A Kumospace alternative billed per seat, with games in the room
Flat.social is a browser-based spatial workspace: walk up to people and talk, play games that run inside the room, and build the office live. Free for 5 people at once, $6 per concurrent seat after that. Watch the demo, then see how it compares with Kumospace on pricing and the basics.
Free up to 5 people, no credit card required
Kumospace is a virtual office with rendered 2.5D floors, proximity audio, and browser, desktop and mobile apps. If you are searching for a Kumospace alternative, this page shows what Flat.social does and puts the two side by side on pricing and the basics.
Flat.social is a browser-based spatial workspace: a virtual office your team walks around with proximity audio, plus team socials and events in the same space. Built-in games run on a physics engine, you build the map live from inside the room, and a conference-grid room type covers all-hands and presentations. Free for up to 5 people at once with no time limit, $6 per seat per month after that up to 100 people, and a $2 per seat Day Pass for one-off events. It runs in the browser, nothing to install, and guests join from a link without creating an account. Full details on the pricing page.
Is Flat.social a good Kumospace alternative?
Flat.social is a browser-based spatial workspace with the same core idea as Kumospace: walk your avatar over to someone and talk, with voices that fade with distance. It adds built-in games on a physics engine, a live build mode, a conference-grid room type and timed speed networking. It is free for up to 5 people at once with no time limit, $6 per concurrent seat per month above that, and guests join from a link without an account.
How does Flat.social pricing compare with Kumospace?
As of September 2026 Kumospace is free for 5 registered members on one floor; its Business plan is $16 per user per month on annual billing, roughly $20 monthly, with a 5-member minimum, billed per registered member. Flat.social is free for 5 people at once, then $6 per concurrent seat per month from 6 to 100 seats, plus a $2 per seat Day Pass for one-off events. Twenty-five people for a month is $400 on Kumospace annual and $150 on Flat.social.
Walk up and talk, in a world with a physics engine underneath
Proximity audio works the way you expect: voices fade in as you approach and fade out as you leave, so groups form and dissolve without anyone pressing a button. The world around it is a low-poly 3D space seen from above, light enough to run in any browser tab.
What you get in Flat.social
See flat.social in Action
Six things people do in a flat, straight from the front page.
Flat.social and Kumospace side by side
The table compares the basics: plans, what you pay for, how people join, and what is in the room. Kumospace figures come from its published pricing page as of September 2026; Flat.social figures match the pricing page.
Flat.social vs Kumospace, side by side
| Flat.social | Kumospace | |
|---|---|---|
| Free plan | Yes, 5 people at once, no time limit | Yes, up to 5 registered members, 1 floor |
| Paid price | $6 per seat per month | $16 per user per month on annual billing, roughly $20 monthly, 5-member minimum |
| What you pay for | Concurrent seats you pick (6 to 100), not named users | Every registered member; guests up to 50 at once, 4 hours a week |
| 25 people for one month | $150 | Roughly $500 monthly, $400 annual |
| One-off events without a subscription | $2 per seat Day Pass, valid 24 hours | Events on the free plan up to 30 people at once |
| Guests join without an account | Yes, via a space setting; guest limits apply | |
| Runs in the browser, nothing to install | Browser join by URL; desktop and mobile apps offered | |
| Spatial (proximity) audio | ||
| Video calls | ||
| Built-in games and activities | Football, poker, chess, dice, speed networking, whiteboards | Not a headline feature |
| Physics engine (objects roll, bounce, collide) | ||
| Edit the map live, from inside the room | Floor customisation with a furniture library | |
| Room types | Open spatial, conference grid, text chat | Spatial floors with meeting rooms on the map |
| Visual style | Low-poly 3D world, seen from above | Rendered 2.5D office |
| Open source / self-hosted | ||
| Native desktop app | ||
| Mobile | Browser on phones, limited | Mobile apps offered |
Walk into a live Flat room
No account, no install. Open the demo room, walk up to someone and hear spatial audio work. Then create your own space, free for 5 people.
Pricing at a glance: Kumospace vs Flat.social
Kumospace bills per registered member, with a 5-member minimum on Business and a separate guest allowance. Flat.social bills for the number of concurrent seats you choose, from 6 to 100, and anyone with the link can use a free seat. List prices as of September 2026.
A 25-person team, one month
- Kumospace: 25 members × $16 = $400 on annual billing, roughly $500 on monthly billing
- Flat.social: 25 seats × $6 = $150
A 60-person company where about 20 people are online at the same time
- Kumospace: 60 members × $16 = $960 a month on annual billing
- Flat.social: 20 seats × $6 = $120
A one-off event for 100 people
- Kumospace: guest allowance of 50 at once on Business; free-plan events up to 30
- Flat.social: 100 seats × $2 Day Pass = $200, valid 24 hours, cancel free until the day before
Smallest paid plan
- Kumospace: 5 members × $16 = $80 a month on annual billing
- Flat.social: 6 seats × $6 = $36 a month
Both sets of figures can change. Current Flat.social plans are on the pricing page.
Free: up to 5 people in your flat at once. Monthly: $6 per seat per month, from 6 to 100 seats. Day Pass: $2 per seat for a one-off event. A seat is one concurrent spot, not a named user, and every room holds up to 100 people. See pricing and plans & limits.
Give the whole company the link. Pay for who shows up.
Flat.social charges for the seats you pick, not for names on a list. A 60-person company that never has more than 20 people in the office at once pays for 20. Guests take a seat while they are in the room and hand it back when they leave.
Coming from Kumospace? Set up Flat.social in an afternoon
Most teams pick a template, shape it in build mode and run their first standup the same day.
- 1Create a free workspace
Sign up with Google or email and name your space. The free plan covers 5 people at once with no time limit, so you can try it properly before paying anything.
- 2Pick a map and shape it
Start from a template, then open build mode and drag in what you use: a standup corner, a couple of desk clusters, a lounge with a football pitch or a poker table, a whiteboard wall. Keep it compact; a snug office feels busier than a sprawling one.
- 3Set roles
Decide who can build, who can moderate, and what guests can do. Roles and access controls are on the Monthly plan; on Free everyone can walk around and talk.
- 4Share one link
Pin the room link in Slack or Teams. Teammates open it in a browser. Guests type a name and join without an account. Nobody installs anything.
- 5Run the first real thing today
A standup, a Friday social, a speed-networking round for new hires. The habit forms around the first useful session, not the perfect layout.
Games that run inside the room
A football pitch with a live scoreboard, a poker table, chess and dice sit in the map itself, on a physics engine, so the ball rolls and the dice tumble. The Friday social happens in the same space as the Monday standup, with nothing to share or install.
Kumospace alternative: common questions
Other Kumospace alternatives worth knowing
Each of these takes a different approach to the same idea, and we keep a comparison page for each one.
- Gather: A pixel-art 2D world with proximity audio and a dedicated map editor. See our Gather alternative page.
- SoWork: An isometric 2.5D world with AI-assisted map generation and native apps. See our SoWork alternative page.
- WorkAdventure: Open-source and self-hostable, with a pixel-art world and maps built in Tiled. See our WorkAdventure alternative page.
- Cosmos Video: A minimal 2.5D office from the UK, billed on concurrent users. See our Cosmos Video alternative page.
For a broader survey of the category, including tools that are not spatial at all, see the best virtual office tools and free virtual office options.
Give your team a space to walk around
Spatial audio, built-in games, live build mode and one link for guests. Free for 5 people, $6 a seat after that. Set-up takes about a minute.