How much of the industry publishes its numbers

An engineer picks a part by its figures. Yet of 6213 catalogued products only 1721 — 28% — come with a datasheet anyone can download; for the rest the numbers have to be requested by email. This is what that looks like across the market.

28%
have a downloadable datasheet
92%
state at least some specifications
27%
publish a mass figure
120
suppliers with 10+ products
Read this as a floor, not a verdict

A product counts as open when its datasheet is published where anyone can fetch it. A datasheet available «on request» counts as closed, because to the engineer choosing a part the two are the same. Where we found no file, the manufacturer may still publish one somewhere we did not look — so these shares are a lower bound on openness, and the direction of the error is stated rather than hidden. This page also has no list of the least open companies: the figures would be accurate, but a public naming of the worst turns the conversation into an argument about method.

Counted from catalogue records, not estimated. As of 2026-09-05. Free to reuse with attribution (CC BY 4.0) — download as CSV.

By segment

Segment Products With datasheet Share
Other Products 52 40 77%
Scientific Instruments 64 31 48%
Sun Sensors 59 28 47%
Star Trackers 67 31 46%
Thermal Control 111 51 46%
Reaction Wheels 98 43 44%
CubeSat Deployers 70 30 43%
OBC & Avionics 275 119 43%
Radios & Transceivers 217 93 43%
ADCS & Navigation 449 175 39%
Deployers & Separation Systems 180 69 38%
Solar Panels & Arrays 158 59 37%
Antennas 235 84 36%
GNSS Receivers 72 26 36%
Separation Systems 86 31 36%
Communications 669 225 34%
Power Systems 325 112 34%
Batteries 57 19 33%
EPS & Power Conditioning 68 22 32%
Structures & Mechanisms 357 113 32%
Test Equipment & EGSE 345 112 32%
Electric Propulsion 149 46 31%
Cameras & Imagers 146 42 29%
Ground Segment 1014 290 29%
Magnetorquers 30 8 27%
Payloads & Instruments 389 104 27%
Microelectronics & Components 340 89 26%
Ground Stations 180 41 23%
Propulsion 483 107 22%
CubeSat Platforms 180 38 21%
Chemical Propulsion 123 25 20%
Software & Services 491 82 17%
Launch & Rideshare Services 66 10 15%
SmallSat Platforms 190 29 15%
Satellite Platforms 739 106 14%
Launch Vehicles 191 22 12%
Human Spaceflight 43 4 9%
Orbital Transfer Vehicles 48 1 2%
Optical Communications 28 0 0%

Suppliers who publish everything

Companies with ten or more listed products, ordered by how much of their range comes with a datasheet. Ten is the cut-off because a share computed over three products says nothing.

Supplier Country Products With datasheet Share
Bartington Instruments GBR 49 49 100%
RevGo USA 19 19 100%
ETL Systems GBR 16 16 100%
OHB Sweden AB SWE 15 15 100%
SSTL (Surrey Satellite Technology) GBR 12 12 100%
XMA Corporation USA 12 12 100%
WiRan POL 12 12 100%
Space Electric Thruster Systems (SETS) UKR 10 10 100%
Triad RF Systems USA 31 30 97%
EXA (Astro-und Feinwerktechnik) DEU 21 20 95%
ReliaSat GBR 18 17 94%
FAULHABER Drive Systems DEU 47 43 91%
SpaceBridge Inc. CAN 22 20 91%
AAC Clyde Space SWE 51 46 90%
Alén Space ESP 20 18 90%
Busek Co. USA 20 18 90%
Tethers Unlimited, Inc. (AMERGINT) USA 10 9 90%
Mercury Systems USA 46 41 89%
Dragonfly Aerospace SOUTH AFRICA 16 14 88%
Airbus Defence and Space FRA 14 12 86%
AVCOM of Virginia USA 14 12 86%
Anywaves FRA 27 23 85%
GomSpace DNK 68 57 84%
Harmonic Drive USA 59 49 83%
Beyond Gravity (ex-RUAG Space) CHE 52 43 83%
Plan-S (Connecta) TUR 12 10 83%
Xiphos Technologies CAN 17 14 82%
Aerospace Fabrication and Materials, LLC USA 17 14 82%
Solar MEMS Technologies ESP 11 9 82%
Minco Products, Inc USA 27 22 81%

Top 30 of 120 suppliers with ten or more products. The full list is in the CSV.

See also: the datasheet library itself · specification comparisons · segment landscape