports code blocks alongside the rest of the workflow. The pages position code as one more way to build within the same agent graph.
Deployment options
Workflows can be deployed as APIs, Slack bots, or scheduled jobs. The product page also says workflows can be exposed as endpoints so other systems can call them.
Run monitoring
Sim traces each run block by block and shows logs and real cost. The monitoring view is meant to explain what ran and why, not just whether a workflow succeeded.
Context and storage
The workspace stores data semantically in tables, files, and knowledge bases so agents can reason from connected context. This is presented as the memory layer for agents.
Common workflows
Internal automation as an API
A product or operations team can turn a multi-step internal process into a visual workflow, test it, and then expose it as an API endpoint for other systems to call.
Support triage and drafting
Support teams can route incoming messages through a workflow that reads context from tables or knowledge bases, drafts a reply, and escalates only when needed.
Lead enrichment and routing
Sales or growth teams can enrich new leads, score them against criteria, and post the result into Slack or a CRM workflow using connected integrations.
Scheduled technical workflows
Engineering or DevOps teams can use code blocks, schedules, and integrations to build agents that run on a cadence and interact with tools such as Jira, GitHub, or observability systems.
Rapid workflow prototyping
Teams that prefer to start from intent rather than diagrams can describe the desired outcome in plain language, let Sim assemble the workflow, and then refine it in the visual builder or code.
Pros and Cons
Pros
- Combines building, deployment, context, and monitoring in one workspace.
- Supports multiple creation modes: visual, conversational, and code.
- Connects to a large integration catalog and major LLMs.
- Shows block-level traces, logs, and cost for each run.
- Offers a free entry tier plus paid plans for scaling teams.
Cons
- The public pages do not provide complete technical documentation for every integration or model option, so buyers may need to validate fit during evaluation.
- Some governance and deployment controls are only described at a high level on the public pages, with more detailed capabilities appearing in the pricing tiers.
FAQ
What is Sim used for?
Sim is intended for teams that want to build and operate AI agents in one workspace. The pages describe agents that can be created visually, in natural language, or with code, then deployed as APIs, Slack bots, or scheduled jobs.
How do you build agents in Sim?
The source pages show a visual workflow builder plus conversational and code-based creation modes. Sim also provides monitoring with block-by-block traces, logs, and cost visibility.
What kinds of integrations does Sim connect to?
Sim supports 1,000+ integrations on the home and workflow pages, and the integrations directory lists apps such as Slack, HubSpot, Salesforce, Notion, Airtable, Gmail, GitHub, Jira, and Linear.
Does Sim have a free plan?
The pricing page shows Free, Pro, Max, and Enterprise plans. Free starts at $0, while Pro and Max are billed per user per month and Enterprise is custom.
What should teams know before adopting it?
The product pages describe Sim as open-source and SOC2 compliant, but the public pages do not spell out every deployment or governance detail. Enterprise includes custom terms and features such as self hosting, SSO, access control, and dedicated support on the pricing page.
Quick Facts
- Category
- AI workspace / developer tool
- Website
- sim.ai
- Product type
- Open-source software
- Primary users
- Teams building AI agents and workflows
- Pricing shape
- Free plan, paid per-user plans, and custom Enterprise
- Integrations
- 1,000+ integrations on the home and workflow pages; 225+ apps listed in the integrations directory
- Deployment outputs
- APIs, Slack bots, scheduled jobs
- Notable controls
- Access control, SSO, self hosting, and dedicated support appear on higher tiers
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