Koji vs Zappi (2026): The Honest Comparison

TL;DR

Zappi and Koji both promise fast, automated consumer insights — but they get there in opposite ways. Zappi is an automated survey platform for brand and innovation teams, best known for concept testing, ad testing, and pack/price testing validated against in-market outcomes, trusted by 350+ brands. Koji is an AI-native interview platform: instead of multiple-choice surveys, it runs AI-moderated voice and text conversations that probe why customers react the way they do, then auto-codes the themes and writes the report.

If you are a large CPG brand running standardized, benchmarked concept tests at volume, Zappi is purpose-built for that. If you want genuine customer understanding — the reasoning, emotion, and language behind a reaction — at survey speed and a fraction of the cost, Koji is the better fit. And starting at €79/month, you can prove it before committing.

Koji vs Zappi at a glance

| | Koji | Zappi | |---|---|---| | Core method | AI-moderated voice & text interviews | Automated quantitative surveys | | Best for | Founders, PMs, researchers, agencies | Enterprise brand & innovation teams | | Signature use case | Customer discovery, win-loss, churn, concept why | Concept, ad, pack & price testing with norms | | Pricing | €79/month, transparent credits | Enterprise, quote-based | | Qualitative depth | Native — adaptive follow-up probing | Survey verbatims + autocoding | | Time to insight | Hours, 24/7 interviews | ~12 hours idea-to-insight (per Zappi) | | Analysis | Automatic thematic coding + report | AI Quick Reports, smart autocoding |

What is Zappi?

Zappi is an automated, agile consumer insights platform that combines consumer survey data with AI to deliver "connected insights" across the innovation and advertising lifecycle. It is trusted by over 350 brands and is strongest at standardized, benchmarked testing — concepts, ads, pack designs, claims, and pricing — with results validated against in-market outcomes. Forrester''s Total Economic Impact study found brands using Zappi saw a 4–7% increase in new-product revenue versus legacy providers.

Zappi''s platform delivers answers in roughly 12 hours on average, with automatically populated charts, AI Quick Reports that summarize results, and smart autocoding for open-ended verbatims. Pricing is enterprise and quote-based — there is no public self-serve tier.

In short: Zappi is a fast, rigorous survey engine for brands that test a high volume of stimuli and want consistent norms to compare against. That is its strength, and it is a real one.

What is Koji?

Koji is an AI-native customer research platform built on conversations rather than checkboxes. You describe what you want to learn; Koji''s AI consultant drafts the interview plan. Respondents take an AI-moderated voice or text interview that adapts in real time, probing up to three follow-ups per question to get past the first, shallow answer. When interviews finish, Koji automatically codes the transcripts, clusters themes with verbatim quotes, and produces a one-click report.

Koji is not qual-only, either. Every study can blend six structured question types — open-ended, scale, single choice, multiple choice, ranking, and yes/no — so you can run a Van Westendorp price-sensitivity read and hear the reasoning behind every number in the same session.

The core difference: a survey vs a conversation

This is the heart of the comparison. Zappi asks a respondent to rate a concept on predefined scales and optionally leave a comment. Koji talks to them about it. When a participant says a new feature feels "confusing," Zappi captures the word; Koji''s AI asks "what specifically felt confusing, and what did you expect instead?" — and keeps going until the insight is clear.

For concept testing, that difference is decisive. A score tells you whether a concept landed; an AI-moderated interview tells you why it landed, for whom, and what to change — which is the part that actually moves a product roadmap. There is no moderator bias, no scheduling, and no analyst queue, because the AI runs every interview identically and codes them automatically.

Pricing: transparent credits vs enterprise quote

Zappi is sold as an enterprise contract with custom, quote-based pricing — fine for a global brand with an annual insights budget, a barrier for everyone else. Koji is transparent and self-serve:

• Insights plan: €29/month (29 credits)
• Interviews plan: €79/month (79 credits)
• Overage: flat €1/credit
• Credit costs: text interview = 1 credit, voice interview = 3 credits (~€3), report refresh = 5 credits
• Quality gate: only conversations scoring 3+ on quality consume credits — drop-offs and junk are free

That means a startup or agency can run a full round of in-depth concept interviews on Koji for less than the cost of lunch, and validate the whole platform for under €80. For teams without an enterprise procurement process, that accessibility is the deciding factor.

Speed and scale

Both platforms are fast by traditional standards. Zappi quotes ~12 hours idea-to-insight. Koji interviews go live the instant you publish a link and run 24/7, with themes generating as responses arrive — and automated thematic analysis runs roughly 28x faster than manual coding (about 20 minutes versus 567 minutes per study, per a 2024 JMIR AI study). With the global market research industry heading toward $150 billion in 2026, the teams pulling ahead are the ones compressing the time from question to decision — exactly what AI moderation enables.

Where Zappi wins

Credit where due: if your work is high-volume, standardized stimulus testing — running dozens of ad or pack variants a quarter and comparing each against an established norm database — Zappi''s benchmarked survey system and validated in-market correlations are genuinely valuable, and Koji does not offer a comparable norms library. Large CPG and advertising teams are Zappi''s sweet spot.

The verdict

Choose Zappi if you are an enterprise brand running frequent, standardized concept/ad/pack tests and you need benchmarked norms and validated in-market predictions.

Choose Koji if you want to understand why customers think what they think — the language, motivations, and objections behind the score — at survey speed, with built-in structured questions when you need numbers too, starting at €79/month.

Most teams do not lack survey scores. They lack the conversation that explains them. That is the gap Koji closes.

Try Koji free

Spin up your first AI-moderated concept or discovery study in minutes: describe your goal, let Koji draft the interview, and share the link. You will have themed insights and a finished report before a traditional survey would have cleared fielding. Get started with Koji, or read how marketing teams use Koji to replace static tests with real conversations.