Update on 6/4: There was another Venmo conflict but Tim has acknowledged the communication breakdowns and apologized for his initial response. I'm amending this review to 3 stars to reflect this accountability. He is certainly a capable specialist and does do good quality work. Going forward I hope he will be as proactive and diligent as he was in the responses tonight. I have attached screenshots to show the new change. Seen from web version of Yelp more clearly. ========================================================== 5/30 review He tried to harass me over Venmo by ranting in the $500 comment thread 19 days after this review. 13 inane, barely coherent messages that were sent on 5/30/2025 at 1 AM. The screenshots will speak for itself. I made this update same day late afternoon. This should had been the end of this particular review: short and concise. Then mere hours after posting this update a second stream of Venmo rants began in rapid succession at 10:30 PM. This time he finally remembered me as a client when this was not so in his original statement. He sneakily revised his original rebuttal to saying he remembers me but still attempted to defame me a 2ND time. I did check this page after dinner around 8-9pm. At the time it was still the original derogatory and dismissive comment. By the time I came back to update the second Venmo rant, the comment thread had grown from the original 13 posts to the even more aggressive 87 messages. Tim. I paid you close to 5k for all the jobs done, tipped you for the work (which you acknowledged and was not part of the 5k I already counted for. +tip that would inflate the actually payment to 5.5k before Venmo because I tipped you twice for two separate jobs), got you lunch & dinner, and paid all the jobs done UPFRONT. And the $500 Venmo advance payment towards that future job for your tough time was apparently worth nothing judging by your Venmo posts. I can't say any other professionals I hired ever got this level of consideration. I did everything I could as a good client, but you were the one who chose not to act until Yelp gave you trouble. I made multiple attempts to work with you on scheduling but you did nothing. So I exercised my right as a client to post this factual, genuine review about your business practices. In response, you feigned ignorance, called me fake, and tried to ruin my credibility not just once, but twice. Then you escalated to threats and insults against me and my family members in the Venmo thread, with two separate outbursts (one in the morning and one at night). All of this: the threats, insults and mudslinging; is clearly documented in the screenshots I'm providing. Additional photos can be seen from the web version of Yelp. read more

See all

Tim is a smooth and convincing talker and sounded sincere, but once he receives your money... the real deal unfolds. Our job was unfinished and his guaranteed service hypes was all hot air. Do business as you please, but be WARNED! And that will ne my guarantee to you. He is not even worth a star... read more

Great experience. Tim was personable and knowledgeable and gave me tips on how to do the job as a DYI. We had rats but I had already trapped a few and Tim showed me how to close up the gaps to the outside and get rid of any rats that remained. read more

After trying several different providers and getting some outrageous quotes for a lot of unnecessary work, we found Tim and he was amazing. This review is long overdue but I wanted to make sure that our problem was indeed solved. Tim knows his stuff and his methods are right on. He is also extremely thorough in his work and was able to patch up certain areas the previous provider missed. Once he did his work, the mice were slowly flushed out and I think we have now caught them all as we haven't seen activity in over 3 months in our garage. The living areas have been cleared for over 9 months! read more

Tim is very nice, he looked over my house and gave valuable input about how to make it safe from the critters. He is helpful and friendly, making himself available for service but not pushy about it which I really appreciate. He is a great guy read more

Absolutely fantastic service! Our 4 story house was infested with mice, from the basement all the way to the attic. We got quotes for three different providers and settled on Rat Proof. From the very first contact, Tim was professional, friendly and clearly knowledgeable. He conducted a thorough inspection of the interior and exterior of the house, explained the mouse proofing process in detail, and provided us with a written plan that specified each step he would take to remediate the problem. This plan detailed how many times he would come onsite to work, the period of time it would take for him to remediate the problem (it took weeks and many many visits), and, most importantly, what actions he expected us to take in order to head off future infestations. Tim located and sealed every entry point into the house and made sure that the traps were strategically placed. He removed and eliminated mouse droppings around food packages, in drawers or under cabinets, cupboards, and under the sink. He located nesting material such as shredded paper and fabric, and signs of chewing on food packaging. Most importantly, Tim disinfected every surface with the appropriate disinfectant or bleach and steam cleaned or shampooed upholstered furniture and carpets with evidence of rodent exposure. We couldn't be happier with the results and highly recommend Rat Proof and Tim to anyone dealing with similar problems. Five stars all the way! read more

