Hard facts side by side: free tiers, prices, limits, SDKs and privacy. Every value links to the official page it came from and is re-checked every week.
| For tool calling |  LangChain |  ZapierBuilding block |  Composio |
|---|---|---|---|
| Free tier | Free & open source MIT library; LangSmith Developer plan is free with up to 5k base traces/month, 1 seat. Source, Nov 15, 2026 | Yes 100 tasks/month, two-step Zaps only, 15-minute polling. Source, Nov 15, 2026 | Hobby: 100,000 tool calls a month $0, no card; 50,000 triggers a month, 3 team members; first 1,000 connected accounts free Source, Nov 15, 2026 |
| Starting price | Free, open source Hosted LangSmith Plus is $39/seat/month with up to 10k base traces/month, then pay-as-you-go. Source, Nov 15, 2026 | $19.99/month Professional, billed annually ($29.99 monthly): 750 tasks, multi-step Zaps, premium apps. Source, Nov 15, 2026 | $29 a month (Pro) Includes a $29 monthly usage credit that does not roll over, plus unlimited team members Source, Nov 15, 2026 |
|---|
| Rate limit | 5k traces/month LangSmith free Developer plan, then pay-as-you-go. Source, Nov 15, 2026 | 20,000 requests per 5 min (instant) Per user, 429 over that. Polling Zaps on Free/trial are held past 200 requests per 10 min per Zap. Source, Nov 15, 2026 | 2,000 requests a minute (Hobby) Per organization over a fixed one-minute window; Pro gets 10,000 a minute, Enterprise is custom Source, Nov 15, 2026 |
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| Size limit | Not listed | 30 s per code step Professional/Team code steps; Free is 1 s; paid plans can extend to 10 min. Source, Nov 15, 2026 | Not listed |
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| Storage | Traces kept 14 days LangSmith base traces; extended traces kept 180 days at extra cost. Source, Nov 15, 2026 | Not listed | Not listed |
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| Official SDKs | PythonJavaScript / TypeScriptSource, Nov 15, 2026 | JavaScript / TypeScriptPython | PythonJavaScript / TypeScript |
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| Open source | Yes MIT licence Source, Nov 15, 2026 | Not listed | Partly The SDK repo ComposioHQ/composio is MIT licensed; tool calls run through Composio's hosted backend Source, Nov 15, 2026 |
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| Trains on your data | No Runs in your own code; LangSmith states it does not use your data to train models. Source, Nov 15, 2026 | No Workflow data is not used for training on any plan; learning from how workflows are built can be opted out. Source, Nov 15, 2026 | Not listed |
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| EU hosting | Yes LangSmith cloud offers an EU region (eu.smith.langchain.com, GCP EU). Source, Nov 15, 2026 | No Hosted on AWS in the United States. Source, Nov 15, 2026 | Not listed |
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| Compliance | SOC 2ISO 27001GDPRHIPAASource, Nov 15, 2026 | SOC 2GDPRSource, Nov 15, 2026 | SOC 2ISO 27001 The enterprise page says SOC 2 Type II attested and ISO 27001:2022 certified Source, Nov 15, 2026 |
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Python package composio and TypeScript package @composio/core, plus a provider package per framework
Wirestack