Gilpost · Seongdong-gu, Seongsu-dong 2-ga
Cafe
T Coffee
티 커피 Ti Keopi The name is just the letter T followed by the English word coffee; no post explains what the T stands for.
Compiled from 10 blog posts read in fullSources →
A café on the basement level of 159 Achasan-ro in Seongsu-dong, serving coffee, teas and a short list of cookies, scones and cakes. An Americano is 5,500 won and desserts run 4,000–7,500 won; three posts say you can pick between a nutty bean and a brighter one. A pizza shop shares the same floor. We read 29 posts dated 19 September to 6 October 2026; 10 of them, from 23 September to 5 October, are first-hand visits here. Eighteen were about other places with similar names, and one was a list of newly registered businesses.
Data as of · Published ·
Location & hours
- Address서울특별시 성동구 아차산로 159, 제이케이앤디 지하1층 (성수동2가)159 Achasan-ro, Seongdong-gu, Seoul
- Phone010-8175-9050
- Typical spend₩4,000 – ₩8,000
- Floor areaFloor area 109 m² · Status In business
When it opens
Of 8 posts: 6 wrote Weekdays 09:00–20:00, 6 wrote Weekends 11:00–20:00.
| Weekdays | 09:00–20:00 | |
|---|---|---|
| Weekends | 11:00–20:00 |
Rows without a count: 6 of 8 posts.
Counted from what bloggers wrote in their posts; we did not confirm it with the restaurant. Where the values differ, it may be a change over time rather than a disagreement, so we show when each one was written.
What sets it apart
- Despite being underground, it has windows onto greenery. Eight of the ten posts describe the large window or the window seats, several naming bamboo outside; one says a row of wooden benches runs along the glass. Several visitors wrote that the basement did not feel closed in.
- Most visitors found it quiet. Six of the ten called it quiet or calm; one said it is not silent and other guests do talk. Several saw people working on laptops, and three noted power outlets. One visitor who came around 3 p.m. on a weekend found almost no free seats.
What 10 bloggers said
amerikano
Quiet
We read all 10 in full. The most common claims are “Quiet” (6) and “Clean” (2).
What they liked
Things you can check on site
- Seats to sit and eat 9 of 10 posts
- In a basement 9 of 10 posts
- Large windows 8 of 10 posts
- Phone charging 3 of 10 posts
These are raw counts, not percentages. Someone who did not mention something is not someone who disagreed.
Who came, and with whom
- Date 1 of 10 posts
- Solo visit 1 of 10 posts
Where it is
We could not find this shop’s own listing on Naver Map, so the link searches for its Korean name around this spot instead.
Getting inside
| In a basement | 9 of 10 posts |
|---|
It is underground, and finding the door can be confusing. Nine of the ten visitors wrote that they went down to the basement, three of them by stairs. Five mention the pizza shop next door, and two say you have to walk through or past it before the café appears — one warns readers not to panic when all they see is pizza. One visitor notes the building directory lists the café on B1 alongside Pizza Slice.
We don't know whether wheelchairs or strollers can get in. Three visitors took stairs down to the basement, but nobody mentions an elevator or another way in. That does not mean there isn't one, only that nobody wrote about it.
We don't know whether the restroom is inside the café. One visitor photographed a white-tiled restroom with a sink but didn't say where it is. Separate men's and women's restrooms appear only in one copied listing, which we don't rely on.
No one mentioned: Second floor · Lift to the floor · Ramp at the door · Step at the entrance · Step-free access · Toilet inside · Accessible toilet · Separate restrooms. That is not the same as there being none — it means we could not confirm it. Worth calling ahead, and do tell us: we will put it here.
How to read these posts
- Posts disclosing payment1 of 10 posts
- Posts saying they paid themselves2 of 10 posts
- Posts saying nothing either way7 of 10 posts
Posts that followed a TV spot
Of the 11 posts we gathered, 1 went up on a single day right after a TV spot and show no sign of a visit. They retell the broadcast, so we left them out of the counts.
We do not discard them. That a TV spot produced a burst of posts is itself something worth knowing about a place, and a star rating will not show it.
When the posts appeared
Month by month
| Month | Posts |
|---|---|
| 2026-09 | 3 |
| 2026-10 | 7 |
What we do not know
- The posts are bunched together. All ten visits were written between 23 September and 5 October 2026, and several repeat the same search phrases, such as 'Seongsu café for office workers' and 'quiet Seongsu café'. Only one discloses sponsorship and two say they paid their own way; the other seven say nothing either way.
- No visitor described walking from a station; the '488 m from Seongsu Station exit 2' figure comes from a copied listing.
- Only one post addresses waiting: a visitor who came after 3 p.m. on a weekday walked straight in. We don't know about busier times.
- Few posts say who they came with: one went alone and one with a girlfriend. None mention going with friends, family or a group.
- Opening hours mostly agree, with one exception. Six posts give 9 a.m.–8 p.m. on weekdays and 11 a.m.–8 p.m. at weekends; only one says it copied them from the door. One post lists Monday with the later weekend hours. Apart from one post saying 'no closing day', nobody mentions a day off.
- Prices come from posts written in September–October 2026: drinks from 5,500 won (Americano) to 8,000 won (vanilla chai), desserts from 4,000 to 7,500 won. One couple paid 17,300 won for a cold brew, a matcha latte and a lemon sandwich cookie.
- Only one post lists a phone number, and nobody says whether the café takes reservations.
Sources (10)
Every number above was counted from the posts below.
- 서울>성동>카페> this is never 평범. 성수 '티커피 T Coffee' 디스이즈네버.... 2026-10-05 · Goodwavemaker
- 성수 조용한 카페 T Coffee, 작업·독서하기 좋은 분위기 좋은 카페 ☕.... 2026-10-05 · 냠냠몬의 알쓸간식
- 성수 감성 카페는 이곳입니다 - 성수 직장인 카페, 성수 카페 2026-10-05 · 맛파 - 전국 맛집에서 푸드 파이트!
- 성수 카페 데이트 가볼만한곳 조용한 직장인 작업하기 좋은 티 커피 2026-10-05 · 별빛 셀럽톡
- 성수 직장인 카페 티커피, 원두 골라 마시는 조용한 지하 공간 2026-10-04 · 메이티나 이야기
- 성수 카페 '티커피 T coffee' 분위기 좋은 신상 카페. 카공하기 좋음 2026-10-02 · 먹고 힘내자!
- 성수 조용한 카페 티커피 혼자 힐링하기 좋았던 곳 2026-10-01 · 소소하지만 완벽한 오늘
- [서울] 티 커피 : 성수 카페 조용한 분위기에서 즐기는 커피와 스콘 2026-09-30 · 담비의 일상
- [성수 카페] 티커피, 피자샵 옆 지하 힙한 인테리어 후기 2026-09-30 · 어디로든 떠나자
- 성수동 T Coffee 후기｜바닐라 차이티가 맛있었던 조용한 카페 2026-09-23 · mingxing의 하루하루 · via Daum
Of 366 candidate posts we opened 120 and kept 10 as evidence. We have not seen them all yet; another pass would add more.