Product / Analysis
Mopinion, Lyssna, Dovetail and PostHog all promise to tell you what your customers think. They just disagree, deeply, on how to find out.
Every product team says it is customer-obsessed. Then it opens a purchase order, and the tool it picks tells you what it actually believes. Buy a feedback widget and you believe customers will tell you the truth if you ask nicely. Buy an analytics platform and you believe they never will. Four companies - Mopinion, Lyssna, Dovetail and PostHog - have built real businesses on four different answers to the same stubborn question: how do you know what a user wants before they leave?
None of them is a household name. Together they map the whole territory of a discipline that most people outside product teams have never heard named. Call it the user feedback stack. The pitch is always some version of "understand your customers." The interesting part is the argument underneath, because these four don't agree on what understanding even means.
Where the whole category lives
Start with the oldest problem in research: people are unreliable narrators of their own behavior. Ask someone whether they'd use a feature and they'll say yes to be polite. Watch them, and they never click it. This is the say-do gap, and it is the fault line the entire category is built along. Every tool here is a bet on which side of that gap holds the truth.
Illustrative. Where each product puts its trust - stated opinion vs. observed behavior.
Draw the map and four camps fall out cleanly. One asks users directly, on the page, in the moment. One puts them through a controlled test before anything ships. One files away everything the company has ever learned so it can be found again. And one ignores the interview entirely and just measures what fingers do on screens. Ask, test, store, watch.
On-site and in-app feedback. Catches the complaint at the moment it happens - the survey that pops up when a checkout breaks.
Usability testing with a rented panel. Validates a design against strangers before it reaches a single real customer.
A research repository. Keeps interviews, notes and clips searchable so hard-won insight doesn't die in a Slack thread.
Product analytics and session replay. Skips the interview and measures behavior - clicks, drop-offs, the features nobody uses.
Founded 2013, Rotterdam
Mopinion is the most traditional of the four, and the most European. Founded in Rotterdam in 2013, it sits in the category the industry calls voice of the customer - the little feedback forms and rating widgets that surface on websites, in apps and inside emails. Its customer list read like a directory of large European brands: KLM, Vodafone, Calvin Klein, Allianz, ENGIE. The value is immediacy. When a booking flow breaks, Mopinion is the thing that quietly asks the frustrated user what went wrong while they still remember.
In September 2025 Mopinion agreed to be acquired by Netigate, a larger European experience-management player, folding voice-of-the-customer feedback into a broader suite. That's the pattern for the "ask" camp: valuable, mature, and increasingly bundled into something bigger.
A survey tells you what people will admit. A session replay shows you what they'll deny.The two disciplines, in one line
Founded 2008 as UsabilityHub
Lyssna is the elder statesman here, running remote usability tests since 2008 under its old name, UsabilityHub. It rebranded to Lyssna - Swedish for "listen" - and leaned into a simple promise: get real reactions to a design in minutes, not weeks. Its most famous format is the five-second test, which shows a participant a screenshot for exactly five seconds and then asks what they remember. It is, effectively, a lie detector for first impressions.
The moat is the panel. Lyssna advertises access to more than 690,000 participants and says it is trusted by over 320,000 designers, researchers and product leaders. That panel is the hard part to copy - anyone can build a testing interface, but recruiting hundreds of thousands of people willing to click through your prototype is a decade of work. The "test" camp sits between saying and doing: participants act, but inside a task you designed, which is not quite the same as the wild.
Founded 2017, Sydney
Dovetail solved a problem that sounds too boring to fund: companies keep learning the same things about their customers and then forgetting them. Founded in Sydney in 2017 by Benjamin Humphrey and Bradley Ayers, it popularized the "research repository" - a searchable home for interview transcripts, survey results, notes and video clips, so an insight discovered in March can still be found in November.
Boring turned out to be a moat. In 2022 Dovetail raised a $63M Series A led by Accel at a valuation north of $700 million, and it now counts more than 2,600 customers including Atlassian, Canva, Shopify, Porsche and Starbucks. The insight is easy; the remembering is hard. Dovetail built a company on the remembering, and has since bent hard toward AI to auto-summarize the growing pile.
The insight is easy. The remembering is hard.Why a filing cabinet became a $700M company
Founded 2020, open source
PostHog is the contrarian, and it is winning the growth race. Founded in 2020 by James Hawkins and Tim Glaser, it launched as open-source product analytics with a developer-first pitch: cut analytics setup from weeks to a single day. It has since sprawled into an all-in-one platform - event capture, session replay, feature flags, A/B tests and, yes, surveys - so a team can watch behavior and ask questions from the same tool.
The philosophy is the opposite of Mopinion's. Don't ask what users want; measure what they do, then argue with the numbers. Investors have rewarded it. PostHog raised a Series B early, took a $70M Series D led by Stripe in 2024 at roughly $920 million, and by October 2025 closed a $75M Series E at a $1.4 billion valuation, for around $182M raised in total. Being open source is part of the trick: you can read the exact code that decides what counts as a user "event," which for a developer audience is a form of trust nobody else offers.
The honest answer
None of them, alone. That's the quiet lesson buried in a landscape that looks like four competitors. They aren't really fighting over the same seat - they're fighting over the same meeting. A survey catches the complaint. A usability test kills the bad design before launch. A repository keeps the lesson from being relearned. Analytics tells you whether any of it mattered once real users showed up.
The mature product teams run more than one, because each tool is strongest exactly where another is blind. Mopinion hears the angry user but can't tell you if they're representative. PostHog sees the drop-off but can't tell you why. Lyssna gets you a clean answer to a question you designed, which is only as good as the question. Dovetail remembers everything and decides nothing. Put together, they close the say-do gap from both ends - and the companies that reach for only one of them tend to be very confident about customers they've only half heard.
The market seems to agree the category matters, even as it reshuffles who owns it. Mopinion got absorbed into a bigger suite. Dovetail bet the repository on AI. PostHog keeps stacking tools until "analytics company" stops describing it. Four verbs, four founding eras, one meeting they all want to be in.
All four help companies understand their users, but they attack it differently: Mopinion collects on-site feedback, Lyssna runs usability tests with a participant panel, Dovetail stores and analyzes research, and PostHog measures actual product behavior.
Feedback tools like Mopinion capture what users say - survey answers, ratings, comments. Analytics tools like PostHog capture what users do - clicks, sessions, drop-offs. The two often disagree, which is exactly why teams use both.
It's a searchable home for everything a company learns about its customers - interview transcripts, survey results, notes and clips - so insights can be found again instead of lost. Dovetail helped define the category.
Yes. PostHog started as an open-source product analytics platform in 2020 and still offers a self-hostable version alongside its cloud product, which spans analytics, session replay, feature flags, A/B tests and surveys.
It depends on the question. Use on-page feedback to hear complaints as they happen, usability testing to validate a design before launch, a repository to keep insights alive over time, and analytics to see what people actually do. Most mature teams run more than one.