I have had a rat problem under my patio which is causing the patio to sink. I tried so many different ways to get them out by myself and then I tried many different exterminators for help but no one seemed to be able to give me a solution UNTIL I contacted Tim. Tim was so kind and came to my apartment despite his busy schedule and had a quick, easy, and cheap solution! Finally I have hope! I was really at the end of my rope! Not only did Tim go out of his way to help me, he is truly kind, honest, and trustworthy, which was confirmed by my dog's tail wags (and my dog is a great judge of character. ). I definitely will contact Tim in the future if I have any more rodent problems. I HIGHLY recommend! THANK YOU TIM! read more

Tim is like the rat whisperer. We tried trapping mice and rats ourselves for years before calling Tim. We're now three years rodent free!

Highly recommend working with Tim for any rodent issues! He is honest, hard working, and knowledgable. Before I worked with Tim, I contacted a national rodent service after I heard rodent movement in my walls. That company provided a very basic inspection and couldn't find anything. After that inspection, I heard more movement and even noticed a hole in my kitchen wall. That's when I reached out to Tim. He did a thorough inspection and noticed a small infestation. He put together a proposal that was fairly priced. After I accepted his proposal, he disinfected and cleaned my entire kitchen, sealed all holes, and placed mouse traps throughout my basement. His goal was to keep the mice away from my kitchen and only in the basement where all the traps are located. After two week, we caught 2 mice! He immediately came and helped me dispose of the trap. Reach out to Tim if you notice rodent activity - you won't regret it! read more

Our Complex used Tim Vialli 2 years ago with rodent infestation involving multiple units. 2 years later, rodents returned to our Complex. I have contacted Tim Vialli since 11/14/2024 through numerous phone calls and text messages but have not heard back from Tim since 11/14/2024. Tim is fantastic at what he does and reliable. We hope to hear from him soon before the rodents' condition worsens in our Complex. Tim always knows our Complex and neighborhood well so we would appreciate he can return for the job. Thank you very much. read more

On Christmas Day, we found a dead rat inside my house. We panicked. I contacted Tim who was heavily booked about our problem. Tim told me that he was very busy, but would fit us in. He came and did a thorough inspection for free. He picked up the dead rat and placed it in his vehicle. He showed us how the rats were coming into my house. The foundation of my home had rat feces. The rats were also camping under my deck. Underneath my deck was full of rat feces. The next day, Tim went to work. He thoroughly cleaned up and disinfected all the areas. He used sheet metal to prevent that rats from entering my property. He protected my deck with metal fencing. His pricing is fair and reasonable. His service is exceptional. You can be sure that I will recommend Tim to friends and family. In fact, I recommend Tim for everyone who has a rodent problem. Tim may be hard to book, but wait for him. It's better to do things right than fast! read more

