Best RF Intelligence Providers

RF intelligence, the collection and geolocation of radio-frequency emissions from space, is a small, specialized discipline that sits firmly in the defense and maritime-domain-awareness world. Most commercial remote-sensing buyers need imagery; RF is a separate procurement decision with its own operators, data products, and use cases, and that honest framing should come before any product comparison.

This guide focuses on providers with an operational or near-operational space-based RF capability: dedicated RF satellite operators and one multi-modal access platform that bundles RF alongside imagery in a single contract. The market is deliberately small here; I evaluated five credible options and left out defunct programs, pure-terrestrial SIGINT vendors, and generalist analytics layers that do not own the underlying collection.

That mix of dedicated operators and a bundled-access play reflects what the RF market actually looks like. For most buyers, HawkEye 360 is the strongest standalone choice, but the best fit depends on whether you need raw RF data, maritime-specific intelligence services, or RF bundled with optical and SAR in one contract.

Key takeaways

• HawkEye 360’s dedicated formation-flying clusters make it the market leader for commercial RF geolocation at scale
• Unseenlabs leads maritime RF: 21 satellites, ITAR-free, delivering geolocation and SatPhone demodulation for dark-ship tracking
• The shortlist has only 5 entries because the honest commercial market is narrow, as RF intelligence is primarily a defense and maritime tool

How we picked the best RF intelligence providers

Five providers made this list. To qualify, a provider had to offer an operational or credibly near-operational space-based RF capability, with at least one commercial data product or service available to non-government buyers. I evaluated each against the following criteria.

• RF capability and constellation: whether the provider operates a dedicated RF satellite fleet or routes access through a third-party operator, and the maturity of that constellation.
• Coverage and revisit: the geographic scope of RF collection and the frequency with which a target area is observed, including looks per day or sub-daily revisit claims.
• Data product vs. service: whether the provider delivers raw geolocation data files, finished intelligence reports, or a data-plus-analytics subscription, and how much signal exploitation is included.
• Self-serve access: whether a buyer can order data or access the platform without a full government procurement cycle, including API and web console availability.
• ITAR status: for non-US government buyers, whether the data and hardware carry US export controls, since ITAR-free status is a procurement requirement for many sovereign and commercial programs outside the United States.
• Buyer type fit: whether the product is designed for commercial maritime operators, government defense programs, or a mix of both, and whether named customer references exist.

The comparison table below distills those criteria into the columns most relevant to a buyer evaluating RF intelligence for the first time. Full profiles follow in the section below.

RF intelligence providers compared

The table brings all five providers side by side on the five attributes most relevant to a commercial RF intelligence decision. Detailed profiles follow, ranked from the strongest all-round pick to the most specialized.

Every fact in the profiles below comes from the providers’ own published pages and primary sources. Where data was not publicly available or could not be confirmed as current, that gap is noted rather than filled with a guess.

The 5 best RF intelligence providers

Profiles are ranked by overall fit for a buyer who needs space-based RF data or intelligence. Each “Best for” line reflects the primary strength against the criteria above, not a claim to market leadership.

1. HawkEye 360

Best for overall RF geolocation. HawkEye 360, Inc. is the pioneer of commercial space-based RF geolocation, operating the world’s first dedicated commercial RF constellation from its base in Herndon, Virginia. The company went public on NYSE under the ticker HAWK in May 2026, pricing its IPO at $26 per share with gross proceeds of approximately $416 million, which gives buyers a degree of financial transparency that most competitors cannot match. The constellation uses formation-flying clusters of exactly three satellites to enable Time-Difference of Arrival (TDOA) and Frequency-Difference of Arrival (FDOA) geolocation: the geometry of three co-orbiting receivers is what makes passive emitter geolocation possible without active transmission. As of March 2026, with Cluster 14 launched, the constellation has at least 42 active satellites across 14 clusters, plus the experimental Kestrel-0A satellite launched alongside Cluster 12. The technology page states “more than thirty satellites,” which is stale.

