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SOURCES & REFERENCES

Where our information comes from

Every outside source used on this prototype is listed here (Chicago author-date style, accessed 12 October 2026).

Case studies researched

Snupit

Snupit. 2017. "How South Africa's top online portal Snupit works." Press release, 3 August. pressoffice.mg.co.za. Used for: how a South African service marketplace charges professionals (pay-per-lead) while customers use it free.

Kandua

Kandua. 2021. "Kandua two pager." Africa's Business Heroes / BFA Global. bfaglobal.com. Used for: the home-services problem for small providers and the "free for customers, small fee for pros" model.

Data and parameters

VAT rate (15%)

South African Revenue Service (SARS). Value-Added Tax. Used for the VAT rate t = 15%.

Group survey (Figure 1)

Short survey of 10 plumbers in Soshanguve and Mamelodi, collected by the KasiLink SA group (in person and by WhatsApp).

Projection (Figure 2)

Figure 2 is the group's own growth projection for the first six months. It is an estimate, not measured data.

Price check (Figure 3)

Informal price check of five competing channels, recorded in the Mathematics Appendix.

Security, privacy and AI use

Demo data

Plumber names, phone numbers and emails on this site are demonstration data. Please do not enter real passwords or ID numbers. Contact messages are only readable by an administrator.

AI assistant

The chat assistant is rule-based: it answers only from KasiLink SA's own service, price and plumber data and does not call an external AI service.

AI tools used to build this project

The group used an AI assistant to help fix and improve the Java and website code. The group reviewed the changes and can explain them.