Your payloadin orbit.
Hosting options for the Space Test Program, from April 2028.
November 2026
The offer
Three ways to fly with us.
Host on PRELUDEApril 2028
$15,000Per kg per month, for payloads up to 5 kg. Launch is $12,000 per kg.
Host on Adagio-MiniDecember 2028
$4,700Per kg per month, in 35 kg pods. Take as many pods as you need.
Host on Adagio2029
$2,100Per kg per month on a five-year plan; $5,300 on a one-year plan.
One architecture underneath all three. Payloads sit in standard pods that connect through SWIS, a contactless port for power and data, and are moved by robotic arm.
PRELUDE
5 kg in orbit, from April 2028.
$15,000per kg per month. Launch is $12,000 per kg, charged once.
Symphony Space platform, rendering. Patent pending.
5 kgPayload, in a standard pod
3 monthsBaseline stay on orbit
70 WAverage power; 300 W peak
350 MbitDownlink per day
550 kmOrbit, at 45° inclination
June 2027Payload delivery to Symphony
Price
About half the lowest published rate.
PRELUDE, launch included$19,000 per kg per month
Hosted payload, low published rate$35,000 per kg per month
Hosted payload, high published rate$110,000 per kg per month
For a 5 kg payload over three months, with launch spread across the stay: PRELUDE is $15,000 hosting plus $4,000 of launch per kg per month. Published rates: $100,000 to $300,000 per kg plus $10,000 to $50,000 a month (Infineo Space, 2026).
Adagio-Mini
As many pods as you need, from December 2028.
Price per kg per month
Station power, data, pointing, robotic arms
$3,650
Pod hardware and its launch
$880
Operations and downlink
$170
Per kg per month
$4,700
What each pod gives you
Payload
35 kg
Power
up to 1 kW
Data
1 Gbps optical
Pods you can take
1 to 6
6 pods16U each, on a 1 m³ station
35 kgPayload per pod
1 kWMaximum power per pod
1 GbpsOptical data to each pod
8 yearsDesign life
Dec 2028Launch
Adagio
1,200 kg of payload capacity, from 2029.
Price per kg per month, 2029
One-year plan
$5,300
Three-year plan
$4,000
Five-year plan
$2,100
What each pod gives you
Payload
about 100 kg
Power
up to 2 kW
Data
1 Gbps optical
Pods you can take
1 to 12
1,200 kgPayload capacity
12 kWPower
12 podsExchanged on orbit by robotic arm
2 kWContactless power per port
Q2 2029Launch
Q3 2029First payload operations
Launch of the payload is billed at cost. Prices fall each year as stations are built in volume.
Options
The three options, side by side.
When
Capacity
Power
Price per kg per month
PRELUDE payload slot
April 2028
Up to 5 kg
70 W average, 300 W peak
$15,000, plus $12,000 per kg for launch
Adagio-Mini pods, 1 to 6
December 2028
35 kg per pod
Up to 1 kW per pod
$4,700
Adagio pods, 1 to 12
2029
About 100 kg per pod
Up to 2 kW per port
$2,100 to $5,300, by length of plan
Why the rate falls. Larger stations spread their cost across more payload, so each kilogram costs less to host.
Prefer to own? A station can also be bought and operated by you or by Symphony. Pricing on request.
Interface
SWIS is the port your payload plugs into.
Mini-SWISPRELUDE and Adagio-Mini
Full-size SWISAdagio
Docking face
Ø80 mm; 100 mm deep
Ø220 mm; 290 mm deep
Retention
Three latches per half
Three latches per half, after magnetic capture
Power
Contactless, up to 1 kW
Contactless, up to 2 kW at one active port
Data
Optical, 1 Gbps
Optical, 1 Gbps Ethernet, both directions
Thermal
To be defined
About 200 W conducted per port
Interface mass
About 2 kg per half
4 to 7 kg per half
Development targets, not verified ratings. Both versions use identical halves on the station and the pod.
Interface control document. A formal document follows the prototype design package.
Product roadmap
One architecture, flown in steps.
Flatsat and ground test
Now to 2027Prove it on the groundThe SWIS prototype is built and tested, with results and the critical design review in March 2027. Flight units follow by mid-2027.
For you: measured interface performance2028: PRELUDE and Adagio-MiniProve it in orbitPRELUDE launches in April 2028 and demonstrates robotic exchange of payloads. Adagio-Mini follows in December with six pods.
For you: 5 kg slots, then 35 kg pods
2029: Adagio and Adagio-XLScale upAdagio enters service with 1,200 kg of payload capacity and 12 kW. Adagio-XL adds 100 kW for compute payloads.
For you: pods of about 100 kg, up to 2 kW each
Allegro in GEO
Nocturne cislunar
2030 and beyondHigher orbitsThe same bus, pods and interface are planned for geostationary and cislunar orbits, so a payload qualified once can fly in each.
For you: one interface across orbits
Let’s fly yourpayload on PRELUDE.
merry@symphony-space.com
Merry Walker, Co-founder and CEO. Send us the payload’s mass, power and data needs, and we return the interface definition, schedule and a firm price under an Other Transaction Agreement.
symphony-space.comArlington, Virginia