See all

After discovering we had mice who had been very comfortably living in our downstairs storage room / garage, I immediately went on Yelp to find an expert. The first company I called seemed well established, but I found that I wasn't able to get many answers out of the operator whose sole job was to schedule the inspection. I kept searching and came across Rat Proof. The profile immediately made me feel like this was a trustworthy professional, and when I spoke to Tim over the phone, I was reassured that Tim was going to be my guy. Tim did not hesitate to ask me questions about my mouse problem and was quick to share his knowledge/ insight. When he came to do the inspection, he was punctual, professional and friendly. He came up with a plan right away, which included cleaning out, sanitizing and organizing all the junk in my storage room. I'm ashamed to admit it, but my storage room looked like it could have been in an episode of hoarders. But Tim came back the next day and within a matter of hours, single handedly organized and cleaned everything in that room, all by himself. I let him make the call on whatever he thought had to go into the dumpster pile, and he was incredibly thorough and thoughtful, asking me about certain items before tossing them out (because I had stored many of my kids toys/gear/clothes in that room). He even found someone who came and hauled away all that mountain of junk the very next day! I would have totally understood if Tim had told me I needed to clear that room out before he could do his job, but he happily did it as part of HIS job. I doubt there are many other pest control professionals who would roll up their sleeves and do this kind of work! Once the room was cleared, Tim set traps and helped mouse proof holes he found around the garage and the room. The traps and proofing were effective in catching the mice, and Tim was always ready to come over to dispose of the mice and reset the traps as soon as I called. I am happy to report that my storage room is the cleanest it's been in years and there have been no sign of mice for the last week! Tim is seriously the epitome of your friendly neighborhood mouse (or rat) guy - professional, trustworthy, and an all around friendly guy who feels like he's your next door neighbor who popped by to say hi while giving you a huge helping hand with your mouse problem. He is the best! If you see him please tell him I say hi :) read more

Update to our 8/2 review. The traps Tim set worked wonderfully; 2 huge rats found their demise (unfortunately for them - very sad), but for us, with a tinge of guilt, we are extremely relieved! I notified Tim after checking the traps this afternoon and he promptly came by, safely removed them, and took them away. We are so grateful for the top notch service, kindness and care provided to us. Thanks again Tim! read more

Excellent job, great service! Tim knows what he's doing. We live in an old Victorian with oh so many holes for the rodents to enter. Tim sealed every possible entry with metal flashing and cement. The activity in our garage stopped that night. He's since been back and double checked everywhere, adding a few layers of screen or extra barrier just to be cautious. Tim does not simply set up traps and charge a monthly service fee to monitor. He really stops the rodents from entering. Great work. Good guy too! Yay Tim and Rat Proof! read more

Tim is very up front and efficient. He has been doing this for a very long time so he knows what's best to get the best results. I really recommend him if you are having rodent issues. He goes over & beyond to make sure your issue is resolved. He will also tell you if he isn't able to help you, he doesn't seem to be the type to lie just to get your money. read more

Tim squeezed us into his schedule to come check out our mice problem. He was so honest, reliable and helpful. Tim is not only professional but a good person, which is the type of business we want to support. Could not recommend enough read more

Overdue review. Tim was great and patient. He doesn't try to upsell you things like most other rodent businesses do (I've gotten 3 other quotes that tried to scare me into buying services I didn't need; ranged from $2-4k). He got the job done, no bullshit involved. read more

Tim was wonderful. He came to my house and was pretty fair and honest with the work needed to be done. He showed me the holes that I needed to close and helped me understand the process smoothly. I totally recommend him and really appreciate his willingness to help instead of taking advantage of us and charging a fair price compared to the other quotes I received. Thank you Tim! read more

I have never known anyone to be as knowledgeable (frankly: obsessed) with rodents as Tim. We didn't want to do poison because we have pets and small children, and Tim offered several other options. His work sealing all the entrances to our home was extremely thorough and so far successful (it's been about 6 months). I have recommended Tim's business to others ... and hopefully I never have to call him again! read more

Tim is kind, down to earth, honest, and matter of fact. We have a rat problem we've been trying to fix on our own, and recently decided we needed more help. He fit us into his busy schedule, was very communicative prior to our appointment, and arrived promptly. He assessed the issue while talking us through what he saw, and ended up saying we'd already done most of what needed to happen to prevent rats from getting in. He checked where they might have been entering the boiler room and pointed out another area to shore up with sheet metal, then said nothing really needed doing. I would recommend him to any of my friends, and wouldn't hesitate to reach out to him in future should the need arise. Thanks so much, Tim, I felt such relief at having the problem assessed so quickly and thoroughly! Already feeling less grossed out about my own house. read more

Awesome guy. I called for an assessment and he was there in an hour. He spent about a half hour, checked everything out and told me it wasn't a bad enough problem for me to have to pay him. He said for me to finish my renovations and call back if the problem persists afterward. Gave me a few suggestions in the mean time. read more

