Flock Safety vs Axon: Plate Reader Comparison and Privacy Differences

According to the American Civil Liberties Union (ACLU), Flock Safety runs a shared national lookup network with cloud-only storage and a 1-year retention cap, while Axon shares data only through department-by-department agreements, offers local installation, and has no hard retention cap. Both vendors sell automated license plate reader (ALPR) systems to police departments, and the ACLU says both access the FBI's NCIC. Choosing between them involves different tradeoffs regarding data retention, search capabilities, and network exposure.

Flock Safety vs Axon at a Glance

Comparing automated license plate reader vendors requires evaluating network boundaries, storage locations, search software, and retention rules. The following table contrasts Flock Safety and Axon based on vendor documentation and civil liberties research.

Sharing: National Lookup vs Agreement-Based

Flock Safety connects police agencies through an interconnected National Lookup network. The ACLU says about 75% of Flock's roughly 5,000 police customers take part in this shared pool. Flock says it has "+12,000 customers across the US" and logs ">20B reads/month across 49 states."

Axon handles data sharing through isolated agreements rather than a default shared network. Under Axon's model as the ACLU describes it, sharing happens only where departments agree to it through explicit department-by-department pacts. Flock's comparison page also says Axon's sharing "is limited to agency-specific data/ecosystem; no shared national network."

Retention Caps and Agency Limits

Retention rules set how long plate reads are stored. The ACLU says Flock defaults to 7 days with a 1-year cap, while Axon allows indefinite retention at the customer's discretion. Flock's explainer states that "By default, data automatically deletes after 7 days unless local law requires something different."

Actual retention periods vary widely by agency and local statutory mandates. For example, Kent County, Michigan's Flock page says images are kept "for 30 days unless lawfully preserved." In Washington State, Senate Bill 6002 was signed in late March 2026, which keeps plate-reader data 21 days unless it is needed as evidence. That law also bans collection near schools, courts, food banks, places of worship, immigration facilities, and protected health facilities, while requiring agencies to keep access logs for two years.

Without a local retention limit, Axon plate data could be kept for years. Motorola also allows indefinite retention at customer discretion with no hard cap, according to the ACLU.

Artificial Intelligence Search and Vehicle Fingerprint

Search tools let investigators locate specific vehicles using visual traits instead of verified plate numbers. Flock markets a patented "Vehicle Fingerprint" search that filters by body type, make, color, roof racks, bumper stickers, damage and after-market changes, and finds vehicles with a partial or missing plate. Flock's comparison page also claims its system reads paper, temporary, and covered plates.

Flock states that its hardware does not track human beings. Flock says its cameras "focus on vehicles, not people" and "do not use facial recognition." Kent County, Michigan's transparency page notes that its Flock system captures still images of the vehicle rear and plate, alongside date, time, and location, and "does not provide live video, audio recording, facial recognition, or continuous GPS tracking."

The ACLU says Axon offers structured vehicle-attribute search, whereas the ACLU describes Flock as offering free-form artificial intelligence search of imagery. Flock's comparison page claims its system "Blocks searches tied to prohibited uses."

Storage and Hardware Deployments

The ACLU says Flock is cloud-only, while Axon offers local installation options. Flock's contract terms state that "all right, title, and interest in and to Customer Data belong to and are retained by Customer" and "Flock shall not sell Customer Data."

Flock describes its Falcon camera as solar-powered, motion-activated, "infrastructure-free," connected over LTE, and working 24/7 in any weather. A Sussex County, Virginia page says the Falcon Flex weighs under 5 pounds, runs on a solar panel of 60W or less, and has a "covert industrial design." Flock says it takes roughly "6 to 12 or so pictures of a vehicle as it passes by" and that its cameras "do not currently measure vehicle speed."

Axon Fleet 3 is Axon's in-car video system with built-in ALPR. For fixed locations, Flock's comparison page says Axon's fixed Outpost "was announced in April 2025" and units were "still in field trials." Whether Axon's fixed units use solar power or other configurations is not published in our sources.

Federal Hotlists and ICE Access

Both vendors connect municipal police departments to national law enforcement registries. The ACLU says both Flock and Axon access the FBI's NCIC, including ICE's "Immigration Violator" hotlist.

Flock states that it does not contract directly with immigration officials. Flock says: "Flock does not work with U.S. Immigration and Customs Enforcement (ICE)," "Flock does not have a contract with ICE," and says ICE has no direct access "unless the agencies that control their data expressly and deliberately allow it." Flock adds that federal sharing is off by default, and that since January 2026 agencies can turn off all federal sharing "with a single toggle in Admin Settings." Flock lists past federal pilots with the Federal Bureau of Investigation (FBI) from 2021 to 2023, the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), Naval Criminal Investigative Service (NCIS), Homeland Security Investigations (HSI), and U.S. Customs and Border Protection (CBP). Flock says it announced in August 2025 that it would no longer conduct pilot projects with federal agencies, and says federal agencies are not part of statewide or national lookup networks.

Federal access has drawn official action against Flock in Illinois and preceded Lynnwood, Washington's cancellation. In August 2025, Illinois Secretary of State Alexi Giannoulias said Flock broke a 2023 Illinois law banning sharing of plate-reader data to enforce immigration or abortion-related laws by giving U.S. Customs and Border Protection access to Illinois data through a pilot; Flock's CEO said "We clearly communicated poorly," paused federal pilots, and disagreed with the legal claim. Furthermore, 404 Media reported more than 4,000 nationwide and statewide lookups by local and state police tied to ICE or immigration, found in public records from the Danville, Illinois police department; officers typed reasons such as "immigration," "ICE" and "ICE WARRANT," with ICE having no Flock contract and working through local police.

