Startup · United States

Nine Fives

HQ San Francisco, United StatesFounded 20251-10 employees

Nine Fives LLC is a manufacturer of next-generation RF Test Equipment. Founded in 2025 - Nine Fives specializes in ethernet-enabled variable attenuators, RF switches, and power meters.

Products4

PD8X

A power‑over‑ethernet enabled backplane and network switch for rack‑mounted RF test modules.

Maturity not rated

POE-ATTEN-6G

An Ethernet‑controlled programmable RF attenuator for receiver testing and automated benches.

Maturity not rated

POE-SP4T-6G

An Ethernet‑controlled single‑pole, four‑throw RF switch for selecting among four test paths.

Maturity not rated

POE-SPDT-6G

An Ethernet‑controlled single‑pole, double‑throw RF switch for selecting between two test paths.

Maturity not rated

Newest unveiled first. Open a product for its milestone timeline, components and sources.

Funding1 round · ~$500K

Disclosed: ~$500K
Latest: ~$500KPre-Seed · 2026

Funding rounds
Announced	Stage	Amount	Valuation	Lead investors	Other investors	Confidence
2026	Pre-Seed	~$500K	—	Y Combinator	—	Speculative

Pre-Seed
Led by Y Combinator
Speculative
~$500K
2026

Totals add known amounts using recorded USD conversions where available; other currencies are shown separately. A ~ marks an estimated amount.

Sources10

Profile4

1
CompanyNine Fives
Nine Fives · Supports Organization · description, Organization · name, Organization · website
“Nine Fives LLC is a manufacturer of next-generation RF Test Equipment. Founded in 2025 - Nine Fives specializes in ethernet-enabled variable attenuators, RF switches, and power meters.”
2
DatabaseNine Fives - PitchBook company profile
PitchBook · Supports Organization · employee range, Organization · founded year, Organization · linkedin url
“employee_range: 1-10 (profile: 2)”
3
DatabaseSixth-Domain public startup directory
Sixth-Domain · Supports Organization · country, Organization · kind
“{"country": "USA", "hq_iso2": "US", "id": "3a9004f7-fabf-4e29-bef5-013ebdc6c351"}”
4
DatabaseNine Fives - Crunchbase company profile
Crunchbase · Supports Organization · employee range, Organization · hq city, Organization · linkedin url
“employee_range: 1-10 (profile: 1-10)”

Products4

5
CompanyPD8X
Nine Fives · Supports System
“The PD8X is a power-over-ethernet enabled backplane and network switch.”
6
CompanyEthernet Programmable RF Attenuator | POE-ATTEN-6G
Nine Fives · Supports System
“The **POE-ATTEN-6G** is a single-channel, Ethernet-controlled programmable RF attenuator for receiver testing, signal-level sweeps, and automated laboratory benches.”
7
CompanyEthernet SP4T RF Switch, 100 kHz–6 GHz | POE-SP4T-6G
Nine Fives · Supports System
“The **POE-SP4T-6G** is an Ethernet-controlled **single-pole, four-throw RF switch** for selecting between four test paths over **100 kHz–6 GHz**.”
8
CompanyEthernet SPDT RF Switch, 100 kHz–6 GHz | POE-SPDT-6G
Nine Fives · Supports System
“The **POE-SPDT-6G** is an Ethernet-controlled **single-pole, double-throw RF switch** for selecting between two test paths over **100 kHz–6 GHz**.”

Funding2

9
DatabaseNine Fives - Crunchbase company profile
Crunchbase · Supports Funding round
“Funding Type Pre-Seed”
10
CompanyNine Fives: RF test equipment for next-gen spacecraft, drones, and cellphones
Y Combinator · Supports Funding round
“Batch:Spring 2026”

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