ProvenMetal, a Y Combinator S26 company founded in 2026, is now accepting orders for fully domestic printed circuit board manufacturing with a standard seven-business-day turnaround and no expedite fee. The company runs sourcing, fabrication, assembly, testing, and shipping entirely within the United States (ProvenMetal).

The seven-day clock starts when a customer approves the quote and confirms the order. Because seven business days is ProvenMetal's standard offering rather than a rush option, the company charges no expedite fee. For board revisions, ProvenMetal works from the customer's last revision, so subsequent builds come back faster than the initial one (ProvenMetal).

Will Carkner and Johnny Doyle, two students from Trinity College Dublin, founded the company and began assembling circuit boards out of a garage in the Dogpatch neighborhood of San Francisco using prosumer-grade equipment: a NeoDen YY1 pick-and-place, a Glenbrook X-ray, solder paste stencils, and manual rework stations (Y Combinator, Trinity College Dublin). Trinity College Dublin announced the founders' Y Combinator placement on 23 June 2026 (Trinity College Dublin). The founders initially announced ProvenMetal through a Hacker News Launch HN post (Hacker News).

ProvenMetal's target customers are drone and defense teams that need assembled boards returned within a week. The company assigns a single US-based team as point of contact for each build, so customers deal with one owner across the entire pipeline rather than coordinating across multiple vendors. Every order ships with a full quality record covering parts, process, and inspection data (ProvenMetal).

On the sourcing side, ProvenMetal sources every part from US suppliers and verifies each component against the customer's bill of materials before fabrication begins. Components are stored at the company's San Francisco headquarters, then kitted and routed through its manufacturing network. ProvenMetal also offers long-term storage for long-lead-time items, which is where the revision-speed advantage becomes concrete: if parts are already in inventory from a prior build, the procurement phase of a subsequent order collapses to near zero.

The company's toolchain integration is built around reducing the front-of-house bottleneck. The founders concluded that quoting, DFM review, and part procurement were the real constraints on turnaround time, not assembly itself (Hacker News). To compress that pipeline, ProvenMetal ships KiCAD and Altium plugins (hosted at github.com/proven-metal/provenmetal-kicad and github.com/proven-metal/provenmetal-altium) that push a design's BOM directly into the ordering platform, enabling component procurement before layout is finalized. When an order is placed, the platform automatically sources the BOM across US and overseas distributors (Hacker News).

ProvenMetal maintains a profile for each manufacturer in its network and formats incoming orders to match that manufacturer's specific requirements, eliminating multi-day email round trips for clarification. A heuristic harness called Fable 5 checks board designs for DFM issues against each manufacturer's capability sheets, catching problems before the design reaches the fab (Hacker News).

The broader context here matters. The US share of global PCB production fell from 30% in 2000 to roughly 4% today, while Chinese manufacturers now account for 55% of global output (Hacker News). ProvenMetal's domestic model, with sourcing restricted to US suppliers, sits directly against that decades-long offshoring trend. Whether a garage-origin startup can meaningfully shift that balance is an open question, but the structural approach is worth flagging: by automating BOM procurement and DFM validation rather than focusing on the assembly step itself, ProvenMetal is attacking the part of the process that has historically absorbed the most calendar time in low-volume, fast-turn PCB work.

The company describes itself as assembling the fastest circuit boards in the United States (Y Combinator). Ordering is now open; customers can send design files or specs to founders@provenmetal.com or call +1 (650) 229-4712 (ProvenMetal).

For engineering teams that have grown accustomed to sending Gerber files to Shenzhen and waiting two to three weeks for assembled boards to clear customs, a domestic seven-day standard turnaround with full traceability documentation is a genuinely different proposition. The quality record alone, covering parts provenance, process data, and inspection results, addresses a procurement requirement that defense and aerospace teams have traditionally satisfied through expensive vendor qualification programs. If ProvenMetal can hold the seven-day commitment at scale, the constraint shifts from manufacturing throughput to whether US-based component supply can keep pace with demand from teams that suddenly have a faster option.