Deluge runs inside Zoho’s infrastructure — triggered by Zoho events, executed by Zoho’s runtime, with direct access to Zoho’s internal APIs without HTTP overhead. Python runs outside Zoho — on a server, a cloud function or a local machine — and communicates with Zoho through the REST API.
This architectural difference determines which language is appropriate for each use case:
| Characteristic | Deluge | Python |
|---|---|---|
| Runs inside Zoho | Yes | No — runs on an external server |
| Triggers | Workflow rules, blueprints, buttons, schedules | Cron jobs, webhooks, external events, manual runs |
| Zoho data access | Direct (fast, no HTTP overhead) | Via REST API (HTTP calls required) |
| External API access | Yes — via invokeurl | Yes — native HTTP libraries |
| Language capability | Designed for Zoho use cases; limited general computing | Full-featured language; all Python libraries available |
| Hosting required | No — runs on Zoho’s infrastructure | Yes — server, Lambda, Cloud Function, etc. |
| Who can maintain it | Zoho-certified CRM admins after training | Python developers |
| Learning curve for Zoho work | Lower — designed for the Zoho context | Higher — requires API knowledge + Zoho data model |
If the automation starts inside Zoho — triggered by a CRM event, a blueprint transition, a button click or a Zoho schedule — use Deluge. It is faster, simpler and requires no external infrastructure.
If the automation starts outside Zoho — triggered by an external event, a cron job on your own server or a business system that initiates the operation — use Python (or another language) and call the Zoho REST API. External triggers cannot natively start Deluge functions.
For the integration architecture that uses both together — external Python services calling Zoho’s API, and Deluge functions handling the CRM-side logic — see the integration methods comparison guide.
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