Koji vs UserInterviews: AI Research Platform vs Recruitment Tool (2026)

If you're comparing Koji and UserInterviews.com, here's the short answer: they're not really competing for the same job. UserInterviews is a participant recruitment platform — it helps you find and pay research participants. Koji is an end-to-end AI research platform — it designs your study, conducts AI-moderated voice and text interviews, and automatically analyzes results.

That said, teams regularly consider both when building their research stack, and the choice between a specialized recruitment tool versus an all-in-one platform has real consequences for how quickly you can run research. This guide breaks it down honestly.

Quick Comparison

| Feature | Koji | UserInterviews | |---------|------|----------------| | Participant recruitment | ❌ Bring your own | ✅ 6M+ participant panel | | AI-moderated interviews | ✅ Voice + text | ❌ Not available | | Automated analysis & themes | ✅ Automatic | ❌ Not available | | Research brief design | ✅ AI-guided | ❌ Not available | | Report generation | ✅ One-click reports | ❌ Not available | | Panel/CRM for your own users | ❌ | ✅ Research Hub | | Screener surveys | ✅ Via study setup | ✅ Advanced screeners | | Incentive management | ❌ | ✅ Automated payouts | | Starting price | €99/mo | ~$49/session | | Acquired by | Independent | UserTesting (Jan 2026) |

What UserInterviews Does (And Doesn't Do)

UserInterviews.com built its reputation on one thing: connecting researchers with participants. With a panel of over 6 million people, it's one of the largest participant recruitment networks in the research industry. You set screener criteria, pick your timeline, and they source qualified participants for your study.

What UserInterviews doesn't do is run the research itself. Once you have participants scheduled, you need another tool entirely — Zoom for the interview, Dovetail or Marvin for analysis, Notion or Confluence to store insights. The study design, moderation, transcription, synthesis, and reporting all happen elsewhere.

This fragmentation is a real cost. Research consistently shows the typical research project involves 4+ separate tools, and coordination overhead eats a significant portion of researcher time. Teams end up spending more energy wrangling software than talking to customers.

Important note for 2026: UserInterviews was acquired by UserTesting in January 2026. While it continues to operate independently, the long-term product roadmap is now tied to UserTesting's strategy. Teams building their research infrastructure should factor this uncertainty into any long-term commitment.

Where UserInterviews Shines

When you need access to a large, diverse participant pool quickly — especially for consumer research — UserInterviews is genuinely good at its job. The Research Hub feature also solves a real problem: managing your own customer panel with automated scheduling, screeners, and payment. If you're regularly running research with your own users and want to streamline logistics, Hub CRM is worth evaluating.

Where UserInterviews Falls Short

UserInterviews is a logistics platform, not a research platform. It schedules participants; it doesn't help you design better studies, ask better questions, or make sense of what participants told you. For teams that need rapid insight generation — not just participant scheduling — that gap matters enormously.

At approximately $49 per session (more for niche B2B profiles), costs can climb quickly. Running 20 interviews across two rounds of research can easily reach $2,000–$4,000 in participant fees alone, before you've paid for the tool you use to actually conduct the research.

Recent reviews on G2 and Capterra also note that the platform's UX has become unnecessarily complicated following a recent overhaul, with participants reporting acceptance rates as low as 3–4% and concerns about non-payment following completed sessions. These operational issues are worth factoring into your evaluation.

What Koji Does

Koji is built on a different premise: the entire research workflow should happen in one place, with AI doing the heavy lifting at every stage.

You start by working with an AI consultant to design your research brief — defining your objectives, target audience, and question strategy. The AI helps you write better questions and avoid common research design mistakes like leading questions, double-barreled questions, and confirmation bias.

Then Koji's AI interviewer conducts the actual sessions. Participants click a link and either type responses or have a natural voice conversation with the AI. Unlike a static survey, the AI probes for deeper answers, asks follow-up questions, and adapts based on what participants say. According to Maze's 2026 Future of User Research report, 66% of research teams reported increased demand for their work — AI moderation is how lean teams keep up without proportionally growing headcount.

After interviews are complete, Koji automatically surfaces themes, sentiment patterns, and key insights across all conversations. There's no manual coding, no affinity mapping sessions. You generate a shareable report with one click.

