Comparison
Centercode vs. Synthetic-only
Synthetic-only tools help you try ideas on participants an AI generates. Centercode has AI participants too, beside real people, then goes on to betas, bug reports, and products that show it works.
Synthetic-only tools are built to answer your questions with participants an AI generates. Most of the tools we read say a study needs no recruiting, comes back in minutes or hours, and lets you try an idea, a message, or a price on many kinds of audience before you spend. They come in several shapes: simulated surveys, interviews, focus groups, chats with one generated participant, and models of whole populations. In the tools we read, every answer comes from a participant an AI generates. Centercode’s UserVolley has AI participants too, beside real people who stay the source of truth, then keeps going with betas, communities with no end date, issues reported as people use your product, physical products shipped and tracked, and your own agent to help run any of them.
We make UserVolley. What we say about synthetic-only tools comes from a sample of their public pages, with the date shown. We name none of the tools we read, and we will share the pages behind any answer.

What AI changed
Building got easy.Two things didn’t change.
You can build almost anything now, and fast. You still have to build the right thing, and it still has to work. Both just got harder, with less time to find out.
Build what matters
Know what your people need, before and while you build.
Hear from your own people, and turn what they say into insights ranked by impact before and while you build.
This is their core: most of the tools we read say you can try ideas, messages, prices, and designs on generated participants in minutes or hours, before you build or spend.
Know it works
Know it holds up in real hands before your customers find out.
Run betas, collect bug reports, and put connected products in real homes for weeks, all in the same program.
Some of the tools we read say generated participants can look at a website, mockup, design, or screens, but we found no feature at any of them for collecting bug reports, checking release readiness, or running a beta with real people. Some publish articles on beta and acceptance testing, and one lists beta testing and technical quality assurance as work that still needs real users.
What synthetic-only tools are built for comes from a sample of their public pages, read on October 31, 2026.
The big difference
Why do people take part in your study?
Centercode
Real people, with AI participants beside them.
Your own customers, and Betabound, our global tester community, are real people who use your product and tell you what happened, and their own words stay as the evidence. UserVolley can add AI participants to try an idea or a design early. They never raise the confidence shown on a project’s results, which comes only from what real people said and did.
Synthetic-only tools
In the tools we read, every participant is generated by an AI.
In the tools we read, an AI generates every participant from a description of your audience, and in most of them from your own survey or customer data too. A generated participant is a model’s output, not a person who took part. Most of the tools we read say they build or check their participants against data about real people, such as surveys, interviews, or public posts, but those people are not the ones answering your questions. Most of the tools we read say real people are still needed for some decisions.
What synthetic-only tools say comes from a sample of their public pages, read on October 31, 2026.
Our view is that AI participants are a fast way to explore and real people are the source of truth, so in UserVolley the confidence shown on a project’s results comes only from what real people said and did. That is a choice about our own product, not a measure of how accurate generated answers are, and this page makes no claim about that.
Feature by feature
Centercode and synthetic-only tools, side by side.
Centercode’s answers describe UserVolley. Answers for synthetic-only tools were read from a sample of their public pages on October 31, 2026. Yes means most of the tools we read offer it, Partly means some do, and No means none did. Every participant in them is generated, so what needs real people is a No, and where a tool has something close, the answer says what it is. Our research studios (video, sessions, AI interviews, and trade-off studies) come in set numbers with each edition.
- 41Yes
- 7Partly
- 0No
- 5Yes
- 23Partly
- 20No
Three kinds of project, one place
Reach the right people
Ways to take part
Real people and AI participants
From feedback to decision
Your own agent
Connected hardware and long-term adoption
Managed services
Enterprise-ready
Managed services
Want a team to run it for you?
Centercode
Our team can run the whole thing.
Our in-house team can take your project from planning to wrap-up. They are US-based Centercode employees who have run betas, product tests, and research programs for years. You watch it all happen in your own program, and everything we build stays with you.
- Plans the project and builds its surveys, tasks, and screeners
- Recruits, screens, and looks after your participants
- Runs it day to day and keeps people engaged
- Reviews and curates the feedback, and is accountable for every result
- Coordinates rewards, codes, and shipments
- Gets product to participants and manages returns
- One project, or an annual program across releases
Rewards and postage bill to your program’s own connected accounts, with no markup. When our team handles custom logistics for physical products, that is quoted for each program. We take on whole projects. The one task we also take inside a project you run yourself is choosing the participants.
Synthetic-only tools
Mostly software you run yourself, with a team to build audiences and, at some, run whole studies.
Most of the tools we read are software your own team logs into to question generated participants, and most also say a team of theirs will build an audience or model from your own data. Some say their team runs the whole study and presents the results. Most mention onboarding or support, and some keep a named contact, round-the-clock support, or dedicated onboarding for a higher plan or a quoted deal. Some are bought by booking a demo or sending a request, with custom work scoped and quoted with you, while others let you start with a free account or trial.