The product portfolio covers the main RF intelligence mission areas: RFGeo for signal geolocation mapping, RFIQ for raw in-phase/quadrature data aimed at analyst exploitation, Maritime Intelligence including the December 2025 Vessel Custody ID product that uses AI to maintain tracking continuity of high-interest vessels independent of AIS status, Spectrum Monitoring with taskable IQ data from space, GNSS Interference Detection, Air Defense Radar Monitoring, and Communications Mapping. Data is processed in AWS GovCloud and delivered via daily subscription downloads or a Collections API. The Mission Space platform provides a web-based analysis environment, and a HawkEye RF Data Explorer plugin is available for Esri ArcGIS users.

Named customers include the National Reconnaissance Office (NRO, relationship since January 2022), U.S. Navy INDOPACOM, NGA, NASA, and the Pacific Islands Forum Fisheries Agency. The 2025 acquisition of Innovative Signal Analysis (ISA) added advanced signal-processing algorithms, and a $125 million revolving credit facility closed in May 2026. The limitation to flag is pricing: no prices are published anywhere on the site, and all access is via government contract or data subscription requiring direct engagement. Read our in-depth HawkEye 360 review for a full breakdown of the product suite, constellation architecture, and government contract history.

2. Unseenlabs

Best for maritime RF/ELINT. Unseenlabs, registered as UNSEENLABS SAS, is a French company founded in 2015 by the Galic brothers, operating the BRO (Blue Ring Observation) monosatellite constellation from its base in Cesson-Sévigné, Brittany. Each BRO satellite independently intercepts electromagnetic signals from shipborne navigation and communication devices across approximately 300,000 km² per pass, and the collection is passive, multiband, and always-on regardless of weather or lighting conditions. As of May 2026, the constellation has 21 satellites in orbit (BRO-1 through BRO-21), with BRO-21 launched on May 3, 2026, and the company launching 3 to 6 new satellites per year. Geolocation accuracy is stated as kilometer-level. The data is ITAR-free, which matters for European and Asia-Pacific defense programs that cannot source from US-controlled suppliers.

Customers select an area of interest and a number of daily revisits; Unseenlabs delivers standard RF data files containing geolocation coordinates, timestamps, and RF technical parameters, compatible with standard GIS systems. Optional services include intelligence reports with deeper analysis, technical training, and a data visualization portal. Investors include defense-focused French funds Fonds Innovation Défense and Bpifrance Definvest alongside commercial VCs, which reinforces the company’s dual-use government-and-commercial positioning. The limitation to flag is self-serve access: no self-serve checkout or public pricing exists, all orders require contact or a demo booking, and the revisit frequency is described as “multiple times a day” without a published hourly figure that buyers can put into a service-level agreement.

3. Spire Global

Best for RF data at scale. Spire Global, Inc. (NYSE: SPIR) operates one of the largest multipurpose LEO satellite constellations in the world, with more than 100 Lemur-2 satellites in orbit, carrying multiple payloads per satellite across GNSS radio occultation, ADS-B aviation tracking, GNSS-R soil moisture, and RF geolocation. The Space Reconnaissance product line covers RF detection and geolocation across VHF (145-165 MHz), UHF (360-430 MHz), L-band (1-2 GHz), S-band (2-4 GHz), and X-band (8-12 GHz), using TDOA, FDOA, and Angle-of-Arrival (AoA) techniques. The satellite-solutions page states a revisit of under 30 minutes for the LEO constellation, though the exact revisit for a specific RF geolocation mission will depend on the number of satellites carrying that payload at any given time. Data is delivered as raw IQ or geoJSON via AWS GovCloud or S3 buckets, and post-processing options include audio extraction, tipping and cueing, correlation with third-party optical imagery, and device fingerprinting.

