GET /v1/inventory · 847ms · 12,440 results · LIVE POST /v1/booking · 1.2s · LH4478 BER→AMS · CONFIRMED AGENT disruption-watch · CDG delay +3h · ALT DRAFTED GET /v1/profile/ctx · 312ms · seat 14A · HIT PATCH /v1/booking/mgmt · rebook SQ307→EK221 · EXECUTED GET /v1/inventory · 847ms · 12,440 results · LIVE POST /v1/booking · 1.2s · LH4478 BER→AMS · CONFIRMED AGENT disruption-watch · CDG delay +3h · ALT DRAFTED GET /v1/profile/ctx · 312ms · seat 14A · HIT PATCH /v1/booking/mgmt · rebook SQ307→EK221 · EXECUTED
Series A Confidential

Raile

The travel tech spine your product is missing. One API. Full booking stack.

Round
Series A
Amount
€50M
Lead
a16z
// Live right now
2,400,000+ API calls today
8 platforms integrated
38 countries live
87% trips: zero human touch
// Google contract: active exploration
status: due_diligence · Q3 2026
01 · Problem

Every AI travel product ends with a redirect.

The builders are there — OpenAI, Gemini, Layla, Mindtrip, Salesforce. The AI layer is sophisticated. The intent engine is sharp. But the moment the user wants to book, there is no supply layer to call. Every experience ends with a link to an OTA.

The session breaks. The data disappears. The relationship ends. The incumbent captures the transaction. The builder captures nothing.

The trust gap
89
point NPS gap between AI-native travel experiences and OTA booking completions
Users trust the AI recommendation. They don't trust the OTA redirect. The redirect is the product failure.
02 · Market size

$1.61 trillion market. The infrastructure layer is unclaimed.

Total market
$1.61T

Global travel spend. Flights, hotels, rail, ground. Growing at 8.4% CAGR through 2030.

Serviceable segment
$180B

Bookings made through digital platforms and apps — the B2B builder layer. Currently captured by OTA affiliates and redirect links. Raile replaces the redirect.

Raile target (5-year)
$8.5B

Bottom-up: 10M bookings/year at €47 average fee × 18 integrated platforms at target. Conservative against the $180B serviceable segment.

Booking.com market cap
$150B+
AI travel startups funded (2025)
400+
% with own booking supply
~3%
03 · Why now

Three forces converging in 2025–26.

01

Agentic AI goes mainstream

Every major AI platform — OpenAI, Gemini, Anthropic, Perplexity — is building or acquiring agentic travel capabilities. The agents are ready. The booking infrastructure isn't. Raile closes that gap at exactly the moment it opens.

02

Generative search disrupts OTA traffic

Google SGE, Perplexity, and ChatGPT are absorbing the top-of-funnel that OTAs built on SEO. As search traffic collapses for incumbents, the opportunity to own the booking layer through direct API integration compounds quarterly.

03

Traveller behaviour shift: in-app completion

Under-35 travellers now expect to complete a booking inside the product that recommended it — not in a separate browser tab. This isn't a preference. It's a conversion mechanic. Products that redirect lose the booking. Every quarter this is more true.

04 · The product

One API. The full booking stack.

A developer at Layla calls four endpoints. Their users book flights, hotels, and rail without ever leaving the Layla app. The traveller's preferences carry across every platform they use. If the flight is cancelled at 2am, the disruption agent rebooks them before they wake up.

GET /v1/inventory Live supply · any source
GET /v1/profile/ctx Persistent traveller context
POST /v1/booking End-to-end confirmation
PATCH /v1/booking/mgmt All CRUD · disruption handling
// Real call · Layla production · 2026-04-20
POST /v1/booking
{
"origin": "AMS",
"destination": "NRT",
"traveler_id": "usr_k9X2mP",
"class": "business"
}
→ 200 OK · 1,204ms
{
"booking_id": "bkng_7wRt4Q",
"status": "CONFIRMED",
"carrier": "NH · Seat 3A",
"hotel": "Aman Tokyo · 2 nights",
"disruption_watch": true
}
// User never left the Layla app.
05 · Traction

Numbers that matter.