- Studies run for you: some of the tools we read say their team runs the research and presents the results, one describing a service from designing the research through help putting the findings into action, and another scoping a first project around one decision and running it. Another’s case studies describe its team building the audience and running the tests with the customer
- Audiences and models built for you: most of the tools we read say their team will build an audience, model, or simulation from your own survey data, research archives, or specifications, and some say they check it against your earlier survey results. Some keep this for a higher plan or a quoted add-on
- Onboarding and support: most of the tools we read mention a walkthrough, an onboarding call, a working session, or a support inbox. Some keep a named contact, round-the-clock support, priority support, or dedicated onboarding for a higher plan or a quoted deal, and one sells training sessions as a quoted extra
- How it is bought: some of the tools we read are bought by booking a demo or sending a request, and some describe a written order for team-run engagements, one calling it a statement of work. Others let you start yourself with a free account or trial and send custom work to a conversation with sales
- Real people and private ideas: most of the tools we read say results are best checked with real people, and some say unreleased ideas stay private because they are not shown to an outside panel. One says it keeps non-disclosure agreements (NDAs) with its managed clients. One case study describes a real survey run through an outside panel partner
We found no page on the sites of the tools we read that offers to ship your product or device to people, track it, or arrange its return. Some say physical and sensory questions, such as taste, touch, packaging, and using a device, need real people.
What synthetic-only tools offer as services is described from a sample of their public pages, read on October 31, 2026.
Strengths
What each one does well.
What Centercode does well
AI participants, with real people beside them
Skilled AI experts and market personas complete surveys and tasks, and digital twins join them, each modeled on how one of your own members behaves once they have done enough work in your program, with personal details left out. Their answers feed the same insights as everyone else’s. They run when an owner, or your own agent within the limits you set, sends them. Every edition includes a monthly allowance of AI participants that grows with the edition, and what they complete and the new insights they find use your credits, the pool you spend in UserVolley, just as any participant’s work does. Real people stay the source of truth: AI participants never raise the confidence shown on a project’s results.
Conversations with real people, and analysis that turns into decisions
Participants answer an AI moderator by speaking or typing. It follows up on what they say and returns a transcript, a summary, and findings for each objective. Surveys and trade-off studies run with the same people, and live interviews come with booking, reminders, and observers, hosted on your own meeting link. Matching feedback merges into one insight, ranked by an Impact Score (how bad it is times how often it comes up), with the original words kept as evidence. Build boards of live charts, add a tile that answers a plain-English question, and email a scheduled summary. Insights flow to Jira, Linear, GitHub, Slack, and Teams, and a public API lets other software read and send data. Our research studios (video, sessions, AI interviews, and trade-off studies) come in set numbers that grow with the edition.
A community you keep, and people beyond it
Bring your customers in by link, email list, shared key, or referral, and invite people already in your program into any project with a filter. Keep them as a community that belongs to your program across every project, with no end date. When you need people beyond them, draw on Betabound, our global tester community, where each matched participant who joins uses some of your credits, the pool you spend in UserVolley. Participants are invited for early access, a real say in what gets built, and a place to belong, and rewards are a thank-you, not the pitch.
Then know it works
Run a private or public beta to find out whether it holds up, collect bug reports as people use your product, and ship kits with carrier tracking and optional return labels. Your own agent helps run the project, and its messages to participants, and any rewards, codes, or shipments it hands out, wait for an owner.
What synthetic-only tools do well
Trying ideas early, with nobody to recruit
Most of the tools we read say a study needs no recruiting, and several add that nothing needs scheduling. Most say you can try an idea, a message, a price, or a design on generated participants before you spend on building or on research with people. It suits product, marketing, and brand teams with questions to try early and often. Some are bought through plans you start yourself, with a free trial, a pay-as-you-go balance, or a monthly allowance of questions or credits. Others start with a demo and an annual agreement, a proposal, or a scoped first project.
Whole populations and many audiences at once
Some of the tools we read say they model whole populations of customers, employees, investors, or officials, run very large numbers of generated participants at once, and let you change one condition, such as a price, a rival’s move, or an announcement, then compare how different groups respond. Some say you can ask the same audience again and again, and reach audiences that are hard to recruit, such as senior executives or specialists. It suits strategy, brand, communications, and insights teams making large decisions. Those that lead with this start with a demo, a contact form, or an account sign-up, and we found no public plan names or limits for them.
Conversations, reports, and connections
Several of the tools we read say you can interview a generated participant one to one, put several in a group discussion, ask follow-up questions, and get a report with charts and quotes you can export to files or slides. Several add an API (a way for other software to read from and write to the tool) or connections for AI assistants, and some list security certifications or a data-processing agreement. It suits research teams and agencies that must hand over a report and plug the tool into how they already work. Some keep single sign-on (logging in with a company account), custom connections, team access, or white-label reports, which carry your own branding, on their highest plan, and some list API access on each paid plan.
