LightSource vs. Prewave

Where Prewave is genuinely strong

Prewave was founded in Vienna in 2017 as a spin-off from TU Wien, built on doctoral research into predicting supply chain risk from public data, and has raised more than 90 million euros to date per Austrian press, including a 63 million euro Series B led by Hedosophia in 2024. The product reads about 4.5 million public data points a day, across media, social, regulatory, and customs sources in more than 400 languages, and turns them into supplier risk alerts and scores spanning 200+ risk categories, with 1.6 million registered suppliers monitored (prewave.com).

Its compliance coverage is productized: regulation-specific solutions for CSDDD and Germany's LkSG, dedicated modules for EUDR, CBAM, forced labour, and sanctions screening, plus UFLPA support marketed to North American importers. Tier-N mapping traces exposure below Tier 1 down to commodities and raw-material origins. The reference base is serious manufacturing: Renault Group monitors roughly 40,000 Tier-1 suppliers across 25 plants and credits Prewave with cutting major crisis impact by up to 40 percent, and its customer pages name Audi, Volkswagen, Magna, Lear, Kärcher, and Hilti. Prewave also publishes that Gartner named it a Leader in the 2026 Magic Quadrant for Supplier Risk Management Solutions for the second consecutive year.

LightSource does none of this. There is no external risk monitoring feed, ESG scoring, or regulatory evidence workflow in LightSource. A manufacturer that needs to prove due diligence to a regulator, or wants machine-read early warnings from three tiers down, needs a tool like Prewave for that job.

Where LightSource is the system of record

LightSource is the Direct Materials Operating System: the working environment where parts, BOMs, and drawings live and where sourcing decisions get made, spec through scale, PLM through ERP. AI ingestion turns Excel files, PDFs, and drawings into a revision-managed item master. Part-level RFQs go out with drawings attached, from three-bids-and-a-buy to multi-round strategic events. LightSource is the only sourcing solution with true flexible cost breakdowns: category-specific bid sheets per event, with AI that normalizes whatever format a supplier quotes in. Award scenarios, split awards, and approvals turn decisions into tracked contracts with per-part, per-supplier price history.

The supplier side is free, with 20,000 suppliers live and onboarding in under 30 minutes. Implementation runs in days on flat files rather than months, with implementation included. Manufacturers including BRP, Canada Goose, HelloFresh, Shure, Serta Simmons Bedding, Yum! Brands, Infinite Machine, and Arxada run their direct materials sourcing on it; Arxada's CPO says requoting cycles that used to take weeks now run in days. LightSource was named a Gartner Cool Vendor 2025 (Sourcing and Procurement Technology) and carries venture backing co-led by Lightspeed and Bain Capital Ventures ($33M). See the product and customer results for detail.

None of this exists in Prewave, and Prewave does not claim it does. Its own product and services description contains no parts, BOMs, RFQs, quotes, or awards. When a risk alert turns into a commercial decision about specific parts at specific prices, LightSource is where that decision is made and recorded.

The structural difference: Prewave models suppliers, LightSource models parts

The two products barely overlap because they model different things. Prewave's data model runs supplier, site, commodity, raw material. LightSource's runs item, revision, BOM, RFQ, quote, award.

The difference shows up most clearly in what acting on risk means in each product. Prewave's Action Platform routes findings to gap analyses with consulting partners, on-site audits through TÜV SÜD, desk audits, and supplier engagement programs. Those are compliance and remediation actions aimed at the supplier you already have, and they are the right first response to many findings. They do not include commercial re-sourcing: there is no requote or alternative-supplier quoting motion anywhere in the product. Prewave's partner page makes the architecture explicit: it positions itself as the risk layer alongside Coupa, SAP Ariba, Ivalua, and JAGGAER, and it partners with Scoutbee for supplier discovery rather than building discovery itself.

The two supplier networks tell the same story. Prewave's 1.6 million registered suppliers join a free network to share compliance credentials and improve their risk scores. LightSource's 20,000 live suppliers join a free network to receive RFQs and quote parts. Comparing the two figures directly would miss the point; each network exists for a different purpose, and neither substitutes for the other.

Running Prewave and LightSource together

The useful way to think about the pairing is as one loop with two halves. Prewave shortens the time it takes to find out something changed: a fire at a Tier-1 stamping supplier, an insolvency signal, a forced-labour allegation three tiers down. LightSource shortens the time it takes to respond commercially.

A team running both takes the alert, pulls the affected parts and their revisions in LightSource, checks per-part price history and current awards to size the exposure, identifies alternates from the supplier network, launches part-level RFQs with drawings attached, compares cost breakdowns, and re-awards, with the whole paper trail kept in one place. Prewave's audit and corrective-action workflows then document what happened to the incumbent supplier, which matters when the same event carries a compliance obligation.

On the integration side, LightSource exposes a GraphQL API that mirrors the whole platform, and Prewave offers an API plus off-the-shelf and custom system integrations, so risk scores and sourcing records can feed the same reporting stack. Neither product replaces the other, and neither vendor claims otherwise. If budget forces a sequence rather than a pairing, the deciding question is which gap costs you more today: learning about supply base problems late, or executing the commercial response slowly once you know.

What public reviewers say

On G2, LightSource holds a 4.9/5 rating across roughly 11 reviews, while Prewave holds 3.5/5 from a single review written in March 2024. Both bases are small, and one review is not a rating, so treat everything here as anecdote rather than verdict.

Prewave's G2 base is a single review, too thin to quote as representative. For what one data point is worth, that reviewer credits the multilingual monitoring net for catching early warning signals traditional methods miss, and finds that the volume of alerts takes real time to work through. The small set of verified enterprise reviewers elsewhere rates Prewave higher and echoes both halves, describing a responsive, quick-moving team through setup and efficient technology-supported due diligence, alongside complaints about noise from irrelevant risk alerts, duplicate records in the supplier database, and supplier self-assessment questionnaires they find too basic.

On the LightSource side, the reviews are recent and specific. A Vice President of Supply Chain writes: "We are centralizing information about our supply base in a single location that is accessible for all departments that need access to this information in order to complete their work. This helps breakdown silos internally and ensure that we are making decisions based off 'apples to apples' comparisons." G2 reviewer (Mid-Market, 2024)

The recurring critical note concerns supplier adoption, and it doubles as a note on how the network grows: "The biggest challenge of LightSource is just getting the suppliers to try it. Once they try it --- they're also hooked." G2 reviewer (Mid-Market, 2024)