Engine Finds Big Growth by Putting Controls Around Unmanaged SME Travel
How Engine Found Big Growth in the Small Business Travel Industry
Ten years ago, Engine was a side project inside a corporate housing company, created to help guests find hotel rooms. Today, it is a multibillion dollar travel platform focused on one specific gap in the market: small and midsize companies that have real travel volume but no formal travel program.
By combining an easy online booking experience with controls that usually belong inside a managed travel program, Engine has turned that gap into its main growth driver.
From corporate housing helper to independent travel platform
Engine’s roots go back to Travelers Haven, a Denver based corporate housing firm that built Hotel Engine in 2015 so its guests could book hotels under a single umbrella. The hotel tool proved strong enough to stand on its own and was spun out as a separate company a few years later.
Since then, Engine has raised several funding rounds, including a 140 million dollar Series C in 2024 that valued the company at about 2.1 billion dollars. Founder Elia Wallen moved over from Travelers Haven to lead Engine full time in 2020, and Travelers Haven itself was later acquired by apartment provider Blueground in 2023.
Engine has also scaled headcount quickly, growing from roughly 700 employees at the start of 2025 to more than 1,000 by late summer, reflecting both product expansion and aggressive sales hiring.
Bridging OTAs and TMCs for small and midsize companies
Engine positions itself between consumer style online travel agencies and traditional travel management companies. The goal is to give smaller organizations a modern self service booking platform while still delivering policy controls, centralized billing, and reporting that look more like a managed program.
On the content side, Engine has direct partnerships with many of the largest global hotel brands, along with major North American property management groups. The company says this mix gives it exclusive or preferred rates at tens of thousands of hotels and is drawing a large number of new travelers onto the platform each month.
Many of those customers have never worked with a travel management company. Others left TMC contracts behind and now want a tool that provides structure without the overhead of a fully managed program. According to Engine executive vice president of supply, product, and strategy Florent Silve, the company usually does not run into TMCs in competitive bids, because its clients either have no travel manager or only a part time travel owner in finance or HR.
Covid as a turning point for unmanaged programs
The Covid pandemic became a major inflection point. Before 2020, many of Engine’s customers had a person or small team explicitly responsible for travel. When those roles were cut, travel tasks fell to people whose main jobs were elsewhere.
Silve notes that this created the exact conditions where Engine thrives. These are companies with meaningful hotel and flight volume, little appetite for a full TMC relationship, and overstretched internal staff trying to manage bookings, invoices, and policy by hand. Engine’s mix of self service tools, controls, and consolidated billing gives those teams a way to act like a managed program without rebuilding an entire travel department.
Beyond hotels: flights, cars, and flexible protection
As customer demand widened, Engine dropped the word Hotel from its name and expanded into flights and rental cars. Air and car content now comes from a blend of direct supplier connections, aggregators, global distribution systems, and newer NDC feeds. The offering is similar to what larger corporate tools provide but tuned to the needs of smaller programs.
Engine’s business model focuses on transaction revenue and optional products rather than long term contracts or minimum spend commitments. Customers can join without committing volume, then add premium features as their needs mature.
The flagship premium feature is Flex, which lets travelers change or cancel many hotel bookings without penalty, even when those changes fall outside the property’s normal window. FlexPro is a subscription version of that protection, sold on a monthly or annual basis so companies can apply it across their programs.
By Engine’s own figures, Flex and FlexPro bookings represent a large share of total bookings and an even larger share of total customer spending. The company reports that these products have generated significant savings by avoiding change and cancellation fees and has extended the same flexibility concept to flights.
Giving hotels a path into the SME ecosystem
Engine is not only selling to buyers. It also markets itself as a full stack distribution and group solution for hotel partners that want better access to small and midsize corporate demand.
On the rate side, Engine negotiates special prices directly with chains and individual properties that its clients would struggle to secure on their own. On the sales side, Engine helps hotels respond to group requests and reach smaller businesses that normally book through public channels. Silve contrasts this approach with online travel agency distribution, which he describes as oriented more toward transient leisure travelers rather than repeat business stays.
Engine’s growing focus on group travel, including tools for room blocks and extended stays, is part of the same push to make the platform a preferred path for small and midsize business lodging demand on both sides of the marketplace.
Chasing a very large, very messy SME market
Large travel management companies have long acknowledged that the unmanaged SME segment is one of the biggest growth opportunities in business travel. Estimates put unmanaged small and midsize travel at hundreds of billions of dollars globally, with only a fraction of that under formal management today.
Engine is betting that its go to market model is better tuned to that segment than traditional TMC sales motions. The company has invested heavily in outbound sales and has opened hubs in Chicago and Tempe alongside its Denver headquarters, with additional offices in San Francisco and New York.
As its brand becomes more familiar, Engine is seeing more signups come through product led growth, where organizations test the platform on their own rather than going through a long sales cycle. Even so, Silve says the SME space remains difficult for many providers that try to move down market, which is why Engine continues to lean on direct outreach and a focused product set built around control, flexibility, and simple billing instead of full service management.
In that sense, Engine’s growth story is as much about discipline as it is about scale. The company finds unmanaged or lightly managed programs, gives them just enough structure to bring order to their spend, and then expands alongside them as their travel needs grow.
