The term “Language Solutions Integrator” (LSI) was first introduced in the Slator 2025 Language Industry Market Report and is a term used to describe organizations whose core offering is to deliver fit-for-purpose multilingual content solutions by integrating language technology and AI with human experts as part of a fully managed solution.

While LSIs use technology — including AI — as part of the multilingual content production process to gain efficiency and reduce overall costs, they are ultimately responsible for the final outcome of multilingual content, as their value proposition includes the involvement of expert linguists and quality specialists.

These experts-in-the-loop (EITL) are typically deployed and managed directly by the LSI to ensure that outcomes meet the specific requirements of each buyer.

Examples of LSIs include TransPerfect, LanguageWire, RWS, Lilt, or Boostlingo — to name just a few among the thousands of LSIs operating globally.

A potential misconception is that LSIs do not own and operate any proprietary technology. However, this is not the case — LSIs monetize human-managed outcomes, even when AI-enabled. In fact, many LSIs own market-leading technology and may not even be tech-agnostic.

Slator 2025 Language Industry Market Report

The 150-page report offers a comprehensive view of the 2025 global market — with market sizing, AI capability breakdowns, buyer insights, use cases, survey data, and projections through 2030.

Smartling, for example, is an AI-first company with an all-in-one language AI platform available to buyers of localization services and other LSIs. However, Smartling’s EITL services enable the company to deliver fully managed, fit-for-purpose multilingual content solutions, meaning that it is also a LSI.

In short, LSIs can work with any number of service providers and technology solutions with a core value proposition to deliver human-verified multilingual language content.

In addition, LSIs may choose to integrate or partner with Language Technology Platforms (LTPs), which are covered here.

From a revenue perspective, LSIs typically operate on a project- or SLA-basis and price their solutions based on volume. LSIs that own proprietary technology may complement this with revenue generated based on a SaaS subscription model, whose primary metric is Annual Recurring Revenue (ARR).