Sim

What Sim is

Sim is an open-source workspace for building AI agents. Workflows are designed visually or in code, given memory through a knowledge base, backed by structured tables and a shared file store, and every agent decision is traced in logs.

The detail that matters most is not on the feature list, it is the license. Sim is Apache-2.0, which permits commercial use, modification and redistribution without the restrictions that source-available licenses impose. n8n, the tool most people compare it to, ships under the Sustainable Use License, which limits commercial hosting. If you intend to self-host and sell what you build on top, that difference is the decision, and it is worth reading both licenses rather than taking either vendor's summary.

The platform connects to 1,000 or more integrations and every major model provider, with self-hosting available on higher tiers alongside SSO and SOC 2 compliance.

Pricing

Four plans, credit-metered, with annual billing 15% lower than monthly.

Annual billing is 15% lower than the monthly prices shown.

The free tier's 1,000 credits are a one-time allowance with no weekly refresh, so the practical limit is total usage rather than throughput. Pro is the first tier with a refresh, at 2,000 credits per week on top of its 6,000 monthly credits.

Where Sim is the strongest pick

Sim is the strongest pick when you plan to self-host an agent platform commercially. The Apache-2.0 license removes the restriction that makes the obvious alternative awkward for that use, and the free tier is a genuine forever plan rather than a trial, so the licensing question can be tested rather than argued.

Best for

Engineering teams building agent workflows they intend to host themselves, especially where the license terms of the alternative are a blocker.

Key features

• Visual workflow designer, or code
• Knowledge base for agent memory
• Structured tables and a shared file store
• Full execution logs and tracing
• 1,000 or more integrations
• Every major LLM provider
• Self-hosting on higher tiers
• SSO and SOC 2 compliance on Enterprise

Best-fit use cases

• Automating outreach and CRM upkeep
• Resolving IT tickets and access requests
• Internal engineering automation with full traceability
• Self-hosted agent platforms inside a commercial product

Pros

• Apache-2.0 license permits unrestricted commercial self-hosting
• Free forever tier, 1,000 credits to spend
• Visual and code paths to the same workflow
• Execution logs trace every agent decision
• 1,000 or more integrations

Cons

• Credit metering applies on every tier, including paid
• Self-hosting sits on higher tiers
• Younger and smaller ecosystem than the established alternatives
• Pro is billed per user, so team costs scale with headcount

What to watch out for

Check the credit maths against your expected run volume before comparing headline prices, because the plans differ more in credits than in features. If self-hosting is the reason you are here, confirm which tier unlocks it, since it is not on the free plan.

Is Sim worth it?

If the license matters to you, yes, and the free tier costs nothing to test. If you only need hosted automation and have no plans to self-host commercially, judge it on integrations and credit cost against the incumbents rather than on licensing.

FAQ

Pricing and feature claims verified August 2026 from sim.ai and sim.ai/pricing. Sim has no affiliate program and no paid placement with ToolChase; the links above are plain, uncompensated links.