OnSpec Software Ltd · United Kingdom
Software built on spec, for the skilled trades.
OnSpec Software is an independent British software company. We design and build professional tools that put authentic technical knowledge in tradespeople's hands, starting with heating engineers.
What we build
Trade professionals stake their reputation, and their customers' safety, on the technical data in front of them. We build software that treats that data with the seriousness it deserves: sourced from the genuine manufacturer documentation, structured for the job at hand, and delivered in seconds on a phone held in one gloved hand.
The company was formed in 2026 to bring consumer-grade software quality to tools for working engineers, a field long served by dated utilities and forum searches.
- aAuthentic source data, never approximated
- bBuilt with working engineers, on real jobs
- cPriced for sole traders and small firms
Our products
Flint
Your AI onsite guide for heating engineers
Manuals, fault codes and structured service data for over 900 UK boilers, onsite calculators, and an AI assistant grounded in the actual manufacturer manual. For gas, oil and LPG engineers across the UK.
ServiceHQ
WhatsApp, built into ServiceM8
Customer WhatsApp enquiries land in the ServiceM8 Inbox ready to become jobs, staff reply from the job itself, and optional AI drafts a suggested reply for them to approve. For UK trade businesses running on ServiceM8.
Contact
For anything relating to OnSpec Software or Flint, write to support@onspecsoftware.com. We reply within one working day.