Named customers for RF and Space Reconnaissance work include NRO, NGA, NASA, NOAA, ESA, DLR, UK Space Agency, and Australian Office of National Intelligence. The platform also includes the Constellation Management Platform (CMP) for hosted-payload customers who want to deploy their own RF SDR payload on the Lemur bus, and optional double encryption ensures Spire cannot access a customer’s own data stream. Note that Spire divested its maritime AIS business to Kpler in April 2025, so Spire is no longer a maritime data vendor in the AIS sense. The limitation here is that RF geolocation is one payload type among several on the Lemur bus, and buyers who need a constellation dedicated exclusively to RF collection will find HawkEye 360 or Unseenlabs a more focused fit. Read our Spire Global review for the full breakdown of product lines, Space Services capabilities, and how the AIS divestiture reshaped the portfolio.

4. Horizon Technologies

Best for maritime SIGINT services. Horizon Technologies Consultants Limited is a UK small business founded in 1999 and headquartered in Reading, Berkshire, operating across three domains: the Amber space-based RF-SIGINT constellation, the FlyingFish and BlackFish airborne SIGINT systems, and the AmberPersistent terrestrial sensor product. The Amber constellation is designed as an always-on, untasked RF-SIGINT payload that continuously intercepts electromagnetic signals from maritime vessels, including L-band satellite phone traffic (Thuraya, Iridium), S-band and X-band maritime radar emissions, and AIS. A key differentiator is that Amber demodulates the signal content, not merely maps signal presence, which gives operators the satellite phone identifiers and radar fingerprints that pure-detection systems do not provide. Each satellite covers approximately 12 million square kilometers continuously, equivalent to roughly 3 percent of Earth’s surface, with 3 to 12 looks per day per satellite.

The Amber programme carries real uncertainty worth flagging clearly: the original Amber-1 payload was lost on the Virgin Orbit Spaceport Cornwall launch failure of January 9, 2023. Amber-2 (the Phoenix Mission, funded with a £1.2 million UK Space Agency grant as part of a £2.8 million total programme) passed Critical Design Review in 2024 and was scheduled for a 2025 launch. Amber-3 was also planned for 2025. As of the most recent data available for this guide, neither an Amber-2 nor an Amber-3 launch had been confirmed publicly. Named customers include the Royal Navy via the Joint Maritime Security Centre, US and UK government clients for AmberPersistent terrestrial contracts in 2024, a Middle East government for a BlackFish contract, and NATO for a December 2025 BlackFish order. The limitation is the constellation status uncertainty: buyers should confirm with Horizon Technologies directly whether Amber-2 or Amber-3 is operational before relying on space-based Amber data for a program timeline.

5. Sfera

Best for RF/ELINT bundled with multi-modal imagery in one contract. Sfera Technologies Ltd. is a data aggregator founded in 2019 and headquartered in Sofia, Bulgaria. It does not operate satellites but routes access to multiple third-party constellations under a single commercial agreement. RF and ELINT data comes from Unseenlabs’ BRO constellation, which is the same space-based RF asset that ranks second on this list as a direct operator. The reason Sfera ranks fifth rather than higher is that its RF capability is entirely derivative of Unseenlabs, and buyers who need only RF data will get better pricing and more direct service-level discussions by going to Unseenlabs directly. Where Sfera earns its place is the single-contract access to optical (0.3 to 3.2 m), SAR (X-band from Capella Space and others), thermal (MWIR and LWIR), hyperspectral (31 bands, 5.3 m), and RF in one platform, which no other entry on this list offers.

Optical pricing is transparent and published per km² on sfera.earth, starting at $4/km² for 1.0 m archive (minimum 25 km²) and reaching $30/km² for 0.3 m daily tasking (minimum 100 km²). SAR, thermal, hyperspectral, and RF are all quote-based with no published prices. The app.sfera.earth web interface includes a feasibility tool for SAR tasking. Sfera also operates a standalone ground station network of 12 active sites across Europe, the Middle East, Asia, the Americas, Africa, and Oceania, available to third-party satellite operators at €3/minute via API, which adds a genuine infrastructure differentiator. The limitation is that Sfera has no named reference customers published, which makes it harder for buyers building a mission-critical program to assess service continuity risk. Read our Sfera review for a detailed look at each sensor modality, the platform interface, and the ground station service.

