Goated tea, milk tea, and boba spot. Never ever in the past 6 years encountered bad boba texture. Teas/Milk teas are perfectly balanced!

Black Sugar - Boba Bar
Black Sugar - Boba Bar at a glance
Customers generally praise the store's quick service, clean environment, and distinct black sugar flavors, noting that the boba texture is often consistent. The location is described as a small, takeout-only spot near Union Square with reasonable pricing. However, several low-star reviews highlight a recurring issue where drinks are overly sweet or watery, with specific complaints that staff ignore custom sugar requests and fail to accommodate no-ice orders, resulting in diluted taste.
- Google rating: 4.6 out of 5 from 382 reviews (77% five-star).
- Reviews on this page: 382 Google reviews (195 with written comments, 65 with photos).
- Owner responses: the business replied to 0% of reviews.
- Most recent review: October 17, 2026.
- Service: Bubble Tea Shop serving San Francisco, California.
Data from Google, last updated November 9, 2026.
Star ratings
382 Google reviews we collected
- 5 stars29577%
- 4 stars4813%
- 3 stars205%
- 2 stars72%
- 1 star123%
Praise vs complaints
Phrases our text analysis found in 195 written reviews
- Praise10693%
- Complaints87%
Topic share
How often each topic comes up in the written reviews
- Staff & attitude5246%
- Speed & response2724%
- Would recommend1513%
- Price & value1211%
- Quality & results54%
- Honesty & trust33%
What customers talk about
We read 195 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“Clean, nice marketing, nice manager/owner, good and fresh boba.”
“Rude and the tapioca was undercooked.”
“The store is really small and has no seating, but service is fast and the place doesn't get crowded.”
“The bubble tea was delicious, I recommend ordering it.”
“This was kind of tricky for me but the drink is still worth it.”
“They let us in 30 mins after closing and provided us with great service!”
“The boba is sloppy and the tea is lacking.”
“Honestly, this is my favorite boba shop in San Francisco.”
People customers mention
- Milk 5 reviews
- Tea 4 reviews
- Square 3 reviews
- Mango 3 reviews
praise complaint · found by our text analysis, Google review wording unchanged.
Photos
Customer reviews
4.6 ★★★★★ 382 reviews on Google · rating breakdown
Reviews from Google, shown as published (original wording, unedited).
Clean, nice marketing, nice manager/owner, good and fresh boba. Nice selection of flavors. Would go back!
One of my go tos for boba
We didn’t care for the flavors of either of our drinks. Prefer Gong Cha.
The place was clean and near the parking structure. Our order had 5 drinks, at least 2 of the lids were not closed completely!Small spill in the bag and that was my only complaint. I had HK milk tea with red beans, less ice, 25% sugar, was fine.
I am going pickup the customer order 1:51pm this time working man do with me bad activity and used bad words. This man very dirty using dirty hands when making drinks.
Updated review: I've been coming here for years because I genuinely used to love this place. Unfortunately, the quality has noticeably declined recently. As other reviewers have mentioned, they seem to add full sugar even when customers specifically request less (which is an option). My drink tasted more like sugary syrup than tea, and I couldn't taste the tea at all. I ended up not being able to drink it. What was most disappointing, though, was the customer service. I was surprised to read some of the owner's responses to previous reviews, and after my experience today, I understand those concerns. Having supported this business for years, the way I was treated was genuinely shocking and very disappointing.
Hi Esther, We are truly sorry to hear that your experience with us didn’t meet your expectations. If you’re willing, please send us an email with the details of what happened. We would really appreciate the opportunity to learn more and make things right. You can reach us at [email protected] Thank you for bringing this to our attention and have a great day.
Place has some good options and a fair price
pretty quick but wasnt that good
There's no better Taro Milk Boba out there, it was literally super flavorful and perfectly sweetened. The store is really small and has no seating, but service is fast and the place doesn't get crowded.
Business details
- Address: 320 O'Farrell St, San Francisco, CA 94102
- Phone: (415) 521-2022
- Website: blacksugarboba.com
- Service area: San Francisco, CA