Cirium
Aviation data provider selling flight, fleet, and airline analytics, owned by RELX.
On the record
Checkpoint: RELX H1 2026 earnings reveal Risk division growth trajectory
The call
Cirium sits inside a growing parent and holds data relationships that are slow to copy, but generic AI and OAG both press on the reporting layer it sells.
Cirium collects detailed information about aircraft, flight schedules, and airline operations from thousands of direct sources and sells that data to airlines, airports, and travel companies. It is hard to replace because it has spent 15 years building trust relationships with 900 airlines and regulators, and competitors cannot quickly rebuild those connections or get the same access. The main threat is that general artificial intelligence tools could let customers ask questions about the data themselves instead of paying Cirium for reports, though Cirium is fighting back by adding its own AI assistant on top of its proprietary data. The key thing to watch is whether OAG, a rival with similar airline schedule data, undercuts Cirium on price or whether Cirium's parent company (RELX) continues to invest in growing the division.
Why
01
AI pressure: Generic LLM assistants and airline-built internal tools. Chatbots could answer flight-status questions directly, cutting demand for dashboards if airlines skip the middleman. Could AI do the core job? Unlikely.
02
Bigger players: OAG and FlightAware. Both sell overlapping schedules and tracking data; OAG is the one rival with comparable depth to squeeze Cirium on price. Could a giant copy it? No, they are blocked.
03
What protects it. Fifteen-plus years of direct data deals with 900+ airlines and lessors, embedded into their reporting workflows, hard to rebuild fast.
What would change this call
OAG announces new airline, lessor, or insurer contracts overlapping Cirium's core accounts. Would show the closest peer is actively taking share in Cirium's core segments.
RELX Risk division growth rate in H1 2026 earnings (around July/August 2026). Flat or declining growth would signal weakening demand or internal deprioritization of Cirium's segment.
Airlines announce direct data feeds to AI platforms bypassing Cirium/OAG-style intermediaries. Would show the described AI-driven disintermediation threat becoming real rather than hypothetical.
RELX Risk division growth rate in H1 2026 earnings (around July/August 2026). Flat or declining growth would signal weakening demand or internal deprioritization of Cirium's segment.
Airlines announce direct data feeds to AI platforms bypassing Cirium/OAG-style intermediaries. Would show the described AI-driven disintermediation threat becoming real rather than hypothetical.
Key numbers
- RELX Risk division revenue grew 8% underlying
- Cirium tracks 900+ airlines, ~99% of scheduled flights
- Cirium headcount roughly 400-420 people
Named risks
- Generic LLM assistants could commoditize descriptive reporting and ad-hoc querying layer over time.
- OAG could squeeze Cirium on price or steal share in schedules segment where assets overlap most.
- Flat headcount (~400-420) and 14% QoQ web traffic drop suggest stagnating growth momentum.
- Lack of disclosed standalone financials makes independent verification of health difficult.
- Airlines could eventually feed data directly to generic AI platforms, bypassing data vendors like Cirium.
Rivals, as read in July 2026
| Rival | Direction | Evidence |
|---|---|---|
| OAG | contesting | Closest peer with genuinely comparable schedules data; no reported account losses as of 2026-06 |
| FlightAware | contesting | Competes via AeroAPI and Foresight predictive analytics; no overlap in core accounts reported as of 2026-07 |
| Flightradar24 | contesting | Competes in flight tracking but positioned more consumer facing versus Cirium's enterprise focus |
| ATPCO | losing to | Airline-owned fare-filing body holds a structural monopoly Cirium cannot penetrate, per 2026-05-22 analysis |
Questions people ask
- Is Cirium owned by RELX?
- Yes. Cirium sits inside LexisNexis Risk Solutions, a division of RELX PLC, and has never raised outside funding as a standalone entity. RELX's Risk division, which includes Cirium, grew underlying revenue 8% and underlying adjusted operating profit 10% as reported in RELX's 2025 results on 2026-07-13.
- Is Cirium profitable?
- Cirium does not disclose standalone financials since it is a unit within RELX PLC, not a separately reporting company. Its parent's Risk division, which houses Cirium, reported underlying adjusted operating profit growth of 10% in RELX's 2025 results published 2026-07-13, but no Cirium-specific profit figure exists.
- Could AI replace Cirium?
- Unlikely to fully replace it. Cirium's moat is proprietary licensed data from 2,000+ sources and 900+ airlines built over 15+ years, which generic LLMs cannot scrape. Cirium ships its own GenAI tools, OTP Awards AI launched 2025-01-09 and Olivia in beta, layered on top of that data rather than being displaced by it.
- Who is Cirium's biggest competitor?
- OAG is considered Cirium's closest peer with genuinely comparable schedules data assets. Other rivals include FlightAware (AeroAPI, real-time tracking) and Flightradar24. As of mid-2026 there is no evidence any of them has taken Cirium's core airline, lessor, or insurer accounts.
- Is Cirium a safe company to join in 2026?
- Reasonably stable but not high-growth. Cirium employs roughly 400 to 420 people as of 2025-06-06, with headcount up about 5% year over year per Crustdata's 2026-06-19 tracking, though web traffic dropped 14% quarter over quarter, giving it a modest Growth Score of 6/100.
- Is Cirium being sold or spun off by RELX?
- No evidence of divestiture as of this brief. RELX reported five acquisitions totaling £270m in 2025 and announced a £2,250m share buyback for 2026 in its 2025 results published 2026-07-13, signaling continued bolt-on M&A appetite rather than any sale of Cirium.
Timeline
- 2026-04Cirium adds ex-Spirit CEO Ben Baldanza and ex-IndiGo CCO Willy Boulter to OTP Advisory Board
- 2026-02RELX Q4 earnings call: Lexis+ AI subscribers more than doubled, ~300 group AI workflows (vendor-claimed)
- 2025-11Cirium and AFRAA announce African aviation data partnership
- 2025-11Owler reports Cirium/Awery ERP integration partnership
- 2025-07Cirium launches first Annual Flight Emissions Performance Review, EmeraldSky ranking used by EU Commission
- 2025-07Cirium unveils OTP Improvement AI assistant Olivia in beta
- 2025-01Cirium launches OTP Awards AI, industry-first GenAI assistant for on-time performance
- 2025-01Cirium announces Aerlytix partnership for aviation finance analytics
- 2019FlightGlobal data and analytics assets rebranded as Cirium after publishing arm sold to DVV Media
Revision history
21 July 2026
First assessed. Hard to displace. The text above is fixed as of this date and is not edited afterwards.
In the same band
Sources
- RELX 2025 Results (2026-07-13)
- Cirium Revenue, Funding & Valuation
- Cirium's Competitors, Revenue... (2025-11-30)
- How Aviation Data Powers Travel & Finance (2026-05-22)
- Careers in aviation data, Cirium (2025-06-06)
- Cirium, Headcount, Funding & Open Jobs (2026-06-19)
- LinkedIn, Cirium (2026-03-17)
- Cirium Launches Industry-First GenAI Assistant (2025-01-09)
- Cirium Launches First Annual Airline Emissions Ranking (2025-07-25)
- Aerlytix partnership (2025-01-22)
- Cirium and AFRAA Data Partnership (2025-11-20)
- Cirium Adds Former Airline C-Suite Leaders (2026-04-03)