How to choose an RF intelligence provider

The first question to answer before comparing any specs is whether RF intelligence is actually the right tool for your use case. Most commercial EO buyers need imagery, and RF data answers a different set of questions: where is this emitter, what signals is that vessel broadcasting, is this device spoofing its GPS coordinates. If your question is “show me what that facility looks like,” you need optical or SAR. If your question is “is that ship transmitting on a frequency it should not be,” you need RF.

Dedicated RF vs. multipurpose constellation

HawkEye 360 and Unseenlabs both operate constellations built exclusively for RF geolocation. That single-purpose design means the entire constellation architecture, from satellite formation geometry to signal processing pipeline, is optimized for RF. Spire’s Lemur-2 platform is more versatile: the same satellite bus carries weather, aviation, and RF payloads, which means the constellation is large and the revisit is fast, but the specific number of satellites with RF geolocation capability is not broken out separately. For buyers who need dedicated RF collection with a published constellation architecture, HawkEye 360 or Unseenlabs are the cleaner choices. For buyers who also need weather data or ADS-B flight tracking from the same subscription, Spire becomes compelling.

Raw data vs. finished intelligence

HawkEye 360 offers both raw signal geolocation data (RFGeo, RFIQ) and processed analytics products (Maritime Intelligence suite, Spectrum Monitoring, GNSS Interference Detection). Unseenlabs delivers data files with geolocation coordinates, timestamps, and RF technical parameters, with optional intelligence reports as an add-on. Horizon Technologies goes further: the Amber system demodulates the signal content, providing the actual satellite phone identifiers and radar fingerprints rather than just a location fix. That level of exploitation is genuinely different from what the other operators offer, but it comes with the caveat on constellation operational status discussed in the profile above. Spire delivers raw IQ and geoJSON with post-processing options available as services. Buyers who need finished intelligence rather than raw data files should weight Horizon Technologies and HawkEye 360’s analytics products most heavily.

ITAR status and national market constraints

Unseenlabs explicitly markets its data as ITAR-free and commercially accessible beyond government and public-sector entities, which is a stated differentiator on the company’s technology page. Horizon Technologies describes Amber as non-ITAR. HawkEye 360 and Spire Global are US companies; their ITAR status for international commercial sales is not stated on their public sites, and buyers in non-US markets should confirm export-control implications before committing. For European and Asia-Pacific programs with ITAR-free procurement requirements, Unseenlabs is the most clearly positioned option.

Budget scale and program horizon

No provider on this list publishes prices for RF data or intelligence services. All access is via subscription, government contract, or quote. HawkEye 360 and Spire are publicly listed companies with audited financials, which provides a degree of counterparty stability for multi-year programs. Unseenlabs has raised €112.5 million in total with defense-focused investors, and its growing constellation (3 to 6 new launches per year) signals ongoing investment. Horizon Technologies is a smaller private company; its constellation is rebuilding after the Virgin Orbit setback, which is a real timeline risk for programs that need space-based data now. Sfera is early-stage and private, with no published reference customers, making it best suited to programs where the multi-modal access model is more valuable than counterparty scale.

Verdict

HawkEye 360 earns the top spot because it is the only provider here that combines a dedicated multi-cluster formation-flying RF constellation (42+ satellites as of early 2026), a public company balance sheet (NYSE: HAWK, IPO May 2026), a proven government customer base across NRO, U.S. Navy, and NGA, and a range of productized analytics that go well beyond raw signal delivery. The combination of constellation scale, financial transparency, and analytics depth does not exist anywhere else on this list at press time.