Tim is absolutely and positively the man. It's clear that he absolutely loves his job. We found a dead rat on New Year's Eve. Even though Tim was incredibly booked (he's got a great voicemail, by the way), he still showed up on New Years Day to collect the dead rat and seal our basement. Three days later and I am still blown away by his professionalism and customer service. I've saved his number in my phone and will be calling him for all of my future rat/rodent needs forever. Meeting Tim may be the best thing to have happened in 2023. read more

Tim is the professional you want on your side if you need rodent exclusion work done right the first time. Before Tim started on my project we had been battling rodents in various structures around our property for almost 5 years. My general contractor and two pest specialists helped me wage war over this time to get things in order, but they resorted to poison and traps instead of doing the actual work required to truly rodent proof. Over the course of a couple if weeks, Tim carefully worked to locate and seal many points of entry and many trouble spots across 4 different, complicated structures. He also said he would honor our original contract even after he needed to do more work when he found additional issues. Even the best exclusion work can't stop rodents from finding new and interesting ways into where they want to go but it's great to have Rat Proof on my side when these inevitable issues pop up. In short, this business is knowledgeable, trustworthy and works hard to get the job done right. It's very difficult to find this quality work product and dedication to doing the job correctly these days. read more

Tim went above and beyond in helping us with a multi-storey mice problem, ensuring that every gap was secured, and coming back at regular intervals to check to ensure they haven't returned (which they haven't!). He's hyper responsive and was able to complete work that others said wasn't possible. Would absolutely recommend! read more

Tim was excellent start to finish. Quick replies to texts and very communicative about the inspection appointment. Tim arrived exactly on time and inspected our property. He did a fantastic job of explaining what he was looking for as he went, and providing suggestions for what to improve. He climbed down into our crawl space and up through the closet access into our attic. He made recommendations and suggested that the remediation would be simple enough for us to do on our own. He gave us a bunch of tips on what to look for in the future too. Highly recommended! Thanks, Tim! read more

Of all the companies I contacted,Tim 's was the most genuine, caring and responsive company. He offered to help within a few hours and me good on his follow up. He was highly knowledgeable and made a number of great suggestions. I would highly recommend Tim and his company as he knows what he's doing and is incredibly helpful. read more

he is such a great and likable guy. He really knows what he is doing. Would definitely use him again. His prices are good too.

Tim was responsive, timely and immediately found the hole in the kitchen where a mouse was entering/exiting. He plugged it up and inspected the rest of the property. I would highly recommend him for all of your pest control needs! read more

Tim did a phenomenal job! I have been hearing noises at night in the attic and it was obvious there was some kind of a rat up there. I called a few companies but they wouldn't come over for a quote for at least 10 days. I found rat proof on Yelp and Tim was able to come and take a look the same evening. He was able to identify and close with metal sheets and concrete the entry points and install traps. read more

5 stars for Tim and Rat Proof! This is what you wish all service people / companies to be like. Got back to initial call very quickly , offered to come out on a Saturday as he was all booked in the week, and arrived EARLY! What? He took the time to listen to what we were saying about our rat problem and came up with a GREAT plan ! I would highly recommend Tim/ Rat Proof to anyone! read more

We woke up one morning and saw alarming evidence of rat(s) in our garage. They chewed at the bottom of 5 doors, leaving wood chips and droppings all over. We called and called to get same-day help. Most could not come in several days and one offerred to come the next day for over $1000. Tim was the only one who agreed to provide a free inspection on the same day. He arrived at 8:30PM. Before knocking on our door, he already inspected the front of the house and saw evidence of rats. After inspecting all over the garage and the backyard on his hands and knees, he told us that our house was well sealed and most likely we accidentally trapped a rat in the garage and he tried to chew his way out. He gave us tips on how to avoid having the rat die inside and stink up the house and how to facilitate his exit. What was completely unexpected was that he did not charge us. He told us that we could solve the problem ourselves with the advice he provided and he could come back to help us if the problem persisted. We followed Tim's advice and it looks like Mr. Rat indeed has left our house as Tim predicted. Tim really knows rodents!! What's even more precious is his honest business practice and willingness to help others in need. We could not recommend him highly enough. read more

