The verdict in three sentences
A B2B marketplace in Sandton has to convince two audiences at once, corporate buyers and the suppliers who list on the platform, plus investors and future hires, so the choice of provider depends on how much strategy work that dual message still needs. If you are still working out positioning with the founders every week, a Sandton or Rosebank agency you can meet in person is the better option. If the positioning is settled and the job is to ship two clear journeys, an investor page and a careers page in 3 to 4 weeks at a fixed price (USD 2,900, 4,900 or 8,900 with Kolonell), a remote studio is enough.
What makes a marketplace site harder than a single-product site?
Johannesburg's startup scene, from Sandton's corporate towers to Rosebank and the Braamfontein tech precincts, leans towards fintech, insurtech and B2B SaaS selling to banks, insurers and large corporates. A B2B marketplace sits in the middle of that: procurement teams want proof of vetting and reliability, while suppliers want to know what it costs them to join and how fast they get paid. Note that the marketing site and the marketplace platform are two different projects: the platform is a custom application, on quote, and should not be bundled into a website brief by accident.
| Audience | What they look for | Key page | Conversion action | Scope with Kolonell |
|---|---|---|---|---|
| Corporate buyers | Vetting process, categories, service levels | Buyer landing page | Book a demo | Included |
| Suppliers | Fees, payout timing, onboarding steps | Supplier landing page | Apply to list | Form included, document upload on quote |
| Procurement and legal | Terms, data handling, references | Trust and compliance page | Download summary | Included |
| Investors | Model, team, press | Investor and press page | Contact founders | Included |
| Candidates | Roles, culture | Careers page | Apply | Page included, job board integration on quote |
| Integrators | API, catalog feeds | Developer docs | Request access | On quote |
Which provider fits which situation?
Instead of a single score, match your current situation to the row that describes it best.
| Your situation in 2026 | Better fit | Why |
|---|---|---|
| Positioning still debated between founders | Local agency | Weekly workshops in a room shorten the debate |
| Board wants a supplier it can meet in Sandton | Local agency | Governance comfort has real value at this stage |
| Brand and message validated with first customers | Remote studio | Fixed scope, launch in 3 to 4 weeks |
| Supplier recruitment campaign starts next month | Remote studio | Speed and a CMS the team edits matter most |
| Weekly campaign pages for both audiences | Local agency on retainer | Ongoing design capacity, typically ZAR 20,000 to 70,000 a month |
| In-house designer planned within a year | Remote studio with clean handover | Figma, components and CMS documented for the hire |
Retainer figures are a 2026 ballpark from typical agency quotes in Johannesburg, roughly USD 1,100 to 3,900 a month at about ZAR 18 per USD. Kolonell's project manager works on GMT, two hours behind SAST, and is reachable during your working day.
When is a local agency clearly the better choice?
Be honest about it. A funded startup moving fast may genuinely prefer an agency it can meet every Tuesday in Sandton, especially when the founders disagree on whether to lead with the buyer or the supplier story. A local team also knows how South African procurement departments read a vendor site, and can join a pitch to a bank's innovation team if needed. If you expect to rewrite the homepage every month for the next year, a retainer will serve you better than a fixed project. A remote studio makes sense once that debate is over and execution is the bottleneck.
What does each route cost over three years?
Build prices are a 2026 ballpark from typical agency and freelancer quotes in Johannesburg. Care after launch is a market assumption of about USD 150 a month (USD 100 for a freelancer), never a Kolonell price: Kolonell includes 3 months of support, then maintenance is on quote.
| Route | Year 1 | Year 2 | Year 3 | 3-year total |
|---|---|---|---|---|
| Sandton agency, build ZAR 250,000 (≈ USD 13,900) | USD 15,700 | USD 1,800 | USD 1,800 | ≈ USD 19,300 |
| Freelancer, build ZAR 90,000 (≈ USD 5,000) | USD 6,200 | USD 1,200 | USD 1,200 | ≈ USD 8,600 |
| Kolonell Growth, USD 4,900 | USD 6,250 | USD 1,800 | USD 1,800 | ≈ USD 9,850 |
| Kolonell Premium, USD 8,900 | USD 10,250 | USD 1,800 | USD 1,800 | ≈ USD 13,850 |
Year 1 for Kolonell adds 9 months of care after the 3 included months (USD 1,350). The cheapest line is not automatically the safest: with two audiences to serve, check who will update supplier fees and buyer categories every month.
Questions to ask before you sign
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- Will the domain, hosting, repository, CMS and analytics accounts be registered to our company from the start?
- How will you structure two separate journeys without duplicating content or confusing search engines?
- How do the supplier and buyer forms collect only what is needed, record consent and support POPIA obligations, including our Information Officer's role towards the Information Regulator?
- Who reviews claims about vetting, payout speed or savings so they stay accurate? The Consumer Protection Act and general fairness rules mean marketing must not mislead.
- Do you target WCAG 2.2 AA and publish an accessibility statement?
- What exactly happens at handover if we hire an in-house designer?
This is not legal advice: your counsel should review terms, privacy notice and any claims before go-live.
Mini case study
Illustrative example: Lerato, COO of a fictional Sandton marketplace, links corporate facilities buyers with cleaning, security and maintenance suppliers. Her brand is validated with ten pilot customers, but a supplier recruitment drive starts in five weeks. A Sandton agency quotes ZAR 310,000 (≈ USD 17,200) and 12 weeks. She instead books two days of positioning workshops with a local strategist at ZAR 40,000 (≈ USD 2,200, third-party cost) and Kolonell Growth at USD 4,900, so USD 7,100 in total. The saving is about USD 10,100, and the site is live in 4 weeks instead of 12, before the recruitment drive. If the founders had still been arguing about who the primary audience was, she would have hired the agency.
FAQ
Should buyers and suppliers get separate websites?
Usually not: one domain with two clearly labelled journeys is easier to maintain and to rank. Plan at least 2 landing pages and 2 forms, which fits within the Growth tier at USD 4,900.
Is the marketplace platform itself included?
No. The platform (listings, matching, payments, payouts) is a custom application on quote. The Kolonell grid of USD 2,900 to 8,900 covers the marketing website only.
How long does a Sandton agency usually take?
Typical agency timelines run 8 to 14 weeks for a startup site with workshops. Kolonell delivers in 3 to 4 weeks once content is ready, which matters when a campaign date is fixed.
What about Afrikaans, isiZulu or other languages?
Most B2B buyers in Johannesburg read English, but a supplier audience may respond to another language. Premium at USD 8,900 is the multilingual tier, languages set in the quote; native review in a local language is a third-party cost.
How do we keep the site fresh after launch?
The CMS lets your team publish a new category page or supplier story in under an hour. Bigger changes after the 3 included months of support are on quote. Compare the tiers on the international offer page.
Let's scope your project. Send us your two audience journeys, budget range and campaign date, and we will tell you whether Growth or Premium fits. See the international offer or request a free quote: detailed reply within 48 hours.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.