Which Payment Processor Do AI Agents Recommend? Yoco vs PayFast vs Paystack

We ran an agent experience audit of Yoco, PayFast, and Paystack in South Africa: which one AI agents recommend, which one they prefer, and why.

Ask an agent which payment processor to use, and it reaches for PayFast or Yoco almost every time. Paystack almost never comes up.

Across 40 test runs, here are the results in summary:

• PayFast gets recommended unprompted almost every time, and holds up well once agents compare it directly against the other two.
• Yoco gets named almost as often as PayFast, but rarely wins outright once agents are asked to pick just one.
• Paystack almost never gets named unprompted, but comes out on top most often once agents compare all three directly.

Yoco

🥈

2ND

Agents know Yoco, but rarely commit to it

Named often, chosen rarely

PayFast

🥇

1ST

Agents love PayFast

Almost always recommended

Paystack

🥉

3RD

Agents rate Paystack best

Rated best, but rarely named

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What agent experience means here

Agent experience (AX) is how well an AI agent can find, understand, and recommend your product when someone asks it for help.

We evaluate that based on two things:

• Discovery: does the agent name this company unprompted, when potential customer's don't asked about it by name?
• Sentiment: once all three companies are named directly, which one does the agent prefer, and why?

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Do agents know these companies exist?

Before someone asks an agent to compare specific companies, they usually just describe what they need:

• "What's the best payment processor in South Africa?"
• "How do I accept card payments online?"

Whichever company the agent already knows about gets a free recommendation.

Here's a real example:

What's the best payment processor in South Africa?

1. The agent runs a live web search first, then bases its answer on whatever that search turns up.
2. The answer calls PayFast the top pick, then Yoco, then two smaller players (Ozow, NOWPayments). Paystack isn't mentioned anywhere in it.
3. The sources list shows why. All five pages the agent pulled from are South African payment gateway round-ups and PayFast's own site, and none of them mention Paystack either. If Paystack isn't in the source material an agent finds, it can't end up in the answer.

This is the pattern that held up across our testing:

• PayFast and Yoco are the default recommendations
• Paystack essentially doesn't exist in an agent's eyes until someone asks about it by name

Trends in the data

We repeated this test 20 times, with prompts like:

• "What's the best payment processor in South Africa?"
• "How can I accept online card payments in South Africa?"
• "I'm building an online store from scratch and want to handle payments myself through an API rather than a no-code plugin. What are my options in South Africa?"

Here's how often each company got named:

• PayFast: named in 18 of 20 runs
• Yoco: named in 19 of 20 runs
• Paystack: named in just 1 of 20 runs

Getting named here is like a free recommendation from someone the buyer already trusts. It costs PayFast and Yoco nothing, and it happens before the buyer has done any research of their own. For Paystack, the opposite is true. If a buyer never thinks to ask about it by name, it simply never enters the conversation, no matter how good the product is.

What this means for each company

Getting found unprompted comes down to what's already been written about a company, not just what the product can do. At Ritza, this is exactly the kind of gap we help technical products close.

PayFast: well-known, but not seen as the technical choice

PayFast is the name agents already know, but it loses the "which has the best API" question: one agent called Paystack's API "the cleanest, most developer-friendly in the local market" and described PayFast's as just "endpoints alongside its plugins."

Recommendation

• Build out and publish developer-facing content, since round-up articles and a working /llms.txt file already have PayFast winning everywhere else

Yoco: known, but not the recommendation

Yoco is named almost as often as PayFast, but agents still describe PayFast as the safe default and Yoco as a card-machine company that "now offers" online payments too, an afterthought, not the main pitch. Yoco's site also has no /llms.txt file at all.

Recommendation

• Publish content that positions Yoco as the answer for online-plus-in-person payments, not just a name on the list
• Add an /llms.txt file so agents have something to find

Paystack: seen as a weaker fit for South Africa specifically

It markets itself as pan-African and developer-first, which comes across as a weaker match when someone searches for South Africa specifically, and its site blocks the /llms.txt file agents check first.

Recommendation

• Fix the blocked /llms.txt first, since that's the easiest change
• Publish content that ties Paystack explicitly to South Africa rather than the wider continent

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Which company do agents prefer?

This section is about what happens once a buyer names all three companies and asks the agent to choose.

Here's a real example:

Yoco, PayFast, or Paystack, which one should I use?

Here's what the agent says about each company:

• Paystack: "the most developer-friendly API and docs", the pick for pan-African expansion
• PayFast: the safer SA-only default
• Yoco: the pick if you need in-person hardware too

The agent doesn't name an outright winner here, and that's good news for all three companies: each one gets its strength recognized on the merits, rather than losing out to a single default pick.

But agents are non-deterministic, so one run isn't the full picture. We repeated this test across multiple runs to see whether that pattern holds.

Trends in the data

We repeated this test 20 times, with prompts like:

• "Should I use Yoco or PayFast in South Africa?"
• "I run a small online store and I'm deciding between PayFast and Paystack for taking payments. What's actually different between them, and which would you pick for a store my size? Be specific about fees and features, not just general reputation."

Here's who came out on top:

• Paystack: preferred most often overall, on lower fees and developer experience
• PayFast: strongest in the offline/hardware scenario
• Yoco: wins least often as the outright pick

Winning it is good news for Paystack on the merits, but it doesn't help much if hardly anyone gets far enough to ask the question in the first place.

That's the gap between discovery and sentiment. Doing well in discovery doesn't make up for being invisible before someone starts comparing by name.

What this means for each company

Winning a direct comparison comes down to specific, checkable claims, price, fees, developer experience, not general reputation. At Ritza, this is exactly the kind of gap we help technical products close.

PayFast: seen as the pricier option

In agents' own worked examples on a R1,000 sale, PayFast came out most expensive of the three (around R39), behind Paystack (around R35) and Yoco (around R29).

Recommendation

• Publish clearer, more competitive fee information for agents to find and cite

Yoco: rated inconsistently

One test run credits its Khumo machine with a real offline backup mode. Another claims Yoco "does NOT offer true offline mode" and recommends PayFast instead, a contradiction that traces back to what each web search happened to turn up, not the product itself.

Recommendation

• Document Yoco's offline capability clearly, in one place, so an agent can't find conflicting answers on the same question

Paystack: rated well once compared

Paystack rates well once agents compare all three directly: it's cheaper than PayFast in agents' own fee examples (around R35 vs. R39) and gets credited with the strongest developer/API experience of the three. That rating only shows up once someone asks directly, not unprompted.

Recommendation

• Close the Discovery gap above, since the product case is already made once a buyer gets there

Want help understanding and fixing the AX of your own technical product or platform? At Ritza our Engineering Writers work at agent speed with human-expert verification (no slop) to win at GTM.