Choosing
Which one fits you?
Choose synthetic-only tools if…
- You want to talk with generated participants: interview one in text or by voice, or put several in a group discussion and ask follow-ups, which several of the tools we read say they do. Our AI participants complete surveys and tasks, and they do not take part in AI interviews or live sessions.
- You want to try a decision on a whole simulated population, such as a price change, a rival’s move, or an announcement, which some of the tools we read say they model for customers, employees, investors, or officials.
- You want very large runs of generated participants with nobody to recruit, which some of the tools we read say they offer, and generated answers are what you are after.
- You only need generated answers, in the shapes these tools offer, and nothing beyond them: no real people, no betas, no bug reports, no communities of your own, no products to ship.
Choose Centercode if…
- You want real people to stay the source of truth, with AI participants beside them for speed, and the confidence shown on your results built only from what real people said and did.
- You want a community of your own customers and fans, kept across every project and invited to help shape what you build, with rewards as a thank-you, and Betabound, our global tester community, when you need people beyond them.
- You run betas or early-access programs, or build connected or physical products, and want issues reported as people use the product, ranked by impact and sent to your issue tracker, with kits shipped, tracked, and returned.
- You want your own agent to help run the project, with its messages, rewards, and shipments waiting for an owner, or our own team to run the whole project, with getting products to participants and handling returns quoted for each program.
Questions
What people ask us.
What is a synthetic participant?
It is a participant generated by an AI model instead of a person. Different tools call them generated respondents, personas, simulated audiences, or digital twins, meaning a generated model of a group of people or of one person. A model produces each answer. Most of the tools we read say they build or check theirs against data about real people, such as surveys, interviews, and public records. In our own product we call them AI participants. They come as skilled experts, market personas, and digital twins modeled on how your own members behave.
Can you use Centercode alongside tools like these?
Yes. You can run a UserVolley project next to whatever you use today. We are one door for your audience, not a replacement for the rest of your tools. If a tool of this kind already gives your team quick generated answers early on, keep it, and bring real people into UserVolley for a beta, a community, or a product you ship. What you learn can be sent to your issue tracker and team chat.
Can Centercode run quick tests too?
Yes. A one-shot project is built for one clear question, such as a survey or a trade-off study. Start it from a blueprint and run it with your own members, AI participants, or people from Betabound, our global tester community, who are matched and screened first. Written answers can feed the same insights as everything else, and trade-off results sit in their own analysis beside them. Trade-off studies run in one of our research studios, which come in set numbers with each edition. Your next project can be a longer program or a community, in the same place.
Where do Centercode’s participants come from?
Real people: your own team and customers, your wider market, or Betabound, our global tester community. The community you build stays with your program across every project. AI participants join them when you send them, and real people stay the source of truth.
Are Centercode’s participants paid?
That is up to each company. We invite people with early access, a real say in what gets built, a community, and recognition. Companies can thank them with rewards, such as gift cards, that the company funds. Rewards are a thank-you, not the pitch. Participants never pay to take part. AI participants are not people, so they receive no rewards.
Can AI participants replace real people?
In UserVolley they are meant to sit beside real people, not take their place. You can run a quick project on AI participants alone, such as an early read on a concept, but real people stay the source of truth: the confidence shown on a project’s results comes only from what real people said and did. AI participants add speed and scale, and their answers can feed the same insights. Most of the tools we read say something close to this about their own results: that they suit early work that points a direction rather than settling a question, and that high-stakes, regulated, or real-behavior questions still need real people. We do not rate how accurate generated answers are.
How was this comparison made?
We read the public pages of a sample of tools whose studies are answered only by generated participants: home and product pages, pricing or sign-up pages, FAQs, help and developer pages, and some articles, then looked a second time for anything we had marked as missing. We left out research platforms that run studies with real people for their customers, whether or not they also offer generated participants, and tools we could not reach. Every statement about the category is about the tools we read: most means more than half of them, several means four or more, a few means three or four, and some means two or more. What the tools say about themselves, including speed, accuracy, and fit, is reported as what they say, and we have not tested it. Where a tool’s own pages disagree, we say so or leave the detail out. The review sites we could open showed few or no written customer reviews of tools of this kind, and some review sites would not open for us, so this page summarizes no reviews. This page names none of the tools we read. Ask us for the page behind any statement.
This page names none of the tools we read. It describes a kind of tool from a sample of public pages, and Centercode is not affiliated with any of them. This is our own comparison, not an independent review. It compares public information as of October 31, 2026. Products change. If something here is out of date, or you would like the page behind an answer, tell us and we will fix it.
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