Axiom Space vs Sierra Space: Stations & habitats (orbital) compared

Scores, Space (of 10)

Darker bar: ahead of the other company on that measure.

Positioning

Axiom Space is the flown-revenue leader of the commercial space-station race, having executed four private astronaut missions to the ISS and developing the AxEMU spacesuit under NASA task orders, with a two-module Axiom Station targeted for 2028 via ISS-attach assembly. NASA's March 2026 "Ignition" reshape of Commercial LEO Destinations repriced the model, with Phase 2 awards to at least two providers expected in 2026, possibly as modules on a government-anchored hub, a frame its ISS-attach approach may fit best. Financials, the CLD Phase 2 outcome, and the station schedule are open.

Latest signals

• 15 Sept 2026ESA and Axiom Space sign MoU for post-ISS space ecosystemElectronics Weekly
• 11 Sept 2026Axiom Space and ESA agreed to collaborate on future astronaut missions.Payload
• 9 Sept 2026The Exploration Company has won more than $2 billion in contracts.Payload

49 signals name Axiom Space.

Facts, with sources

• 1 Jan 2027Spacesuit test for Artemis lunar missions in spaceSpaceNews
• 15 Sept 2026MoU with ESA for the post-ISS space ecosystemwww.electronicsweekly.com — 2026-09-15
• 11 Sept 2026Collaboration with ESA on future astronaut missionsPayload

46 facts on file.

Scores, Space (of 10)

Darker bar: ahead of the other company on that measure.

Positioning

Sierra Space is a US space company whose operating engine is now defense manufacturing: an SDA Tranche 2 award ($740M/18 missile-warning satellites, first structures completed early), a new $798M AMDT3 award (July 2026, 18 more Tranche 3 tracking satellites for Golden Dome), and a classified $450M intelligence contract. A new CEO (ex-Maxar Dan Jablonsky, February 2026) is converting it into a high-rate manufacturer, while its Dream Chaser was downgraded (NASA CRS-2 modified, first flight now a free-flyer demo with ISS docking cancelled). It raised a $550M Series C in March 2026 (>$1.4B cumulative, a $5.3B 2023 valuation).

Latest signals

• 12 Oct 2026Sierra Space’s Ghost cargo vehicle completed a 90-minute delivery from 68,500 feet.Interesting Engineering
• 2 Sept 2026Sierra Space signed national security and commercial customers for Dream Chaser’s first orbital mission.SpaceNews
• 13 Jul 2026L3Harris Technologies and Sierra Space won $1.75 billion to build 36 missile-tracking satellites.SpaceNews

19 signals name Sierra Space.

Facts, with sources

• 2 Sept 2026National-security and commercial customersSpaceNews
• 2 Sept 2026National-security and commercial customers signed for Dream Chaser’s first orbital missionSpaceNews
• 2 Sept 2026Inaugural Dream Chaser flight carrying national security, civil and commercial payloadsSpaceNews

34 facts on file.