What Astera Labs makes for data centers
public · HQ San Jose, United States · asteralabs.com
Astera Labs designs fabless connectivity silicon for AI and cloud infrastructure: Aries PCIe/CXL retimers and smart cable modules, Scorpio fabric switches for scale-up PCIe/CXL connectivity, and CXL memory controllers, managed fleet-wide by its COSMOS software. It sells chips and modules to server and rack-scale system builders.
Parts, by layer
Layer 2 — Memory & storage
Layer 3 — Networking & interconnect
| Part | Role | Confidence | Competitors | Note |
|---|---|---|---|---|
| Scale-up fabric | manufacturer | disclosed | Alphabet (Google), AMD, Broadcom, Nvidia, UALink consortium | Scorpio X |
| Retimers inside AECs | manufacturer | inferred | Broadcom, Marvell, Spectra7 |
Where Astera Labs sits in the stack
Astera Labs's placements in this catalog cover 4 parts, from layer 2 (memory & storage) to layer 3 (networking & interconnect). None of them currently carries a sourced supply constraint tag. Across these parts it overlaps with other companies most often on the lines below.
What these parts are
- CXL controllers & memory expanders — Chips that let a server attach an extra pool of DRAM over a CXL link rather than only through the CPU's own memory channels, expanding usable capacity beyond what fits in local DIMM slots.
- PCIe/CXL switches & retimers — Fabric silicon — switches that fan a single PCIe or CXL root out to many downstream devices, and retimers that clean up the signal over longer runs — connecting accelerators, SSDs, and pooled memory back to the host.
- Scale-up fabric — The fabric linking GPUs to each other inside a single rack or pod, separate from the switching fabric that connects racks to each other.
- Retimers inside AECs — Retimer chips embedded inside active electrical cables (AEC) that regenerate the signal to extend reach at high speed.
Closest peers in this catalog
Latest feed
- Astera says customers are rethinking HBM needs for AI accelerators — DigiTimes, 2026-09-16Astera Labs suggests that customers may reconsider the necessity of on-chip HBM for AI accelerators by utilizing external memory tiers for key-value cache storage.
- Astera Labs Releases Leo 2 CXL Memory Controllers and Leo X Controller for Rackscale Fabric-Attached Memory — ServeTheHome, 2026-09-15Astera Labs launched the Leo 2 memory controllers, supporting CXL 3.2 and PCIe Gen6, and the Leo X controller for connecting memory expanders directly to AI accelerator fabrics.
Questions about Astera Labs
- What does Astera Labs make for AI data centers?
- This catalog places Astera Labs on 4 parts: CXL controllers & memory expanders (manufacturer), PCIe/CXL switches & retimers (manufacturer), Scale-up fabric (manufacturer) and Retimers inside AECs (manufacturer).
- Is Astera Labs publicly traded?
- Yes — Astera Labs is listed on US exchanges (NYSE/Nasdaq) under ALAB. Prices shown on this page are a nightly snapshot, not real-time, and nothing here is investment advice.
- Where is Astera Labs based?
- San Jose, United States, per the company record in this catalog.
- Who else makes CXL controllers & memory expanders for AI data centers?
- Marvell, Microchip, Micron, Montage, Rambus and SK Hynix are also placed on CXL controllers & memory expanders in this catalog.
- How well sourced are these placements?
- Every part→company placement carries a confidence tag. For Astera Labs the mix is 2 disclosed and 2 inferred. "disclosed" means the company or a filing says so; "reported" comes from trade press or a reference-design list; "inferred" is a lead from the taxonomy with no citation yet. Treat reported and inferred as leads, not facts.
Answers are generated from this catalog's own rows — see sources & method.
Verification: enriched, last verified 2026-08-27. Sources: www.asteralabs.com · www.asteralabs.com.· Markdown · JSON