What Koji Doesn't Have

Koji doesn't include a participant recruitment marketplace. You need to source your own participants — through your own customer base, a CRM, or a separate recruitment tool. For teams that don't have an existing user base or that need access to a specific demographic panel, this is a real limitation to plan around.

The Real Question: Platform Consolidation vs. Best-of-Breed

The choice between Koji and UserInterviews isn't "which is better?" — it's whether you want a consolidated platform or a best-of-breed stack.

Best-of-breed stack: UserInterviews (recruitment) + Zoom or Lookback (sessions) + Otter.ai or Fireflies (transcription) + Dovetail or Marvin (analysis) + your reporting tool. You get specialized capabilities at each layer, but 4–5 tools to manage, export from, and stitch together.

Consolidated platform: Koji for everything from study design through report. You bring your participants or source them separately; Koji handles every other step. One tool, one interface, automatic analysis.

Research teams consistently report that coordination overhead — not insight quality — is the biggest constraint on research velocity. If your team spends a significant portion of project time on tool switching and data export rather than actual research, consolidation pays for itself quickly.

When to Choose Each

Choose UserInterviews if:

• You need access to a large consumer or B2B participant panel and don't have your own users to recruit
• You're already running moderated research with tools you're happy with and just need better participant sourcing
• Your team specializes in high-touch, human-moderated sessions where AI moderation isn't the right fit

Choose Koji if:

• You want to run research faster without assembling a multi-tool stack
• You need AI to conduct and analyze interviews so researchers can focus on strategy, not logistics
• Your research cadence is continuous — multiple studies per quarter — and manual coordination is slowing you down
• You're a small team (PM, founder, or solo researcher) who needs research capabilities without research headcount

Consider using both if:

• You need a specific demographic that UserInterviews specializes in sourcing, and you want Koji to conduct and analyze those interviews once participants are scheduled

Pricing Reality Check

UserInterviews charges approximately $49 per session for consumer participants, with B2B targeting adding $45+ per session. Running 20 interviews for a single research project costs roughly $980–$1,900 in participant fees alone — before whatever you pay for the tool conducting the sessions.

Koji starts at €99/month for full platform access including AI moderation, analysis, and reporting. Your primary cost is participant incentives, which you control directly.

The math favors Koji for teams running frequent research at scale. It favors UserInterviews for teams that run infrequent studies but need specialized participant access.

Final Take

UserInterviews and Koji operate at different layers of the research workflow. UserInterviews is a strong participant recruitment tool — but it stops the moment a scheduled participant is delivered. Everything that makes research valuable (study design, moderation, analysis, reporting) happens elsewhere.

Koji is designed for teams who want to close that gap: to move from research question to actionable insight without assembling a five-tool stack. If you're evaluating your research infrastructure in 2026, the question isn't just which recruitment tool to use — it's whether your current stack is fast enough to keep pace with the decisions your team needs to make.

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Frequently Asked Questions

Can I use UserInterviews to recruit participants for Koji studies? Yes. You can recruit participants via UserInterviews and then share your Koji study link with them. UserInterviews handles the logistics of sourcing and scheduling; Koji conducts and analyzes the interviews.

Does UserInterviews conduct user interviews? No. UserInterviews is a recruitment platform only. It sources, screens, schedules, and pays participants, but you need a separate tool — Zoom, Koji, Maze, etc. — to actually run the research sessions.

Has the UserTesting acquisition changed UserInterviews? As of early 2026, UserInterviews continues to operate independently with no mandatory changes to plans or workflows. However, its roadmap is now aligned with UserTesting's broader strategy, which may affect how the product evolves.

Does Koji have a participant panel? Not currently. Koji focuses on study design, AI moderation, and analysis. Teams source participants through their customer base, CRM, or a separate recruitment tool.

Which tool is better for B2B user research? For B2B participant sourcing, UserInterviews offers advanced targeting at premium pricing. For conducting and analyzing B2B research, Koji's AI-moderated interviews often produce more candid responses — participants tend to be more forthcoming with AI than with human moderators, especially on sensitive topics like competitive tool usage or pricing feedback.

How much does it cost to run 20 interviews with each tool? With UserInterviews on the consumer panel (~$49/session), 20 interviews costs approximately $980–$1,900 in participant fees alone, plus your research tool costs. With Koji, the platform starts at €99/month and you pay participant incentives directly, which you control based on your study design and participant source.