R.001 / TechnologyCOMMS
§ Tech.00
Cal.com — Sovereign scheduling infrastructure
An open-source scheduling engine with granular routing, unlimited event types, and deep webhooks. Built for operations that refuse to pay a per-seat tax just to book a meeting, or surrender client data to a third party.
Unlimited
event types and routing rules
£0
per-seat scaling penalties
100%
data sovereignty for client PII
§ Tech.01Replaces
What it replaces
| SaaS | Monthly cost | Limitation |
|---|---|---|
| Calendly (Teams) | £13/user/mo | Per-seat tax, rigid routing, rented data |
| Calendly (Enterprise) | £12,000+/yr | Heavy contracts just to get SSO and audit logs |
| Acuity Scheduling | £16–£40/mo | Gated integrations, limited API access |
Run Cal.com on your own infrastructure and scale to 100 staff members without paying an extra penny for scheduling.
§ Tech.02Pipeline
How STACKD uses it
- Prospect selects a slot through a custom-branded booking flow hosted directly on your domain
- Round-robin or skill-based routing assigns the right team member automatically
- Native webhooks trigger n8n to instantly sync the meeting to your Frappe CRM
§ Tech.03Business case
Business outcomes
Wellness & Salons
Medical provider navigated complex clinician availability and automated Stripe deposits.
Saved 12–24 administrative hours per month.
Professional Services
Sales team synced meetings directly with a custom CRM via webhooks.
Zero data fragmentation, £0 scaling cost.
B2B Operations
Automated complex invoice approval scheduling via the enterprise API.
Entirely eliminated manual coordination.
§ Tech.04Systems