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 summaries |  n8nBuilding block |  Exa |  AssemblyAI |
|---|---|---|---|
| Free tier | Free trial + free self-host Cloud free trial, no card required; Community Edition is free to self-host. Source, Nov 15, 2026 | Yes $10 in credits each month, resets monthly (up to 2,500 Lite searches). Source, Nov 15, 2026 | Yes $50 in free credits at signup, no credit card required. Source, Nov 15, 2026 |
| Starting price | €20/month Starter, billed annually: 2.5K executions/month, 5 concurrent executions, unlimited workflows. Source, Nov 15, 2026 | $4 per 1,000 searches Pay-as-you-go Lite search, up to 10 results per request. Source, Nov 15, 2026 | $0.15 per hour Universal-2 pre-recorded speech-to-text (Universal-3.5 Pro: $0.21/hr). Source, Nov 15, 2026 |
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| Rate limit | 2.5K executions/month Starter cloud plan, with 5 concurrent executions. Source, Nov 15, 2026 | 10 QPS Default for /search, /answer and /chat/completions; /contents is 100 QPS. Source, Nov 15, 2026 | 5 concurrent transcriptions Free accounts, async; paid accounts get 200+. Source, Nov 15, 2026 |
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| Size limit | Not listed | 100 results per query Public max for numResults; higher limits by emailing Exa support. Source, Nov 15, 2026 | 5 GB / 10 hours per file Transcript endpoint; direct uploads via /v2/upload capped at 2.2 GB. Source, Nov 15, 2026 |
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| Storage | Logs kept 7 days Starter plan max execution log retention; Pro keeps 30 days. Source, Nov 15, 2026 | Not listed | Transcripts kept ~30 days Async audio deleted within 24-48 hours; transcript deletion begins at 30 days. Source, Nov 15, 2026 |
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| Official SDKs | JavaScript / TypeScriptPythonSource, Nov 15, 2026 | PythonJavaScript / TypeScript | PythonJavaScript / TypeScript |
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| Open source | Partly Fair-code, Sustainable Use License; self-hostable Source, Nov 15, 2026 | Not listed | Not listed |
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| Trains on your data | No AI terms say customer content is not used to train ML models. Source, Nov 15, 2026 | Not listed | Opt-out Certain PII-redacted files used for training unless opted out, on a BAA, or using EU servers. Source, Nov 15, 2026 |
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| EU hosting | Yes n8n Cloud data is hosted in the EU (Frankfurt, Germany). Source, Nov 15, 2026 | Not listed | Yes EU endpoint api.eu.assemblyai.com keeps data in the EU. Source, Nov 15, 2026 |
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| Compliance | SOC 2GDPRSource, Nov 15, 2026 | SOC 2 SOC 2 Type II certified. HIPAA is only offered as an Enterprise option to discuss with sales. Source, Nov 15, 2026 | SOC 2ISO 27001GDPRHIPAA SOC 2 Type 2 and ISO 27001; GDPR via EU servers; HIPAA BAA available. Source, Nov 15, 2026 |
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