Last Thursday we had very unwelcoming visitors. They chewed off corner of the wall and got in which was alerted to us by our dog. We then began to call local companies to come in and found Tim. He was so kind to stop by our home on the same day although he was so busy from his previous job site and provided us with recommendations until his available to come in. Following his tips, we actually got the one that came in on our own and while we were living in fear without knowing how many actually made it in to the house, we followed his recommendation of vacuuming daily and checking for the drops. We didn't see any so we were sure that only one got in. In few days, he came and did the job very efficiently to seal the house inside and out and set traps. End result, know your enemies, we learned so much about rats and their behaviors from Tim and we caught 3! We hope that our battle is over and Tim promised to come back to check on the traps as follow up service. Strongly recommend if you have any rat problems and don't wait too long. Don't waste your time calling the high review companies, they are just too busy and not available when you need the help right away. Just call Tim read more

We're very lucky to find Tim and helped us with the rat issue on our property. He was very professional, gave us good options and recommendations. He's very punctual and flexible in so many ways. We love the way he did the follow-through, when he told us he will go to the property on xx date, he made sure he's there. And he also didn't stop from ensuring that we will not have any more problems with the rat. Highly recommended. read more

If I could give 10 stars, I would! We were horrified to find that a rat had gotten in our garage and 5 baby rats were in our kitchen. We called Tim and he came over within 15 minutes! He expertly rodent proofed our house, top to bottom. We had the house rodent proofed with we bought the house 3 years ago, though Tim found 5 entry points the last rodent proofer missed. We have a 1920's Spanish style house and Tim was very particular about the quality of the proofing that he did, where you do not even notice the proofing was done. He loves what he does and you can tell he takes immense pride in his work. A job that he should have taken him 3 hours, he spent 5 hours, and did a lot of extra work for us. I cannot recommend him enough! read more

Tim is your guy! Incredibly earnest and clearly passionate about his work. Very responsive and accommodating. He is someone you can trust. He pointed out things others may have missed. Couldn't have asked for a better experience, thanks Tim! read more

We had a rat issue in our garage and crawl space. Tim came quickly to our aid, expertly evaluated the portals of entry, blocked them and set traps. Tim worked efficiently like a detective and was able to get into the mind of the rat. He responded promptly to our updates and successfully caught the rat. He is passionate and effective in what he does, and charges very reasonably. We highly recommend his expert services. read more

Tim is efficient, honest and reliable. He's also super responsive and available after hours for a rodent emergency. But since he keeps his phone on, we should be considerate and only call/text during the day for updates or to schedule appointments :) Thanks Tim read more

Tim was amazing! The road construction brought unwanted rodents to our property and we were worried about our 3 English box turtles that live in the yard. Tim was out the next day! He was fast professional, incredibly knowledgeable and he gave us a plan of attack. He found holes and permanently fixed them, no BS contracts or visits to rack up a bigger bill. We recommend him 100% and while I hope we never need him again ... if we have an issue he'll be our guy. read more

After some very expensive car damage caused by rats in our garage chewing some engine wires (I didn't even know this was a thing!) we contacted several "rat proofing" companies. Tim was by far the most responsive, fastest, friendliest, and cost-effective. He secured our garage quickly and educated me on rat behavior and where they might be busting in from - he knows what he's doing! We haven't had any issues since. Thanks Tim! read more

I needed this service due to a mouse infestation. Tim was the man I spoke to and did the work for our house. He is extremely professional and knows what he is doing. It is sometimes very difficult to find a honest contractor in San Francisco, but I can say with full confidence Tim went above and beyond to help us. He has been doing this for years. He was able to find and eliminate all mice in a very short amount of time. His attention to detail was what I was impressed with the most. He is fairly priced for the work he does. If you want a job done right the first time with no headaches, Tim is the man for the job. Very impressed. read more