1. What Is a Keycap Profile?
A keycap profile describes the shape of the keycaps — how tall they are, whether they're sculpted (different shape on each row) or uniform (same shape everywhere), and what the top surface looks like (cylindrical curve, spherical bowl, or flat).
Profile affects three things you'll notice every time you type: finger reach (taller profiles require more finger extension), sound (taller caps have more plastic mass and typically sound deeper), and aesthetic (each profile has a visual identity that defines the look of the build).
Sculpted vs. Uniform
- Sculpted profiles: Different rows have different heights and tilt angles, following the natural arc of your fingers. Row 1 (function/number row) sits higher than row 3 (home row). Cherry, OEM, SA, and MT3 are all sculpted.
- Uniform profiles: Every row uses the same cap shape. You can move caps freely between rows without it looking wrong. DSA, XDA, and MDA are uniform. Popular for ortholinear keyboards and custom layouts.
Top Surface Shape
- Cylindrical: The top of the keycap curves in one direction only (left-right). Cherry and OEM are cylindrical. The curve guides your fingertip to center.
- Spherical: The top curves in both directions, creating a small bowl under your fingertip. SA and DSA are spherical. More pronounced finger-center feel.
- Flat: No curve. Common on some uniform profiles (XDA) and gaming caps. Clean look, less guidance.
2. OEM Profile
OEM (Original Equipment Manufacturer) is what you get on virtually every pre-built keyboard sold at retail. It's the default. You've almost certainly typed on OEM profile already — the Corsair K70, Razer BlackWidow, and HyperX Alloy all ship with OEM keycaps.
OEM is slightly taller than Cherry profile, with a higher back row and gentler forward tilt. It's comfortable for most typists, but the community has largely moved past it in favor of Cherry for custom builds because Cherry's lower height is more ergonomic over long sessions.
3. Cherry Profile
Cherry profile is the default enthusiast choice. Originally designed by Cherry (the German switch manufacturer), it's now produced by GMK, Domikey, ePBT, and others. It sits slightly lower than OEM, with a more aggressive tilt on the function rows and a flatter home row.
GMK (also German) produces the most prestigious Cherry-profile keycaps through group buys — doubleshot ABS sets with colorways that have become iconic in the hobby (GMK Laser, GMK 9009, GMK Dracula). Non-GB alternatives include ePBT (PBT, dye-sub, excellent quality) and Domikey (ABS doubleshot, cheaper alternative).
If you want a single profile to learn on and stick with, Cherry is the answer. The vast majority of community group buys target Cherry profile, meaning the widest selection of premium keycap sets is available here.
4. SA Profile
SA (Spherical All) profile is tall — noticeably taller than Cherry or OEM — with a spherical top surface that creates a bowl effect under your finger. Made by Signature Plastics, SA profile has a retro typewriter aesthetic that makes it popular for vintage-themed builds and maximalist colorways.
The height is polarizing. Fans love the elevated typing position and the satisfying clack of thick ABS on a high row. Critics find the height fatiguing over long sessions and note that it's not optimal without a wrist rest. SA profile's weight and thickness give it one of the deepest sound signatures of any keycap — a real "thwack" quality.
SA is produced mostly in doubleshot ABS by Signature Plastics and by Drop. Popular sets include SA Laser, SA Carbon, and SA Oblivion.
5. DSA Profile
DSA is a low-profile uniform profile by Signature Plastics. Every row is identical, making it the go-to choice for ortholinear keyboards (where rows are straight grids rather than staggered). The spherical top provides some centering feel despite the flat row-to-row geometry.
DSA sits lower than Cherry and significantly lower than SA. Typing on DSA has a "flat bed" feel — your fingers don't climb rows, which some find liberating and others find disorienting. Popular among programmers who use split ortholinear boards like the Planck or Preonic.