Civil liberties groups have also identified broad queries across Flock networks. The Electronic Frontier Foundation (EFF) reviewed records of more than 12 million searches by more than 3,900 agencies between December 2024 and October 2025, finding hundreds tied to protests (50501, Hands Off, No Kings). The EFF also documented a Johnson County, Texas search connected to a woman's self-managed abortion that reached 6,809 networks and 83,345 cameras.

Why Contract Terms Matter More Than the Vendor

The ACLU said in August 2026 that contract terms matter more than vendor choice when municipalities procure automated license plate readers. Municipalities should write restrictions into the contract rather than relying on standard commercial settings.

The ACLU's advice for any contract includes four specific provisions:

• Retention of 48 hours at most, per the ACLU.
• No nationwide sharing, per the ACLU.
• No federal access, per the ACLU.
• No AI analytics, per the ACLU.

Legal challenges over plate reader deployments are progressing in state and federal courts. In Norfolk, Virginia, residents Lee Schmidt and Crystal Arrington, represented by the Institute for Justice, challenged 176 Flock cameras. On January 27, 2026, federal judge Mark Davis ruled for the city, writing that ALPR surveillance "could become too intrusive... at some point" but "at least in Norfolk, Virginia, the answer is: not today," even though Schmidt's car had been photographed 475 times in 4.5 months; the plaintiffs said they would appeal. In Wisconsin, a lawsuit filed September 10, 2026 by the Wisconsin Institute for Law & Liberty and others against Waukesha County and 11 municipalities asks that police get a warrant before searching Flock data, with emergency exceptions; it cites the US Supreme Court's June 2026 decision in United States v. Chatrie, which it describes as finding a Google location-data search was a Fourth Amendment search.

Who This Technology Does Not Suit

Neither vendor suits municipalities or communities that want to eliminate warrantless tracking of civilian travel. Several cities have recently canceled contracts after public scrutiny.

Lynnwood, Washington voted 7-0 on February 23, 2026 to cancel its Flock contract, after reporting that out-of-state and federal agencies had searched the network for immigration enforcement. In Asheville, North Carolina, the city council voted 5-2 on August 25, 2026 to terminate its Flock contract, ordering hardware removed and data sharing suspended. Harrisonburg, Virginia's council voted 4-0 in July 2026 to end its Flock contract. The EFF reports that Austin, Evanston, and Eugene also canceled or refused to renew Flock contracts.

Cost has also come up. In Lynchburg, Virginia, where each camera costs about $3,000 a year, the amended contract carries a $500 early-termination charge per device removed, and council members proposed an audit and a warrant requirement in August 2026. In Cortland, Ohio, where 10 cameras cost $3,000 per camera, the city announced on September 2, 2026 that it would not renew its Flock contract, citing "a lack of funding."

Verdict on Flock Safety and Axon

Neither vendor provides a privacy-safe deployment. Flock's National Lookup network, which the ACLU says about 75% of its police customers join, lets outside agencies search local reads across a shared national pool. The ACLU says Flock caps retention at 1 year, whereas Axon allows indefinite retention at the customer's discretion without a hard cap. Meanwhile, Axon Fleet 3 has built-in ALPR, and the ACLU says Axon also accesses the FBI's NCIC.

Our verdict would change if a vendor built in the ACLU's terms by default: retention of 48 hours at most, no nationwide sharing, no federal access, and no AI analytics. Until vendors automate those protections, privacy protections depend on local contracts and city ordinances. Residents and officials evaluating these vendors should check their local department's contract terms and public-records audit logs to verify current retention, sharing agreements, and federal database toggles.

FAQ

Is Axon better than Flock for privacy?

Axon avoids a shared national lookup network, but the ACLU says it has no hard retention cap, while Flock caps at 1 year. The ACLU says both Axon and Flock access the FBI's NCIC, and that contract terms matter more than vendor choice.

Does Axon have a national network like Flock?

No. The ACLU says Axon's sharing requires "explicit department-by-department agreement," not an automatic national network. Flock runs an interconnected National Lookup network connecting participating agencies across the country.

How long does Axon keep plate data?

Unless local policy or state law sets a limit, the ACLU says Axon allows indefinite retention at the customer's discretion. In contrast, the ACLU reports that Flock defaults to 7 days and enforces a 1-year maximum retention cap.

Is Axon replacing Flock in some cities?

Our sources do not say whether cities are switching to Axon. Lynnwood, Washington, Asheville, North Carolina and Harrisonburg, Virginia voted to end Flock contracts; Lynnwood's vote followed reporting on immigration-related searches.

What should a city require from any plate-reader vendor?

The ACLU advises: retention of 48 hours at most, no nationwide sharing, no federal access, and no AI analytics. City councils should write these limits directly into procurement contracts regardless of which vendor is chosen.

External sources for further verification:

• ACLU analysis of ALPR vendors, retention, and sharing policies
• Sussex County Sheriff's Department Flock Safety documentation
• Kent County Sheriff's Office Flock Transparency Portal
• Flock Safety vs Axon vendor comparison portal
• Flock Safety explanation of camera data capture
• Flock Safety customer data ownership terms
• Flock Safety policy statement on federal agency and ICE sharing
• Electronic Frontier Foundation review of ALPR surveillance searches
• Axon Fleet 3 in-car video system announcement