Startup · Canada
Reaction Dynamics
HQ Longueuil, CanadaFounded 201711-50 employeesUpdated
Develops launch vehicles for satellite missions, constellation deployment and responsive access to orbit.
Funding6 rounds · ~$11.2M
- Equity raised
- ~$11.2M
- Debt, secondaries & grants
- ~$7.9M
- Latest
- ~$6.1MGrant · Mar 16, 2026
| Announced | Stage | Amount | Valuation | Lead investors | Other investors | Confidence |
|---|---|---|---|---|---|---|
| Mar 16, 2026 | Grant | ~$6.1M | — | — | — | Reported |
| Sep 4, 2025 | Grant | ~$352K | — | — | — | Reported |
| Jun 18, 2025 | Series A | ~$10.2M | — | — | — | Reported |
| Feb 24, 2025 | Undisclosed | $1.0M | — | Draper Associates | — | Reported |
| Jul 10, 2020 | Grant | $1.5M | — | — | — | Reported |
| Jan 1, 2018 | Undisclosed | Undisclosed | — | — | — | Reported |
- Grant~$6.1MMar 16, 2026
- Grant~$352KSep 4, 2025
- Series A~$10.2MJun 18, 2025
- UndisclosedLed by Draper Associates$1.0MFeb 24, 2025
- Grant$1.5MJul 10, 2020
- UndisclosedUndisclosedJan 1, 2018
Raised counts equity rounds; debt, secondary sales and grants are totaled separately. Amounts in other currencies are converted at the announcement month's average rate. A ~ marks an estimated or converted amount.
Systems1
- HermesIntegrated spacecraft propulsion unit for small satellites.
Newest unveiled first. Systems that belong to a government program link to the program page, where variants, costs and contracts are.
Capabilities1
| Technology | Role | Maturity | TRL | Notes | Confidence |
|---|---|---|---|---|---|
| Space, launch and counterspace | Developer | — | — | classify_sectors run 37, haiku, taxonomy 2026-10-18b: Develops launch vehicles for satellite missions and constellation deployment; no defense use is stated. | Reported |
- Developerclassify_sectors run 37, haiku, taxonomy 2026-10-18b: Develops launch vehicles for satellite missions and constellation deployment; no defense use is stated.—Reported
Maturity and TRL describe this organization's work; the field-wide maturity is on each technology's page.
People3
| Person | Role |
|---|---|
| Bachar Elzein · LinkedIn ↗ | Founder & CEO |
| Aliénor Lougerstay | Chief Operations Officer |
| Susan McIntosh | CFO |
Sources7
Profile4
- 1Government recordNATO DIANA | Official Website
NATO DIANA · Sep 4, 2025 · Supports Organization
“Reaction Dynamics”
- 2CompanyHome
Reaction Dynamics · Supports Organization, Organization · hq city
“We are developing launch vehicles to support dedicated satellite missions and constellation deployment ... Founded in 2017 in Canada, Reaction Dynamics”
- 3
Supports Organization · hq city
“The MOU was signed in Reaction Dynamics’ new headquarters in Longueuil.”
- 4
Systems1
- 5CompanyIn-space propulsion
Reaction Dynamics · Supports System
“Hermes: Responsive mobility for small satellites An integrated propulsion unit designed for unparalleled mobility and mission flexibility for small satellites.   INTEGRATED ELECTRONICS Built-in avionics to allow simple customer interfacing. Conducts continuous health monitoring as well as system control. PRESSURANT TANK Two pressurant tanks maintain pressure in the propellant tank, ensuring consistent thrust through mission life. THRUSTER 1N mono-propellant thruster decomposes 98% H2O2. PROPELLANT TANK Stores liquid H2O2, the non-toxic fuel enabling better-than-hydrazine density impulse”
Funding1
- 6CompanyReaction Dynamics | LinkedIn
LinkedIn · Supports Funding round, Organization · employee range, Organization · ownership, Role
“funding round: Grant, 2025-09-04, EUR 300,000, lead: NATO DIANA”
People1
- 7
Reaction Dynamics · Supports Role
“Our founder & CEO Bachar Elzein took the stage at Startupfest”
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.