LightSource vs. Keelvar

Where Keelvar is strong: big events, hard constraints, autonomous agents

Keelvar has spent 14 years building category-defining combinatorial award optimization, and the results show it. Sourcing Optimizer models billions of award scenarios across price and non-price factors, capacity constraints, and conditional discounts, which is why freight teams use it to tender thousands of ocean and road lanes in a single event. The outcomes Keelvar publishes are serious: $440M in savings over two years on $7.5B of spend at Stanley Black & Decker, $64M in one year at Mars, and Coca-Cola, Maersk, Siemens, and Samsung among its named customers. Since 2023, Keelvar has layered autonomous sourcing agents on top of the optimizer, and the Kai orchestrator (launched November 2025) turns a plain-language request into a configured event, with named agents such as Optimal Close and Autonomous Rate Refresh running recurring events end to end under human approval. Rate Manager (March 2025) re-opens sourcing automatically when contracted rates expire or drift from benchmarks. Support is a genuine strength as well: G2 reviewers rate Keelvar 4.7 out of 5 with a 9.8 quality-of-support score. LightSource offers none of this optimization machinery. If the job is award math at mega-event scale, Keelvar is the specialist.

Where LightSource is strong: the part-level record that persists

LightSource is built around the part rather than the event. AI ingestion turns Excel files, PDFs, and drawings into a revision-managed item master, nested bills of materials carry snapshots, diffs, and cost roll-ups, and RFQs go out at the part level with drawings attached. Suppliers quote in whatever format they already use, and AI normalizes those quotes for comparison instead of requiring conformance to a bid template. Awards become tracked contracts, so every part accumulates per-supplier price history across events and revisions. Around that record sits supplier management with scorecards, data rooms, and certification collection, plus a network of 20,000 suppliers who use LightSource free, with AI capability-based discovery for finding new ones. Manufacturers including BRP, Canada Goose, HelloFresh, Shure, and Infinite Machine run direct-materials sourcing on it (see customer stories), and the company was named a Gartner Cool Vendor 2025 (Sourcing and Procurement Technology), with venture backing co-led by Lightspeed and Bain Capital Ventures ($33M). None of this parts infrastructure exists in Keelvar's public materials: no item master, no BOM revision management, no PLM story, and no price history that survives the event.

The structural difference: an event engine and a system of record

The clearest way to understand this comparison is by what each product remembers. In Keelvar, the unit of work is the sourcing event: a bid sheet is configured, suppliers bid, the optimizer solves, an award is recommended, and the event closes. That design fits a freight tender well, because the lanes change every year anyway. It fits engineered parts poorly, because the same part gets sourced, revised, and re-sourced for years, and the question of what you paid last time, from whom, and why needs a durable answer. LightSource keeps that answer: items, revisions, quotes, awards, and total cost history live in one record that outlasts any single event and any single buyer. To be fair to Keelvar, its direct-materials usage is real; packaging, ingredients, and components are documented categories with named customers. But nothing in its public materials describes an item master, revision management, or part-level price history, because that has never been the product's job. For a manufacturer, these read less as head-to-head competitors than as tools built for different kinds of spend within the same function.

Running both: Keelvar for logistics tenders, LightSource for parts

The honest split is by spend type, not by layer. Both products execute sourcing events, so the overlap in RFQ execution is real, and a team should not plan to run the same category through both. A global manufacturer with nine-figure logistics spend can keep Keelvar for ocean and road tenders and agent-run tactical events, where combinatorial optimization across thousands of lanes pays for itself, and run engineered-component and BOM-driven sourcing in LightSource, where work starts from parts, drawings, and revisions, and awarded pricing needs to live on as BOM cost history. Neither product does procure-to-pay or contract authoring, so both sit upstream of an ERP or S2P layer; LightSource pushes awarded pricing to your ERP through its GraphQL API (see integrations). For a mid-market manufacturer, running both is usually overkill: LightSource covers the direct-materials workflow end to end, and Keelvar becomes interesting when logistics tender complexity is a spend problem of its own.

What adding LightSource looks like in practice

LightSource implementations start with flat files, not an integration project. Teams go live in days on Excel exports of items and BOMs, run their first sourcing project inside about 30 days, and implementation is included in the price rather than billed as a services engagement. AI Item Ingestion structures messy part data on the way in, so a data-cleanup phase is not a precondition. Suppliers onboard through an RFx invitation in under 30 minutes, use the platform free, and can keep quoting in Excel. When IT is ready, the GraphQL API supports PLM pulls and awarded-pricing pushes to ERP. This is a different motion from enterprise optimization tooling, where complex event configuration commonly leans on a vendor analyst (a recurring theme in Keelvar's G2 reviews). See the product for the full direct-materials workflow.

What public reviewers say

On G2, Keelvar holds 4.7/5 across about 23 reviews and LightSource holds 4.9/5 across a small early base of about 11 reviews, both as of September 2026. Both bases are small for products of this age, so treat individual reviews as anecdotes rather than statistics; the links go to the full, unfiltered review pages. A few reviews are specific enough to be worth quoting.

On Keelvar, the praise centers on the optimizer doing exactly what it is sold to do on large bid sets:

"The scenario builder has been extremely helpful in analyzing our bids... easily being able to create different scenarios to choose... the best business decision."

-- G2 reviewer (eProcurement analyst, Enterprise)

The critical reviews land on the same point our comparison does: past standard events, configuration leans on Keelvar's own people.

"Some more advanced settings are difficult to figure out without an analyst from Keelvar being dedicated to your tender."

-- G2 reviewer (Mid-Market)

"Some features (as for example the traffic light feedback system) can be set up via different places in the tool, which gets a little confusing over time."

-- G2 reviewer

LightSource's early reviews concentrate on onboarding speed and how much routine sourcing work the AI absorbs:

"Getting started is extremely easy, and the platform's intuitive design means we're not wasting time figuring things out."

-- G2 reviewer (VP of Supply Chain, Mid-Market)

"The AI-driven approach makes handling everything from contracts to supplier scoring feel like less of a chore."

-- G2 reviewer