6. MT3 Profile
MT3 was designed by Matt3o and is manufactured exclusively by Drop. It takes SA's tall, spherical premise and refines it into a more ergonomic, aggressive sculpt inspired by vintage IBM terminals. The rows are heavily differentiated — MT3 has the most dramatic row-to-row angle change of any common profile, resulting in a natural hand-cupping feel that enthusiasts describe as immediately comfortable even without a wrist rest.
MT3 is PBT, dye-sublimated, and available through Drop in sets like MT3 /dev/tty, MT3 Susuwatari, and MT3 Serika. The thick PBT walls give it a deeper, muted sound compared to GMK's ABS ping. Highly recommended for typists willing to try a tall profile for the first time.
7. KAT Profile
KAT (Keyreative Advanced Technology) positions itself between Cherry and SA — taller than Cherry but shorter than SA, with a spherical top. Produced by Keyreative in PBT, KAT sets offer high-quality dye-sublimation at prices lower than GMK group buys.
The combination of mid-height, spherical top, and PBT material gives KAT a unique feel — the bowl of SA with the manageable height of an intermediate profile. The community has embraced KAT as a "beginner's SA" — you get the spherical feel without the extreme height. KAT Milkshake and KAT Constellation are well-regarded sets.
8. MDA Profile
MDA is a uniform profile by Mito that sits at a height between DSA and KAT. Like DSA, it's the same on every row, making it ortholinear-compatible. Unlike DSA's low height, MDA provides a more substantial keycap that feels more confident to type on. Popular with Kyria, Sofle, and Corne users.
9. ABS vs PBT Material
| Property | ABS | PBT |
|---|---|---|
| Sound | Higher-pitched, "clacky" | Deeper, more muted "thock" |
| Feel (new) | Smooth, slightly slick | Textured, slightly grippy |
| Shine over time | Develops shine from finger oils within weeks–months | Much more resistant to shine |
| Legend method | Doubleshot (molded through cap — never fades) | Dye-sublimation (dyed into cap — won't fade on light legends) |
| Color accuracy | Excellent — vibrant, precise | Good — slightly duller; dark-on-light legends fade resistant |
| Top examples | GMK sets, Domikey, Signature Plastics SA | ePBT, Akko, NuPhy, Drop MT3/KAT |
| Price | Higher (GMK GB: $120–$200+) | Lower ($35–$80 for quality sets) |
PBT for your first build — better durability, lower price, and the textured feel many people prefer. GMK ABS when you're ready to join your first group buy and want a colorway that simply doesn't exist in PBT. Both materials are legitimate; the ABS vs PBT debate in the community is more about sound preference than quality.
10. Shine-Through Keycaps
Shine-through keycaps use transparent or translucent material on the legend area (or the entire cap) to let RGB lighting glow through. Almost exclusively made of ABS. Found on most gaming-oriented boards.
The trade-off: shine-through caps are generally thinner (to allow light transmission), which means a higher-pitched, less substantial sound signature. The material quality is often lower than purpose-built typing keycaps. If you're building for aesthetics with a lighting-heavy board, shine-through is fine. If you're optimizing for typing feel and sound, skip them.
11. Where to Buy Keycaps
- Novelkeys (novelkeys.com): Best US shop for in-stock enthusiast keycaps. Stocks ePBT, Akko, and regular sale sets.
- KBDfans (kbdfans.com): Wide selection, ships from China. Good for budget and mid-range PBT sets. Check the KeebTracker stock tracker for availability.
- Drop (drop.com): Runs their own group buys for MT3, KAT, and SA. Also stocks in-production GB extras.
- Cannonkeys (cannonkeys.com): Focused group buy facilitator. Runs some of the cleanest GB processes in the community.
- r/mechmarket (reddit): Secondary market for GB sets and rare caps. Group buy sets that shipped years ago appear here at varying markups.
- Geekhack / GeekHack: Where most interest checks (ICs) and official group buys are announced. Follow ICs to know what's coming before it sells out.
Group buys require patience — typical lead time is 6–18 months from IC to shipping. Never join a GB with money you need back soon. Only buy from GB runners with completed projects in their history. Always check the Geekhack thread for community feedback before committing.