Unseenlabs is the right answer for maritime-domain-awareness buyers, particularly outside the United States. Its 21-satellite constellation is ITAR-free, focused exclusively on maritime RF, and continuously growing at 3 to 6 launches per year. The kilometer-level geolocation accuracy is not precision RF geolocation in the HawkEye 360 sense, but for dark-ship detection and AIS validation it is the clearest European-sourced option.

Spire Global is worth evaluating for programs that need RF geolocation as part of a broader data subscription covering weather, aviation, and space services from a single platform. Its constellation is large and the revisit is fast, but RF is one payload type among several, not the primary mission. Horizon Technologies is uniquely capable on signal demodulation and maritime SIGINT service depth, but buyers should confirm current Amber constellation status before building a program around it. Sfera belongs on the shortlist only when the requirement spans RF plus optical, SAR, thermal, and hyperspectral in one contract, where no other provider here competes.

Frequently asked questions

These answers cover the most common decision points when evaluating an RF intelligence provider for the first time.

What is RF intelligence from space?

Space-based RF intelligence is the collection and geolocation of radio-frequency emissions from orbiting satellites, typically using techniques such as Time-Difference of Arrival (TDOA) and Frequency-Difference of Arrival (FDOA) to locate the source of a signal on Earth without any cooperation from the emitter. It is distinct from optical or SAR imagery because what it detects is electromagnetic emissions, not reflected light or radar backscatter. See the “How we picked” section for the criteria that distinguish an operational RF intelligence provider from a generalist analytics layer.

How does RF geolocation work from a satellite constellation?

The most common commercial approach uses formation-flying satellites: when an RF emitter on the ground transmits, the signal reaches each satellite at a slightly different time and frequency (due to orbital motion). By comparing those timing and Doppler-shift differences across two or more satellites, the constellation can triangulate the emitter’s location. HawkEye 360’s clusters of three formation-flying satellites are designed specifically for this geometry, enabling TDOA and FDOA geolocation simultaneously. For more technical context, see the “Dedicated RF vs. multipurpose constellation” section.

What is the difference between RF geolocation and AIS?

AIS (Automatic Identification System) is a cooperative transponder system: a vessel broadcasts its identity, position, course, and speed, and AIS receivers (including space-based ones) pick that up. RF geolocation is non-cooperative: it locates a vessel by detecting the radar or satellite-phone emissions the ship produces, regardless of whether the AIS transponder is on or off. Dark vessels that disable their AIS to avoid detection still emit radar and communications signals, which is why RF intelligence is the primary tool for maritime domain awareness of non-cooperative targets. See the “Raw data vs. finished intelligence” section for how providers differ in what they deliver.

Which RF intelligence providers are ITAR-free?

Unseenlabs explicitly states its data is ITAR-free on its technology page, and Horizon Technologies describes its Amber product as non-ITAR. HawkEye 360 and Spire Global are US companies; their export-control position for international commercial programs is not stated on their public sites and requires direct confirmation. Sfera is a Bulgarian company but its RF data comes from Unseenlabs, so the ITAR-free status of the underlying data is inherited from the source operator. For the full comparison, revisit the “RF intelligence providers compared” table.

Is RF intelligence available to commercial buyers without a government contract?

Yes, though access varies by provider. Unseenlabs explicitly positions its data as commercially accessible beyond government and public-sector entities, and Horizon Technologies has commercial subscribers for its Amber data service. HawkEye 360 and Spire both serve commercial customers, with data accessible via subscription and API respectively. Sfera routes RF access through its commercial platform with an imagery order workflow. The practical constraint for commercial buyers is pricing opacity: none of these providers publishes RF data prices, and all require a sales engagement or demo booking before any numbers appear. See the “How to choose” section for guidance on matching the right provider to your use case.

Sebastian Holt

My passions are Earth Observation and Satellites, and my profession is Data Analysis. I combine both within ObservationData.com to show you the use cases of Earth Observation, to help you find the right provider, and to share your experiences.