If you have ever searched for honest information about a PhD supervisor or a research lab, you have probably landed on RateMyProfessors and felt the disappointment of finding nothing useful there. Maybe a single review from an undergrad who took an intro course. Maybe nothing at all. Maybe a chili pepper rating.
RateMyProfessors is a good platform for what it does. But what it does is not what researchers need. And confusing the two costs people years of their lives.
This article exists to explain the difference clearly, because that difference matters more than most people realize until they are already inside a bad lab with no easy way out.
Two platforms, two completely different problems
RateMyProfessors was built in 1999 for undergraduates choosing courses. The question it answers is: is this professor engaging in a classroom setting? Will they grade fairly? Is the workload manageable? These are legitimate questions for a student picking electives.
A PhD researcher choosing a supervisor is asking something fundamentally different. Not "will this person be an interesting lecturer for sixteen weeks" but "will this person shape my career, my mental health, my publication record, my funding, my visa situation, and my daily emotional state for the next three to five years?" The stakes are incomparable. A bad professor ruins a semester. A bad supervisor can ruin years of a researcher's life.
That gap is exactly why RateYourPI exists.
Where RateMyProfessors falls short for researchers
RateMyProfessors allows anyone to leave a review. There is no verification that the reviewer ever took the class, let alone that they are a real researcher with genuine experience in a lab. This creates a real risk of spam, of reviews left by people with no direct experience, and of a signal that cannot be trusted in high-stakes decisions.
For an undergraduate choosing between two intro biology sections, that is probably fine. For a PhD student deciding whether to spend five years of their life under a particular supervisor, it is not.
RateYourPI requires verified academic affiliation before any review goes live. You must prove you are a real researcher, through an institutional email, or personal email combined with a Google Scholar or ResearchGate profile showing genuine lab experience. That friction is deliberate. We know it slows early growth. We accepted that tradeoff because the alternative, a platform full of unverified reviews about researchers' careers, would be worse than useless. It would be dangerous.
The anonymity difference
RateMyProfessors collects no verification information, which means it also offers no meaningful anonymity architecture. There is nothing to protect because there is nothing to prove.
RateYourPI verifies identity through a one-time process and then deletes the email the moment the review goes live. Not archived. Not stored in a backup table. Gone. The system is built so that if a PI, a university, or a lawyer ever contacts us demanding to know who wrote a specific review, our honest answer is: we cannot tell you, because we do not know. We designed it that way on purpose.
If a PI knows you wrote a negative review about them, they can exercise their power over you in ways that affect your career for years. That is the reality of academic power dynamics. Our anonymity architecture is not a feature. It is the foundation.
Six categories that actually matter to a researcher
RateMyProfessors rates professors on helpfulness, clarity, and a hotness rating that has become something of a joke in academic circles.
RateYourPI's six categories came from one question asked by a founder who had lived through both exceptional and damaging mentorship: what are the qualities I, as a researcher, actually look for in a mentor?
The answer was not "are they funny in lectures." It was mentorship quality, work-life balance, publication ethics, funding stability, international student support, and overall experience. Those six categories cover the entire research relationship, not a sixteen-week course. A supervisor can be a brilliant scientist and a terrible mentor. They can be generous with credit or they can quietly migrate authorship upward. They can advocate for their international students or they can use visa timelines as an unspoken form of control. None of that appears in a classroom rating. All of it appears in a RateYourPI review.
And there are two specific red flags worth naming that no generic rating system captures. A supervisor who gossips about their own team members is a serious warning sign. And a supervisor who agrees with everything you say, who never pushes back, who validates every idea uncritically, is revealing not enthusiasm but a lack of scientific grounding. Both patterns matter enormously to a researcher joining a lab. Neither shows up in a helpfulness rating.
Who RateYourPI is actually for
RateMyProfessors is primarily for undergraduates. RateYourPI is for anyone involved in research who has or has had an academic supervisor: PhD students, postdocs, research assistants, visiting researchers, anyone whose career has been shaped by the lab they chose.
The moment it matters most is the transition point. After finishing a PhD and moving into a first postdoc, a researcher often discovers for the first time that the mentorship they experienced during their PhD was not the norm. It was the exception. They had no way to know that before they signed the contract. RateYourPI is built for that moment, the moment before the commitment, when real information could still change the decision.
If it is already too late
If you are reading this from inside a difficult lab situation, RateYourPI still has value for you, in two directions.
First, you can look up other PIs in your field, find ones with strong ratings across the categories that matter to you, and reach out to explore whether a move is possible. The platform is not just a warning system. It is a discovery tool for finding better options.
Second, you can leave a review. Even if you cannot leave right now. Even if you are still in the lab. Your experience, anonymously submitted, could protect the next researcher from years of stress, anxiety, and the kind of slow professional damage that is hard to name while you are inside it but impossible to forget once you are out.
We mean that literally. You really do not know how many researchers would thank you for it. Saving someone from the wrong lab is not a small thing. It is saving them from years of a life they did not choose and could not have predicted.
The simple version
RateMyProfessors answers: is this person a good teacher?
RateYourPI answers: is this person a good mentor, an ethical scientist, a stable funding source, a genuine advocate for their students, and someone whose lab you can spend years of your life inside without losing yourself in the process?
Both questions are worth asking. They are just not the same question.
If you have worked under a supervisor worth rating, good or bad, your review is at rateyourpi.com. It takes thirty seconds. Your email is deleted the moment it goes live.