StemmaAIFor UK manufacturers, whatever you make
Stemma checks every supplier invoice against your contracts and pricing history, flags the overcharges that slip through, and drafts the claim to reclaim them.
Free six-week pilot. You only pay if we find money.
~£1mburned yearly
On every £100m of supplier spend, around £1m leaks straight through.
>10,000hours yearly
On every £100m of supplier spend, roughly 5 full-time roles vanish into admin.
Unit rates billed above your contracted tier.
Tiers that should have applied but did not.
Price rises beyond the agreed index or cap.
Freight, energy, and add-on fees you never agreed.
The same line billed twice, even across separate invoices.
Charges converted on the wrong basis.
Link your ERP and contracts. Read-only, no engineering work, no rip-and-replace.
Every contract clause and every invoice line, parsed and checked as invoices arrive.
Breaches surface with the clause and the invoice line side by side, for your team to review.
Stemma drafts the recovery claim. You confirm it and send it to the supplier.
Stemma reads. Your team decides. You stay in control of every claim.
And 7+ more we connect to, not shown here. Stemma reads from your data and never writes back, so a new system connects in hours, not weeks.
If we find nothing, you owe nothing.
Security built to the standard finance and procurement leaders expect.
Data stored and processed exclusively in UK and EU regions. GDPR-aligned. No data leaves the region.
Hosted on Microsoft Azure, the same Tier-1 infrastructure trusted by global banks and regulators.
TLS 1.2+ in transit. AES-256 at rest, with keys managed via Azure Key Vault. Decrypted in memory only for audit processing, never written to disk unencrypted. All access logged.
Stemma reads from your ERP. We never write back, modify, delete, or create records.
Your contracts and invoices are never used to train AI models, ours or anyone else’s. Zero-retention tier with all LLM providers.
GDPR-aligned today. DPA on request. SOC 2 Type II in progress for 2026.
For subsidiaries of larger groups, we can deploy into an existing AWS or GCP agreement where required.
Advised on procurement and security.
Johannes spent his early career in investment banking at Arma Partners and private equity at Triton Partners. He holds a bachelor’s from BI Norwegian Business School, the top-ranked business school in Norway per the Financial Times, where he finished best in his class of 263. He is also a former Chess Olympian for Norway, a member of Team Magnus Carlsen, and a Nordic Champion.
Devvrat was a founding software engineer at a £100m+ startup, and worked alongside the Google DeepMind team. He holds a Master’s in Intelligence and Machine Learning from Imperial College London, the #2 technical university in the world per QS, where he wrote the best master’s thesis, and a Bachelor’s from the Indian Institute of Technology Gandhinagar. He has published 9 AI papers at top-tier (A*) conferences.
Book a short call with the founders. We walk through how Stemma reads a contract, show sample findings on an anonymised contract, and give you a directional estimate for your spend.