All good suggestions, but I can elaborate with some ideas. I'll exclude the chains mentioned but I agree that they all offer good coffee at a good price and kill in the quality department when compared to something like Staryucks. If you are happy with regular, repeatable, decent and affordable, stick to the suggestions above. If you want to join the dark side of coffee geekism, read my nerdgasm of links below haha.
I roast my own beans at home and have a bit of an obsession for Indonesian specialty coffee culture because it is amazing and really inspired me in this hobby. I sometimes buy beans from fancy roasters but will try to keep this to the best roasters in each category (that I am making up as I go along), but if you dive deep, you will find many more! Note, these are all over Indonesia, if you order online, higher quality is available for a lower price from roasters in Semarang, Jogja, Solo, Surabaya, Bandung etc. Also a good idea to keep an eye on
Jacoweek announcements, that event is always arranged last minute but is incredible in scope and attracts roasters from Singapore and other parts of Asia as well as an amazing range of local roasters from all over the archipelago.
Best places to find green beans:
IIT Coffee (Beans from all over the world)
Coffee Beyond Borders (Beans from all over the world)
Catur Coffee (local beans mostly - some partnerships where Indonesians cooperate with farms in Brazil and Panama but those are expensive)
Klasik Beans (local beans)
Lohas Beans (Colombian only - mostly exotic varieties like gesha, pink bourbon, tabi, sidra etc.)
Churumpaco (Panama only, very expensive but lots of 90+ coffees)
Interesting Small Batch Roasters:
Panna (one man operation from Semarang. Has a slow bar but sporadic opening times)
Koffiesome (Damaring Kalpika 2017 Indonesia Aeropress Champ - really small scale)
Koeslan Coffee (2022 Indonesian Coffee Roasting Champion based in Solo)
Fugol Coffee (small scale and compete in international barista competitions)
Herd Coffee (another Bandung roaster that kill it and sometimes have capsules. Has a slow bar under a different name)
JB Coffee (weird funky processed coffees. Also have green. Test your palette here)
Anjiru (Small operation in Jogja. Roast local and foreign coffees really well)
Selective (Skilled Roaster based in Jakarta)
Wisanggeni (has a small coffee space in Cilandak called Tiger Cub, has a tea brand called Tigress Tea with interesting tea and tisane blends)
Roasters with a Good Range:
Gustavo (good local coffees and some international exotics, decent espresso roasts, high prices)
Curious People (good range, good value, Jakarta prices)
Space (always has interesting coffees. Cafe caters towards smokers predominantly. OG of the Jogja scene)
Hayati (My fave cafe in Jogja. Employs lady baristas. Good value beans from a skilled roaster)
TBRK (roaster based in Surabaya. Excellent range of local and foreign beans)
Tatido (Based in Batam. Always has a range of interesting coffees)
Roasters with Capsules/Good Espresso Forward Roasts:
Titik Temu (Has classy cafes in Jakarta. Good espresso. Good capsules)
Smoking Barrels (Good cafe in Jakarta; Good espresso coffees; Good tea brand as well. Expensive but premium in feel)
Wheels (Excellent Cafes in Bandung. Good coffees. 500g bags at excellent prices)
Coffeenatics (Based in Medan. Interesting capsules and espresso range)
People Temple Roastery (Based in Tangerang. Small scale. Quite interesting)
Expat (Specialty coffee OG in Bali. Tourist prices. Pretty good quality);
Tenun (interesting espresso blends. has espresso bars in Jakarta);
Super Fancy Beans:
Kopi Relo (Works with local farmers to provide access to auction lots and competition coffees. Based in Jogja)
Instinct (Champions female baristas. Amazing exotic coffees. Great slow bar in Alam Sutera)
Onward (very talented roaster. Small batches. Very skilled with exotic coffees)
Omakafe (Cafe of 2024 World Barista Champ. Fine dining style specialty coffee)
Moodmaker (Excellent local coffees. Very skilled roaster)
A Roastworks (Super high quality. Super high prices. The Maxwell Colonna-Dashwood of Indonesia)
Beans Corp (One man operation in PIK. Good Ethiopian coffees. Sometimes has exotics. High prices)
Ordinary Roastworks (Not at all ordinary prices. Very expensive but really good quality.)
Note: All observations are subject to my personal biases and buying experiences. I like light roasts. All errors in info are unintentional and my own.