Arch Reactor

Arch Reactor

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A hackerspace in St. Louis for artistic, technical, and educational pursuits. Arch Reactor :
1. A hackerspace (or makerspace) based in St. Louis.
2.

A workshop combined with a meeting space where people of similar interests or skills can converge to create, modify, learn, talk and build. At least, that's what we strive to be. Wikipedia has a more in-depth explanation of hackerspaces, if you'd like. Our workshop provides several tools that you might not be able to afford on your own, as well as short-term storage for your projects. Our meeting area, equipped with a projector, white board wall, and a wide assortment of seating, allows us to hold classes, meetings, and other events in comfort. Naturally, we also have fast, free Internet access. We hold weekly meetings every Tuesday that are open to the public, so feel free to stop by and check us out!

Photos from Arch Reactor's post 09/19/2026

We are hanging out at 3DSHQ for another couple hours for their 1year anniversary party!. Along with Inventor Forge Maker Space and MADE Makerspace And a whole bunch of other creators

Will be here until 4:00 p.m. come check the place out. Thank you

05/17/2026

this last Tuesday we had a great turn out for our Open house.. Gave a bunch of tours and Enjoyed some food off the grill. Thank you to everyone that made it out. :)

That said We always have a ton of new things on our Calendar.

things like :
● CAD Meet up and study every Sunday
-- we talk about and make things using CAD software. From newbie to seasoned pro, all are welcome to share, learn and collaborate.

● Friday Fire - 05/22
-- Its a Fire on Friday We’ll bring a fire and you bring a chair. Social gathering to enjoy company around a fire.

● 3D Printer Meetup - 05/22
-- Whether you're interested in printing for art, prototyping, manufacturing, or just fixing dishwasher soap lids, this is a a great place to meet other folks in the Hobby.

● Boffer Sword Build Night - 05/27 - 5$ Cost
-- Come on out to Arch Reactor and build foam swords. We have plenty of Open table space to take advantage of for the evening.

● AR Board Game Day - 05/30
-- Come On Out, see the space, and Play games With us. If you don't know games that's OK we are friendly and love to teach. If you do, bring your Favorites along and lets get a Game in.

And this is just the next few weeks.. Check out our Calendar For Full Details and more events :)

05/08/2026

One last call for this

May 12 Starting at 5 pm --- BBQ Grill and Open House!

If you have been thinking about checking the space out here is a great chance to do it and grab some dinner while you are at it. We welcome you to share our space and find out who and what we are. We will have a few of the machines running to show off.. there will be Members around that can answer questions and chat with.

AR Will Provide Burgers and Hot Dogs on the Grill, along with an Assortment of Bagged Chips and Potato salad.

And in true maker Fashion Desert is looking to Liquid Nitrogen Ice Cream. 🎉 while it lasts.

04/03/2026

Looking for something to do this beautiful weekend? Well AR has a few things on the calendar.

2600 Meet-up :
Tonight we are hosting a local 2600 meet-up. Tech folks all they discuss ranging from AI to Facial Recognition to Lock Picking to Info_sec ;)

Find out more about tonight here :
https://www.meetup.com/st-louis-2600/events/313137165

Takeout & Hangout :
Tomorrow (Sat Apr. 4th) is a Monthly meet-up of folks looking enjoy a night out without all the troubles of going out to eat ;) .. No parking fees, no waiting for a table, no loud room to talk over, and even maybe the opportunity to try a new place out.

Grab some food from somewhere, or make some and bring it on out. Enjoy a couple hour of conversation with plenty of room to spread out. Maybe bring some extra to share. Doors open at 7pm and we’ll be around until 9pm(ish)

STL CAD Study Meet-up:
Starting at 1pm on Sunday (Apr 5th) Kho hosts one of our newest meet-ups focusing on helping folks learn and use CAD software. This is a great opportunity to brush up on skills, learn a new one, or just have folks handy while you are working on a project just incase you get stuck

Sunday open house :
Starting at 7p we have our weekly open house. If you have never been in, wanna check the space out, or just have general questions and want to do it in person this is the time for you.

We ask a full member to hang out from 7p-10p to do those duties. In addition the membership at the Supporting level can count on this being 3 full hours they can come in and work on projects.

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Telephone

Address


2215 Scott Avenue
St. Louis, MO
63103

Opening Hours

Tuesday 7pm - 10pm
Sunday 7pm - 10pm

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