2.4M
API calls / day
↗ 340% YoY
8
platforms integrated
Layla · Mindtrip · Salesforce + 5
87%
trips without human touch
up from 71% 6 months ago
NPS 71
among builder customers
Net retention: 148%
Pipeline

Google contract in active exploration. OpenAI travel vertical in discovery. 12 qualified enterprise integrations in Q3 pipeline.

Revenue signal

€47 per completed trip. Current run-rate: €28M ARR. Target post-Series A: €400M ARR in 18 months (10M bookings processed).

06 · Moat

Why Booking.com can't copy this.

Three structural reasons. None of them are features.

01
Their brand is the consumer surface. The API is the threat to their brand.

Booking.com's moat is the consumer relationship — the app, the trust signal, the review ecosystem. A developer-first, white-label booking API destroys that moat by design. They can build the API, but every successful integration is a traveller who books inside Layla instead of Booking.com. The incentive to build Raile is the incentive to cannibalise their core business. They won't.

02
27,000 people optimised for a different operating model.

Raile runs 42 people against the same product surface because the agents absorb the functions that Booking.com runs with teams of 40–200. The category managers, the onboarding floors, the SEO operations — these are not inefficiencies at Booking.com, they are the operating model. Replacing them with agents requires dismantling the org while the org is still running. No incumbent does this successfully.

03
The traveller profile compounds across platforms. Booking.com can only see their own data.

Raile's profile agent holds cross-platform traveller context — preferences, behaviour, history — aggregated across every integration. The profile gets richer with every booking on any Raile-powered product. Booking.com can only see bookings made on Booking.com. The network effect compounds in Raile's favour every quarter and there is no structural path for an incumbent to replicate a cross-platform profile without partnering with their competitors.

07 · Team

Built this before. In adjacent spaces.

Jonas Berglund
CEO & Co-founder
Previously: Stripe (Head of API Platform, €0→€5B)

Built the Stripe API platform that processes $1T annually. Knows what developer-first infrastructure looks like at every scale.

Priya Menon
CTO & Co-founder
Previously: Amadeus (Principal Architect, GDS core infrastructure)

Knows the GDS stack inside out. Knows where the legacy breaks. Built the supply aggregation layer that powers Raile's inventory agent.

Luca De Santis
CPO & Co-founder
Previously: Wise (VP Product, cross-border infrastructure)

Scaled Wise's product from 1M to 16M customers. Obsessed with reducing friction at every handoff. The profile agent was his.

Yael Hartmann
VP GTM
Previously: Twilio (first enterprise sales lead, EMEA)

Signed Twilio's first 40 enterprise contracts. Knows how to land API platforms in regulated and high-stakes product teams.

08 · The ask

€50M Series A. Led by a16z.

This round gets us to 10M bookings processed, 8 platforms fully integrated, and the Google contract closed. At that scale, the network effect on the traveller profile becomes the primary moat. No new entrant builds that profile in under three years.

Engineering (agent infrastructure) 40%
GTM + Field Ops expansion 30%
Supply partnerships + GDS access 20%
Working capital + compliance 10%

18-month milestones

10M
Bookings processed. The threshold at which the traveller profile becomes a durable network asset.
8 platforms
Fully integrated, including Google contract in active exploration closed. Each platform adds supply to the profile layer.
€400M
ARR. €47 × 10M bookings. The unit economics are locked — this is a volume execution milestone, not a pricing bet.
Appendix · Reference facts

Numbers we stand behind.

Global travel market
$1.61T

WTTC Global Economic Impact 2025. Includes all travel spend: air, accommodation, ground, rail. Growing at 8.4% CAGR.

NPS trust gap
89 points

Difference in traveller NPS between AI-native in-app booking completion (NPS +74) and OTA redirect completion (NPS −15). Source: Skift Research / Morning Consult 2025.

AI-native VC share
45%

Of global VC dollars deployed in 2025 went to AI-native startups. Source: PitchBook Q4 2025 Global Venture Report. Travel infrastructure is the fastest-growing sub-sector.

Booking.com market cap
$150B+

Booking Holdings market cap (April 2026). 27,000 employees. $21.4B revenue. The size of the prize for the infrastructure layer underneath them.