SIXT Rent A Car Boulder Downtown

Reviews

• DC

  Daniel Change

  Dec 17, 2025
  1.0
  Mark offered a refund for the issues with a simple 3 day rental. I have yet to receive it. I have come back several times over the last several months to ask for a manager to help and everyone seems to just have their hands tied. On top of hardly staffing this counter, they can’t and have not followed through on their promises or fixed their mistakes. If you want to make it right, finally make good on your refund promise or at least reach out because I have been back several times and you haven’t bothered or the right person is never there.
• CB

  Chas B

  Nov 28, 2025
  3.0
  Arrrgh! We rented an SUV for six days. I live in Boulder County; my girlfriend and I are in our late fifties and sixties, and we went up to Summit County to meet our friends. Considering how road conditions can quickly change, plus luggage and ski equipment, etc., it was better to rent an SUV than use my hatchback. We returned the SUV before our contracted time of 10 AM and took a video and photos and parked the vehicle. We dropped the proximity key off in the SIXT lockbox and went home to put up holiday decorations. At 2:11 PM I get an email saying that we have not returned the vehicle! Thankfully we have photos, a gate ticket with the time, and video! You can’t call the Boulder office, so now you are dealing with an AI bot and then a representative in Germany (+49). Using WhatsApp, I had to upload photos and the video to prove I returned the vehicle. Our impression when picking up the SUV was very positive; returning the vehicle seemed easy enough, but getting that email caused a lot of unnecessary stress. Update – 11/29: At 2:40 PM I received another email demanding that I return the car immediately. I called the 877 number, worked through the phone prompts, and eventually got a live representative by saying “representative” several times. The rep contacted the Boulder branch directly and confirmed that the rental had been returned.
• SD

  Sasha Dorje

  Nov 9, 2025
  1.0
  Warning. Do not rent from Sixt. They are deceitful. An agent told me unused days would be refunded; now they say it can’t be with a prepaid rental. In direct contradiction to what the agent said in person. ***Warning - the Sixt staff will pretend to care using their training scripts to fool you, but in the end they only maintain policies that screw the customer. It’s all fake. Rent elsewhere!!!
• JB

  Jordan Brown

  Sep 16, 2025
  1.0
  Don't rent from this Sixt location or from Sixt in general. My wife and I have rented from Sixt a number of times over the past few years, but never again. Sixt attempted to charge us for scratches and interior damage that WE pointed out to Sixt when we rented the car. And then Sixt attempted to claim that we made the issues that we had pointed out. Just ridiculous. The whole operation feels like they are trying to find ways to charge you more money. It is extremely unprofessional. I would not trust them with access to my credit card. The "nice" car is really not worth it. We rent a car for a week in Boulder at least twice a year. We will never rent from Sixt again. Save yourself a headache.
• JM

  James Marks

  Sep 4, 2025
  1.0
  This was an absolutely terrible experience. Nobody should ever rent from this location or this company!! We have been having a nightmare. We reserved a car weeks in advance, for a 5pm pick-up, for 48 hours. On the day of our pick-up, an employee named Rob called us to inform us that the car we reserved would, in fact, not be there if we came at 5pm. He told us, at around 11:30am, to get to the pickup right away. We ubered to the location as quick as we could, and got there, panicked, at 1:30-2:30pm. Rob was not there when we arrived - a different employee was, instead, and did not understand why Rob told us to come ASAP. We were informed that the car was, in fact, available, and that there was no need to arrive so early. The issue for my partner and I at this point became that if we picked the car up now, then we would have to return the car 4 hours earlier than planned. If we did not pick the car up now, then we would have to uber home, then uber back to the pick-up site, to pick up the car at our scheduled time. We ultimately had to restructure our plans, for we decided to just pick the car up immediately. This whole process took quite some time, but the employee Nathaniel kindly helped us out, upgraded us, and informed us that we could have an extra hour of a grace period to drop the car off two days later. When we go to drop the car off, a third employee is working at the desk. He asks us to give him the keys, and tells us that everything is taken care of, and that we will receive a receipt within 24 hours. After that 24 hours has passed, me and my partner received an email, charging us for a 3 day reservation, rather than the 2 days we rented the car for and returned in the time-frame. The Sixt service seemed to think that we returned the car significantly late (which we did not, at all, which that third employee could have attested to). When we go to call Sixt to figure out what has happened, Rob answers the phone, and simply sends our complaint to HR. We also receive an invoice which reports that we dropped off our rental car at 5pm, which I suppose explains why the system marked us as returning the car late. This was, of course, almost 2 hours later than we, in fact, dropped off the car. So I have no clue how that happened. After about 3 days of trying to resolve this matter, Sixt has finally refunded the $100 which they initially charged us for a supposed third day of rental. This only happened after days of constant calling and emailing the company, however, and providing photographic proof which we thankfully took, of us dropping the car off when we did. If we didn't happen to take this photo, I suppose our money would have been taken. Normally, I would never blame the on-ground employees for mistakes happening at a large company. In this instance, however, I feel as though multiple mistakes were made by those who handled our rental, which compounded into an awful time. I won't be renting from Sixt again. As I post this, I am now seeing all the reviews of people being scammed in similar ways from this company. Take the warnings: this will likely happen to you, as well.

Frequently Asked Questions About SIXT Rent A Car Boulder Downtown